Title of article
Very high energy observations of the BL Lac objects 3C 66A and OJ 287
Author/Authors
Lindner، نويسنده , , T. and Hanna، نويسنده , , D.S. and Kildea، نويسنده , , J. and Ball، نويسنده , , J. and Bramel، نويسنده , , D.A. and Carson، نويسنده , , J. and Covault، نويسنده , , C.E. and Driscoll، نويسنده , , D. and Fortin، نويسنده , , P. and Gingrich، نويسنده , , D.M. and Jarvis، نويسنده , , A. and Mueller، نويسنده , , C. and Mukherjee، نويسنده , , R. G. Ong Che، نويسنده , , R.A. and Ragan، نويسنده , , K. and Scalzo، نويسنده , , R.A. and Williams، نويسنده , , D.A. and Zweerink، نويسنده , , J.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2007
Pages
10
From page
338
To page
347
Abstract
Using the Solar Tower Atmospheric Cherenkov Effect Experiment (STACEE), we have observed the BL Lac objects 3C 66A and OJ 287. These are members of the class of low-frequency-peaked BL Lac objects (LBLs) and are two of the three LBLs predicted by Costamante and Ghisellini [L. Costamante, G. Ghisellini, Astron. Astrophys. 384 (2002) 56] to be potential sources of very high energy (>100 GeV) gamma-ray emission. The third candidate, BL Lacertae, has recently been detected by the MAGIC collaboration [J. Albert et al., arXiv:astro-ph/0703084v1 (2007)]. Our observations have not produced detections; we calculate a 99% CL upper limit of flux from 3C 66A of 0.15 Crab flux units and from OJ 287 our limit is 0.52 Crab. These limits assume a Crab-like energy spectrum with an effective energy threshold of 185 GeV.
Keywords
BL Lac objects , gamma rays , Observations
Journal title
Astroparticle Physics
Serial Year
2007
Journal title
Astroparticle Physics
Record number
1333367
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