Locating very high energy gamma ray sources with arc minute accuracy

Details Locating very high energy gamma ray sources with arc minute accuracy Locating very high energy gamma ray sources with arc minute accuracy

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3137..399a&link_type=abstract

In NASA. Goddard Space Flight Center, The Compton Observatory Science Workshop p 399-405 (SEE N92-21874 12-90)

Astronomy and Astrophysics

Astronomy

Cos-B Satellite, Gamma Ray Spectrometers, Gamma Rays, Imaging Techniques, Position (Location), Cerenkov Radiation, Crab Nebula, Field Of View, Gamma Ray Astronomy, Gamma Ray Telescopes, Half Cones, Photons

Scientific paper

The angular accuracy of gamma-ray detectors is intrinsically limited by the physical processes involved in photon detection. Although a number of point-like sources were detected by the COS-B satellite, only two were unambiguously identified by time signature with counterparts at longer wavelengths. By taking advantage of the extended longitudinal structure of Very High Energy gamma-ray showers, measurements in the TeV energy range can pinpoint source coordinates to arc minute accuracy. This was demonstrated using Cerenkov 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.

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