2008A&A...492..557F


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.23CET09:17:07

2008A&A...492..557F - Astronomy and Astrophysics, volume 492, 557-563 (2008/12-3)

The INTEGRAL long monitoring of persistent ultra compact X-ray bursters.

FIOCCHI M., BAZZANO A., UBERTINI P., BIRD A.J., NATALUCCI L. and SGUERA V.

Abstract (from CDS):

The combination of compact objects, short period variability and peculiar chemical composition of the ultra compact X-ray binaries make up a very interesting laboratory to study accretion processes and thermonuclear burning on the neutron star surface. Improved large optical telescopes and more sensitive X-ray satellites have increased the number of known ultra compact X-ray binaries allowing their study with unprecedented detail. We analyze the average properties common to all ultra compact bursters observed by INTEGRAL from ∼0.2keV to ∼150keV. We have performed a systematic analysis of the INTEGRAL public data and Key-Program proprietary observations of a sample of the ultra compact X-ray binaries. In order to study their average properties in a very broad energy band, we combined INTEGRAL with BeppoSAX and SWIFT data whenever possible. For sources not showing any significant flux variations along the INTEGRAL monitoring, we build the average spectrum by combining all available data; in the case of variable fluxes, we use simultaneous INTEGRAL and SWIFT observations when available. Otherwise we compared IBIS and PDS data to check the variability and combine BeppoSAX with INTEGRAL/IBIS data. All spectra are well represented by a two component model consisting of a disk-blackbody and Comptonised emission. The majority of these compact sources spend most of the time in a canonical low/hard state, with a dominating Comptonised component and accretion rate {dot}(M) lower than ∼10–9M/yr, not depending on the model used to fit the data.

Abstract Copyright:

Journal keyword(s): gamma rays: observations - stars: neutron - X-rays: binaries

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* V1055 Ori LXB 06 17 07.3 +09 08 13   18.80 18.5     ~ 505 1
2 4U 1246-58 LXB 12 49 39.364 -59 05 14.68   19.24 18.99     ~ 77 0
3 4U 1705-32 LXB 17 08 54.40 -32 18 57.5           ~ 50 0
4 [KRL2007b] 228 LXB 17 12 35 -37 39.0           ~ 63 0
5 [KRL2007b] 238 LXB 17 25 25.50 -32 57 17.5           ~ 37 0
6 1ES 1735-26.9 LXB 17 38 17.12 -26 59 38.6           ~ 148 0
7 2RXP J174040.9-280852 HXB 17 40 41.2 -28 08 50           ~ 23 1
8 2E 1737.5-2817 LXB 17 40 42.84 -28 18 08.5           ~ 70 0
9 4U 1812-12 LXB 18 15 06.15 -12 05 46.7           ~ 104 2
10 NGC 6624 GlC 18 23 40.51 -30 21 39.7           ~ 763 1
11 X Sgr X-4 LXB 18 23 40.57 -30 21 40.6   19.06 18.81     ~ 898 1
12 NAME RX J1832-33 LXB 18 35 43.649 -32 59 26.77     18.9     ~ 83 1
13 NGC 6652 GlC 18 35 45.63 -32 59 26.6   10.64 9.75     ~ 340 1
14 NGC 6712 GlC 18 53 04.32 -08 42 21.5   9.85 8.69     ~ 462 0
15 4U 1850-086 LXB 18 53 04.89 -08 42 19.7 20.40 21.20 21.0     ~ 229 1

    Equat.    Gal    SGal    Ecl

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2020.02.23-09:17:07

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