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Locating very high energy gamma-ray sources with arcminute accuracyThe angular accuracy of gamma-ray detectors is intrinsically limited by the physical processes involved in photon detection. Although a number of pointlike sources were detected by the COS B satellite, only two have been unambiguously identified by time signature with counterparts at longer wavelengths. By taking advantage of the extended longitudinal structure of VHE gamma-ray showers, measurements in the TeV energy range can pinpoint source coordinates to arcminute accuracy. This has now been demonstrated with new data analysis procedures applied to observations of the Crab Nebula using Cherenkov air shower imaging techniques. With two telescopes in coincidence, the individual event circular probable error will be 0.13 deg. The half-cone angle of the field of view is effectively 1 deg.
Document ID
19910063866
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Akerlof, C. W.
(Michigan, University Ann Arbor, United States)
Cawley, M. F.
(Saint Patrick's College Maynooth, Republic of Ireland, United States)
Chantell, M.
(Michigan Univ. Ann Arbor, MI, United States)
Harris, K.
(Michigan Univ. Ann Arbor, MI, United States)
Lawrence, M. A.
(Whipple Observatory Amado, AZ, United States)
Fegan, D. J.
(Michigan Univ. Ann Arbor, MI, United States)
Lang, M. J.
(University College Dublin, Republic of Ireland, United States)
Hillas, A. M.
(Leeds, University United Kingdom)
Jennings, D. G.
(Michigan Univ. Ann Arbor, MI, United States)
Lamb, R. C.
(Iowa State University of Science and Technology, Ames, United States)
Date Acquired
August 14, 2013
Publication Date
August 20, 1991
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 377
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
91A48489
Funding Number(s)
CONTRACT_GRANT: NAG5-1381
CONTRACT_GRANT: DE-AC02-76ER-01112
CONTRACT_GRANT: DE-AC02-80ER-10774
CONTRACT_GRANT: DE-AC02-82ER-40063
CONTRACT_GRANT: NAG5-1591
Distribution Limits
Public
Copyright
Other

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