Authors

B L. Dingus, University of UtahFollow
R Atkins, University of UtahFollow
W Benbow, University of California - Santa Cruz
D Berley, University of Maryland - College Park
M L. Chen, University of Maryland - College Park
D G. Coyne, University of California - Santa Cruz
D E. Dorfan, University of California - Santa Cruz
R W. Ellsworth, George Mason University
D Evans, University of Maryland - College Park
A Falcone, University of New Hampshire - Main CampusFollow
L Fleysher, New York UniversityFollow
R Fleysher, New York UniversityFollow
G Gisler, Los Alamos National Laboratory
J A. Goodman, University of Maryland - College Park
T J. Haines, Los Alamos National LaboratoryFollow
C M. Hoffman, Los Alamos National Laboratory
S Hugenberger, University of California - Irvine
L A. Kelley, University of California - Santa Cruz
I Leonor, University of California - Irvine
M L. McConnell, University of New Hampshire - Main CampusFollow
J F. McCullough, University of California - Santa Cruz
J E. McEnery, University of UtahFollow
R S. Miller, University of New Hampshire - Main CampusFollow
A I. Mincer, New York University
M F. Morales, University of California - Santa CruzFollow
P Nemethy, New York University
James Ryan, University of New Hampshire
B Shen, University of California - Riverside
A Shoup, University of California - Irvine
C Sinnis, Los Alamos National Laboratory
A J. Smith, University of California - RiversideFollow
G W. Sullivan, University of Maryland - College Park
O T. Tumer, University of California - Riverside
K Wang, University of California - Riverside
M O. Wascko, University of California - Riverside
S Westerhoff, University of California - Santa Cruz
D A. Williams, University of California - Santa CruzFollow
T Yang, University of California - Santa Cruz
G B. Yodh, University of California - Irvine

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 mpond 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.

Publication Date

2000

Journal Title

AIP Conference Proceedings

Publisher

AIP Publishing

Digital Object Identifier (DOI)

10.1063/1.1303280

Document Type

Conference Proceeding

Rights

© 2000 American Institute of Physics

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