Locating very high energy gamma-ray sources with arcminute accuracy
The 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 waveleng...
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Veröffentlicht in: | The Astrophysical journal 1991-08, Vol.377 (2), p.L97-L100 |
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container_title | The Astrophysical journal |
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creator | Akerlof, C. W. Cawley, M. F. Chantell, M. Harris, K. Lawrence, M. A. Fegan, D. J. Lang, M. J. Hillas, A. M. Jennings, D. G. Lamb, R. C. |
description | The 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. |
doi_str_mv | 10.1086/186125 |
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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.</description><subject>Astronomical and space-research instrumentation</subject><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fundamental astronomy and astrophysics. 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F.</au><au>Chantell, M.</au><au>Harris, K.</au><au>Lawrence, M. A.</au><au>Fegan, D. J.</au><au>Lang, M. J.</au><au>Hillas, A. M.</au><au>Jennings, D. G.</au><au>Lamb, R. C.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Locating very high energy gamma-ray sources with arcminute accuracy</atitle><jtitle>The Astrophysical journal</jtitle><date>1991-08-20</date><risdate>1991</risdate><volume>377</volume><issue>2</issue><spage>L97</spage><epage>L100</epage><pages>L97-L100</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>The 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.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/186125</doi><oa>free_for_read</oa></addata></record> |
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subjects | Astronomical and space-research instrumentation Astronomy Earth, ocean, space Exact sciences and technology Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations |
title | Locating very high energy gamma-ray sources with arcminute accuracy |
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