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25 April 2024

» arxiv » astro-ph/0403114

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High-Energy Gamma-Ray Observations of W Comae with STACEE
STACEE Collaboration: R. A. Scalzo ; L. M. Boone ; D. Bramel ; J. Carson ; C. E. Covault ; P. Fortin ; G. Gauthier ; D. M. Gingrich ; D. S. Hanna ; A. Jarvis ; J. Kildea ; T. Lindner ; C. Mueller ; R. Mukherjee ; R. A. Ong ; K. J. Ragan ; D. A. Williams ; J. A. Zweerink ;
Date:	4 Mar 2004
Journal:	Astrophys.J. 607 (2004) 778-787
Subject:	astro-ph
Abstract:	We report on observations of the blazar W Comae (ON+231) with the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE), a wavefront-sampling atmospheric Cherenkov telescope, in the spring of 2003. In a data set comprising 10.5 hours of ON-source observing time, we detect no significant emission from W Comae. We discuss the implications of our results in the context of the composition of the relativistic jet in W Comae, examining both leptonic and hadronic models for the jet. We derive 95% confidence level upper limits on the flux at the level of 1.5--3.5 x 10^{-10} cm^{-2} s^{-1} above 100 GeV for the leptonic models, or 0.5--1.1 x 10^{-10} cm^{-2} s^{-1} above 150 GeV for the hadronic models.
Source:	arXiv, astro-ph/0403114
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