Spectra and time variability of GX 5-1

Details Spectra and time variability of GX 5-1 Spectra and time variability of GX 5-1

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..361k&link_type=abstract

(ESA, ESLAB Symposium on X-Ray Astronomy in the EXOSAT Era, 18th, The Hague, Netherlands, Nov. 5-9, 1984) Space Science Reviews

Astronomy and Astrophysics

Astronomy

2

Astronomical Spectroscopy, X Ray Sources, Black Body Radiation, Energy Spectra, Exosat Satellite, Variability

Scientific paper

From a short observation of GX 5-1 with EXOSAT the authors have derived information on spectral and temporal behaviour in the energy range 1 - 20 keV. The source was found to be variable on time scales from 10 s to 1 h. Describing the spectrum one is forced to assume at least two spectral components. The best fit is reached using a spectrum composed of two blackbody functions with typical temperatures 1 keV and 2 keV, corresponding to apparent blackbody radii of 43 km and 11 km, respectively (for a distance of 10 kpc). With respect to the hot component there is evidence for variability in temperature as well as in apparent blackbody radius. No periodic variability has been found over the period range 0.25 s to 2000 s. There is no evidence for an iron emission line.

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