Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349l..21s&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 349, Jan. 20, 1990, p. L21-L24. Research supported by CNES and AS
Astronomy and Astrophysics
Astronomy
9
Gamma Ray Astronomy, Pulsars, Astronomical Observatories, Energy Spectra, Light Curve, Stellar Luminosity
Scientific paper
Results are reported of a 7.75 hr observation of PSR 0833-45 in Vela with FIGARO II (French Italian GAmma Ray Observatory) performed during a balloon flight on November 25, 1988. Two-sigma upper limits for the pulsar flux are given in the gamma-ray energy range 0.2-6.0 MeV. The values are significantly lower than the measured flux obtained by the Riverside experiment as reported by Tumay Tumer et al. in 1984, 31 days after a large glitch in the pulsar period. The FIGARO data also show a departure from the extrapolatian below 50 MeV of the time-averaged flux measured by the COS B satellite, suggesting the existence of a break in the 'quiescent' energy spectrum for values at or obove 5-10 MeV.
Agrinier Bernard
Barouch E.
Costa Edgar
Gerardi G.
Hote C.
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