期刊
ASTROPHYSICAL JOURNAL
卷 599, 期 2, 页码 909-917出版社
IOP PUBLISHING LTD
DOI: 10.1086/379544
关键词
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
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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