VERITAS Observations of Mkn 501 in 2009
Dongqing Huang, Alexander Konopelko (Pittsburg State University) (for, the VERITAS collaboration)
TL;DR
This paper reports on VERITAS observations of Mkn 501 in 2009, revealing significant variability in TeV gamma-ray flux and spectrum, with some measurements exceeding 2 Crab, enhancing understanding of AGN emission behaviors.
Contribution
It provides the first detailed spectral and flux variability analysis of Mkn 501 during the 2009 season using VERITAS data.
Findings
Detected TeV gamma-ray flux exceeding 2 Crab
Observed spectral and flux variability in Mkn 501
Contributed to understanding of AGN gamma-ray emission
Abstract
VERITAS is the high-sensitivity instrument of latest generation. It is often used for the short AGN monitoring exposures evenly distributed over entire observational season of a source of interest. Each of these exposures is long enough to detect the source at the flux level of about 1 Crab. During the 2009 observing season a number of exposures of Mkn 501 with VERITAS revealed variable TeV gamma-ray emission at the flux level eventually exceeding 2 Crab. The spectral and flux variability measurements in TeV gamma rays for the 2009 data sample of Mkn 501 are summarized in this paper.
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Gamma-ray bursts and supernovae · Astrophysical Phenomena and Observations