Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-08-13
Astronomy and Astrophysics
Astrophysics
MNRAS Letters in press, 6 pages, 7 figures in MNRAS LaTex style
Scientific paper
We report the serendipitous detection of an X-ray source, AXJ1749+684, with the ASCA Gas Imaging Spectrometer. AXJ1749+684 is identified with a LINER/starburst-type spiral galaxy KUG 1750+683A at a redshift z = 0.05. It has a hard X-ray spectrum, consistent with that of the X-ray background (XRB) in the 1-10 keV band. Despite the optical classification, the X-ray luminosity cannot be explained by starburst activity. Combined with spatial variations in the optical emission line ratios, this suggests the presence of an obscured Seyfert nucleus embedded within a starforming galaxy. Similar behaviour could explain the ambiguous properties of the faint narrow-line X-ray galaxies (NLXGs) emerging from deep X-ray surveys.
Almaini Omar
Brandt Wiliam N.
Crawford Carolin S.
Fabian Andrea C.
Iwasawa Kashuzi
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