VERITAS Observations of the Microquasar Cygnus X-3

Abstract

We report results from TeV gamma-ray observations of the microquasar Cygnus X-3. The observations were made with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) over a time period from 2007 June 11 to 2011 November 28. VERITAS is most sensitive to gamma rays at energies between 85 GeV to 30 TeV. The effective exposure time amounts to a total of about 44 hours, with the observations covering six distinct radio/X-ray states of the object. No significant TeV gamma-ray emission was detected in any of the states, nor with all observations combined. The lack of a positive signal, especially in the states where GeV gamma rays were detected, places constraints on TeV gamma-ray production in Cygnus X-3. We discuss the implications of the results.

23 pages, 4 figures, 3 tables, accepted for publication in ApJ

References in corpus (6)

• Background Modelling in Very-High-Energy gamma-ray Astronomy
• Precise Gamma-Ray Timing and Radio Observations of 17 Fermi Gamma-Ray Pulsars
• VERITAS Observations of the gamma-Ray Binary LS I +61 303
• The nature of the hard state of Cygnus X-3
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• Microquasar Cyg X-3 -- a unique jet-wind neutrino factory?
• One of Everything: The Breakthrough Listen Exotica Catalog
• Broadband Emission Spectra from the Cygnus X-3 Jet in the Soft Spectral State
• HAWC Search for High-Mass Microquasars
• Long-term study of the gamma-ray emission of Cygnus X-3 with MAGIC and Fermi-LAT
• Extreme Transients in Gamma Rays