Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-11-27
Astronomy and Astrophysics
Astrophysics
Accepted for publication in MNRAS Letters, moderate revision according to referee report, added one plot to figure 2 and inclu
Scientific paper
10.1111/j.1745-3933.2009.00655.x
The quasi-persistent neutron star X-ray transient and eclipsing binary EXO 0748-676 recently started the transition to quiescence following an accretion outburst that lasted more than 24 years. We report on two Chandra and twelve Swift observations performed within five months after the end of the outburst. The Chandra spectrum is composed of a soft, thermal component that fits to a neutron star atmosphere model with kT^inf~0.12 keV, joined by a hard powerlaw tail that contributes ~20% of the total 0.5-10 keV unabsorbed flux. The combined Chandra/Swift data set reveals a relatively hot and luminous quiescent system with a temperature of kT^inf~0.11-0.13 keV and a bolometric thermal luminosity of ~8.1E33-1.6E34 (d/7.4 kpc)^2 erg/s. We discuss our results in the context of cooling neutron star models.
Brown Edward F.
Cackett Edward M.
Degenaar Nathalie
Homan Jeroen
Jonker Peter G.
No associations
LandOfFree
Chandra and Swift observations of the quasi-persistent neutron star transient EXO 0748-676 back to quiescence 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 Chandra and Swift observations of the quasi-persistent neutron star transient EXO 0748-676 back to quiescence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra and Swift observations of the quasi-persistent neutron star transient EXO 0748-676 back to quiescence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-232978