XMM observations of the dipping LMXB XB 1323-619
Abstract
We present results of spectral and timing analysis of XMM observations of the dipping, bursting LMXB XB 1323-619. 5 full dips were obtained, together with 7 X-ray bursts, at least two of which occurred during dips. Dipping was strong, close to 100% deep in the band 0.5 - 3.0 keV, allowing determination of the orbital period. From the PN lightcurve, a period of 2.96 ± 0.05 hr was obtained, consistent with that found previously using the satellites BeppoSAX and RXTE. Strong absorption was not detected for the bursts in dips consistent with strong ionization of the absorber by the bursts, an effect previously observed with SAX data. The continuum spectrum of the persistent emission is well-fitted with a two-component model consisting of a blackbody with temperature 1.2 keV and a power law with photon index 1.8. New spectral features were discovered: a strong emission line at 1 keV with FWHM of 120 eV, and several absorption features including an absorption line at 6.6 keV with FWHM of 100 eV identified with the Fe XXIII K alpha line. Other absorption features at 7.3 keV and 7.8 keV will also be discussed.
- Publication:
-
35th COSPAR Scientific Assembly
- Pub Date:
- 2004
- Bibcode:
- 2004cosp...35.4229R