SIMBAD references

2002ApJ...576..738W - Astrophys. J., 576, 738-744 (2002/September-2)

The nature of ultraluminous X-ray sources in NGC 4565.

WU H., XUE S.-J., XIA X.Y., DENG Z.G. and MAO S.

Abstract (from CDS):

We report the optical identifications of two X-ray-luminous point sources in the spiral galaxy NGC 4565 based on archive data of Chandra and the Hubble Space Telescope. The central X-ray point source, RX J1236.3+2559, is found to be the nucleus of NGC 4565 with an X-ray luminosity of LX~4.3x1039 ergs. s–1. We show that its multiband properties are consistent with its being a low-luminosity active galactic nucleus. A faint optical counterpart with B~25.1 and I~24.0 was identified for the off-nucleus X-ray point source, RX J1236.2+2558. Its extinction-corrected B magnitude is estimated to be 24.5. The X-ray-to-optical flux ratio (fX/fB) is about 540. From the optical and X-ray properties, we argue that RX J1236.2+2558 is an ultraluminous X-ray compact source with LX~6.5x1039 ergs. s–1. The source is probably located in a faint globular cluster at the outer edge of NGC 4565's bulge.

Abstract Copyright:

Journal keyword(s): Galaxies: Individual: NGC Number: NGC 4565 - Galaxies: Nuclei - X-Rays: Galaxies

Simbad objects: 14

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