The Pioneer Venus Orbiter Catalog of Gamma-Ray Bursts

TL;DR

This paper presents a catalog of 318 gamma-ray bursts detected by the Pioneer Venus Orbiter over 14 years, providing valuable data on bright gamma-ray bursts and constraining their distribution slope.

Contribution

It offers a comprehensive catalog of bright gamma-ray bursts and constrains the bright end slope of their Log N-Log P distribution, complementing existing datasets.

Findings

Detected 318 gamma-ray bursts over 14 years.

Constrained the bright end slope of the Log N-Log P distribution to -1.52±0.15.

Provides data that complements BATSE observations.

Abstract

The Pioneer Venus Orbiter (PVO) Gamma-ray burst experiment detected 318 gamma-ray bursts over about 14 years between 1978 and 1992 with near $4\pi$ coverage. This data set complements BATSE by determining the properties of the brightest gamma-ray bursts. PVO places a constrains on the slope of the bright end of the Log N-Log P distribution. The slope is -1.52$\pm 0.15$.

Tables

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
780914	60228.761	0.125	28.13	139	0.7	1.1	1.3	0.72	30.0	8.4	C
780918	71327.164	0.125	14.06	142	1.8	1.9	2.3	1.13	30.2	11.4	C
780921	14222.567	2.000	14.06	140	1.4	0.9	1.4	0.77	4.4	2.3	CI
781019	66357.776		16.88	138	0.9	1.4	1.6	1.00	7.8	3.3	BDI
781104	58627.977	0.125	28.08	140	3.7	6.5	7.1	1.11	18.8	7.4	C
781115	76002.145		11.25	137	1.1	2.0	1.9	0.87	2.5	1.1	BDI
781119	34102.416	8.000	28.02	139	4.3	7.5	8.9	1.12	12.0	3.6	C
781121	5637.282	8.000	26.06	137	0.9	1.5	2.6	1.06	67.0	27.4	C
781124	14040.747	0.125	22.50	134	2.5	2.8	2.8	1.10	3.7	1.0	C
790113	27197.975	2.000	28.12	132	2.7	4.4	4.7	1.09	28.0	21.8	C
790305	57118.029	2.000	24.21	139	68.8	34.4	31.3	1.00	101.7	37.3	CH
790307	80247.397	2.000	28.13	136	2.6	4.3	5.6	1.12	25.3	8.9	C
790313	62795.910		28.13	133	1.2	1.8	1.8	1.04	13.9	6.2	B
790325	49292.950	4.000	28.13	124	1.1	1.8	2.6	0.87	17.0	5.2	C
790329	81004.388	0.125	28.13	124	0.7	1.0	1.3	0.32	37.6	21.2	C
790331	75763.644	0.125	5.63	128	0.9	1.2	1.4	1.13	7.6	4.2	CD
790402	34980.592	0.125	28.13	125	0.9	1.2	2.0	0.25	14.8	6.0	C
790406	41985.240	0.125	5.63	123	1.9	1.1	0.5	1.13	0.1	0.1	C
790412	79347.192		28.13	118	0.6	1.0	1.5	0.70	24.8	9.4	CD
790418	27692.334	0.375	22.50	123	2.7	3.8	4.5	1.13	12.4	8.7	C
790419	57945.312	2.000	22.50	127	1.1	1.8	2.8	0.85	107.4	21.2	CI
790502	15707.245	0.125	28.13	118	1.1	1.3	1.6	1.08	8.5	2.6	C
790509	1911.289	0.375	5.62	119	1.2	0.6	0.3	0.40	0.2	0.1	C
790613	50623.772	0.125	5.62	110	0.9	0.6	0.2	0.13	0.1	0.0	CFH
790622	2988.550	0.500	28.13	115	1.5	2.1	3.3	0.86	55.4	20.0	CF
790626	56390.878	0.125	16.88	115	1.9	1.7	1.4	1.12	13.7	1.0	CFI
790628A	66621.471	0.250	5.63	114	0.6	0.3	0.2	0.04	20.5	13.6	CFH
790628B	73020.091		22.50	115	0.5	0.6	0.6	0.04	19.5	3.2	BDFHI
790731	38473.986	0.500	28.13	112	0.6	0.9	1.3	0.19	39.8	18.7	CFH
791014	40598.670	2.000	14.06	128	0.5	0.7	0.9	0.02	238.0	148.5	CFHI
791031	33169.474	2.000	25.31	113	0.5	0.5	0.8	0.71	74.5	59.9	CFH
791101	64378.737	2.000	28.13	292	0.6	0.9	1.4	0.47	45.5	12.3	CFH
791105	49031.921	2.000	11.25	119	0.7	0.9	1.0	0.47	2.1	1.0	CFH
791109	28798.111		11.25	116	0.5	0.6	0.7	0.32	3.9	2.0	BH
791111	40225.103	0.125	21.56	114	0.7	1.1	1.7	0.49	3.9	1.7	CI
791115	82061.609	0.500	25.31	116	2.8	3.4	4.3	1.13	79.4	18.0	CI
791116	51526.993	0.500	28.12	115	3.9	6.1	6.1	1.11	77.2	60.5	C
791119	52200.992	0.375	5.63	111	0.7	0.4	0.2	0.38	0.2	0.1	CHI
791124	22496.675		28.13	110	0.8	0.8	1.3	0.25	26.6	12.6	BDEH
791206	77604.599	5.996	5.63	107	0.8	1.1	0.8	0.30	2.3	0.5	CI
791209	56816.067	0.125	22.50	107	2.0	2.3	3.1	1.01	14.1	5.3	C
791220	62954.627	0.375	19.69	261	0.9	1.5	1.4	0.94	19.6	9.2	CI
800105	38220.415	5.996	28.13	107	0.4	0.7	1.1	0.03	52.5	7.7	CH

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
800213	27052.207		28.06	110	4.1	6.3	11.2	1.11	21.1	13.1	BDE
800228	37993.727	0.125	19.69	114	0.4	0.6	0.9	0.93	1.0	0.7	CDH
800322	26336.924	2.000	19.68	110	3.0	3.2	3.0	1.10	5.4	3.7	CI
800331	2862.299	2.000	25.31	110	2.0	3.2	4.8	1.10	22.1	5.4	CI
800408	51596.984	2.000	5.62	103	1.4	0.6	0.4	0.38	0.3	0.0	CI
800410	75233.794	2.000	25.31	106	1.1	1.4	1.7	0.59	13.6	5.1	CI
800412B	72196.477	2.000	14.06	108	0.8	1.7	2.8	0.13	122.9	20.7	C
800412A	72549.352	2.000	14.06	108	1.1	1.9	2.8	0.32	163.3	18.5	CI
800417	43617.342	0.125	16.87	111	3.3	5.0	4.4	1.10	5.3	1.1	C
800419	4639.896		16.87	110	3.1	3.5	2.4	1.11	3.8	1.1	BI
800512	84907.437	2.000	28.13	105	1.0	1.6	2.5	0.18	80.4	10.2	C
800514	7067.651	2.000	11.25	106	0.9	1.5	1.5	0.80	22.1	12.9	CI
800524	57173.974	2.000	28.13	114	0.7	1.0	1.6	0.52	25.9	5.0	C
800525	66884.316	2.000	14.06	110	3.3	6.2	4.6	1.02	11.4	1.8	CI
800602	48135.888	0.125	28.12	109	3.4	4.7	5.2	1.12	12.8	7.8	C
800709A	26783.157	0.125	16.88	103	1.7	2.4	2.8	1.13	65.2	44.8	C
800709B	79330.729	0.125	28.13	102	1.3	1.7	2.4	0.99	9.8	5.9	C
800727	57425.402		11.25	98	0.8	1.1	1.2	0.22	17.9	3.1	CI
800806	79559.817	0.125	16.85	128	3.7	2.2	1.3	1.09	0.5	0.1	CI
801017	12669.061	2.000	16.88	116	1.1	1.6	2.7	0.86	97.9	78.9	C
801119	61194.237	5.996	19.69	103	0.9	1.3	1.5	0.81	7.2	2.5	CI
801205	35354.048	5.996	11.22	90	3.8	1.9	1.0	1.12	0.2	0.1	C
801210	42671.497	5.996	28.13	101	2.4	3.7	2.9	1.13	15.6	11.1	ACD
801220	66026.789	2.000	28.13	95	2.1	3.3	5.5	0.67	17.6	6.8	C
810101	20173.071	2.000	22.50	90	1.1	1.4	1.6	0.86	7.7	2.0	CI
810103	17834.577	2.000	8.44	89	0.9	1.2	1.4	0.76	3.5	1.2	CI
810129	16035.332	8.000	28.13	91	1.1	1.4	2.3	0.36	51.2	16.2	C
810214	54607.752	4.000	14.06	93	2.0	2.6	3.7	1.13	52.1	21.0	CDEHI
810228	58470.431	2.000	28.13	93	1.8	2.9	5.1	1.07	16.6	7.8	C
810424	36287.944		19.69	97	2.5	3.5	2.7	1.12	8.3	1.9	B
810511	85630.096		22.50	216	1.2	1.4	1.6	0.72	4.6	1.1	BI
810605	19150.426	4.000	19.69	137	2.1	3.5	4.9	1.13	19.7	7.5	CI
810611	34735.935		22.50	93	0.8	1.1	1.8	0.55	17.3	8.3	BDEI
810709	78840.511	5.996	5.63	91	1.3	1.0	0.4	1.13	2.7	0.1	CI
810721	18529.511	5.996	28.13	154	0.8	1.2	1.6	0.60	21.6	8.6	C
810801	62842.180	5.996	28.13	97	1.4	2.1	3.7	0.80	19.3	6.1	C
810805	23372.900	0.375	14.06	94	0.9	1.2	1.0	0.81	8.4	2.8	CI
810829	2173.753		11.25	92	1.0	1.3	2.1	0.93	6.6	3.6	BDEI
810902	68091.892	4.000	22.50	92	2.9	5.0	6.5	1.11	17.1	3.1	CI
810905	21521.150		8.44	102	0.6	1.2	1.3	0.18	4.1	1.4	BDEI
810906	42798.722	0.250	28.13	96	1.2	1.8	2.7	0.87	170.8	148.4	C
810926	67006.205	3.000	22.12	98	3.4	3.1	3.8	1.12	35.5	14.9	CI
810930	63628.748		19.69	94	2.4	3.1	2.5	1.11	6.3	3.5	BI

