Volume 456, Number 1, September II 2006
|Page(s)||287 - 293|
|Section||Stellar structure and evolution|
|Published online||23 August 2006|
Unveiling the nature of the highly absorbed X-ray source SAX J1748.2-2808 with XMM-Newton
Istituto di Astrofisica Spaziale e Fisica Cosmica - Sezione di Milano – INAF-IASF, 20133 Milano, Italy e-mail: firstname.lastname@example.org
2 Research and Scientific Support Department of ESA, ESTEC, Postbus 299, 2200 AG Noordwijk, The Netherlands
3 Science Payload and Advanced Concepts Office, ESA, ESTEC, Postbus 299, 2200 AG, Noordwijk, The Netherlands
Accepted: 6 June 2006
We report on the results of an EPIC XMM-Newton observation of the faint source SAX J1748.2-2808 and the surrounding field. This source was discovered during the BeppoSAX Galactic center survey performed in 1997–1998. A spatial analysis resulted in the detection of 31 sources within the EPIC field of view. SAX J1748.2-2808 is clearly resolved into 2 sources in EPIC images with the brighter contributing almost 80% of the 2–10 keV flux. Spectral fits to this main source are consistent with an absorbed power-law with a photon index of and absorption equivalent to cm-2 together with an iron line at keV with an equivalent width of eV. The significantly better statistics of the XMM-Newton observation, compared with BeppoSAX, allows to exclude a thermal nature for the X-ray emission. A comparison with other observations of SAXJ1748.2-2808 does not reveal any evidence for spectral or intensity long-term variability. Based on these properties we propose that the source is a low-luminosity high-mass X-ray binary located in the Galactic center region.
Key words: Galaxy: center / X-rays: stars / X-rays: individual: SAX J1748.2-2808
© ESO, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.