GeV gamma-ray astronomy telescopes with high angular resolution

Details GeV gamma-ray astronomy telescopes with high angular resolution GeV gamma-ray astronomy telescopes with high angular resolution

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aexpr...1..105m&link_type=abstract

Astronomy Express (ISSN 0265-5365), vol. 1, Sept. 1984, p. 105-109.

Astronomy and Astrophysics

Astronomy

4

Gamma Ray Astronomy, Gamma Ray Telescopes, Angular Resolution, Electron-Positron Pairs, High Resolution, Pair Production, Relativistic Particles

Scientific paper

Gamma-ray telescopes flown on satellites have poor angular resolution with typical point source error circles of a few square degrees. It is shown that a major improvement in angular resolution for the detection of gamma-rays in the GeV region can be obtained with a single crystal as converter. The electron produced by a gamma ray incident at a small angle to a major crystal axis or plane is captured into channeling and radiates gamma rays. The channeling radiation and the electron-positron pair can be detected and yield point source locations with a precision of 5 arcseconds at 10 GeV. This is an improvement of three orders of magnitude on the angular precision of telescopes sensitive to gamma-rays above 50 MeV flown on satellites.

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