Disc and secondary irradiation in dwarf

X-ray novae (XRNe) are a subset of the low mass X-ray binaries (LMXBs), containing a compact object primary (M1) accreting material via Roche lobe overflow from a low mass (M2 � 1 M ⊙) secondary star. The secondary is normally a K or M-type main sequence

We report the discovery with INTEGRAL on March 24, 2005, and follow-up observations of the distant Galactic X-ray nova IGR J17098-3628. Key words: X-ray nova; transient; outburst; black hole. 1.

Recent models based on General Relativity attribute important spectral features of some accreting neutron stars to their surfaces and ”gap accretion ” while observations of x-ray novae indicate a surprising lack of distinguishing spectral characteristics between these neutron stars and black hole

We discuss new observations of X-ray novae which provide strong evidence that black holes have event horizons. Optical observations of 13 X-ray novae indicate that these binary stars contain collapsed objects too heavy to be stable neutron stars. The objects have been identified as black hole

We simulate the observation of a bright Nova Muscalike X-ray nova during outburst with INTEGRAL, the next ESA γ-ray space observatory. We will show how performances of the INTEGRAL instruments allow deep study of X-ray Novae and will evaluate the scientific output that INTEGRAL will provide

We discuss new observations of X-ray novae which provide strong evidence that black holes have event horizons. Optical observations of 13 X-ray novae indicate that these binary stars contain collapsed objects too heavy to be stable neutron stars. The objects have been identified as black hole

Excellent coverage of the 1998 outburst of the X-ray Nova XTE J1550–564 was provided by the Rossi X-ray Timing Explorer. XTE J1550–564 exhibited an intense (6.8 Crab) flare on 1998 September 19 (UT), making it the brightest new X-ray source observed with RXTE. We present a spectral analysis

The soft X-ray nova GRS 1739-278 flared up in 1996 near the Galactic center. We present the observations of this interesting source, a black-hole candidate, with the instruments on board the Mir-Kvant module and the RXTE satellite. The TTM data allow the spectrum of the X-ray nova to be studied

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