Quasars in the COSMOS Field
Author(s) -
M. Prescott,
C. D. Impey,
R. J. Cool,
N. Z. Scoville
Publication year - 2006
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/503325
Subject(s) - quasar , physics , astrophysics , redshift , ovv quasar , sky , astronomy , galaxy , supermassive black hole
We obtained medium-resolution spectra of 336 quasar candidates in the COSMOSHST/Treasury field using the MMT 6.5-meter telescope and the Hectospecmulti-object spectrograph. Candidates were drawn from the Sloan Digital SkySurvey (SDSS) DR1 catalog using quasar flags set by the SDSS multi-color quasartarget selection algorithm. In this paper we present our discovery spectra from1.39 square degrees (69.5% of the COSMOS field) and a discussion of theselection method and yields. We confirmed 95 quasars, including at least 2BALs; 80 of these are new quasars that do not appear in previous quasarconfirmation follow-up studies. The candidates additionally included 184compact emission-line galaxies, a third of which are likely Type 2 AGN, and 12stars. The quasars span a range in magnitude of 18.3
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