SDSS QUASARS IN THEWISEPRELIMINARY DATA RELEASE AND QUASAR CANDIDATE SELECTION WITH OPTICAL/INFRARED COLORS
نویسندگان
چکیده
منابع مشابه
Optical selection of quasars: SDSS and LSST
Over the last decade, quasar sample sizes have increased from several thousand to several hundred thousand, thanks mostly to SDSS imaging and spectroscopic surveys. LSST, the next-generation optical imaging survey, will provide hundreds of detections per object for a sample of more than ten million quasars with redshifts of up to about seven. We briefly review optical quasar selection technique...
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متن کاملThe Optical / Near - IR Colors of Broad Absorption Line Quasars , Including the Candidate Radio - Loud BAL Quasar 1556 + 3517
A candidate radio-loud broad absorption line quasar (RLBAL) has been reported by Becker et al. (1997). We present JHK observations of this object and three other radiodetected BALs taken with the new Michigan-Dartmouth-MIT/Ohio State/Aladdin IR Camera (MOSAIC) on the KPNO 4-meter. The candidate RLBAL 1556+3517 has B−K=6.63, redder than all but one or two known z>1 quasars. This strongly suggest...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 2012
ISSN: 0004-6256,1538-3881
DOI: 10.1088/0004-6256/144/2/49