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
811016	85923.086		20.86	509	9.6	12.6	16.8	1.00	13.2	4.5	BD
811209	11514.264	2.000	5.63	96	1.0	1.5	0.9	0.81	26.4	11.6	CI
811215	71943.760	2.000	28.13	100	0.7	1.1	1.8	0.76	21.7	8.2	C
811225	13524.775	0.125	22.50	97	0.9	1.4	1.8	0.55	16.8	6.9	CI
811231B	5789.168		28.13	177	0.9	1.3	1.6	1.01	6.4	3.5	AD
811231A	28782.427	2.000	5.59	94	3.1	1.5	1.2	1.12	0.2	0.1	CI
820104	57796.693	0.125	8.44	94	0.8	1.2	1.6	1.13	4.2	1.6	CDI
820118	15284.272	0.125	8.25	99	1.8	1.3	0.7	0.81	69.2	49.5	CI
820301	9389.453	0.125	28.13	104	2.2	3.1	6.0	1.04	113.9	58.4	CD
820302	11167.418	0.125	11.25	96	1.5	1.3	1.2	0.63	1.8	0.6	CI
820313	9651.370	0.125	8.44	101	1.2	1.7	1.8	0.35	37.7	28.4	CDEHI
820320	47604.742	2.000	14.06	107	2.0	4.1	4.6	0.93	59.9	17.7	C
820405	22720.225	2.000	5.62	103	1.2	0.6	0.3	0.96	0.1	0.0	CI
820406	34072.679	2.000	11.23	104	4.7	5.6	4.7	1.12	15.8	1.6	CI
820511	52355.686	0.125	8.44	110	1.1	1.1	1.2	0.40	2.4	1.5	CI
820519	40460.219	2.000	11.17	112	5.4	2.7	2.0	1.11	0.5	0.2	CI
820525	74300.853	2.000	14.06	108	1.2	1.5	1.1	0.33	15.7	5.0	CI
820802	51739.497	3.000	16.88	100	1.2	1.7	2.4	0.86	6.5	2.8	CI
820820	50165.302	4.000	28.13	92	1.8	3.0	2.9	1.07	177.2	8.1	C
820825	41659.017	0.250	28.13	93	1.6	2.1	2.8	1.13	31.4	14.9	C
820827	71917.724	4.000	28.03	95	6.1	9.7	15.2	1.09	9.7	3.7	C
820828	49784.120	4.000	25.31	100	1.0	1.9	2.9	0.89	5.7	2.3	CI
821012	55373.499		28.12	91	2.0	3.2	3.6	0.97	18.5	7.6	B
821015	47420.015	0.375	5.63	95	1.6	1.3	0.6	0.40	0.4	0.2	CI
821027	3146.424		25.31	92	1.9	2.9	3.3	0.81	9.7	5.3	B
830108	28934.607	0.250	5.63	101	1.1	0.8	0.8	0.53	21.9	10.5	C
830117	21023.583	0.125	25.31	93	2.4	4.4	4.1	1.13	43.2	10.3	CI
830126	19544.646	4.000	28.13	96	2.2	2.9	4.3	0.99	61.4	48.0	C
830127	72203.302	1.000	28.13	96	0.9	1.6	2.7	0.08	26.5	5.6	C
830210	43780.166	5.996	28.13	99	1.7	2.9	2.9	0.98	16.1	4.1	C
830313	80647.074		28.13	101	1.4	2.2	2.9	0.60	13.7	5.9	B
830321	38221.097	4.000	8.44	101	1.2	1.3	1.0	1.03	2.8	0.7	CI
830331	2034.586		25.31	101	1.2	1.7	2.6	0.58	16.2	8.0	BI
830411	75846.266	2.000	16.88	105	1.1	1.9	2.5	0.92	105.8	45.3	C
830414	6551.680		16.88	104	0.6	0.9	1.8	0.04	12.9	5.5	BDEHI
830518B	30555.837	8.000	25.31	105	0.8	1.1	1.8	0.37	12.5	6.3	C
830518A	68919.240	2.000	2.81	103	1.0	1.9	3.3	0.83	41.4	5.6	CI
830522	82132.449		28.00	108	5.4	2.8	1.6	1.10	0.1	0.1	A
830528	67396.745	2.000	19.69	103	1.0	1.6	2.2	0.97	7.6	2.4	C
830604	63896.131	2.000	19.69	102	1.1	1.6	1.8	0.24	52.1	3.3	CI
830608	38710.950	2.000	5.63	99	1.0	0.6	0.7	0.11	3.8	0.6	CI
830610	59718.567	4.000	22.50	113	2.1	3.7	5.8	1.13	11.8	3.1	CI
831116	24381.438	0.125	28.13	111	1.1	1.8	3.0	0.61	29.0	18.7	C

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
831119	12801.339	0.125	22.50	119	1.6	2.0	2.1	1.13	6.3	1.6	CI
831124	79061.955		14.06	116	0.8	1.3	1.8	0.56	5.3	2.2	BDI
831130	74319.281	2.000	28.13	119	1.1	2.2	3.3	0.85	154.4	37.3	C
831221	54715.114		5.61	117	2.0	1.1	0.6	0.96	0.2	0.0	BI
840110	86128.850		28.13	117	1.4	2.5	2.3	0.83	25.0	5.3	B
840119	53254.695	8.000	5.55	125	3.2	1.7	1.0	1.13	0.8	0.0	CI
840222	81893.843		11.25	128	1.4	1.6	1.4	1.10	5.5	1.1	BDI
840304	8511.845	5.996	28.12	118	3.1	4.8	8.9	1.13	$\sim$1000	89.1	C
840425	85664.758		25.31	216	0.7	1.0	1.4	0.60	16.0	8.7	BDEI
840517	36828.511	0.500	11.44	110	1.2	2.2	2.7	0.33	4.1	2.0	CI
840518	38257.338	0.500	5.63	109	1.0	1.5	1.2	1.10	9.3	0.7	C
840519	85230.242		28.13	109	1.1	1.8	1.9	1.04	18.6	4.3	BD
840524	41435.936	8.000	5.61	114	2.2	1.2	0.8	1.05	0.4	0.1	CI
840612	19042.835		19.69	115	1.7	2.4	1.9	0.96	3.5	1.7	BI
840805	85171.139		22.47	119	3.7	6.3	10.8	1.12	17.5	10.0	BD
840818	51281.169	8.000	16.88	117	0.8	1.5	2.5	0.71	141.5	39.4	CI
840820	6754.977		24.74	121	3.9	6.2	8.1	1.12	13.0	5.2	B
840823	45062.667		24.43	122	16.4	23.4	33.7	1.06	9.4	3.5	B
840902	73096.575		8.44	123	1.1	1.1	0.7	0.67	1.0	0.4	BI
840908	71570.067		22.48	118	4.1	6.6	3.5	1.10	4.0	1.0	BI
840916	28501.208	5.996	16.88	120	0.9	1.2	1.6	0.73	26.0	6.2	CI
840917	67521.081		22.50	115	3.0	5.2	7.6	1.11	9.0	2.7	BI
840921	39889.578	5.996	28.11	123	3.3	5.6	9.4	1.09	15.3	3.7	C
841015	82579.840		16.87	122	2.7	3.1	2.8	1.12	5.8	2.6	BI
841114	14473.882		16.88	121	1.5	2.2	3.0	1.00	7.8	4.5	BDI
841125	32885.895	4.000	22.50	120	0.9	1.3	1.3	0.04	49.4	7.0	CI
841209	26135.338	0.188	28.13	121	1.6	1.6	1.6	0.72	15.7	7.4	C
841211	62485.116	3.000	8.44	122	1.1	1.9	2.0	1.03	2.4	1.0	CI
841215	30057.492	0.188	26.26	125	27.9	15.2	14.2	1.00	0.8	0.2	C
850227	3981.007	2.000	19.69	131	1.8	3.2	3.8	1.03	9.2	3.5	CI
850306	43467.247		25.31	127	0.7	1.3	1.7	0.86	10.9	3.8	BDI
850318	35700.482	2.000	22.27	133	5.1	7.5	7.5	1.10	6.0	3.2	C
850404	48092.789	1.000	28.13	130	1.3	1.6	2.0	1.06	87.3	9.6	C
850423	39109.398	1.000	8.44	134	0.7	1.2	1.2	0.25	21.3	9.9	CI
850517	14322.836	2.000	28.13	134	0.6	1.0	1.5	0.05	31.7	19.0	C
850601	43156.306		5.62	137	2.5	1.4	1.0	1.12	0.3	0.1	BI
850610	83266.275		22.50	136	1.3	2.0	3.0	0.86	17.8	5.1	BDI
850615	3925.953	2.000	11.22	139	4.3	2.5	2.8	1.08	2.4	0.5	CI
850624	57155.681	2.000	27.30	149	5.3	9.2	14.8	1.10	33.6	16.0	C
850711	47697.078	5.996	14.06	130	1.0	1.4	1.6	0.07	9.9	5.2	CI
850712	62025.975	4.000	11.25	135	0.8	1.2	1.7	0.04	12.5	5.9	CI
850718	74287.229		8.42	475	1.0	0.9	0.4	0.99	0.3	0.2	BI
850719	84726.277		25.31	205	0.7	1.0	1.3	0.97	13.7	5.7	BDEI

