Spectroscopy of Hard X-ray Identi
|National Observatory of Athens|
Spectra of hard-x-ray selected AGN from XMM, selected to help constrain the dark matter halo masses of X-ray AGN as a function of redshift and luminosity
An object whose
ANCILLARY_TARGET2 value includes one or more of the bitmasks in the following table was targeted for spectroscopy as part of this ancillary target program. See SDSS bitmasks to learn how to use these values to identify objects in this ancillary target program.
|Program (bit name)||Bit number||Target Description||Number of Fibers||Number of Unique Primary Objects|
|XMMSDSS||11||Hard x-ray-selected AGN from XMM||25||25|
This sample, identified with the
XMMSDSS target class, was designed to spectroscopically confirm hard (2 – 10 keV) X-ray selected AGN identified in the serendipitous XMM survey of SDSS (Georgakakis & Nandra 2011). These objects tend to lie at relatively low redshift, z < 0.8. The completed program was designed to yield a large spectroscopic sample of luminous X-ray AGN at z < 0.8.
The cross-correlation measurement of those AGN with the SDSS and BOSS galaxy samples will constrain the dark matter halo masses of X-ray AGN as a function of redshift and luminosity.
Objects identified by the
XMMSDSS target class were selected with fX(2 – 10 keV) > 4 x 10-14 erg s-1 cm-2 and SDSS rmodel < 22. There was of order one target per square degree.
Georgakakis, A., & Nandra, K. 2011, MNRAS, 414, 992