Milagro: A TeV gamma-ray monitor of the Northern Hemisphere Sky

Type Conference Paper
Names B. L. Dingus, R. Atkins, W. Benbow, D. Berley, M. L. Chen, D. G. Coyne, D. E. Dorfan, R. W. Ellsworth, D. Evans, A. Falcone, L. Fleysher, R. Fleysher, G. Gisler, J. A. Goodman, T. J. Haines, C. M. Hoffman, S. Hugenberger, L. A. Kelley, I. Leonor, M.
Proceedings Title AIP Conference Proceedings
Volume 510
Pages 642-645
Date April 1, 2000
DOI 10.1063/1.1303280
ISBN 0094-243X
Short Title Milagro
Library Catalog
Abstract A new type of very high energy (> a few 100 GeV) gamma-ray observatory, Milagro, has been built with a large field of view of >1 steradian and nearly 24 hours/day operation. Milagrito, a prototype for Milagro, was operated from February 1997 to May 1998. During the summer of 1998, Milagrito was dismantled and Milagro was built. Both detectors use a 80 m×60 m×8 m pond of water in which a 3 m×3 m grid of photomultiplier tubes detects the Cherenkov light produced in the water by the relativistic particles in extensive air showers. Milagrito was smaller and had only one layer of photomultipliers, but allowed the technique to be tested. Milagrito observations of the Moon's shadow and Mrk 501 are consistent with the Monte Carlo prediction of the telescopes parameters, such as effective area and angular resolution. Milagro is larger and consists of two layers of photomultiplier tubes. The bottom layer detects penetrating particles that are used to reject the background of cosmic-ray initiated showers. .
Tags Observatories and site testing, X- and gamma-ray telescopes and instrumentation, gamma-ray
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