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
850805	2924.284	4.000	28.03	142	5.1	7.6	9.9	1.11	21.2	3.9	C
850811	1523.934	0.250	14.06	140	1.1	1.2	1.0	0.72	16.6	13.5	CI
850820	53042.864		14.06	139	2.4	3.1	3.6	1.10	9.4	1.9	BD
850826	46472.431	5.996	8.44	140	1.0	1.2	1.5	0.29	3.9	1.6	CI
850907	50712.095	5.996	14.06	144	0.9	1.4	1.3	0.41	10.0	3.4	C
850922	45442.764		28.13	146	0.9	1.3	2.1	0.76	16.7	7.4	BDE
850927	42919.193	12.000	28.13	147	2.1	3.7	6.7	1.03	22.4	9.2	C
851017	34671.264	12.000	14.06	149	0.9	1.6	1.4	0.21	2.5	1.0	C
851029	648.210		8.44	148	0.7	1.2	1.7	0.57	5.5	2.1	BDI
860115	34483.807		8.44	153	1.2	1.4	1.3	1.13	2.6	0.7	B
860128	46866.548		14.06	153	0.7	1.0	1.2	0.45	7.4	2.7	BDI
860311	63138.653		27.93	152	4.1	7.3	13.8	1.11	20.8	10.8	BD
860331	44608.967		11.25	151	0.7	1.2	1.7	0.91	6.9	2.0	BDI
860502	79286.862		5.63	156	1.0	0.5	0.3	0.11	0.2	0.0	BI
860517	9082.296	5.996	25.27	156	3.5	3.9	4.5	1.12	18.3	10.1	CI
860522	20015.710	4.000	16.88	158	2.0	2.9	4.0	1.09	82.0	60.9	CI
860525	8822.425		19.69	156	1.0	1.4	2.1	0.74	10.0	5.2	BDI
860530	33654.998		8.44	156	0.9	1.1	1.3	0.60	2.3	1.5	BDEI
860712	73788.316		16.88	164	0.8	1.4	2.1	0.28	9.0	2.9	BDI
860919	22048.305		16.88	164	1.0	1.4	1.4	0.71	14.3	10.7	BDEI
861002	66246.365		27.79	165	5.8	9.6	5.5	1.09	5.3	1.3	B
861030	36309.980		11.25	167	0.9	1.1	1.0	0.91	29.0	3.2	CI
861206	66166.170		8.44	171	1.0	1.3	1.6	1.04	17.0	11.4	CI
861211	31469.073		5.60	168	1.0	0.5	0.2	0.20	0.0	0.0	BI
861223	12242.327	8.000	28.13	169	0.9	1.4	1.5	0.35	23.0	5.6	C
870121	13458.347		11.25	175	0.6	1.2	1.5	0.81	8.2	3.2	BDI
870224	54717.919	4.000	25.31	181	0.7	1.1	1.7	0.09	76.9	58.8	CI
870315	18095.705		19.69	183	0.9	1.3	2.1	0.91	13.5	6.5	BDI
870401	35071.916		28.13	183	1.2	2.1	1.7	1.12	12.6	2.1	B
870408	5485.189		19.69	182	1.1	1.7	1.8	0.79	8.9	5.2	BI
870608	16660.846	0.500	14.66	168	16.5	27.4	19.8	1.00	1.9	0.6	CI
870609	84951.087	0.500	11.25	170	1.2	2.2	3.4	0.83	56.0	41.6	CDEHI
870621	35655.252	0.500	28.13	172	0.5	0.8	1.3	0.05	45.7	30.9	CH
870623	70117.707		22.50	175	0.9	1.5	1.6	0.82	14.3	2.6	BI
870719	14578.781	0.500	28.11	166	2.9	4.7	7.8	1.08	22.6	12.4	CD
870810	28437.312		21.57	165	8.0	13.1	11.8	1.08	9.7	2.6	BI
870904	77966.768		28.12	171	1.9	2.9	2.6	1.05	6.0	3.4	B
870909	30848.413	8.000	19.69	171	0.9	1.4	1.5	0.44	17.9	4.4	C
870911	59210.231	8.000	22.50	165	0.6	0.9	1.4	0.05	61.9	27.0	CH
871031	31064.766	8.000	8.44	162	0.9	1.0	1.3	1.12	3.0	1.1	C
871203	69880.943		28.13	159	0.8	1.3	1.5	0.36	19.7	7.9	B
871213	11961.006	5.996	28.13	162	1.4	1.7	2.1	1.11	4.7	1.7	CD
880111A	46137.436	8.000	25.31	148	1.4	0.7	0.9	0.96	29.3	16.2	C

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
880111B	53905.994	8.000	2.81	150	0.5	0.3	0.6	0.86	4.0	3.3	CH
880128	40559.515	0.250	28.04	153	3.7	5.6	6.9	1.12	12.7	5.5	C
880205	37158.728	2.000	28.13	155	1.3	2.2	4.1	0.69	28.2	9.9	C
880301	45495.146		11.25	152	0.8	1.2	1.3	0.59	5.1	1.7	BDI
880310	13069.198	3.000	28.13	150	2.1	2.2	2.5	1.07	21.8	9.1	C
880311	79992.125		23.94	150	13.4	19.9	23.9	1.06	9.0	4.6	B
880318	59101.103	2.000	19.69	152	1.6	2.7	4.4	0.71	12.3	4.4	C
880320	723.111		8.44	149	1.3	1.3	1.1	0.86	2.1	0.6	BI
880406	27753.768	8.000	16.86	146	3.3	5.7	7.4	1.12	43.3	3.8	CI
880408	1041.552		25.31	166	1.2	1.8	2.1	1.12	15.8	7.4	BDI
880514	63880.844	2.000	16.88	148	2.0	3.8	5.7	1.13	15.8	2.8	CI
880619	64221.028	2.000	25.31	150	1.0	1.7	2.7	0.81	36.2	9.7	CI
880721	29925.718		28.13	163	1.2	1.8	2.2	0.91	24.8	16.6	BDEH
880810	56600.848	8.000	28.13	145	2.3	3.4	4.0	1.01	11.6	3.3	C
880901	74980.027		16.87	140	2.3	3.6	5.0	1.08	11.0	5.4	BDI
880925	65507.370	0.188	28.13	146	2.2	3.9	5.7	1.12	21.5	8.5	C
881007	65817.708	0.188	28.13	142	0.8	1.3	1.8	1.12	24.3	9.9	C
881022	3348.513		18.38	138	0.9	1.5	2.1	0.32	6.3	3.2	BDI
881024B	72163.864		16.88	141	1.8	3.3	4.2	1.09	7.3	2.4	B
881024A	79173.217		5.32	151	7.1	8.9	2.6	1.10	2.0	1.1	ADEH
881117	59343.863	5.996	6.75	138	2.8	1.5	0.3	1.12	1.2	0.1	CI
881210	70935.130		16.87	158	0.8	1.3	2.0	0.17	5.9	2.3	BI
890108	79587.957		28.13	122	1.4	2.1	3.6	0.84	12.6	5.3	B
890130	31757.526	4.000	28.12	124	0.9	1.3	2.2	0.66	15.1	5.8	C
890215	34279.455		26.11	122	9.0	15.1	25.1	1.08	15.9	7.1	B
890216	56548.748	0.500	19.69	121	0.7	1.3	2.0	0.26	10.7	3.7	CI
890218	85133.492		22.50	124	1.5	2.2	3.1	0.66	10.9	3.9	BI
890223	30411.793		28.13	126	1.1	1.8	2.0	0.84	16.5	12.7	BD
890228	8136.410		27.99	119	5.2	6.1	9.2	1.10	12.5	6.2	B
890306	61279.609	1.000	14.06	306	1.1	1.6	1.8	0.87	52.4	18.1	CI
890310	34984.581	0.500	25.31	203	0.5	0.9	1.5	1.10	38.2	8.6	CH
890315	31413.230		5.63	163	0.9	0.8	0.6	0.09	2.5	1.2	BDEHI
890430	74601.517		27.98	114	4.8	8.3	10.2	1.10	15.5	7.7	B
890529	50281.264	0.375	19.69	123	1.1	1.8	2.1	1.03	55.9	17.9	CI
890620B	48284.482	5.996	5.63	95	0.9	0.7	0.4	0.86	0.4	0.1	CH
890620A	53951.663	5.996	8.44	94	1.9	1.7	1.5	1.09	49.4	1.9	CI
890626	14345.424		16.88	88	1.5	2.6	2.2	0.97	4.2	1.7	BI
890703	86286.624	16.000	27.97	84	7.0	12.7	15.1	1.07	42.1	7.8	C
890704	42489.523	8.000	14.06	84	0.9	1.0	0.8	0.94	2.1	0.9	CI
890706	67439.651	16.000	5.60	87	2.3	1.1	0.5	1.07	0.0	0.0	CI
890710	35698.167	5.996	5.61	87	4.9	2.5	1.2	1.11	0.2	0.1	C
890713	66781.526		28.13	87	2.9	5.4	6.7	0.93	19.5	8.0	BD
890801	86250.249		14.06	92	1.1	1.8	1.9	1.01	6.4	3.7	BDI

