X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature

Details X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature

2003-12-15

arxiv.org/abs/astro-ph/0312377v2

Astron.Astrophys. 416 (2004) 311-318

Astronomy and Astrophysics

Astrophysics

accepted by A&A, minor adjustments incorporated from copy editing process

Scientific paper

10.1051/0004-6361:20034266

SAX J1747.0-2853 is an X-ray transient which exhibited X-ray outbursts yearly between 1998 and 2001, and most probably also in 1976. The outburst of 2000 was the longest and brightest. We have analyzed X-ray data sets that focus on the 2000 outburst and were obtained with BeppoSAX, XMM-Newton and RXTE. The data cover unabsorbed 2--10 keV fluxes between 0.1 and 5.3 X 10^-9 erg/s/cm^2. The equivalent luminosity range is 6 X 10^35 to 2 X 10^37 erg/s. The 0.3--10 keV spectrum is well described by a combination of a multi-temperature disk blackbody, a hot Comptonization component and a narrow Fe-K emission line at 6.5 to 6.8 keV with an equivalent width of up to 285 eV. The hydrogen column density in the line of sight is (8.8+/-0.5) X 10^22 cm^-2. The most conspicuous spectral changes in this model are represented by variations of the temperature and radius of the inner edge of the accretion disk, and a jump of the equivalent width of the Fe-K line in one observation. Furthermore, 45 type-I X-ray bursts were unambiguously detected between 1998 and 2001 which all occurred during or close to outbursts. We derive a distance of 7.5+/-1.3 kpc which is consistent with previous determinations. Our failure to detect bursts for prolonged periods outside outbursts provides indirect evidence that the source returns to quiescence between outbursts and is a true transient.

Affiliated with

Also associated with

No associations

Rating

X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray spectral evolution of SAX J1747.0-2853 during outburst activity and confirmation of its transient nature will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-101950