Physics
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop.1048t&link_type=abstract
ATNF proposal C1730, Semester: October, 2007
Physics
Extragalactic, Atca
Scientific paper
The Gamma-Ray Large Area Telescope (GLAST) is the next generation gamma-ray observatory, following on from the highly successful Energetic Gamma-Ray Experiment Telescope (EGRET). GLAST will likely be launched in early 2008 and a number of observational programs will provide support. We propose to monitor the AGN detected by GLAST at declinations south of -10 degrees over a number of years, starting with the sample of 33 southern AGN identified by EGRET. This sample will expand by one to two orders of magnitude as GLAST will detect weaker AGN than EGRET. Debate exists regarding the location of the gamma-ray emission region in AGN jets. Some limited evidence indicates that radio flares preceed gamma-ray flares, implying that the gamma-rays are produced in shocked regions of the jets, lightdays from the origin at the black hole/accretion disk. Long term monitoring with GLAST and the ATCA is the only way to explore the radio/gamma-ray flare relationship for a large Southern Hemipshere sample. Short radio wavelengths (7 and 12 mm) give access to the optically thin region of the AGN radio spectrum and thus allow a probe of emission from deep within the relativistic jet.
Edwards Philip
Gehrels Neil
Kadler Matthias
Lovell Jim
Murphy David
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