Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..662..529m&link_type=abstract
GAMMA-RAY BURST AND AFTERGLOW ASTRONOMY 2001: A Workshop Celebrating the First Year of the HETE Mission. AIP Conference Proceed
Astronomy and Astrophysics
Astronomy
1
Gamma-Ray Sources, Gamma-Ray Bursts, Cherenkov Detectors, Observatories And Site Testing, Gamma-Ray
Scientific paper
The Milagro gamma-ray observatory employs a novel water Cherenkov detector to observe extended air showers produced by high energy particles impacting the earth's atmosphere. The detector consists of a large pond instrumented with an array of 723 photomultiplier tubes. The instrument operates 24 hours a day and continuously observes the entire overhead sky (~2 sr). Because of its wide field of view and high duty cycle Milagro is uniquely capable of searching for gamma-ray bursts. Milagro can play a role in the extension of the measured spectrum of prompt and afterglow emission to VHE energies (>500 GeV). Detection of VHE counterparts would place powerful constraints on GRB mechanisms, and because of their attenuation from pair production on background IR fields, provide an additional estimate of the source redshift when optical lines cannot be detected. More than 20 GRB have occured within the field of view of Milagro since observations began in January 2000. We describe the results of a search for VHE counterparts to these GRB.
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