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Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1988

The Haleakala gamma ray observatory

L.K. Resvanis; S. Tzamarias; G. Voulgaris; A. Szentgyorgyi; John L. Hudson; Lawrence A. Kelley; J. G. Learned; Constantine Sinnis; V. J. Stenger; D. Weeks; J. A. Gaidos; M. Kertzman; F. Loeffler; T. Palfrey; G. H. Sembroski; C. Wilson; U. Camerini; J. Finley; M. Frankowski; W. Fry; M. Jaworski; J. Jennings; A. Kenter; R. Koepsel; M. Lomperski; R. Loveless; R. March; J. Matthews; R. Morse; D.D. Reeder

A 10 m2 multi-mirror telescope for observing Cherenkov light signals from atmospheric cascades is now operating at Mount Haleakala, Maui, Hawaii. It differs from other atmospheric Cherenkov detectors in accepting pulses that originate from single photoelectrons, employing two sets of 18 optically independent phototubes in a logic system with nanosecond time resolution to reject ambient light from the night sky. With an angular aperture of 1.3 × 10−4 sr, cosmic ray showers are observed at a rate of ∼ 0.5 hz at the zenith, with nearly complete rejection of ambient light. This rate for hadronic showers implies an effective threshold near 100 GeV for electromagnetic showers. Two regions of the sky, one centered on the source and the other separated by from it by 3.6° are simultaneously monitored. Examples of observations of episodic and periodic (pulsar) sources are given.


The Astrophysical Journal | 1988

VHE gamma rays from Hercules X-1

Leonidas K. Resvanis; Andrew Szentgyorgyi; John L. Hudson; Lawrence A. Kelley; J. G. Learned; Constantine Sinnis; V. J. Stenger; D. Weeks; J. A. Gaidos; M. Kertzman; F. Loeffler; T. Palfrey; G. H. Sembroski; C. Wilson; U. Camerini; J. Finley; W. Fry; J. Jennings; A. Kenter; M. Lomperski; R. Loveless; R. March; J. N. Matthews; R. Morse; D.D. Reeder; Patrick O. Slane


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1992

A background-free detector for cosmic ray showers in the atmosphere

E. Anassontzis; L.K. Resvanis; G. Voulgaris; T. Ypsilantis; R. Tripp; S. Torres; A.R.P. Biral; J.A. Chinellato; A. Turtelli; R.J. Cence; C. Hayes; John L. Hudson; Lawrence A. Kelley; J. G. Learned; D. Paluselli; V. J. Stenger; B. Bartoli; G. Sinnis; D. Weekes; M. Cresti; L. Peruzzo; A. Pesci; A. Saggion; G. Sartori; M. Luksys; F. Angelini; Franco Bedeschi; R. Bellazzini; E. Bertolucci; G. Chiarelli


Archive | 1988

VHE Gamma - Rays from Her X - 1

Patrick O. Slane; U. Camerini; J. P. Finely; W. F. Fry; J. Jennings; A. Kenter; M. Lomperski; R. Loveless; R. March; Jaymie M. Matthews; R. Morse; D.D. Reeder; Leonidas K. Resvanis; Andrew Szentgyorgyi; John L. Hudson; Lawrence A. Kelley; J. G. Learned; Constantine Sinnis; V. J. Stenger; J. A. Gaidos; M. Kertzman; F. J. Loeffler; T. R. Jr. Palfrey; G. H. Sembroski; Charlie Wilson


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

An Experiment to Detect Correlations Between Cerenkov And Muon Lateral Distributions In EAS

Sm Paling; A. M. Hillas; G. E. Allen; D. Berley; S. D. Biller; R. L. Burman; M. Cavalli-Sforza; Min Chen; Pamela Renee Chumney; D. G. Coyne; Cynthia L. Dion; D. E. Dorfan; R. W. Elllsworth; J. A. Goodman; Ted Haines; C. M. Hoffman; Lawrence A. Kelley; V. D. Sandberg; David M. Schmidt; Richard W. Schnee; A. Shoup; Constantine Sinnis; David A. Williams; Jeffrey Wu; T. Yang; G. Yodh


Archive | 1995

Gamma-Ray Bursts: Detection and Distance Estimates with Milagro

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; Lawrence A. Kelley; Spencer R. Klein; I. Leonor; A. Lu; Allen Mincer; P. Nemethy; V. Sandberg; David M. Schmidt


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


Archive | 1989

Results from Haleakala: Cygnus X-3, 1986 to 1989

Robert Andreas Austin; U. Camerini; James Philip Finley; W. F. Fry; J. A. Gaidos; John L. Hudson; Jan Rune Jacobsen; J. Jennings; Lawrence A. Kelley; A. Kenter; M. Kertzman; G. J. Learned; F. J. Loeffler; R. Loveless; R. March; J. Matthews; R. Morse; T. Palfery; D.D. Reeder; K. L. Resvanis; G. H. Sembroski; Constantine Sinnis; M. Skinner; Patrick O. Slane; Andrew Szentgyorgyi; C. Wilson; G. Zernstein

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A. Kenter

University of Wisconsin-Madison

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D.D. Reeder

University of Wisconsin-Madison

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J. Jennings

University of Wisconsin-Madison

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R. Loveless

University of Wisconsin-Madison

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R. March

University of Wisconsin-Madison

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R. Morse

University of Wisconsin-Madison

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