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most citedX-ray monitoring of optical novae in M31 from July 2004 to February 2005

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astro-ph2004

Integral field spectroscopy of the ultraluminous X-ray source Holmberg II X-1

I. Lehmann, T. Becker, S. Fabrika +10

We present optical integral field observations of the H II region containing the ultraluminous X-ray source Holmberg II X-1. We confirm the existence of an X-ray ionized nebula as…