1998A&A...339..483R


Query : 1998A&A...339..483R

1998A&A...339..483R - Astronomy and Astrophysics, volume 339, 483-488 (1998/11-2)

RXTE broad band observations of X-ray Nova XTE J1755-324.

REVNIVTSEV M., GILFANOV M. and CHURAZOV E.

Abstract (from CDS):

The properties of X-ray Nova XTE J1755-324, observed with the RXTE observatory in 1997 are reported. The lightcurve of the source was typical for X-ray Novae, except for somewhat shorter decay time scale and the time elapsed between the primary and subsequent secondary and tertiary outbursts. At the peak of the lightcurve the source had a two-component spectrum, typical for the bright X-ray Novae, with a characteristic disk blackbody temperature Tin∼0.8keV and a photon index of the hard power law tail α∼2.0. The peak luminosity can be roughly estimated as L∼1038erg/s (0.1-100keV, assuming 8.5kpc distance). A notable and peculiar feature of the spectral evolution of the source was a short, ∼10days long, episode of increased hardness, occurred shortly before the tertiary maximum of the light curve. During the last RXTE pointed observations ∼100days after the primary outburst the source has been found in the hard spectral state with a luminosity ∼fewx1036erg/s. The overall pattern of the temporal and spectral evolution of XTE J1755-324 resembles in general that of ``canonical'' X-ray Novae (e.g. Nova Muscae 1991) and suggests that the compact object in the binary system is a black hole.

Abstract Copyright:

Journal keyword(s): accretion, accretion disks - black hole physics - gamma-rays: observations - stars: individual: XTE J1755-324 - X-rays: stars

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* GU Mus HXB 11 26 26.5961559600 -68 40 32.877752952           K3V-K7V 691 1
2 AX J1733.9-3112 LXB 17 33 32.00 -31 13 00.0           ~ 52 0
3 V* V2606 Oph CV* 17 42 40.030 -27 44 52.70     23.2     ~ 131 0
4 NAME Great Annihilator LXB 17 43 54.83 -29 44 42.6           ~ 661 1
5 INTREF 866 LXB 17 55 28.6 -32 28 39     10.79     ~ 42 0
6 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4161 0
7 V* QZ Vul HXB 20 02 49.58 +25 14 11.3   19.64 18.2     K3V-K6V 408 0

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2022.11.26-09:32:00

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