Bulletin of the American Physical Society
2008 APS April Meeting and HEDP/HEDLA Meeting
Volume 53, Number 5
Friday–Tuesday, April 11–15, 2008; St. Louis, Missouri
Session M5: Recent Results in Gamma-Ray Astrophysics |
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Sponsoring Units: DAP Chair: Fiona Harrison, California Institute of Technologoy Room: Hyatt Regency St. Louis Riverfront (formerly Adam's Mark Hotel), Promenade C |
Sunday, April 13, 2008 3:30PM - 4:06PM |
M5.00001: Gamma-ray Observations of Extragalactic Particle Accelerators Invited Speaker: With the ground based VERITAS, MAGIC, MILAGRO, and HESS experiments and the upcoming space-borne GLAST observatory, we now have access to a powerful suite of telescopes to probe high-energy particle populations in a wide range of astrophysical systems. In this contribution, I discuss the science topics that can be addressed with observations of high-energy particles accelerated close to supermassive black holes, in normal and starburst galaxies, and by large scale structure formation shocks. Furthermore, I will highlight recent results obtained with ground based gamma-ray telescopes. [Preview Abstract] |
Sunday, April 13, 2008 4:06PM - 4:42PM |
M5.00002: The Gamma-ray Large Area Space Telescope (GLAST) Invited Speaker: The Gamma-ray Large Area Space Telescope, GLAST, is a mission to measure the cosmic gamma-ray flux in the energy range 20 MeV to $>$300 GeV, with supporting measurements for gamma-ray bursts from 8 keV to 30 MeV. The very large field of view will make it possible to observe 20\% of the sky at any instant, and the entire sky on a timescale of a few hours. With its upcoming launch, GLAST will open a new and important window on a wide variety of phenomena, including black holes and active galactic nuclei; the optical-UV extragalactic background light, gamma-ray bursts; the origin of cosmic rays and supernova remnants; and searches for hypothetical new phenomena such as supersymmetric dark matter annihilations and Lorentz invariance violation. In addition to the science opportunities, this talk includes a description of the instruments, the opportunities for guest investigators, and the mission status. [Preview Abstract] |
Sunday, April 13, 2008 4:42PM - 5:18PM |
M5.00003: Very High Energy Gamma Ray Astronomy. Invited Speaker: In the last decade the number of detected TeV gamma ray sources has gone up by more than an order of magnitude. This is due to the increased sensitivity of the current generation of telescopes. Imaging Atmospheric Cherenkov Telescopes such as HESS, Magic and VERITAS have exploited their high sensitivity and excellent angular resolution to discovered and map new classes of galactic gamma ray sources while continuing to discover and monitor extra-galactic AGN. In addition, Milagro, using water Cherenkov technology, has used its large field of view and continuous exposure to observe large scale diffuse emission from the Galactic plane and extended sources. In addition it has detected galactic sources with flat spectra extending beyond 100 TeV. The combination of these techniques are giving us a new view of the TeV sky and providing tantalizing evidence of the sources of Galactic cosmic rays. This talk will review recent results and discuss prospects for future detectors. [Preview Abstract] |
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