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
890828	21500.393	4.000	27.69	275	4.7	7.2	8.2	1.08	14.5	3.6	C
890915	5725.229		28.13	90	2.4	3.4	4.6	1.13	14.4	4.8	B
890923	30662.920	8.000	11.02	95	8.4	12.2	7.3	1.00	5.1	0.8	CI
891012	40146.102	8.000	14.06	122	1.4	2.5	2.5	0.87	5.9	1.7	CI
891207	64559.422		14.06	91	1.2	1.2	1.2	1.06	6.5	4.2	CI
891221	60542.517		19.69	76	0.6	0.9	1.1	0.90	7.9	3.8	CHI
900101	65452.923		16.62	74	9.6	10.4	6.1	1.06	0.8	0.5	BI
900520A	44296.132	0.125	11.21	76	4.8	2.4	2.4	1.12	0.5	0.3	C
900520B	74162.395		16.88	81	0.8	1.3	1.7	0.27	7.7	2.5	ADI
900604	62527.704	4.000	8.44	92	1.9	1.3	0.8	0.83	6.0	0.3	CI
900607	64411.936		16.82	98	6.4	7.7	4.4	1.08	6.4	1.2	BI
900614	32625.983		19.69	85	1.8	3.4	2.8	0.85	4.8	2.2	BI
900618	83096.144		28.13	74	0.7	1.0	1.7	0.38	16.3	9.7	BD
900808	15363.414	0.500	9.07	79	62.9	117.1	169.4	1.00	7.2	2.3	C
900904	17393.973		28.13	73	0.7	1.0	1.0	0.22	22.1	7.7	BD
900906	25325.554	8.000	25.25	76	7.8	7.2	6.4	1.08	20.4	8.8	CI
900928	19490.338	0.500	16.87	75	2.5	1.7	1.8	1.12	2.7	1.6	C
901001	63235.175	4.000	25.31	75	0.6	1.0	1.3	0.38	20.9	3.8	CI
901009	1658.227		8.44	76	0.9	1.5	1.9	0.23	4.6	1.7	BDI
901014	4702.618		22.50	80	1.5	2.2	2.2	0.93	9.5	3.8	BI
901204	34690.572		14.06	81	1.3	1.7	1.5	1.12	6.8	2.4	BDI
901219	78324.797		19.69	81	1.1	1.8	2.4	0.55	14.8	6.0	BDI
901225	3515.809		5.63	80	1.5	1.0	0.7	0.96	2.2	0.3	BI
910122	54418.967	16.000	28.13	84	1.1	1.7	1.9	1.11	106.1	28.1	C
910208	32379.924		28.00	108	4.2	6.1	3.9	1.11	1.0	0.6	A
910219	42658.298	16.000	19.69	81	1.8	1.8	1.9	0.91	69.7	55.1	CI
910310	47568.096	16.000	28.13	100	1.2	2.1	2.2	0.38	34.6	16.0	C
910414	26604.970	16.000	5.63	92	1.2	0.9	0.5	0.71	0.3	0.2	CI
910417	72130.142		16.88	92	1.0	1.0	1.1	0.84	14.5	5.8	BDI
910428	20865.801		28.13	85	1.2	1.7	2.9	0.95	20.1	7.5	BD
910522	43980.082	16.000	11.25	342	0.5	0.9	1.0	0.80	5.4	2.3	CHG
910529	45872.576	16.000	19.69	93	2.1	3.5	2.9	1.12	5.9	2.6	C
910717	16420.404	16.000	11.25	90	0.8	1.0	1.1	0.48	21.1	2.7	CG
910814	69397.176		28.13	80	1.4	2.3	2.0	0.18	22.3	11.1	BDG
911018	20136.770	16.000	14.06	87	1.5	1.7	1.7	0.77	4.1	1.0	CI
911027	7526.385		28.13	89	1.7	2.8	4.9	1.12	111.0	61.1	CDEH
911104	54044.983		5.63	87	1.0	0.8	0.8	0.62	2.6	0.4	BDGI
911109	12345.946		8.44	87	0.9	0.9	0.9	1.05	2.6	0.8	CGH
911118	67912.630		28.13	91	1.6	2.9	4.8	1.09	13.1	4.3	BG
911126	45816.946	8.000	14.06	90	0.6	1.1	1.5	0.03	91.6	39.3	CGI
911202	73363.547	8.000	8.44	94	0.8	1.2	1.5	0.99	3.9	2.1	CGI
911226B	2754.902		19.67	90	4.6	7.7	9.1	1.07	8.1	3.5	B
911226A	38731.772		8.10	90	7.9	13.6	21.9	1.05	4.9	2.2	BDEI

Date	UT	$\Delta T_{\mathrm{RT}}$	$T_{\mathrm{MRO}}$	Bkg	1/4 s	1 s	4 s	TE	$T_{90}$	$T_{50}$	Notes
920212	15630.702		25.52	94	12.6	23.1	36.4	1.00	14.0	4.7	B
920226	29339.015		8.44	99	0.9	1.2	1.2	0.72	2.8	1.7	BDG
920311	8887.280	0.375	28.13	102	1.9	2.9	4.3	1.12	16.7	7.0	CG
920325	61525.530	16.000	11.25	99	1.2	1.0	0.7	0.81	52.8	24.9	C
920406	9756.428		22.50	105	2.5	4.1	4.5	1.11	17.2	4.0	CG
920414	84166.415		8.44	102	0.9	1.1	0.7	0.10	3.0	0.5	BDG
920419	4180.082		5.63	101	1.0	1.4	1.0	0.16	1.6	0.7	BD
920426	3956.730		28.13	103	0.6	0.9	1.4	0.19	20.0	8.8	BDH
920501	76840.660		28.13	107	1.4	1.3	2.1	1.13	17.8	6.9	BD
920517	12672.789	16.000	16.88	100	2.3	2.2	2.4	1.13	8.0	1.3	CG
920519	59211.868		28.13	102	0.9	1.4	1.4	0.50	20.7	15.9	BD
920525	12881.961	16.000	22.50	110	2.3	3.6	2.4	1.13	13.7	9.2	CG
920711	58076.640		28.13	108	1.2	2.1	2.5	0.66	23.5	9.0	BD
920720	11155.341	8.000	11.25	112	1.2	1.3	1.2	1.12	7.7	4.5	CG
920723	72694.102		19.55	109	6.0	9.6	9.8	1.10	4.8	2.5	B
920731	61857.429		28.13	110	1.0	1.4	1.7	0.94	24.3	18.3	BD
921004	49963.747		28.11	107	3.8	6.4	5.6	1.10	12.1	8.8	B

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
780914	25.1	3.57	23.0	24.5	3.02	2.74	1.5	0.68	2.0
780918	55.5	8.62	36.6	51.5	3.70	3.46	1.9	0.44	4.8
780921	44.0	3.45	14.7	34.8	0.91	1.18	4.1	1.68	8.6
781019	31.8	5.70	36.0	36.8	1.09	1.42	1.4	0.49	11.8
781104	112.8	36.61	48.7	89.2	6.73	9.30	3.3	0.60	13.2
781115	41.8	5.22	24.4	33.9	0.95	1.28	2.9	1.01	12.7
781119	117.6	39.16	32.1	93.0	4.17	8.66	3.9	0.69	31.5
781121	27.3	37.46	40.5	39.3	13.83	15.79	1.3	0.44	5.6
781124	76.1	4.73	97.8	100.6	2.05	2.07	1.5	0.29	4.4
790113	85.4	16.36	104.2	105.9	9.75	9.55	1.2	0.22	3.1
790305	2502.0	43.16	3043.0	3119.0	52.80	46.01	1.3	0.03	1.6
790307	76.1	43.80	50.7	61.9	9.73	12.56	2.1	0.42	10.4
790313	42.7	9.87	32.9	43.9	3.13	3.55	2.2	0.68	6.5
790325	34.0	10.51	24.8	33.6	3.43	4.08	2.2	0.81	6.6
790329	23.9	10.26	16.6	20.6	2.94	3.55	1.8	0.91	7.4
790331	27.4	3.00	51.2	44.1	1.32	1.35	0.8	0.28	4.7
790402	26.2	14.67	14.0	20.7	2.21	3.24	2.1	0.88	16.4
790406	58.9	0.91	35.2	54.5	0.09	0.20	2.1	0.61	28.5
790412	16.4	7.23	31.8	15.2	3.95	4.30	1.2	0.50	3.7
790418	78.1	13.31	30.9	61.8	2.81	3.73	2.8	0.57	10.7
790419	32.9	30.95	25.9	29.6	9.82	10.05	1.7	0.57	6.5
790502	31.8	4.30	41.1	40.6	1.61	1.63	1.3	0.39	5.8
790509	35.1	0.85	12.1	27.8	0.09	0.19	3.6	1.83	31.4
790613	29.3	0.64	6.9	23.1	0.04	0.14	6.9	5.38	92.5
790622	39.5	27.21	22.0	34.5	6.11	7.40	3.4	1.22	9.6
790626	53.5	2.22	59.4	65.7	1.61	1.49	1.7	0.39	2.8
790628A	16.7	0.72	9.7	13.2	1.90	1.81	3.8	3.47	0.5
790628B	9.7	2.67	13.2	7.8	0.75	0.59	1.7	1.25	8.2
790731	19.7	14.05	13.9	18.8	3.85	4.20	2.5	1.69	7.6
791014	14.8	2.67	4.0	11.7	9.17	14.10	3.4	2.92	0.5
791031	15.7	4.03	24.6	22.8	2.71	2.75	0.9	0.50	2.8
791101	27.4	18.39	19.6	21.6	4.81	6.05	1.9	0.99	8.4
791105	22.0	0.53	19.0	22.2	0.40	0.41	1.4	0.66	2.4
791109	19.4	1.09	16.6	20.6	0.63	0.38	1.8	0.82	4.1
791111	21.6	3.19	19.1	22.5	1.02	1.16	1.6	0.65	6.6
791115	81.1	27.89	35.2	64.1	5.05	6.64	3.1	0.66	12.8
791116	109.6	34.19	51.0	86.7	12.72	13.28	2.7	0.44	5.3
791119	19.4	0.13	24.0	15.3	0.21	0.18	1.6	0.84	2.8
791124	22.0	11.39	13.7	21.2	1.76	2.70	4.4	2.96	17.2
791206	28.5	1.57	13.0	23.5	0.31	0.43	3.8	1.85	11.3
791209	54.0	12.54	27.6	46.0	4.48	5.08	2.7	0.73	5.7
791220	40.8	12.90	28.9	36.8	4.33	5.02	2.2	0.80	6.2
800105	10.7	5.26	8.7	11.9	2.40	2.51	2.5	2.05	4.2

