COS-B observations of pulsed gamma -ray emission from PSR 0531+21 and PSR 0833-45.
Abstract
Summary. CO S-B has performed detailed measurements of the high-energy y-ray emission from the Crab and Vela pulsars. The two pulsars exhibit very similar y-ray light curves, both with narrow peaks of roughly equal intensity separated by 0.42+0.03 of the period. The fractions of the y-rays of energy >50 MeV which are pulsed have 2a lower limit of 78 % in the case of PSR 0531+21 and 91% for PSR0833-45. The differential spectrum of PSR 0531+21 can be represented by (2.4 04)10 ?E (2.11O.3) in the range 50 MeV to 4 GeV, while it is difficult to reconcile the spectrum of PSR 0833-45 with a single power law over the same energy range. Key words: COS-B y-ray astronomy - pulsars Crab Vela
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- October 1977
- Bibcode:
- 1977A&A....61..279B
- Keywords:
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- Esa Satellites;
- Gamma Ray Astronomy;
- Pulsars;
- Crab Nebula;
- Satellite Observation;
- Spaceborne Astronomy;
- Astrophysics