A joint H.E.S.S./MAGIC/VERITAS observation campaign on the radio galaxy M 87 to probe the origin of VHE {gamma}-raye mission
- Washington University in St. Louis, Physics Department and McDonnell Center for the Space Sciences, St. Louis, MO 63130 (United States)
- University of Utah, Salt Lake City, UT 84112 (United States)
- IFAE, Edifici Cn. Universitat Autonoma de Barcelona, 08193 Bellaterra (Barcelona) (Spain)
- MPI-K, Saupfercheckweg 1, 69117 Heidelberg (Germany)
- Max-Planck-Institut fuer Physik, Foehringer Ring 6, D-80805 Munich (Germany)
- Landessternwarte Heidelberg, Heidelberg (Germany)
The giant elliptical radio galaxy M 87 is the closest known extragalactic object emitting very-high-energy (VHE){gamma}-rays. The prominent jet of M 87 was extensively studied throughout the electromagnetic spectrum in the past revealing a complex structure resolved at radio, optical and X-ray energies. Knots in the jet indicate active regions, possibly associated with particle acceleration to ultra-relativistic energies. However, the origin of the measured VHE {gamma}-rays is still unknown. No clear correlation of the VHE {gamma}-rays with other wavelengths was found so far, whereas the size of the VHE emitting region is strongly constrained by the detection of variability on time-scales of days in 2005 and 2008. In a joint effort, H.E.S.S., MAGIC and VERITAS performed an intensive, coordinated monitoring campaign on M 87 in 2008 with a total coverage of >120 h of observation time. The motivation, coordination, results and implications for future campaigns are discussed.
- OSTI ID:
- 21255170
- Journal Information:
- AIP Conference Proceedings, Vol. 1085, Issue 1; Conference: 4. international meeting on high energy gamma-ray astronomy, Heidelberg (Germany), 7-11 Jul 2008; Other Information: DOI: 10.1063/1.3076732; (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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