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
800213	116.3	72.44	63.4	94.5	18.42	21.61	2.4	0.38	8.6
800228	10.8	0.87	32.0	32.4	0.11	0.19	0.5	0.30	20.8
800322	82.1	7.14	72.9	88.6	1.78	2.30	1.7	0.29	9.0
800331	59.8	13.50	94.8	83.8	11.05	9.35	0.9	0.18	2.6
800408	35.6	0.82	11.3	28.1	0.12	0.20	3.1	1.25	19.4
800410	27.8	4.92	17.0	26.3	2.12	1.65	5.3	3.01	4.7
800412B	24.4	57.36	10.7	19.3	7.82	12.68	5.1	3.75	19.0
800412A	30.3	57.29	13.0	24.2	6.64	12.67	2.2	0.80	24.6
800417	88.7	9.01	89.9	98.2	2.69	3.09	1.8	0.29	6.9
800419	105.8	9.54	58.5	83.7	1.83	2.22	2.3	0.39	11.6
800512	26.1	21.01	11.6	20.6	2.51	4.65	3.1	1.56	23.6
800514	24.9	4.32	22.5	28.1	1.52	1.69	2.0	0.79	5.7
800524	20.3	6.95	19.7	22.5	1.91	2.14	1.4	0.64	7.7
800525	73.5	21.89	16.5	58.1	3.06	4.84	7.8	2.39	19.2
800602	91.8	27.22	45.1	72.6	4.83	6.76	2.7	0.51	13.6
800709A	53.8	19.43	43.8	56.5	5.43	6.55	2.1	0.65	7.7
800709B	32.8	9.36	34.0	37.3	3.45	2.64	1.3	0.39	5.7
800727	21.6	1.49	13.7	20.1	2.19	1.84	2.5	1.20	2.6
800806	108.1	2.09	96.3	111.5	0.83	0.83	1.6	0.25	4.9
801017	32.5	14.82	24.4	32.9	4.99	5.72	1.9	0.63	6.1
801119	23.6	4.69	23.4	27.6	0.96	1.25	1.7	0.66	11.2
801205	88.4	1.89	36.9	69.9	0.28	0.43	3.2	0.61	16.8
801210	69.6	14.97	35.8	57.2	3.40	4.27	2.8	0.60	10.0
801220	45.9	31.49	9.5	36.3	3.38	6.96	5.3	1.79	32.7
810101	28.2	4.22	25.3	32.0	1.16	1.49	2.5	0.94	8.4
810103	29.5	1.85	25.4	23.8	1.02	1.05	1.8	0.62	3.5
810129	27.3	26.02	16.9	21.6	3.54	5.75	2.4	0.98	19.8
810214	50.1	13.89	42.2	52.7	5.83	6.36	1.8	0.44	4.8
810228	43.3	19.51	38.8	41.1	6.14	7.03	1.6	0.40	6.6
810424	73.7	8.59	43.2	58.3	2.03	2.38	2.2	0.42	9.0
810511	43.8	6.17	13.1	34.6	0.78	1.36	2.9	1.02	23.2
810605	68.8	24.54	36.4	59.2	5.22	6.70	2.7	0.62	10.5
810611	21.0	6.05	19.7	22.8	2.00	2.27	2.1	0.98	6.2
810709	37.4	0.66	48.1	49.1	0.15	0.19	1.5	0.47	10.3
810721	26.0	17.17	23.0	20.6	2.53	3.87	1.8	0.69	17.0
810801	36.4	17.56	19.3	31.3	3.82	4.52	1.9	0.56	10.0
810805	25.2	1.97	23.2	28.7	1.15	1.13	1.9	0.75	3.3
810829	28.0	5.99	30.3	34.1	1.44	1.81	1.5	0.58	9.3
810902	66.2	16.90	61.0	75.3	4.66	5.66	2.5	0.50	8.0
810905	18.4	2.20	16.0	15.9	0.71	0.85	1.8	0.88	6.7
810906	29.3	21.09	26.8	30.9	7.26	5.59	2.2	0.84	6.1
810926	96.4	27.66	30.8	76.2	4.45	6.56	4.1	0.83	15.6
810930	66.3	9.11	31.4	53.9	2.23	2.78	2.4	0.53	9.0

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
811016	558.7	128.80	418.8	522.3	49.38	52.34	1.8	0.11	5.1
811209	24.3	2.25	24.0	27.0	1.68	1.58	2.2	0.88	2.5
811215	22.9	5.77	22.3	26.9	3.84	3.80	1.9	0.82	2.8
811225	23.3	4.04	18.5	24.2	2.08	1.87	2.0	0.82	3.9
811231B	27.0	7.14	40.0	33.9	1.67	2.08	0.9	0.34	9.8
811231A	101.9	2.35	25.6	80.6	0.20	0.52	2.9	0.55	42.3
820104	25.9	2.25	52.6	42.0	1.07	0.92	0.7	0.27	4.0
820118	52.3	3.99	10.0	41.3	1.08	1.19	5.6	1.85	7.8
820301	52.6	48.50	30.7	46.8	26.26	26.50	3.4	0.92	3.5
820302	36.1	2.61	16.0	28.6	0.36	0.58	3.8	1.52	19.6
820313	32.6	18.04	12.5	25.8	3.98	4.94	3.2	1.29	10.1
820320	54.1	38.24	22.4	42.8	5.04	8.45	3.3	1.66	20.9
820405	29.6	0.39	32.4	36.0	0.18	0.20	1.5	0.44	4.7
820406	108.5	14.81	27.8	85.8	2.42	3.58	4.7	0.89	15.6
820511	31.6	1.69	14.5	25.3	0.90	0.66	2.2	0.92	4.0
820519	138.3	4.54	47.5	109.3	0.44	1.00	4.1	0.60	37.4
820525	33.8	3.06	10.8	26.7	0.92	1.10	3.8	1.63	7.0
820802	31.0	8.84	25.0	31.8	1.46	2.15	3.0	1.17	15.0
820820	48.4	12.53	35.7	45.0	4.79	5.56	1.6	0.37	5.5
820825	41.7	9.89	43.3	49.2	3.78	4.23	2.5	0.73	5.3
820827	149.7	45.76	102.2	141.9	13.72	16.04	2.0	0.24	7.3
820828	28.7	6.78	27.3	32.7	1.65	1.97	1.8	0.59	9.0
821012	56.7	20.11	24.5	44.8	2.32	4.45	2.3	0.53	27.6
821015	37.9	1.14	10.0	30.0	0.14	0.25	3.6	1.20	23.1
821027	46.9	12.66	14.0	37.0	1.35	2.80	4.8	1.62	33.8
830108	28.5	3.51	19.8	22.5	0.77	1.00	1.9	0.84	10.3
830117	63.3	23.14	36.3	55.2	8.03	8.89	2.1	0.43	5.8
830126	57.7	16.25	24.8	46.5	5.17	5.74	2.8	0.67	6.3
830127	25.2	13.50	7.5	19.9	1.45	2.98	8.0	6.80	28.8
830210	44.5	10.36	29.9	40.2	2.60	3.34	1.9	0.49	9.0
830313	36.5	15.45	14.8	28.9	2.63	3.49	3.2	1.26	13.9
830321	31.1	1.58	37.4	38.5	0.60	0.64	1.5	0.45	5.0
830331	31.0	16.63	16.3	26.9	3.62	4.53	2.2	0.79	10.3
830411	36.8	29.31	26.5	37.4	6.40	8.09	2.8	1.06	10.2
830414	17.4	8.10	8.9	13.8	1.43	1.89	2.5	1.53	13.2
830518B	25.5	8.42	17.5	21.4	2.35	2.81	2.3	0.95	7.9
830518A	30.5	8.43	23.0	30.5	2.55	2.91	2.7	0.99	7.0
830522	155.9	3.39	66.1	123.3	0.32	0.75	3.3	0.49	40.3
830528	29.0	5.11	32.7	36.5	1.85	2.10	2.0	0.70	5.7
830604	28.9	5.29	11.7	22.8	2.51	2.61	2.6	1.05	4.0
830608	25.4	1.64	8.6	20.1	0.15	0.36	4.8	2.79	36.2
830610	67.5	19.93	33.1	53.4	3.70	5.20	2.6	0.56	13.2
831116	32.7	16.88	17.4	26.5	3.77	4.96	2.4	0.86	10.2

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
831119	41.8	4.62	41.0	47.9	2.12	2.06	2.4	0.72	4.3
831124	23.0	4.62	18.2	24.6	1.30	1.53	4.5	2.99	7.4
831130	33.3	49.21	23.5	32.7	15.07	17.40	2.3	0.88	6.7
831221	56.3	1.39	23.1	44.5	0.19	0.33	4.1	1.20	21.5
840110	39.6	12.63	22.9	31.3	1.25	2.79	2.4	0.71	34.5
840119	90.2	2.29	29.6	71.3	0.27	0.51	3.6	0.88	27.4
840222	43.0	3.22	36.7	47.3	0.88	1.07	2.0	0.55	7.9
840304	83.5	293.50	28.5	66.0	63.04	64.89	2.9	0.57	9.0
840425	24.7	10.27	24.0	19.5	1.35	2.27	1.6	0.79	21.1
840517	33.5	8.28	11.1	26.5	0.93	1.83	3.9	1.52	27.6
840518	29.0	1.05	101.1	77.0	1.04	0.99	0.4	0.17	1.7
840519	29.6	5.25	39.4	37.7	2.95	2.42	1.1	0.31	3.7
840524	69.7	1.57	23.0	55.1	0.27	0.35	4.0	1.11	16.0
840612	47.0	6.58	31.1	37.2	1.14	1.66	2.1	0.54	14.2
840805	99.0	81.61	42.8	78.3	12.60	18.04	3.1	0.58	17.8
840818	30.6	34.21	18.4	28.9	12.19	13.86	2.2	0.82	5.8
840820	105.7	40.99	45.4	83.6	8.46	11.16	2.8	0.47	11.8
840823	457.6	127.40	185.3	361.7	18.31	28.16	2.9	0.21	20.5
840902	39.6	1.72	14.5	31.3	0.24	0.38	3.3	1.24	18.7
840908	109.0	10.96	86.1	112.6	3.34	3.87	2.4	0.37	6.8
840916	27.7	5.59	20.0	28.0	1.68	1.75	2.7	1.15	6.8
840917	87.2	20.70	55.9	75.5	6.07	7.04	2.1	0.38	7.2
840921	81.8	44.06	17.9	64.7	4.30	9.74	5.8	1.46	37.0
841015	76.8	12.26	47.1	71.5	2.31	3.22	2.1	0.39	13.0
841114	44.6	14.58	29.2	43.3	2.20	3.39	2.7	0.87	18.0
841125	22.1	6.82	5.2	17.4	0.58	1.51	9.9	10.95	41.5
841209	46.6	5.98	10.9	36.9	1.02	1.53	5.2	2.06	14.7
841211	32.3	3.94	38.0	38.5	1.13	1.27	1.5	0.44	7.3
841215	952.7	28.78	302.1	753.1	3.52	6.36	3.8	0.18	28.3
850227	61.1	16.84	27.5	48.3	2.84	3.84	2.8	0.69	14.1
850306	19.2	8.07	40.7	16.5	1.93	2.43	1.1	0.45	9.1
850318	146.8	32.60	46.3	116.0	3.10	7.21	4.0	0.64	39.5
850404	42.5	14.17	34.9	44.1	5.93	3.55	1.8	0.54	5.2
850423	24.0	5.24	12.6	22.2	0.93	1.36	4.3	2.56	13.7
850517	20.5	13.42	8.7	17.1	2.44	3.46	3.1	1.92	13.1
850601	97.2	2.15	53.5	76.8	0.49	0.58	2.6	0.52	9.5
850610	46.8	16.99	20.4	37.0	2.59	3.77	3.2	1.09	16.3
850615	139.2	5.47	138.6	150.7	1.66	1.67	1.4	0.18	6.7
850624	157.0	228.10	45.5	124.2	24.00	50.42	4.1	0.61	36.1
850711	26.7	8.78	6.1	21.1	0.95	1.94	11.9	14.28	29.8
850712	23.5	9.23	4.2	18.5	1.57	2.38	5.2	3.95	14.9
850718	60.5	0.93	24.1	47.8	0.02	0.21	3.0	1.30	492.5
850719	26.6	8.86	34.8	34.2	1.54	2.30	1.2	0.55	14.6

