Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/150798
Title: | Chandra observations of the gamma-ray binary LSI+61303: extended X-ray Structure? |
Author: | Paredes i Poy, Josep Maria Ribó Gomis, Marc Bosch i Ramon, Valentí West, Jennifer R. Butt, Yousaf M. Torres, Diego F. Martí, Josep |
Keywords: | Raigs X Raigs gamma Observacions astronòmiques X-rays Gamma rays Astronomical observations |
Issue Date: | 11-Jul-2007 |
Publisher: | Institute of Physics (IOP) |
Abstract: | We present a 50 ks observation of the gamma-ray binary LS I +61 303 carried out with the ACIS-I array aboard the Chandra X-Ray Observatory. This is the highest resolution X-ray observation of the source conducted so far. Possible evidence of an extended structure at a distance between 5' and 12' toward the north of LS I +61 303 has been found at a significance level of 3.2 σ. The asymmetry of the extended emission excludes an interpretation in the context of a dust-scattered halo, suggesting an intrinsic nature. On the other hand, while the obtained source flux of F0.3-10keV=7.1+1.8-1.4×10-12 ergs cm-2 s-1 and hydrogen column density NH=(0.70+/-0.06)×1022 cm-2 are compatible with previous results, the photon index Γ=1.25+/-0.09 is the hardest ever found. In light of these new results, we briefly discuss the physics behind the X-ray emission, the location of the emitter, and the possible origin of the extended emission ~0.1 pc away from LS I +61 303. |
Note: | Reproducció del document publicat a: https://doi.org/10.1086/520674 |
It is part of: | Astrophysical Journal, 2007, vol. 664, num. 1, p. L39-L42 |
URI: | http://hdl.handle.net/2445/150798 |
Related resource: | https://doi.org/10.1086/520674 |
ISSN: | 0004-637X |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
551374.pdf | 100.18 kB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.