The SPIDERS-AGN targeting strategy, has been designed
to collect about 40 000 spectra of X-ray AGN, and to bring
population studies of accreting super-massive black holes to
a new level of accuracy. First demonstrations of the SPIDERS
science applications, based on the BOSS follow-up
of X-ray selected AGN in the Northern XMM-XXL field,
were presented by Menzel et al. (2016) and Liu et al. (2016).
We present in this webpage the first phase of the SPIDERS-AGN
programme (a.k.a. `Tier-0') which exploits existing
(pre-eROSITA) all-sky X-ray source catalogues to explore
the bright end of the X-ray AGN population.
The detailed descriptions and discussion for these results are presented in Dwelly et al. 2017 .
Sky distribution of the X-ray source samples considered
in this paper. Top panel: RASS source density map gridded
with a HEALPix pixelisation
and displayed with an Equatorial Hammer-Aitoff projection. The
density variations (and holes) are primarily due to the variations
in effective exposure time and background count rate during the
ROSAT survey. Bottom panel: Same for the XMMSL sources, but
shown with a coarser pixel scale.
Note the differences in the greyscale ranges. The (solid blue) line
indicates the perimeter of the BOSS imaging footprint.
The catalog provides BH masses, line fluxes and more for about 8000 sources. The details are presented in Coffey et al 2019
The catalog DR14 related to the paper can be found here
The catalogue of SPIDERS_RASS_AGN targets within the BOSS imaging footprint that have been put forward for observation during the SDSS-IV eBOSS/TDSS/SPIDERS survey. These targets have been selected by associating 1RXS detections (BSC+FSC, Voges et al., 1999, Voges et al., 2000), firstly with mid-IR AllWISE counterparts (Cutri et al., 2013), selected by mean of a new Bayesian code, NWAY (Salvato et al., 2017, in prep). The mid-IR positions where then used to choose counterparts from within the SDSS-DR13photo catalogue (Albareti et al., 2017, submitted). The target catalogue has been filtered to remove objects having existing (SDSS-DR12) spectroscopy, objects near very bright stars, and objects that themselves are too bright or too faint for SDSS observation (fiber2mag_i<17.0 or fiber2mag_i>22.5 AB). Note that only those targets which fall within the final footprint of the eBOSS/TDSS/SPIDERS survey will have a chance to be observed in SDSS-IV.
A catalogue of SPIDERS_XMMSL_AGN targets within the BOSS imaging footprint that have been put forward for observation during the SDSS-IV eBOSS/TDSS/SPIDERS survey. These targets have been selected by associating XMM-Newton Slew Survey sources (release 1.6, 2014 Feb. 26, Saxton et al., 2008), firstly with mid-IR AllWISE counterparts (Cutri et al., 2013), selected by mean of a new Bayesian code, NWAY (Salvato et al., 2017, in prep). The mid-IR positions where then used to choose counterparts from within the SDSS-DR13photo catalogue (Albareti et al., submitted). The target catalogue has been filtered to remove duplicate X-ray detections of unique sources, objects having existing (SDSS-DR12) spectroscopy, objects near very bright stars, and objects that themselves are too bright or too faint for SDSS observation (fiber2mag_i<17.0 or fiber2mag_i>22.5 AB). Note that only those targets which fall within the final footprint of the eBOSS/TDSS/SPIDERS survey will have a chance to be observed in SDSS-IV.
A catalogue of SPIDERS_RASS_AGN targets within the BOSS imaging footprint that have been put forward for observation during the SDSS-III SEQUELS survey (a limited area prototype of the eBOSS/TDSS/SPIDERS survey). These targets have been selected by associating 1RXS detections (BSC+FSC, Voges et al., 1999, Voges et al., 2000) directly to the SDSS-DR8 photometric catalogue (Aihara et al., 2011). The target catalogue has been filtered to remove objects having existing (SDSS-DR11) spectroscopy, objects near very bright stars, objects in the AGN catalogue of Veron-Cetty and Veron, 2010, and objects that themselves are too bright or too faint for SDSS observation (modelmag_r<17.0 or modelmag_r>22.0 AB). Note that only those targets which fall within the final SEQUELS footprint had a chance to be observed in SDSS-III.
A catalogue of 1RXS sources in the BOSS imaging footprint which have spectroscopy in SDSS-DR12. The X-ray sources have been associated with optical photometric counterparts via the AllWISE catalogue, as described above. The catalogue includes visual inspection information (compiled from the literature and from SPIDERS team members) for each spectrum.
A catalogue of 1RXS sources in the BOSS imaging footprint which have spectroscopy in SDSS-DR12. The X-ray sources have been associated with optical photometric counterparts via the AllWISE catalogue, as described above. The catalogue includes visual inspection information (compiled from the literature and from SPIDERS team members) for each spectrum.
