EXOSAT observations of the bright X-ray source GX9+1

Details EXOSAT observations of the bright X-ray source GX9+1 EXOSAT observations of the bright X-ray source GX9+1

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..367l&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

7

Exosat Satellite, Satellite Observation, X Ray Sources, Black Body Radiation, Bremsstrahlung, Spectrum Analysis

Scientific paper

The results of the spectral and timing analysis of an observation of GX9+1/4U1758-205 performed with the Medium Energy Experiment aboard Exosat are presented. During the observation, the source flux varied irregularly in time scales from minutes to hours. No periodic emission in the period range from 16 msec to 2000 sec was found with an upper limit of around 1 percent (3 sigma) for the pulsed fraction. The hardness ratio shows a correlated change with the flux intensity (Sco X-1 behavior). The spectrum could be fitted by a double component model, a black body component (kT=1.16-1.26 keV) together with a thermal bremsstrahlung law (kT=13-15 keV. No iron line was detected. The X-ray spectral behavior of GX9+1 indicates that this source belongs to the class of Low-Mass X-ray Binaries (LMXB).

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