1999A&A...342..496T

Query : 1999A&A...342..496T

1999A&A...342..496T - Astronomy and Astrophysics, volume 342496-501 (1999/2-2)

Spring, 1997 GRANAT/SIGMA observations of the Galactic Center: discovery of the X-ray nova GRS 1737-31.

TRUDOLYUBOV S., CHURAZOV E., GILFANOV M., REVNIVTSEV M., SUNYAEV R., KHAVENSON N., DYACHKOV A., TSERENIN I., VARGAS M., GOLDONI P., LAURENT P., PAUL J., JOURDAIN E., ROQUES J.-P., MANDROU P. and VEDRENNE G.

Abstract (from CDS):

The results of GRANAT/SIGMA hard X-ray observations of the Galactic center in March, 1997 are reported. One new source - GRS 1737-31 and two previously known sources - 1E 1740.7-2942 and GRO J1744-28 were detected. The spectral and temporal behavior of GRS 1737-31 suggests that this source may be a distant X-ray Nova and a black hole candidate. The comparison of the hard X-ray transient detection rates by GRANAT/SIGMA and currently operating all-sky monitors (CGRO/BATSE, GRANAT/WATCH) leads to following conclusions regarding the spatial and luminosity distributions of the hard X-ray transients: (i) the spatial distribution of X-ray Novae exhibits a concentration towards the Galactic Center similar to the distribution of the visible matter in the Galaxy. In particular, it is more concentrated than Galactic disk population. (ii) if hard X-ray transients follow distribution of visible mass in the Galaxy then their peak luminosity in the 35-150keV band is close to 1037erg/s with a relatively small scatter.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: 1E 1740.7-2942 - stars: individual: GRO J1744-28 - stars: individual: GRS 1737-31 - stars: novae, cataclysmic variables - gamma rays: observations - X-rays: stars

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V2116 Oph Sy* 17 32 02.1532435416 -24 44 44.129169096   20.78 18.4     M6IIIe 719 1
2 AX J1733.9-3112 LXB 17 33 32.00 -31 13 00.0           ~ 54 0
3 INTREF 806 LXB 17 39 56.00 -30 59 00.0           ~ 7 0
4 AX J1740.1-3102 X 17 40 09.000 -31 02 24.00           ~ 42 1
5 V* V2606 Oph CV* 17 42 40.030 -27 44 52.70     23.2     ~ 163 0
6 2E 3938 HXB 17 43 54.7 -29 44 44           ~ 693 1
7 3FHL J1746.2-2852 LXB 17 44 33.09 -28 44 27.0           ~ 559 0
8 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 955 0
9 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
10 2CXO J180112.3-254436 HXB 18 01 12.4783119670 -25 44 35.694663099           AV 417 1
11 HD 226868 HXB 19 58 21.6757355952 +35 12 05.784512688 9.38 9.72 8.91 8.42   O9.7Iabpvar 4590 0

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