AllWISE counterparts to ROSAT and XMMSlew surveys done using NWAY (An accurate algorithm to pair sources simultaneously between N catalogs)
Abstract
At the end of the mission, the eROSITA All-sky X-ray survey will provide the community with about 4 million of point-like sources, down to a limit of 10^{-14} erg/cm^2/s in the soft band and 2x10^{-13} erg/cm^2/s in the hard band. The brightest sources however have been already observed by ROSAT, but have been rarely used due to the large uncertainties in their positions, thus making the identification of their right multi-wavelength counterparts a demanding task with uncertain results. New all-sky Optical and IR surveys like GAIA and WISE allow us, for the first time, to provide reliable counterparts to all ROSAT sources, thanks also to the development of a new algorithm, NWAY, based on Bayesian statistic and adoption of color-magnitude priors. This paves the way to new programs of complete characterization of the bright X-ray sky, such as the SDSS-IV/SPIDERS survey started in 2014. In this talk I will briefly present the code and the multiwavelength properties of ROSAT and XMMSLEW counterparts.
- Publication:
-
The X-ray Universe 2017
- Pub Date:
- October 2017
- Bibcode:
- 2017xru..conf..199S