Low energy gamma rays from PSR1822-09

Details Low energy gamma rays from PSR1822-09 Low energy gamma rays from PSR1822-09

Sep 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.287..124m&link_type=abstract

Nature, vol. 287, Sept. 11, 1980, p. 124-126. Centre National d'Etudes Spatiales

Computer Science

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Gamma Ray Astronomy, Pulsars, Radio Stars, Balloon Sounding, Energy Spectra, Light Curve

Scientific paper

Observations of gamma rays with energies between 80 keV and 6 MeV from the radio pulsar PSR 1822-109 are reported. The observations were made during a 5-hr balloon flight up to 2.4 g/sq cm altitude using 1 10-cm diameter CsI(T1) crystal. The light curve between 454 and 1126 keV is observed to have two characteristic peaks separated by a phase of 0.5 plus or minus 1, which are taken as pulsed bins. The energy spectrum of the pulsed events is only observed in the 300-530 keV and 530-1126 keV channels, in contrast to that of the Crab pulsar. Results imply that the most important part of the energy emitted by PSR 1822-09 is in the MeV range, however, further observation is needed to confirm the result and understand the geometry of pulsar gamma-ray emission.

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