High-Energy Gamma-Ray Observations of W Comae with STACEE

Details High-Energy Gamma-Ray Observations of W Comae with STACEE High-Energy Gamma-Ray Observations of W Comae with STACEE

2004-03-04

arxiv.org/abs/astro-ph/0403114v1

Astrophys.J.607:778-787,2004

Astronomy and Astrophysics

Astrophysics

9 pages, 7 figures, uses emulateapj.sty. Accepted to ApJ

Scientific paper

10.1086/383534

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.

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