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Whipple telescope observations of LS I +61 303: 2004–2006 |
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| Authors: | A. Smith R. W. Atkins S. Bradbury O. Celik Y. C. K. Chow P. Cogan C. Dowdall S. J. Fegan P. Fortin D. Gall G. H. Gillanders J. Grube K. J. Gutierrez T. A. Hall D. Hanna J. Holder D. Horan S. B. Hughes T. B. Humensky I. Jung P. Kaaret G. Kenny M. Kertzman D. B. Kieda A. Konopelko H. Krawczynski F. Krennrich M. J. Lang S. Le Bohec G. Maier J. Millis P. Moriarty R. A. Ong J. S. Perkins K. Ragan G. H. Sembroski J. A. Toner L. Valcarcel V. V. Vassiliev R. G. Wagner S. P. Wakely T. C. Weekes R. J. White D. A. Williams |
| Affiliation: | (1) School of Physics and Astronomy, University of Leeds, Leeds, UK;(2) Physics Department, University of Utah, Salt Lake City, USA;(3) Department of Physics and Astronomy, UCLA, Los Angeles, USA;(4) School of Physics, University College Dublin, Dublin, Ireland;(5) Department of Physics and Astronomy, Barnard College, Columbia University, New York, USA;(6) Department of Physics, Purdue University, West Lafayette, USA;(7) Physics Department, National University Ireland, Galway, Ireland;(8) Department of Physics, Washington University, St. Louis, USA;(9) Department of Physics and Astronomy, University of Arkansas at Little Rock, 2801 South University Avenue, Little Rock, AR 72204-1099, USA;(10) Physics Department, McGill University, Montreal, Canada;(11) Department of Physics and Astronomy, University of Delaware, Newark, USA;(12) Fred Lawrence Whipple Observatory, Harvard–Smithsonian Center for Astrophysics, Amado, USA;(13) Department of Physics and Astronomy, Iowa State University, Ames, USA;(14) Department of Physical and Life Sciences, Galway-Mayo Institute of Technology, Galway, Ireland;(15) Argonne National Laboratory, Argonne, USA;(16) Enrico Fermi Institute, University of Chicago, Chicago, USA;(17) SCIPP and Department of Physics, University of California, Santa Cruz, USA;(18) Department of Physics and Astronomy, DePauw University, Greencastle, USA |
| Abstract: | In this paper we present the results of the past two years observations on the galactic microquasar LS I +61 303 with the Whipple 10 m gamma-ray telescope. The recent MAGIC detection of the source between 200 GeV and 4 TeV suggests that the source is periodic with very high energy (VHE) gamma-ray emission linked to its orbital cycle. The entire 50-hour data set obtained with Whipple from 2004 to 2006 was analyzed with no reliable detection resulting. The upper limits obtained in the 2005–2006 season covered several of the same epochs as the MAGIC Telescope detections, albeit with lower sensitivity. Upper limits are placed on emission during the orbital phases of 0→0.1 and 0.8→1, phases which are not included in the MAGIC data set. |
| Keywords: | X-ray binary stars Gamma-ray sources Cherenkov detectors |
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