HEAO 3 upper limits to pulsed gamma-ray emission from PSR 1509 - 58 and PSR 0833 - 45
Journal Article
·
· Astrophysical Journal; (USA)
- Northwestern Univ., Evanston, IL (USA) JPL, Pasadena, CA (USA)
This paper reports upper limits to the 50 keV-10 MeV gamma-ray pulsations from PSR 1509 - 58 and PSR 0833 - 45 (Vela) made with the HEAO 3 gamma-ray spectrometer. The 2 sigma upper limit to the 50 - 300 keV flux from PSR 1509 - 58 is 6.9 x 10 to the -6th photons/sq cm per sec per keV. Combined with the best-fit X-ray spectrum, this limit suggests there is a break in the spectrum below about 100 keV. This upper limit is not stringent enough, however, to distinguish between thermal and nonthermal models for the source of the X-ray emission. The 2 sigma upper limit to the 3.2 - 10 MeV flux from PSR 0833 - 45 is 4.9 x 10 to the -8th photons/sq cm per sec per keV. 28 refs.
- OSTI ID:
- 5757438
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 369; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GAMMA BURSTS
COSMIC RADIATION
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GAMMA SPECTROMETERS
IONIZING RADIATIONS
LIMITING VALUES
MAGNETIC FIELDS
MEASURING INSTRUMENTS
PRIMARY COSMIC RADIATION
PULSARS
PULSATIONS
RADIATIONS
SIGNAL-TO-NOISE RATIO
SPECTRA
SPECTROMETERS
X-RAY SPECTRA
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GAMMA BURSTS
COSMIC RADIATION
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GAMMA SPECTROMETERS
IONIZING RADIATIONS
LIMITING VALUES
MAGNETIC FIELDS
MEASURING INSTRUMENTS
PRIMARY COSMIC RADIATION
PULSARS
PULSATIONS
RADIATIONS
SIGNAL-TO-NOISE RATIO
SPECTRA
SPECTROMETERS
X-RAY SPECTRA