VHE gamma-ray observations of Markarian 501

Whipple Collaboration; A. C. Breslin; I. H. Bond; S. M. Bradbury; J. H. Buckley; A. M. Burdett; M. J. Carson; D. A. Carter-Lewis; M. Catanese; M. F. Cawley; S. Dunlea; M. D'Vali; D. J. Fegan; S. J. Fegan; J. P. Finley; J. A. Gaidos; T. A. Hall; A. M. Hillas; D. Horan; J. Kildea; J. Knapp; F. Krennrich; S. LeBohec; R. W. Lessard; C. Masterson; B. McKernan; J. Quinn; H. J. Rose; F. W. Samuelson; G. H. Sembroski; V. V. Vassiliev; T. C. Weekes

arXiv · astro-ph/9906150

VHE gamma-ray observations of Markarian 501

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Abstract

Markarian 501, a nearby (z=0.033) X-ray selected BL Lacertae object, is a well established source of Very High Energy (VHE, E>=300 GeV) gamma rays. Dramatic variability in its gamma-ray emission on time-scales from years to as short as two hours has been detected. Multiwavelength observations have also revealed evidence that the VHE gamma-ray and hard X-ray fluxes may be correlated. Here we present results of observations made with the Whipple Collaboration's 10 m Atmospheric Cerenkov Imaging Telescope during 1999 and discuss them in the context of observations made on Markarian 501 during the period from 1996-1998.

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Whipple Collaboration, A. C. Breslin, I. H. Bond, S. M. Bradbury, J. H. Buckley, A. M. Burdett, M. J. Carson, D. A. Carter-Lewis, M. Catanese, M. F. Cawley, S. Dunlea, M. D'Vali, D. J. Fegan, S. J. Fegan, J. P. Finley, J. A. Gaidos, T. A. Hall, A. M. Hillas, D. Horan, J. Kildea, J. Knapp, F. Krennrich, S. LeBohec, R. W. Lessard, C. Masterson, B. McKernan, J. Quinn, H. J. Rose, F. W. Samuelson, G. H. Sembroski, V. V. Vassiliev, T. C. Weekes. 1999-06-08. VHE gamma-ray observations of Markarian 501. https://arxiv.org/abs/astro-ph/9906150

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