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
850805	136.6	43.04	29.8	108.0	5.23	9.51	4.6	0.77	25.1
850811	34.8	6.98	19.5	28.1	1.79	2.19	1.9	0.67	8.3
850820	71.2	10.27	27.0	56.3	2.18	2.68	3.9	1.02	10.3
850826	32.2	3.52	10.6	25.5	0.72	0.96	2.5	0.95	11.0
850907	28.0	5.81	18.1	22.1	0.78	1.29	2.0	0.84	19.4
850922	27.4	12.92	22.9	26.3	4.10	4.57	1.9	0.79	6.4
850927	69.5	73.30	21.4	54.9	9.64	16.20	4.2	1.28	22.3
851017	30.1	5.31	9.5	23.8	0.41	1.17	4.1	2.21	49.5
851029	24.5	4.74	23.6	19.3	0.55	1.05	1.8	0.84	25.8
860115	38.4	3.02	62.0	35.4	1.08	1.08	1.2	0.34	5.6
860128	25.3	3.37	19.8	21.0	1.09	1.22	1.9	0.92	6.3
860311	133.3	107.20	53.4	105.3	15.69	23.70	3.2	0.52	19.2
860331	27.0	3.42	29.9	32.5	1.60	1.60	1.3	0.52	4.1
860502	31.9	0.76	3.6	25.2	0.03	0.17	5.6	4.79	144.7
860517	107.7	38.21	38.2	85.1	4.57	8.45	3.5	0.68	24.6
860522	70.5	63.18	27.3	55.7	7.55	13.97	3.8	1.09	24.4
860525	34.5	10.65	20.4	28.0	2.03	2.69	2.6	1.01	11.9
860530	27.6	2.86	17.6	25.9	0.74	0.97	1.7	0.66	8.9
860712	32.2	9.80	10.3	25.5	1.14	2.17	7.7	6.69	25.6
860919	36.1	8.74	17.1	30.1	2.04	2.53	2.2	0.77	9.2
861002	185.3	28.27	67.1	146.5	4.94	6.95	2.9	0.36	13.7
861030	31.6	4.81	27.6	34.7	0.88	1.27	2.0	0.86	12.8
861206	35.6	11.54	35.1	41.5	1.82	2.81	1.8	0.58	16.3
861211	35.0	0.70	5.6	27.6	0.03	0.15	3.8	2.20	130.1
861223	32.1	6.29	13.0	25.4	1.47	1.77	4.0	2.46	9.2
870121	31.2	5.47	20.9	30.8	1.38	1.74	2.6	1.22	8.6
870224	24.0	19.04	9.0	18.9	3.80	4.38	4.6	3.85	10.9
870315	33.4	5.87	28.5	33.9	3.44	3.32	2.1	0.88	3.1
870401	45.8	6.71	53.7	56.7	3.51	2.62	1.3	0.36	4.0
870408	40.6	9.83	17.7	32.4	1.72	2.61	2.9	1.13	14.6
870608	580.4	41.60	357.9	521.6	10.45	12.90	2.4	0.14	9.4
870609	38.5	71.08	19.8	34.4	7.35	15.71	2.0	0.61	32.0
870621	18.6	13.72	11.3	14.7	8.11	6.98	3.0	2.63	3.5
870623	33.3	9.42	25.9	26.3	0.98	2.08	2.1	0.84	30.5
870719	97.1	54.16	156.2	134.9	31.42	26.74	0.9	0.14	3.5
870810	241.4	53.50	107.8	191.4	8.66	12.47	3.5	0.38	16.0
870904	67.2	12.61	25.3	53.2	1.63	2.79	4.4	1.36	21.3
870909	29.2	6.44	15.1	25.6	1.43	1.59	2.3	0.89	9.6
870911	21.9	7.61	8.7	17.3	1.89	2.15	9.2	15.53	8.5
871031	30.6	1.51	56.7	49.5	1.55	1.46	0.8	0.28	1.6
871203	31.3	8.28	13.4	25.2	2.69	3.12	4.1	2.60	6.4
871213	47.7	2.97	36.9	47.7	3.14	2.02	1.8	0.53	2.8
880111A	45.9	13.35	31.5	36.3	1.41	2.95	1.8	0.47	29.7

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
880111B	29.9	2.69	24.4	32.9	0.22	0.59	3.2	1.36	41.3
880128	113.8	45.14	35.0	90.0	5.21	9.98	4.9	1.05	28.9
880205	44.5	45.46	11.4	35.2	3.35	10.05	3.2	1.12	58.4
880301	28.9	4.44	20.5	22.8	0.69	0.98	2.2	0.94	15.8
880310	67.0	21.73	26.8	53.0	3.70	5.06	3.5	1.00	14.0
880311	427.3	119.20	220.9	353.5	20.90	28.57	3.1	0.23	14.9
880318	47.6	24.65	9.7	37.6	2.05	5.45	6.5	3.06	51.2
880320	40.2	2.92	25.0	31.8	0.21	0.65	2.6	0.78	56.8
880406	102.0	35.01	23.5	80.6	3.84	7.74	5.1	1.09	28.4
880408	48.3	11.09	59.1	57.6	5.61	4.88	1.2	0.31	4.0
880514	68.2	21.08	32.8	55.3	4.74	6.26	3.0	0.76	10.2
880619	31.9	23.25	20.9	30.7	4.32	5.53	2.4	0.98	12.3
880721	41.6	23.87	24.0	38.2	6.80	7.71	2.7	0.87	7.3
880810	69.2	21.73	18.9	54.7	1.72	4.80	5.7	1.83	50.8
880901	73.3	12.26	163.8	134.2	13.38	12.33	0.7	0.12	1.5
880925	68.9	42.43	31.0	54.5	9.37	10.93	2.2	0.48	9.8
881007	26.3	5.87	64.4	52.1	6.78	6.26	0.6	0.23	1.4
881022	28.9	7.16	14.3	22.8	0.92	1.60	3.2	1.38	22.4
881024B	57.2	5.99	132.9	109.3	8.48	7.61	0.6	0.13	1.1
881024A	182.7	15.42	28.7	144.4	1.09	3.41	4.8	0.64	85.3
881117	91.9	2.20	45.8	72.7	0.36	0.49	2.9	0.57	18.0
881210	29.3	6.77	8.6	23.2	1.24	1.75	9.5	10.24	13.1
890108	40.5	19.67	21.1	33.8	3.68	5.08	2.5	0.78	13.2
890130	25.2	10.42	24.5	21.0	3.29	3.11	1.6	0.65	6.4
890215	236.5	154.50	77.6	186.9	21.54	34.16	3.6	0.39	21.9
890216	26.1	8.06	13.2	22.0	1.13	1.78	3.0	1.65	18.6
890218	40.0	15.71	14.0	31.6	2.51	3.72	2.3	0.68	15.9
890223	40.0	15.06	23.5	31.6	1.26	3.33	2.2	0.71	49.2
890228	150.2	46.52	58.9	118.7	5.36	10.28	3.0	0.44	29.6
890306	54.5	22.41	15.1	43.1	2.64	4.95	4.0	1.68	24.0
890310	23.4	4.63	100.0	72.3	6.60	5.95	0.4	0.21	1.1
890315	31.9	1.89	2.9	25.3	0.14	0.42	3.2	1.28	55.6
890430	133.8	78.95	71.5	111.3	14.82	18.64	3.0	0.45	12.6
890529	35.0	13.33	37.1	38.7	3.97	4.44	1.6	0.46	6.7
890620B	28.9	0.52	31.5	25.1	0.12	0.12	1.5	0.58	9.1
890620A	48.8	3.10	37.6	45.4	1.49	1.67	1.9	0.46	4.3
890626	34.0	6.78	30.8	38.7	1.65	2.10	3.0	1.00	9.5
890703	159.3	60.13	249.9	164.4	29.39	27.64	1.2	0.13	4.2
890704	21.1	0.44	33.7	32.5	1.22	1.25	1.3	0.59	0.5
890706	55.3	1.03	36.3	44.3	0.14	0.23	2.4	0.53	20.0
890710	111.9	2.06	47.3	88.5	0.31	0.46	3.3	0.58	16.2
890713	61.2	36.92	16.1	48.4	5.07	8.16	5.6	1.56	21.1
890801	29.7	2.64	36.0	37.2	4.80	3.95	1.3	0.31	1.1

