The X-ray source Serpens X-1 - Ariel 5 observations and discussion of models for the spectrum and time variability

Details The X-ray source Serpens X-1 - Ariel 5 observations and discussion of models for the spectrum and time variability The X-ray source Serpens X-1 - Ariel 5 observations and discussion of models for the spectrum and time variability

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978mnras.184..355c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 184, Aug. 1978, p. 355-364. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

2

Astronomical Models, Light Curve, Satellite Observation, X Ray Sources, Ariel 5 Satellite, Bursts, Compton Effect, Eddington Approximation, Power Spectra, Spaceborne Astronomy, X Ray Spectra

Scientific paper

Experimental data from Ariel 5 on the spectral shape and time variability of Ser X-1 are presented, and possible explanations for the observations are discussed in terms of current theoretical suggestions for source emission. The observations are summarized in the form of a light curve for 3-7.6-keV photons. The data are fitted with a power law of index -2.3, which yields a hydrogen column density of (1.1 + or - 0.4) x 10 to the 22nd power atoms/sq cm. No persistent periodicity of amplitude greater than 5% of the steady flux is found, but evidence of statistically significant burst activity is obtained. Various emission mechanisms are considered for the time-averaged spectrum and the X-ray bursts. It is suggested that the inverse Compton mechanism is a likely cause for the emission from this source and that the source is radiating near the Eddington limit.

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