Browsing by Author "Brusa, M."

Now showing 1 - 5 of 5
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    NuSTAR. reveals the extreme properties of the super-Eddington accreting supermassive black hole in PG. 1247+267
    (2016) Lanzuisi, G.; Perna, M.; Comastri, A.; Cappi, M.; Dadina, M.; Marinucci, A.; Masini, A.; Matt, G.; Vagnetti, F.; Bauer, Franz Erik; Vignali, C.; Ballantyne, D.; Boggs, S.; Brandt, W.; Brusa, M.; Craig, W.; Ricci, Claudio
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    SPIDERS: selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys
    (OXFORD UNIV PRESS, 2017) Dwelly, T.; Salvato, M.; Merloni, A.; Brusa, M.; Buchner, J.; Anderson, S. F.; Boller, Th.; Brandt, W. N.; Budavari, T.; Clerc, N.; Coffey, D.; Del Moro, A.; Georgakakis, A.; Green, P. J.; Jin, C.; Menzel, M. L.; Myers, A. D.; Nandra, K.; Nichol, R. C.; Ridl, J.; Schwope, A. D.; Simm, T.
    SPIDERS (SPectroscopic IDentification of eROSITA Sources) is a Sloan Digital Sky Survey IV (SDSS-IV) survey running in parallel to the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) cosmology project. SPIDERS will obtain optical spectroscopy for large numbers of X-ray-selected active galactic nuclei (AGN) and galaxy cluster members detected in wide-area eROSITA, XMM-Newton and ROSAT surveys. We describe the methods used to choose spectroscopic targets for two sub-programmes of SPIDERS X-ray selected AGN candidates detected in the ROSAT All Sky and the XMM-Newton Slew surveys. We have exploited a Bayesian cross-matching algorithm, guided by priors based on mid-IR colourmagnitude information from the Wide-field Infrared Survey Explorer survey, to select the most probable optical counterpart to each X-ray detection. We empirically demonstrate the high fidelity of our counterpart selection method using a reference sample of bright welllocalized X-ray sources collated from XMM-Newton, Chandra and Swift-XRT serendipitous catalogues, and also by examining blank-sky locations. We describe the down-selection steps which resulted in the final set of SPIDERS-AGN targets put forward for spectroscopy within the eBOSS/TDSS/SPIDERS survey, and present catalogues of these targets. We also present catalogues of similar to 12 000 ROSAT and similar to 1500 XMM-Newton Slew survey sources that have existing optical spectroscopy from SDSS-DR12, including the results of our visual inspections. On completion of the SPIDERS programme, we expect to have collected homogeneous spectroscopic redshift information over a footprint of similar to 7500 deg(2) for > 85 per cent of the ROSAT and XMM-Newton Slew survey sources having optical counterparts in the magnitude range 17 < r < 22.5, producing a large and highly complete sample of bright X-ray-selected AGN suitable for statistical studies of AGN evolution and clustering.
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    The MUSE view of He 2-10: No AGN ionization but a sparkling starburst
    (2017) Cresci, G.; Vanzi, Leonardo; Telles, E.; Lanzuisi, G.; Brusa, M.; Mingozzi, M.; Sauvage, M.; Johnson, K.
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    The WISSH quasars project : IX. Cold gas content and environment of luminous QSOs at z ∼2.4-4.7
    (2021) Bischetti, M.; Feruglio, C.; Piconcelli, E.; Duras, F.; Perez-Torres, M.; Herrero, R.; Venturi, Giacomo; Carniani, S.; Bruni, G.; Gavignaud, I.; Testa, V.; Bongiorno, A.; Brusa, M.; Circosta, C.; Cresci, G.; D'Odorico, V.; Maiolino, R.; Marconi, A.; Mingozzi, M.; Pappalardo, C.; Perna, M.; Traianou, E.; Travascio, A.; Vietri, G.; Zappacosta, L.; Fiore, F.
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    The XMM deep survey in the CDF-S IX. An X-ray outflow in a luminous obscured quasar at z ≈ 1.6
    (2015) Vignali, C.; Iwasawa, K.; Comastri, A.; Gilli, R.; Lanzuisi, G.; Ranalli, P.; Cappelluti, N.; Mainieri, V.; Georgantopoulos, I.; Bauer, Franz Erik; Fritz, J.; Brusa, M.; Brandt, W.; Carrera, F.; Fiore, F.; Tombesi, F.