Back to Search
Start Over
The Chandra Dust Scattering Halo of Galactic Center transient Swift J174540.7-290015
The Chandra Dust Scattering Halo of Galactic Center transient Swift J174540.7-290015
- Source :
- Astrophysical Journal, 839(2). IOP Publishing Ltd.
- Publication Year :
- 2017
-
Abstract
- We report the detection of a dust scattering halo around a recently discovered X-ray transient, Swift J174540.7-290015, which in early February of 2016 underwent one of the brightest outbursts (F_X ~ 5e-10 erg/cm^2/s) observed from a compact object in the Galactic Center field. We analyze four Chandra images that were taken as follow-up observations to Swift discoveries of new Galactic Center transients. After adjusting our spectral extraction for the effects of detector pileup, we construct a point spread function for each observation and compare it to the GC field before the outburst. We find residual surface brightness around Swift J174540.7-290015, which has a shape and temporal evolution consistent with the behavior expected from X-rays scattered by foreground dust. We examine the spectral properties of the source, which shows evidence that the object transitioned from a soft to hard spectral state as it faded below L_X ~ 1e36 erg/s. This behavior is consistent with the hypothesis that the object is a low mass X-ray binary in the Galactic Center.<br />Accepted for publication in ApJ
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Point spread function
Physics
Field (physics)
010308 nuclear & particles physics
Scattering
Astrophysics::High Energy Astrophysical Phenomena
Galactic Center
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Compact star
01 natural sciences
Space and Planetary Science
0103 physical sciences
Halo
Surface brightness
Low Mass
Astrophysics - High Energy Astrophysical Phenomena
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Language :
- English
- ISSN :
- 0004637X
- Database :
- OpenAIRE
- Journal :
- Astrophysical Journal, 839(2). IOP Publishing Ltd.
- Accession number :
- edsair.doi.dedup.....65bee92bff0b4df4689e715cc31ed41c