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

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 emiss...

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Bibliographic Details
Published in:arXiv.org 2004-03
Main Authors: Collaboration, STACEE, Scalzo, R A, Boone, L M, Bramel, D, Carson, J, Covault, C E, tin, P, Gauthier, G, Gingrich, D M, Hanna, D S, Jarvis, A, Kildea, J, Lindner, T, Mueller, C, Mukherjee, R, Ong, R A, Ragan, K J, Williams, D A, Zweerink, J A
Format: Article
Language:English
Subjects:
Atmospheric models
Confidence intervals
Gamma rays
Leptons
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0403114