XMM-Newton Results on the Ultracompact Low Mass X-Ray Binary 4U 1850-087 in the Globular Cluster NGC 6712
Abstract
We report on preliminary results from our XMM- Newton observation of the Low Mass X-ray Binary 4U 1850-087, located in the galactic globular clus- ter NGC 6712. It is an ultracompact binary system, with an orbital period of 20.6 min. In previous low- resolution X-ray observations 4U 1850-087 displayed a soft excess residual around 0.7 keV, possibly indica- tive of the presence of a high Ne/O ratio, as already found in other three ultracompact LMXBs contain- ing a neutron star (4U 0614+091, 4U 0918-549, and 4U 1543-624). We discuss here our preliminary anal- ysis of high resolution X-ray spectra of 4U 1850-087, and timing results. Key words: X rays; X ray Binaries; individual: 4U 1850-087.
- Publication:
-
5th INTEGRAL Workshop on the INTEGRAL Universe
- Pub Date:
- October 2004
- DOI:
- 10.48550/arXiv.astro-ph/0404039
- arXiv:
- arXiv:astro-ph/0404039
- Bibcode:
- 2004ESASP.552..389S
- Keywords:
-
- Astrophysics
- E-Print:
- 2 pages, 2 figures. To be published in the Proceedings of the 5th INTEGRAL Workshop: "The INTEGRAL Universe", February 16-20, 2004, Munich