XMM-Newton Spectroscopy of Circinus X-1

Details XMM-Newton Spectroscopy of Circinus X-1 XMM-Newton Spectroscopy of Circinus X-1

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.1204s&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #12.04; Bulletin of the American Astronomical Society, Vol. 33, p.804

Astronomy and Astrophysics

Astronomy

Scientific paper

We present results from two recent coordinated XMM-Newton/RXTE observations of the unusual LMXB Circinus X-1. Almost all of the first observation occurred during a very long (7 hr) absorption dip, while the second occurred while the source was in a much brighter (flaring) state. We compare spectra from these two states obtained with the EPIC-PN camera and the Reflection Grating Spectrometers on XMM. For example, the absorption-dip spectra show very prominent Fe K-alpha lines from different ionization species, while the lines are not apparent in the bright-state spectra.

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