2007A&A...464..291I


Query : 2007A&A...464..291I

2007A&A...464..291I - Astronomy and Astrophysics, volume 464291-297 (2007/3-2)

Chandra observation of the dipping source XB 1254-690.

IARIA R., DI SALVO T., LAVAGETTO G., D'AI A. and ROBBA N.R.

Abstract (from CDS):

We present the results of a 53ks long Chandra observation of the dipping source XB 1254-690. During the observation neither bursts or dips were observed. From the zero-order image we estimated the precise X-ray coordinates of the source with a 90% uncertainty of 0.6". Since the lightcurve did not show any significant variability, we extracted the spectrum corresponding to the whole observation. We confirmed the presence of the FeXXVI Kα absorption lines with a larger accuracy with respect to the previous XMM EPIC pn observation. Assuming that the line width were due to a bulk motion or a turbulence associated to the coronal activity, we estimate that the lines were produced in a photoionized absorber between the coronal radius and the outer edge of the accretion disk.

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Journal keyword(s): accretion, accretion disks - stars: individual: XB 1254-690 - stars: neutron - X-rays: stars - X-rays: binaries - line: identification

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 - 2026
#notes
1 V* GR Mus LXB 12 57 37.1833002949 -69 17 18.996899563   19.40 19.1     ~ 275 0
2 4U 1323-62 LXB 13 26 37.0 -62 08 09           ~ 192 0
3 V* V1033 Sco HXB 16 54 00.1423963019 -39 50 44.761701340       16.14   F3-6IV 1980 0
4 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 805 0
5 V* V5512 Sgr LXB 18 14 31.3 -17 09 23     12.73     K5III 449 0
6 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
7 V* V1405 Aql LXB 19 18 47.6 -05 14 18 20.90 21.40 21.0     ~ 495 0

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