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
890828	205.2	51.13	103.7	162.2	9.05	12.23	2.5	0.30	13.7
890915	65.5	17.68	39.3	55.4	4.13	5.13	2.3	0.53	9.4
890923	224.1	9.33	481.9	389.6	11.08	10.14	0.7	0.07	1.4
891012	43.3	8.54	23.9	34.2	1.61	2.05	2.4	0.73	12.1
891207	29.2	1.58	39.9	39.8	2.19	1.98	1.3	0.42	1.3
891221	16.6	2.39	33.6	27.8	0.91	1.02	0.7	0.36	5.4
900101	232.6	6.12	255.0	273.6	3.38	3.44	1.5	0.14	3.4
900520A	103.7	4.26	45.5	82.0	0.56	0.94	4.0	0.68	22.5
900520B	18.2	4.30	15.3	20.3	0.96	1.18	3.7	2.12	10.0
900604	49.1	1.95	15.0	38.8	0.16	0.43	3.4	1.04	52.4
900607	165.3	7.54	125.3	160.8	4.11	3.61	1.9	0.21	3.7
900614	43.7	10.25	21.7	34.6	1.63	2.27	3.7	1.18	15.5
900618	17.8	6.40	18.4	21.1	1.86	2.23	1.5	0.75	7.5
900808	1307.0	380.40	492.8	1033.0	67.24	84.10	3.5	0.14	13.9
900904	20.1	2.70	16.0	17.8	1.51	1.50	1.8	0.81	3.3
900906	171.5	22.06	117.5	150.6	9.52	9.89	1.9	0.23	4.4
900928	58.8	2.65	46.0	56.8	0.86	0.73	1.7	0.38	6.2
901001	16.7	3.46	18.7	20.8	1.08	1.19	1.6	0.85	6.5
901009	20.9	4.06	15.7	18.4	0.72	0.93	2.6	1.20	13.4
901014	37.1	5.99	28.3	36.0	2.06	2.27	3.1	1.01	5.9
901204	29.6	3.12	45.3	40.9	1.63	1.66	1.0	0.32	3.8
901219	26.6	9.11	16.9	25.7	2.70	3.00	2.5	0.93	6.9
901225	33.2	0.77	38.1	30.4	0.41	0.40	1.4	0.38	3.3
910122	27.0	10.51	43.4	41.0	16.46	13.54	1.3	0.34	2.0
910208	129.3	8.27	37.2	102.2	0.84	1.83	4.0	0.73	38.7
910219	41.5	10.95	25.6	37.4	2.60	3.05	2.8	0.86	9.1
910310	32.7	14.92	13.4	25.9	6.28	5.89	5.6	2.52	4.6
910414	41.2	1.01	14.7	32.6	0.13	0.22	5.5	2.80	24.1
910417	24.6	4.96	30.7	24.3	1.52	1.77	1.3	0.46	6.9
910428	27.1	13.63	36.4	30.8	4.88	5.38	1.1	0.33	5.6
910522	36.3	-11.38	21.3	29.3	-6.50	-6.85	1.8	0.86	3.4
910529	54.2	6.94	52.0	59.7	4.28	4.15	1.5	0.34	3.2
910717	19.0	1.18	20.0	21.4	1.54	1.23	1.7	0.68	2.3
910814	29.3	14.58	9.0	23.1	1.86	3.22	6.9	4.18	23.7
911018	39.4	3.41	18.4	31.2	0.92	0.89	2.6	0.86	7.5
911027	40.5	63.08	78.0	46.4	42.73	34.30	0.9	0.22	3.2
911104	23.4	1.27	18.6	25.5	0.28	0.37	3.4	1.82	10.1
911109	25.8	1.45	40.6	37.4	0.65	0.33	1.0	0.38	4.9
911118	40.6	12.35	38.5	43.9	5.44	5.71	1.3	0.34	4.4
911126	17.2	7.53	7.1	13.6	1.14	1.89	6.6	7.53	17.2
911202	20.3	3.28	39.5	32.3	0.46	0.72	0.7	0.30	18.6
911226B	102.6	21.83	255.1	140.2	13.33	9.75	0.9	0.12	3.8
911226A	198.3	22.62	411.0	325.0	21.13	18.48	0.7	0.07	2.2

Date	$P_P$	$S_P$	$P_B$	$S_B$	$P_T$	$S_T$	HRP	${\sigma }_{\mathrm{HR}}$	HRS
920212	323.0	69.03	640.3	531.0	71.59	63.69	0.7	0.06	1.8
920226	23.9	2.13	21.3	26.2	0.59	0.73	2.2	0.99	8.2
920311	53.2	18.97	49.0	58.1	5.08	6.10	1.7	0.40	8.0
920325	39.3	5.26	18.5	32.5	1.24	1.54	2.8	0.97	9.0
920406	72.3	20.63	66.7	79.3	5.56	6.56	1.7	0.33	8.0
920414	22.0	1.42	10.4	18.2	0.40	0.36	1.9	0.87	7.1
920419	26.8	2.18	10.1	21.2	0.21	0.48	3.1	1.45	36.5
920426	15.6	5.59	20.3	12.4	2.27	2.41	1.5	0.81	4.9
920501	38.6	8.65	48.6	48.5	4.11	4.28	1.2	0.30	4.1
920517	61.5	5.63	43.4	54.8	1.90	2.06	2.4	0.54	6.1
920519	27.9	10.38	17.1	24.7	2.14	2.89	2.5	1.00	11.4
920525	61.5	13.79	44.2	50.6	3.31	3.95	2.0	0.40	9.0
920711	33.5	17.80	18.6	26.9	3.11	4.48	3.4	1.43	14.4
920720	37.9	3.55	40.3	45.8	1.38	1.41	1.9	0.65	5.1
920723	158.1	33.59	64.1	125.0	4.69	7.43	3.6	0.50	20.2
920731	34.4	12.48	29.1	36.9	4.09	4.74	1.9	0.60	6.4
921004	108.4	18.26	90.3	110.1	5.07	6.03	2.0	0.30	7.7

Equations

$$\varphi (E)=E^{-1}\exp (E/E_0),$$

$$\varphi (E)={\varphi }_0{E}^{\alpha }\exp (-E/E_0)\mathrm{if}(\alpha -\beta )E_0>E$$

$$~{}~{}~{}~{}~{}~{}=\phi_{0}\big{[}(\alpha-\beta)E_{0}\big{]}^{\alpha-\beta}\exp(\beta-\alpha)E^{\beta}~{}~{}~{}~{}~{}~{}~{}~{}~{}{\rm if}(\alpha-\beta)E_{0}<E~{},$$

Full text

1 INTRODUCTION

The discovery of gamma-ray bursts (GRBs, Klebesadel et al. 1973) led to decades of intense study to determine their nature. The Burst And Transient Source Experiment (BATSE) showed that the distribution of GRBs is isotropic yet inhomogeneous implying that they are further away than typical galactic distances. The discovery of optical transients associated with the bursts (Costa et al, 1997) settled that the bursts came from far away galaxies.

The log $N$-log $P$ distribution is a statistical vehicle for estimating the homogeneity of the spatial distribution of GRBS. Here, $P$ is some measure of the event’s brightness (e.g., the peak photons cm*-2* s*-1*) and $N$ is the integral number of observed events brighter than $P$. It is assumed that $P$ is a standard candle such that the brightness of events further away scale as $R^{-2}$ where $R$ is the distance to the events. Since the number of events assuming a homogeneous distribution scales as $R^{3}$, the log $N$-log $P$ distribution is expected to be a -3/2 power law ($N\propto P^{-3/2}$). For events that are very far away, the expansion of the universe shifts the spectrum out of the instrument’s bandpass and affects the apparent density of events resulting in a log $N$-log $P$ distribution which deviates from the -3/2 power law even for a homogeneous distribution. The degree of deviation can be used to estimate the distance to the events. Unfortunately, there is no reason to believe any particular measure of $P$ is, indeed, a standard candle. It is likely that source evolution and/or an intrinsic luminosity function also affects the distance determination.

In this paper, we present a catalog of GRBs observed by the Pioneer Venus Orbiter (PVO) gamma-ray burst detector. The emphasis is on providing information that can be combined with other data to produce a combined log $N$-log $P$ distribution with a large dynamic range. The large exposure factor for PVO ($\sim 145$ yr steradian) but small size (22 cm2) complements BATSE’s small exposure factor (16.8 yr ster) and large size (2000 cm2). BATSE detects the most distant, faint but numerous events whereas PVO observes the rare bright events. It would take a BATSE-like experiment 30 years to detect as many bright events as contained in this catalog. PVO establishes a log $N$-log $P$ distribution consistent with a -3/2 power law.

2 INSTRUMENTATION

The PVO instrumentation (Klebesadel et al. 1980) consists of two CsI detectors each 3.81 cm in diameter and 3.175 cm in length. A phoswich arrangement is used to reduce the background counting rate from particles. The primary shielding is a layer of 0.025 cm thick lead. The two detectors were mounted at opposite edges of the PVO satellite and the signals were added together. Usually, there is no knowledge of the angle of incidence of an event. However, due to the symmetry of the detectors, the effective area is very similar in all directions. PVO has four energy channels; 100-200, 200-500, 500-1000, and 1000-2000 keV. PVO has two basic types of data: “real time” (RT) data and “memory readout” (MRO) data. The RT data are available continuously whenever the satellite is being tracked ($\sim$ 57% of the time between Sept. 1978 and Jan. 1992). The temporal resolution of the RT data varies depending on the telemetry rate. The RT data contain high temporal resolution, full-energy-range samples (100-2000 keV) and the four energy-resolved channels at a lower temporal rate. There are four full-energy-range samples for each set of energy-resolved channels. For example, during $\sim$ 12% of the time, PVO had a resolution of 0.125 s in the full-energy-range and 0.5 s for the four energy channels. Nearer the end of the mission, more time was spent with longer accumulations (e.g., 8 s for the full energy range).

Statistically significant variations in the counting rate cause data to be stored in a special memory with higher time resolution. This memory is usually read out once per day and is referred to as the Memory Readout (MRO) or “triggered” data. The default temporal resolution of the MRO data is 11.72 ms for the full energy range and 187.5 ms for the four-channel-spectral data. Roughly 240 full energy range samples ($\sim 2.8$ s) before the trigger and $\sim 2160$ samples (25.3 s) after the trigger are stored in the MRO.

3 Catalog of Triggered PVO GRBs

Tables 1 and 2 summarize the characteristics of 318 PVO triggered events. These results are based on a complete reanalysis of the each event so the values will differ from analyses prior to 1993. In particular, we have combined data from the RT and MRO data to obtain the best possible information. The following is a description of the columns in the tables.

