We present a preliminary analysis of an XMM-Newton observation of the sigma Orionis cluster centered on the O9.5V star sigma Ori. In addition to the EPIC image, which shows the presence of about 240 sources, mostly low-mass PMS stars belonging to the cluster, a high statistics RGS spectrum is obtained for the central source. The EPIC image shows the presence of nearby sources, including a flaring one, which, although weaker, may contaminate the RGS spectrum of the central star. We present an analysis of the RGS and EPIC spectra of sigma Ori and of the EPIC spectra of the nearby sources and we discuss the possible contamination of the hot star RGS spectrum by the other sources.
High Resolution X-ray Spectroscopy with XMM-Newton and Chandra
- Pub Date:
- December 2002