A search for fast gamma-ray pulsars with OSSE

Abstract

view Abstract Citations (2) References (43) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A Search for Fast Gamma-Ray Pulsars with OSSE Hertz, P. ; Grove, J. E. ; Grabelsky, D. A. ; Matz, S. M. Abstract Pulsar mode data from the Oriented Scintillation Spectrometer Experiment (OSSE) onboard the Compton Gamma Ray Observatory, with time resolution between 125 micro seconds and 8 milliseconds, have been analyzed for the presence of short-period γ-ray pulsations. Observations of known point sources (including SN 1987A, SN 1993J, GRO J0422+32, and several pulsars) and of regions where higher densities of pulsars are expected (including the Galactic center, the Galactic plane and arms, and the Large Magellanic Cloud) are included in the study. Both isolated pulsars and pulsars in close binary systems are searched for; in the latter case, the quadratic coherence recovery technique is used to correct for broadening of the pulsar signal from orbital motion. No new γ-ray pulsars have been detected. Upper limits on the pulsed γ-ray flux from isolated pulsars in the 50-210 KeV energy range of OSSE are between 0.2 x 10^-3^ and 2.0 x 10^-3^ photons s^-1^ cm^-2^ for pulse periods between 250 micro seconds and 0.5 seconds. Upper limits on the pulsed flux from binary pulsars are between 1.5 x 10^-3^ and 6.4 x 10^-3^ photons s^-1^ cm^-2^ for the same energy band and pulse period range. We estimate that, in the Galaxy, there are fewer than ~125 isolated pulsars similar to PSR B1509-58 with radiation peaks in the OSSE band but undetected in the radio and X-ray bands. Publication: The Astrophysical Journal Pub Date: May 1995 DOI: 10.1086/175700 Bibcode: 1995ApJ...445..351H Keywords: Binary Stars; Flux Density; Gamma Ray Spectra; Gamma Rays; Periodic Variations; Pulsars; Gamma Ray Observatory; Spectrum Analysis; Time Series Analysis; Astronomy; GAMMA RAYS: OBSERVATIONS; STARS: PULSARS: GENERAL full text sources ADS | data products SIMBAD (19) NED (8) HEASARC (1)