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Dive into the research topics where Spencer R. Klein is active.

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Featured researches published by Spencer R. Klein.


The Astrophysical Journal | 1993

Daily search for emission of ultra-high-energy radiation from point sources

D. E. Alexandreas; G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; D.R. Cady; M. Cavalli-Sforza; C. Y. Chang; D. G. Coyne; Cynthia L. Dion; G. M. Dion; D. E. Dorfan; R. W. Ellsworth; S. J. Freedman; B. K. Fujikawa; J. A. Goodman; C. M. Hoffman; L. Kelley; Spencer R. Klein; D.A. Krakauer; Ping Wai Kwok; X.-Q. Lu; D. E. Nagle; M.E. Potter; V. Sandberg; Constantine Sinnis; A. Shoup; Michael J. R. Stark; P. R. Vishwanath; D. D. Weeks

A daily search for emission of ultra-high-energy radiation from astrophysical point sources using the CYGNUS extensive air shower array is described. The data set spans the period from 1986 April 4 to 1992 June 22. Fifty-one astrophysical objects have been examined, including Cyg X-3, Her X-1, the Crab, a number of gamma-ray and X-ray sources from the COS B and the fourth Uhuru catalogs, and several cataclysmic variables, nearby galaxies, and radio pulsars. The observed daily number of events from the source directions are consistent with expected statistical fluctuations of the number of events from backgrounds cosmic rays


The second Compton symposium | 2008

Astrophysics with MILAGRO

J. A. Goodman; S. W. Barwick; R. L. Burman; S. D. Biller; M. Cavalli-Sforza; C. Y. Chang; Min Chen; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; S. J. Freedman; B. F. Fujikawa; Ted Haines; C. M. Hoffman; L. A. Kelly; Spencer R. Klein; R. C. Lamb; Allen Mincer; D. E. Nagle; P. Nemethy; T. J. O’Neill; V. D. Sanberg; S. Schaller; David M. Schmidt; Constantine Sinnis; O. T. Tumer; D. D. Weeks; D. H. White; D. A. Williams

This paper describes how data from a new type of air shower detector, MILAGRO, can shed light on a variety of interesting problems in astrophysics. MILAGRO has the capability to make observations of VHE/UHE emission from the recently discovered TeV gamma‐ray source Markarian 421, an Active Galactic Nucleus (AGN). An observation of the attenuation of this signal in the range of 1–20 TeV can be used to make the first measurement of the intergalactic infrared radiation. We will also describe how MILAGRO can improve the existing limits on the density of Primordial Black Holes (PBH) by three orders of magnitude. In addition, MILAGRO will have a large aperture and continuous operation which gives it the capability to search for VHE gamma ray bursts.


The Astrophysical Journal | 1994

SEARCH FOR ULTRA-HIGH-ENERGY POINT-SOURCE EMISSION OVER VARIOUS TIMESCALES

S. D. Biller; D. E. Alexandreas; G. E. Allen; D. Berley; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; M. L. Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; G. M. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; M. Harmon; C. M. Hoffman; L. Kelley; Spencer R. Klein; D. E. Nagle; S. C. Schaller; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; Michael J. R. Stark; D. D. Weeks; Dc Williams; Jeffrey Wu; T. Yang


The Astrophysical Journal | 1994

SEARCH FOR ULTRA-HIGH-ENERGY RADIATION FROM GAMMA-RAY BURSTS

D. E. Alexandreas; G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; G. M. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; M. Harmon; C. M. Hoffman; L. Kelley; Spencer R. Klein; D. E. Nagle; S. C. Schaller; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; Michael J. R. Stark; D. D. Weeks; David A. Williams; Jeffrey Wu; T. Yang


Archive | 1995

A Study of Large-Zenith-Angle Air Showers with the CYGNUS Experiment

G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; Ted Haines; C. M. Hoffman; Lawrence A. Kelley; Spencer R. Klein; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; Michael J. R. Stark; David A. Williams; Jeffrey Wu; T. Yang; G. Yodh


Archive | 1995

Searching for Gamma-Ray Bursts with Water-Cherenkov-Detector Single-Particle Rates

G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; Ted Haines; C. M. Hoffman; L. A. Kelley; Spencer R. Klein; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; David A. Williams; Jeffrey Wu; T. Yang; G. Yodh


Archive | 1995

Status and Prospects of the EAS Experiment KASCADE

G. E. Allen; S. W. Barwick; Daniel Adams Bauer; D. Berley; S. D. Biller; R. L. Burman; David O. Caldwell; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; Galen R. Gisler; J. A. Goodman; Ted Haines; C. M. Hoffman; Gary Elliott Hogan; S. Hugenberger; John S Humphreys; L. A. Kelley; Spencer R. Klein; I. Leonor; A. Lu; Allen Mincer; P. Nemethy; V. Sandberg; Richard W. Schnee


Archive | 1995

Water Charenkov Detectors for Large Air Showers

G. E. Allen; S. W. Barwick; Daniel Adams Bauer; D. Berley; S. D. Biller; R. L. Burman; David O. Caldwell; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Galen R. Gisler; J. A. Goodman; Ted Haines; C. M. Hoffman; Gary Elliott Hogan; S. Hugenberger; John S Humphreys; L. A. Kelley; Spencer R. Klein; I. Leonor; A. Lu; Allen Mincer; P. Nemethy; V. Sandberg; Richard W. Schnee; Baochun Shen; A. Shoup; Constantine Sinnis; Ion Stancu; T. Tumar


Archive | 1995

Search for UHE Emission from Supernova Remnants

G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; Ted Haines; C. M. Hoffman; Lawrence A. Kelley; Spencer R. Klein; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; Michael J. R. Stark; David A. Williams; Jeffrey Wu; T. Yang; G. Yodh


Archive | 1995

Source Searches Using the CYGNUS Water-Cerenkov Array

G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; C. Y. Chang; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Ellsworth; J. A. Goodman; Ted Haines; C. M. Hoffman; Lawrence A. Kelley; Spencer R. Klein; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; Michael J. R. Stark; David A. Williams; Jeffrey Wu; T. Yang; G. Yodh

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R. L. Burman

Los Alamos National Laboratory

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S. D. Biller

University of California

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C. M. Hoffman

United States Department of Energy

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D. E. Dorfan

University of California

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D. G. Coyne

University of California

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A. Shoup

University of California

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