The stellar population in the XMM-Newton slew survey

Stelzer, B.; López-Santiago, J.; Saxton, R.; Garcia-Alvarez, D.
Referencia bibliográfica

The X-ray Universe 2014, edited by Jan-Uwe Ness. Online at http://xmm.esac.esa.int/external/xmm_science/workshops/2014symposium/, id.321

Fecha de publicación:
7
2014
Número de autores
4
Número de autores del IAC
1
Número de citas
0
Número de citas referidas
0
Descripción
We study X-ray transients from the XMM-Newton slew catalog with focus on the identification of flare stars. We have selected 118 variable X-ray sources from the XMM-Newton slew catalog Delta-3 on the basis of at least 70-fold enhanced count rate with respect to ROSAT. Our characterization of the counterparts includes a systematic cross-match with optical and infrared photometric catalogs. The photometry was used to identify candidate stars for spectroscopic follow-up. Optical low-resolution spectra were obtained for 34 of those objects with OSIRIS@GranTeCan, most of them without any previous spectroscopic data. Among these objects we find many M-type stars, some giant stars and a small number of extragalactic sources. We present here the X-ray, optical and near-infrared properties of all slew transients from our sample together with the statistics of the various source populations.