The nature of gamma ray blazar candidate PMN J1326-5256
Hayley Bignall, Giuseppe Cimo, David Jauncey, Cliff Senkbeil, Jim, Lovell, Simon Ellingsen
TL;DR
This paper investigates the connection between gamma-ray blazar candidates and radio scintillation, highlighting PMN J1326-5256 as a potential counterpart to an unidentified gamma-ray source, with implications for future gamma-ray observations.
Contribution
It identifies PMN J1326-5256 as a likely gamma-ray blazar candidate exhibiting interstellar scintillation, linking radio variability to gamma-ray source identification.
Findings
PMN J1326-5256 shows significant interstellar scintillation.
PMN J1326-5256 is associated with the unidentified gamma-ray source 3EG J1316-5244.
Radio monitoring supports its candidacy as a gamma-ray blazar.
Abstract
A comparison of AGN detected at gamma ray energies by EGRET with flat-spectrum radio sources observed in surveys for intraday variability reveals that a remarkably high fraction of EGRET blazars show significant interstellar scintillation at centimetre wavelengths. Scintillating AGN will therefore be targets of interest for GLAST, scheduled for launch in early 2008. We suggest that the variable, scintillating flat-spectrum radio source PMN J1326-5256 is associated with the unidentified EGRET source 3EG J1316-5244. We describe the properties of PMN J1326-5256 and present recent results of monitoring with the ATCA and Ceduna radio telescopes.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Radio Astronomy Observations and Technology · Neutrino Physics Research