2007A&A...461.1049S


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.02CET12:55:39

2007A&A...461.1049S - Astronomy and Astrophysics, volume 461, 1049-1056 (2007/1-3)

The highly ionized disk wind of GRO J1655-40.

SALA G., GREINER J., VINK J., HABERL F., KENDZIORRA E. and ZHANG X.L.

Abstract (from CDS):

The galactic superluminal microquasar GRO J1655-40 started a new outburst in February 2005, after seven years in quiescence, rising to a high/soft state in March 2005. In this paper we study the X-ray spectra during this rise. We observed GRO J1655-40 with XMM-Newton on 27 February 2005 in the low/hard state, and on three consecutive days in March 2005 during the rise of the source to its high/soft state. The EPIC-pn camera was used in the fast-read burst mode to avoid photon pile-up. First, we contributed to the improvement of the calibration of the EPIC-pn, since the high flux received from the source required some refinements in the correction of the charge transfer efficiency of the camera. Second, we find that the X-ray spectrum of GRO J1655-40 is dominated in the high/soft state by the thermal emission from the accretion disk, with an inner radius of 13-14[D/3.2 kpc] km and a maximum temperature of 1.3keV. We detected two absorption lines in the EPIC-pn spectra at 6.7-6.8 and 7.8-8.0keV, which can be identified as the Kα and Kβ lines of either blended Fe XXV and Fe XXVI or blueshifted Fe XXV. We find no orbital dependence on the X-ray properties, which provides an upper limit for the inclination of the system of 73°. The RGS spectrometers reveal interstellar absorption features at 17.2Å, 17.5Å (Fe L edges), and 23.54Å (OI Kα). Finally, while checking the interstellar origin of the OI line, we found a general correlation of the OI Kα line equivalent width with the hydrogen column density using several sources available in the literature.

Abstract Copyright:

Journal keyword(s): X-rays: stars - stars: binaries: close - X-rays: individuals: GRO J1655-40

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 - 2021
#notes
1 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           ~ 4864 1
2 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5702 4
3 X LMC X-3 HXB 05 38 56.6325045489 -64 05 03.321118015   17 17.2     B2.5Ve 635 0
4 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1741 1
5 [KRL2007b] 312 LXB 18 17 43.537 -33 01 07.80           ~ 142 0
6 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2346 0
7 V* V1341 Cyg LXB 21 44 41.1544523872 +38 19 17.065856122 15.00 15.13 14.68 15.00   A9III 1091 1

    Equat.    Gal    SGal    Ecl

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2021.03.02-12:55:39

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