ASCA Observation of Ultra-Luminous X-Ray Sources in the Nearby Spiral Galaxy NGC 2403

Details ASCA Observation of Ultra-Luminous X-Ray Sources in the Nearby Spiral Galaxy NGC 2403 ASCA Observation of Ultra-Luminous X-Ray Sources in the Nearby Spiral Galaxy NGC 2403

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000pasj...52.1081k&link_type=abstract

Publications of the Astronomical Society of Japan, v.52, p.1081-L1085.

Physics

15

Black Hole Physics, Galaxies: Individual (Ngc 2403), Galaxies: Spiral, X-Rays: Galaxies

Scientific paper

The spiral galaxy NGC 2403 was observed with {ASCA}, and three previously known X-ray sources (sources 3, 4, and 5) were detected. Among them, the observed 0.5-10 keV flux of source 3 is 1.4times 10-12 erg s{-1 cm-2}, implying a bolometric luminosity of 3.0times 1039 erg s-1. Its spectrum can be explained by emission from an optically thick accretion disk with an inner-disk temperature of 1.1 keV. The spectrum and the high luminosity suggest that source 3 is a mass-accreting black hole binary. The observed properties of source 3 can be interpreted in terms of a black hole of mass ~ 15 MO , accreting at near the Eddington rate.

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