XMM-Newton observations of the INTEGRAL X-ray transient IGR J17544-2619

González‐Riestra, R.; Oosterbroek, T.; Kuulkers, E.; Orr, A.; Parmar, A. N.

doi:10.1051/0004-6361:20035940

Cited by 52 publications

(65 citation statements)

References 18 publications

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“…The source was also monitored with Swift/XRT for more than two years , during which a number of typical SFXT outbursts were identified. Enhanced variability in the X-ray domain was also evidenced in two relatively short observations performed with XMM-Newton in 2003 (González-Riestra et al, 2004). An unprecedentedly bright outburst was detected by the source in 2014, leading to the suggestion that temporary accretion disks might form around the neutron star hosted in this system.…”

Section: Discussionmentioning

confidence: 66%

High-mass X-ray binaries in the Milky Way

Walter

Lutovinov

Bozzo

et al. 2015

Astron Astrophys Rev

230

234

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High-mass X-ray binaries are fundamental in the study of stellar evolution, nucleosynthesis, structure and evolution of galaxies and accretion processes. Hard X-rays observations by INTEGRAL and Swift have broadened significantly our understanding in particular for the super-giant systems in the Milky Way, which number has increased by almost a factor of three. INTEGRAL played a crucial role in the discovery, study and understanding of heavily obscured systems and of fast X-ray transients. Most super-giant systems can now be classified in three categories: classical/obscured, eccentric and fast transient.The classical systems feature low eccentricity and variability factor of ∼ 10 3 , mostly driven by hydrodynamic phenomena occurring on scales larger than the accretion radius. Among them, systems with short orbital periods and close to Roche-Lobe overflow or with slow winds, appear highly obscured. In eccentric systems, the variability amplitude can reach even higher factors, because of the contrast of the wind density along the orbit. Four super-giant systems, featuring fast outbursts, very short orbital periods and anomalously low accretion rates, are not yet understood.Simulations of the accretion processes on relatively large scales have progressed and reproduce parts of the observations. The combined effects of wind

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Section: Discussionmentioning

confidence: 66%

High-mass X-ray binaries in the Milky Way

Walter

Lutovinov

Bozzo

et al. 2015

Astron Astrophys Rev

230

234

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“…The RXTE/ASM hardness ratio data for the source suggests that it was in the high soft state during our observations. The non-detection of radio emission within the 4 (1.6σ) (Gonzalez-Riestra et al 2004) position limit from XMMNewton observation, during the high soft X-ray state of the source suggests that there is no associated radio source for the X-ray source; however, the radio emission, if present, may be synchrotron self-absorbed at low frequency or highly variable, similar to some of the HMXBs below 1 GHz.…”

Section: Igr J16318−4848: This Transient Source Was Discovered Bymentioning

confidence: 95%

GMRT observations of the field of INTEGRAL X-ray sources - I

Pandey

Manchanda²,

Rao

et al. 2006

A&A

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Since its launch the INTEGRAL observatory has discovered a variety of hard X-ray sources in the Galactic plane. Using GMRT, we have made repeated observations of these sources to search for the radio counterparts of seventeen of them at low frequencies. The source positions were taken from the various ATEL and IAUC announcements reporting their discovery. Possible radio counterparts for seven of these sources, IGR J06074+2205, IGR J15479−4529, IGR J16479−4514, IGR J17091−3624, IGR J18027−1455, IGR J18539+0727 and IGR J21247+5058 were detected within 3σ of the positional uncertainty derived from the INTEGRAL observations. The offset in the radio position was calculated using the positions mentioned in the ATEL. We have also analyzed the available NVSS images for some of these fields at 1.4 GHz along with our observations. In this paper we present the radio images and the best fit positions for the positive detections. The X-ray variability for some of the sources within the time scales of 100 s to 1 ks as seen in the RXTE/PCA light curves suggests their Galactic origin and possible binary nature. We discuss briefly the characteristics of these sources from the available information at different wave bands.

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“…However, transient SGXB with intensity dynamic ranges of 10 3−4 have been discovered (e.g. González-Riestra et al 2004;Smith et al 2006). These sources of low quiescent luminosities challenge the classical view of SGXB.…”

Section: Introductionmentioning

confidence: 99%

INTEGRAL andXMM-Newton observations of AX J1845.0-0433

Heras¹,

Walter²

2008

A&A

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Aims. AX J1845.0−0433 is a transient high-mass X-ray binary discovered by ASCA. The source displays bright and short flares observed by INTEGRAL. The transient behaviour and bright and short flares are studied to understand both the accretion mechanisms and nature of the source. Methods. Public INTEGRAL data and a pointed XMM-Newton observation are used to study in detail the flaring and quiescent phases. Results. AX J1845.0−0433 is a persistent X-ray binary with a O9.5I supergiant companion, emitting at a low 0.2−100 keV luminosity of ∼1035 erg s −1 with seldom flares and reaching luminosities of 10 36 erg s −1 . The most accurately measured X-ray position is RA (2000) = 18 h 45 m 01.4 s and Dec = −04• 33 57.7 (2 ). Variability factors of 50 are observed on timescales as short as hundreds of seconds. The broad-band spectrum is typical of wind-fed accreting pulsars with an intrinsic absorption of N H = (2.6±0.2)×10 22 cm −2 , a hard continuum of Γ = (0.7−0.9) ± 0.1, and a high-energy cutoff at E cut = 16 +5 −3 keV. An excess at low energies is also observed fitted with a black body with a temperature of kT = 0.18 ± 0.05 keV. Optically-thin and highly-ionised iron (Fe XVIII−XIX) located close to the supergiant star is detected during the quiescence phase. The spectral shape of the X-ray continuum remains unchanged. In contrast to the persistent quiescent emission, the flare characteristics suggest that clumps of mass M ∼ 10 22 g are formed within the stellar wind of the supergiant companion.

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XMM-Newton observations of the INTEGRAL X-ray transient IGR J17544-2619

Cited by 52 publications

References 18 publications

High-mass X-ray binaries in the Milky Way

High-mass X-ray binaries in the Milky Way

GMRT observations of the field of INTEGRAL X-ray sources - I

INTEGRAL andXMM-Newton observations of AX J1845.0-0433

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