High and medium resolution spectroscopy of the X-ray transient 4U1543-47

Details High and medium resolution spectroscopy of the X-ray transient 4U1543-47 High and medium resolution spectroscopy of the X-ray transient 4U1543-47

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ssrv...40..207c&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

X Ray Sources, X Ray Spectroscopy, Bremsstrahlung, Emission Spectra, Exosat Satellite, High Resolution, Nitrogen, Oxygen

Scientific paper

Peliminary results of an EXOSAT observation of the transient X-ray source 4U1543-47 are presented. The source was observed in August 1983, during a high state, following a Tenma alert that the source was again active. Results from the GSPC and the LE 1000 1/mm grating are presented. The spectrum is complex, but in the 2 - 10 keV energy range can be well described by a Comptonised thermal distribution. Extrapolating the same model into the lower energy band of the grating requires an absorption column density equivalent to 2×1021H cm-2. A marked under-abundance of oxygen and overabundance of nitrogen, along with a strong, unidentified line feature at 9.8 Å, are necessary to model the grating data.

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