Search for high‐energy gamma rays from an x‐ray–selected blazar sample
de la Calle Perez, I. Bond, I. H. Boyle, P. J. Bradbury, S. M. Buckley, J. H. Carter‐Lewis, D. A. Celik, O. Cui, W. Dowdall, C. Duke, C.
de la Calle Perez, I.
Bond, I. H.
Boyle, P. J.
Bradbury, S. M.
Buckley, J. H.
Carter‐Lewis, D. A.
Celik, O.
Cui, W.
Dowdall, C.
Duke, C.
Publication Date
2003-12-20
Keywords
bl lacertae objects : individual (rgb j0214+517, rgb j1117+202, rgb j1725+118, ies 0033+595, 1es 0120+340, 1es 0229+200, 1es 0806+524, 1es 1426+428, 1es 1553+113, 1es 1959+650), gamma rays : observations, active galactic nuclei, bl lacertae objects, tev energies, emission, radiation, telescope, flare, markarian-501, absorption, discovery
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Article
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Citation
de la Calle Perez, I. Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Buckley, J. H.; Carter‐Lewis, D. A.; Celik, O.; Cui, W.; Dowdall, C.; Duke, C.; Falcone, A.; Fegan, D. J.; Fegan, S. J.; Finley, J. P.; Fortson, L.; Gaidos, J. A.; Gibbs, K.; Gammell, S.; Hall, J.; Hall, T. A.; Hillas, A. M.; Holder, J.; Horan, D.; Jordan, M.; Kertzman, M.; Kieda, D.; Kildea, J.; Knapp, J.; Kosack, K.; Krawczynski, H.; Krennrich, F.; LeBohec, S.; Linton, E. T.; Lloyd‐Evans, J.; Moriarty, P.; Muller, D.; Nagai, T. N.; Ong, R. A.; Page, M.; Pallassini, R.; Petry, D.; Power‐Mooney, B.; Quinn, J.; Rebillot, P.; Reynolds, P. T.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; Swordy, S. P.; Vassiliev, V. V.; Wakely, S. P.; Walker, G.; Weekes, T. C. (2003). Search for high‐energy gamma rays from an x‐ray–selected blazar sample. The Astrophysical Journal 599 (2), 909-917
Abstract
Our understanding of blazars has been greatly increased in recent years by extensive multiwavelength observations, particularly in the radio, X-ray, and gamma-ray regions. Over the past decade the Whipple 10 m telescope has contributed to this with the detection of five BL Lacertae objects at very high gamma-ray energies. The combination of multiwavelength data has shown that blazars follow a well-defined sequence in terms of their broadband spectral properties. Together with providing constraints on emission models, this information has yielded a means by which potential sources of TeV emission may be identified and predictions made as to their possible gamma-ray flux. We have used the Whipple telescope to search for TeV gamma-ray emission from eight objects selected from a list of such candidates. No evidence has been found for very high energy emission from the objects in our sample, and upper limits have been derived for the mean gamma-ray flux above 390 GeV. These flux upper limits are compared with the model predictions, and the implications of our results for future observations are discussed.
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IOP Publishing
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Attribution-NonCommercial-NoDerivs 3.0 Ireland