First Chandra observation of the ultra-compact X-ray binary 4U~1850--087 during its high luminosity state

Details First Chandra observation of the ultra-compact X-ray binary 4U~1850--087 during its high luminosity state First Chandra observation of the ultra-compact X-ray binary 4U~1850--087 during its high luminosity state

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2367a&link_type=abstract

Chandra Proposal ID #09400380

Physics

Chandra Proposal Id #09400380

Scientific paper

4U~1850--087 is a candidate ultra-compact X-ray binary. A soft excess near 0.7 keV has been reported for this source with ASCA and interpreted as due to neutral Ne-rich material local to the binary. Recent XMM-Newton and Chandra observations of the source at low X-ray luminosity do not confirm the ASCA results and therefore different physical interpretations are possible. We propose at 30 ks Chandra LETGS observation of this source during its high luminosity state in order to understand how the luminosity affects the abundances observed in the X-ray spectrum.

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