1999A&A...345..100I

Query : 1999A&A...345..100I

1999A&A...345..100I - Astronomy and Astrophysics, volume 345100-108 (1999/5-1)

A new X-ray outburst in the globular cluster NGC 6440: SAX J1748.9-2021.

IN'T ZAND J.J.M., VERBUNT F., STROHMAYER T.E., BAZZANO A., COCCHI M., HEISE J., VAN KERKWIJK M.H., MULLER J.M., NATALUCCI L., SMITH M.J.S. and UBERTINI P.

Abstract (from CDS):

For the second time in 27 years a bright transient X-ray source has been detected coincident with the globular cluster NGC 6440. It was found to be active in August, 1998, with the Wide Field Camera and the narrow field instruments on the BeppoSAX spacecraft, and with the All-Sky Monitor and the Proportional Counter Array on the RossiXTE spacecraft. Four X-ray bursts were detected, at least one of which shows the characteristics of a thermonuclear flash on a neutron star, in analogy with some ∼20 optically identified low-mass X-ray binaries. The broad-band spectrum is hard as is common among low-mass X-ray binaries of lower luminosity (≲1037erg/s) and can be explained by a Comptonized model. During the burst the >30keV emission brightened, consistent with part of the burst emission being Compton up scattered within ∼1011cm.

Abstract Copyright: ∼

Journal keyword(s): X-rays: stars - X-rays: bursts - Galaxy: globular clusters: individual: NGC 6440 - stars: neutron - stars: individual: SAX J1748.9-2021 - stars: individual: MX 1746-20

Simbad objects: 20

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Number of rows : 20
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 NGC 1851 GlC 05 14 06.76 -40 02 47.6           ~ 1529 0
2 V* QX Nor LXB 16 12 43.0 -52 25 26           ~ 946 1
3 ESO 454-29 GlC 17 27 33.24 -30 48 07.8           ~ 278 0
4 4U 1722-30 LXB 17 27 33.25 -30 48 07.4     12.50     ~ 278 1
5 NAME Slow Burster LXB 17 31 58.0 -33 49 58     15.50     ~ 865 1
6 Liller 1 Cl* 17 33 24.50 -33 23 20.0           ~ 311 0
7 KS 1731-260 LXB 17 34 13.46 -26 05 18.6       22.8 20.9 ~ 437 0
8 Cl Terzan 5 Cl* 17 48 05.00 -24 46 48.0           ~ 948 1
9 [PLV2002] CX1 LXB 17 48 52.163 -20 21 32.40           ~ 213 1
10 NGC 6440 GlC 17 48 52.67 -20 21 34.5           ~ 592 0
11 4U 1745-203 LXB 17 48 53.40 -20 21 43.0           ~ 86 1
12 NGC 6441 GlC 17 50 13.06 -37 03 05.2           ~ 940 0
13 Cl Terzan 6 GlC 17 50 47.02873 -31 16 29.6900           ~ 214 0
14 X Sgr X-3 LXB 18 01 32.6 -20 31 45           ~ 254 1
15 SAX J1808.4-3658 LXB 18 08 27.58 -36 58 43.9           ~ 1051 0
16 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 939 1
17 V* V4634 Sgr LXB 18 29 28.8 -23 47 48 18.90 19.40 19     ~ 399 0
18 NGC 6652 GlC 18 35 45.63 -32 59 26.6           ~ 474 0
19 NGC 6712 GlC 18 53 04.32 -08 42 21.5           ~ 550 0
20 M 15 GlC 21 29 58.33 +12 10 01.2           ~ 3274 0

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