The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8

Details The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8 The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8

Aug 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..906m&link_type=abstract

Astrophysical Journal, Part 1, vol. 231, Aug. 1, 1979, p. 906-911.

Astronomy and Astrophysics

Astronomy

13

Binary Stars, Pulsars, Spaceborne Astronomy, X Ray Spectra, X Ray Stars, Degrees Of Freedom, Oso-8, Radiant Flux Density, Satellite Observation, X Ray Astronomy, X Ray Sources

Scientific paper

Hercules X-1 was observed from August 30 to September 10, 1977, by using the high-energy X-ray scintillation spectrometer on board the OSO 8 satellite. The observation, during which the source was monitored continually for nearly an entire ON-state, covered the energy range from 16 to 280 keV. Pulsed-flux measurements as a function of binary orbit and binary phase are presented for energies between 16 and 98 keV. The pulsed flux between 16 and 33 keV exhibited a sharp decrease following the fourth binary orbit and was consistent with zero pulsed flux thereafter. Only weak evidence was found for temporal variation in the pulsed flux between 33 and 98 keV. The pulsed spectrum has been fitted with a power law, a thermal spectrum without features, and a thermal spectrum with a superposed Gaussian centered at 55 keV. The latter fit has the smallest value of chi-square per degree of freedom, and the resulting integrated line intensity is approximately 0.0015 photon/sec per sq cm for a width of 3.1 (+9.1, -2.6) keV. This result, while of low statistical significance, agrees with the value observed by Truemper (1978) during the same ON-state.

Affiliated with

Also associated with

No associations

Rating

The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The high-energy pulsed X-ray spectrum of Hercules X-1 as observed with OSO 8 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1483548