The first two columns of Table 1 give the date and time of the event. When multiple events occur on the same day, the brightest is designated with an “A”, the second brightest with a “B”, etc. The time is the universal time of the trigger at Venus. The third column ($\Delta T_{\rm RT}$) is the temporal resolution of the RT full energy range channel in seconds. If this column is blank, then only MRO data are available.

The fourth column ($T_{\rm MRO}$) is the duration of the MRO record in seconds. The duration can be shorter than 28.1 sec because either time-to-spill shorten the record (for bright bursts), or the count rate satisfied the trigger-off criterion (for short bursts), or only some of the 10 MRO blocks were available (denoted by footnote I).

The fifth column (Bkg) presents the mean background counting rate in the full-energy-range channel in counts/sec. The next three columns give $C_{\rm max}/C_{\rm min}$ for the three trigger periods (1/4, 1, and 4 s). Values of $C_{\rm max}/C_{\rm min}$ greater than unity indicate that PVO would trigger on that time scale. When RT data are available, the telemetry includes a history of $C_{\rm min}$. The telemetry does not include values of $C_{\rm max}$ or identify which time period caused the trigger. These were estimated in the ground processing. For $C_{\rm max}$, we used the peak count rate over $\Delta T_{i}$ samples on the full energy range channel. Each $C_{\rm max}$ was calculated once per $\Delta T_{i}$. This introduces an uncertainty in the true $C_{\rm max}/C_{\rm min}$ since a different phase for $\Delta T_{i}$ could give a slightly different $C_{\rm max}$. For $C_{\rm min}$, we used $11.2(B\Delta T_{i})^{1/2}$ where Bkg is the third column of Table 1. The 11.2 is a trigger criterion parameter, effectively the trigger happens when a sample is 11.2 standard deviations different than the background.

In some cases, all three $C_{\rm max}/C_{\rm min}$ were less than unity indicating that the event should not have triggered PVO. This sometimes happens because of statistical variations or the unknown phasing of the $C_{\rm max}$ samples. There are a few cases (denoted by footnote F) where the threshold trigger criterion was commanded to be 5.6 rather than 11.2. The $C_{\rm max}/C_{\rm min}$ were calculated with 11.2 standard deviations in all cases to allow a uniform selection criterion.

The next two columns indicate the duration of the event in seconds. The $T_{90}$ and $T_{50}$ values are the time that contains 90% and 50% of the total counts in the full-energy-range channel.

Table 2 provides information on the intensities of the events in two energy bandpasses. The 100 to 2000 keV bandpass is best suited for studies that use only PVO data. Columns 2 and 3 use the energy range of PVO and are denoted with a subscript “P” for PVO. Columns 4 to 7 scale the fluxes to the energy range of BATSE (50 to 300 keV). Columns 4 and 5 use the Band spectral shape (Band et al, 1996) to estimate the fluxes in the 50 to 300 keV range and are denoted by the subscript ”B” for Band. Columns 6 and 7 use the thermal bremsstrahlung spectrum and are denoted by the subscript ”T”.

We provide peak values ($P$, in photons cm*-2* s*-1* above background, columns 2, 4, 6) evaluated for a sample interval of 250 ms and fluence ($S$, in $10^{-6}$ erg s*-1*, columns 3, 5, 7) values for the whole event. To determine the peak values, we first locate the peak in the full energy range channel with a sliding window of width 250 ms. We then prorate the nearest 187.5 ms spectral samples to obtain the count spectrum corresponding to the peak. Various spectral shapes are fit (with a $\chi^{2}$ statistic) to the count spectrum. The resulting best fit spectral shape is integrated over either 100 to 2000 keV or 50 to 300 keV to obtain $P$. The fluence is found in a similar manner except the count spectrum is the net counts above background. We have used two spectral shapes: classic thermal bremsstrahlung,

[TABLE]

and the Band et al. (1993) shape:

[TABLE]

[TABLE]

Both shapes give effectively the same PVO $P$ and $S$ values. In table 2, columns 2 and 3 give the $P_{\rm P}$ and $S_{\rm P}$ values for the 100 to 2000 keV bandpass based on the Band et al. (1993) shape. Since PVO only has four spectral channels, we fixed $E_{0}$ at 350 keV. Thus, there were three free parameters ($\phi_{0},~{}\alpha,~{}\beta$).

To obtain values suitable for comparisons to BATSE (50 to 300 keV), one must extrapolate the PVO spectrum. GRB spectra tend to change slope near 100 keV (see Band et al. 1993) so it is difficult to accurately obtain values for 50 to 300 keV from PVO. Equation 2 would do the same thing if $E_{0}$ is a free parameter. Thus, we fix $E_{0}$ to 350 keV. The resulting peak intensity ($P_{\rm B}$) is in column 4 of Table 2. Here, the subscript B indicates that the Band et al. (1993) spectral shape was used to evaluate the intensity. In column 6, we report $P_{\rm T}$, the peak intensity in 50 to 300 keV found using the thermal bremsstrahlung shape (eq. 1). The $P_{B}$ value probably gives a low estimate because the Band et al. (1993) can roll over more quickly than thermal bremsstrahlung. The thermal bremsstrahlung shape probably gives a high estimate because that shape cannot be flatter than $E^{-1}$ at low energy and sometimes GRB’s spectra are flatter. One could use the average of $P_{\rm B}$ and $P_{\rm T}$. Footnote D indicates when, in our judgment, the event burst data or background information was not complete enough to produce reliable intensities.

The next two columns give a hardness ratio and the associated statistical error. The hardness ratio HRP is based on the peak in the full-energy-range channel found with a sliding 250 ms sampling window. The error on HRP (i.e., $\sigma_{\rm HR}$) is based solely on Poisson statistics. The hardness ratio is defined to be the counts above 200 keV to the counts below 200 keV. The next column (HRS) is the hardness ratio for the whole burst. No statistical error is provided because the uncertainty is dominated by systematic effects such as the background determination or the length of the available data. These hardness ratios are provided only to give a rough indication of the spectral nature of the event.

4 THE LOG ${\bf N}$-LOG ${\bf P}$/LOG ${\bf S}$ DISTRIBUTIONS

Figure 1 shows the PVO log $N$-log $P$ distribution based on column 2 of Table 2. To produce a uniform distribution, we omitted the March 5th event and events with footnote D. The key issue regarding the PVO log $N$-log $P$ is how well it constrains the homogeneity of the local distribution. We compare the observed log $N$-log $P$  distribution to a power law ($N\propto P^{-\gamma}$) with a $\chi^{2}$ test. We only used events with $P>25$ photons cm*-2* s*-1* where the trigger efficiency is effectively unity. The best fit slope is -1.52. We estimate a confidence region on the slope with a Monte Carlo technique. We produce 5000 randomly generated log $N$-log $P$ distributions following $N\propto P^{-\gamma}$ and fit them to a -1.52 power law. We determine what fraction (as a function of $\gamma$) of the randomly generated data had a $\chi^{2}$ value as high as that observed with the actual data. The 68% confidence region is where the curves falls to $e^{-1/2}$ which occurs at $1.52\pm 0.15$.

Figure 2 gives the log $N$-log $S$ distribution. The log $N$-log $P$ follows the -3/2 power law for a wider range of observations because the instrument triggers on $P$.

5 SUMMARY

In this catalog we have redetermined all parameters using the most complete data that were available. We have found the peak intensity (over 250 ms) and total fluence three different way. The $P_{\rm P}$ and $S_{\rm P}$ in Table 2 are found by fitting the energy-resolved PVO data to the Band shape and integrating over the PVO energy range of 100 to 2000 keV. The $P_{\rm B}$ and $S_{\rm B}$ in Table 2 are found the same way except integrated over the BATSE energy range of 50 to 300 keV. The $P_{\rm T}$ and $S_{\rm T}$ in Table 2 use the thermal bremsstrahlung spectrum (instead of the Band spectrum) and the BATSE energy range. It is likely the the Band spectrum gives a low estimate and the thermal bremsstrahlung spectrum gives a high estimate so an average might be more accurate.

To combine two experiments such as PVO and BATSE, one must establish a common selection criterion and determine the exposure factors. Events are selected within the instruments based on the trigger criteria. The advantage of BATSE and PVO is that they both had very stable trigger criteria. BATSE triggers on timescales of 64, 256, and 1024 ms in the 50 to 300 keV range. PVO triggers on 250, 1000, and 4000 ms timescales in the 100 to 2000 keV range. Because both instruments trigger on (effectively) 1/4 and 1 s timescales, one would accept only events that have $C_{\rm max}/C_{\rm min}$ greater than unity on either of those timescales. In the case of PVO, one should exclude the March 5th 1979 event, events with footnote D, and events in 1992. In 1992, PVO was not tracked regularly and it is difficult to estimate the correct exposure factor for that year.

Fenimore et al (1993) used the PVO data from this catalog combined with BATSE with emphasis on the uniform selection of events. The uniform selection criteria, when applied to both PVO and BATSE, cut the number of useful events in about half. When uniformly selected, the BATSE data agrees with PVO to within the statistics. The combined log $N$-log $P$  distribution implies a standard candle luminosity of $6^{+1.3}_{-0.8}\times 10^{50}$ erg s*-1*.

This paper was drafted in 1993.

Table 1: Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Table 1 (continued): Properties of PVO GRBs

Footnotes: A: Portions of MRO used to determine background B: Background from non-simulataneous RT C: Background from near simulataneous RT D: Data availibility makes $T_{90}$ and $S$ unreliable E: Data availibility makes $P$ and $C_{\rm max}$ unreliable F: $\sigma_{t}$ set to 5.6 G: Also seen by BATSE H: Should not be used in Log $N$-Log $P$ I: MRO terminated early

Table 2: PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

Table 2 (continued): PVO GRBs Peak Luminosity and Fluence

References:

Band, D. L., et al. 1993, ApJ, 413, 281.

Costa, E., et al. 1997, Nature, 387, 783.

Fenimore, E. E., er al. 1993, Nature. 366, 40.

Klebesadel, R. W., Strong, I. B., and Olson, R. A., 1973, Ap. J. Letters 182, L85.

Klebesadel, R., Evans, W., Glore, J., Spalding, R., and Wymer, F., 1980 IEEE Trans on Geoscience and Remote Sensing, GE-18, 76.