Abstract We present results from ROSAT observations of NGC 1808 and NGC 2903. Exposures of 10 ksec each with the PSPC detector show X-ray sources at the central positions of both galaxies which are classified as nuclear starburst galaxies. Both targets, NGC 1808 and NGC 2903 appear slightly extended in X-ray maps in the energy band 0.1–2.4 keV. The X-ray spectrum of NGC 1808 shows almost complete absorption below 0.5 keV, indicating an extremely high hydrogen column density towards that source (N H ≈ 8 × 1021cm−2 resulting from model fits on the PSPC spectrum). In case of NGC 2903, the number of counts in the ROSAT band is significantly lower than expected from a previous EINSTEIN investigation of the source.
ROSAT PSPC observations of two starburst galaxies
Advances in Space Research ; 13 , 12 ; 323-326
1993-01-01
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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