J/AJ/141/105 NIR-matched quasar catalog (Peth+, 2011)
Near-infrared photometric properties of 130,000 quasars:
an SDSS-UKIDSS-matched catalog.
Peth M.A., Ross N.P., Schneider D.P.
<Astron. J., 141, 105 (2011)>
=2011AJ....141..105P 2011AJ....141..105P
ADC_Keywords: Surveys ; QSOs ; Photometry, infrared ; Photometry, SDSS
Keywords: catalogs - quasars: general
Abstract:
We present a catalog of over 130000 quasar candidates with
near-infrared (NIR) photometric properties, with an areal coverage of
approximately 1200deg2. This is achieved by matching the Sloan
Digital Sky Survey (SDSS) in the optical ugriz bands to the UKIRT
Infrared Digital Sky Survey (UKIDSS) Large Area Survey (LAS) in the
NIR YJHK bands. We match the ∼1 million SDSS DR6 Photometric Quasar
catalog to Data Release 3 of the UKIDSS LAS (ULAS) and produce a
catalog with 130827 objects with detections in one or more NIR bands,
of which 74351 objects have optical and K-band detections and 42133
objects have the full nine-band photometry.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 359 172186 NIR-matched quasar catalog
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See also:
II/310 : UKIDSS-DR7 Large Area Survey (Lawrence+ 2011)
II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Seq [1/172186]+ Internal catalog object number
8- 25 A18 --- Name IAU format object name (JHHMMSS.ss+DDMMSS.s)
27- 44 A18 --- SDSS SDSS Database ID
46- 57 A12 --- ULAS ?=-1 UKIDSS/ULAS-DR3 MergedSource Database ID
59- 66 F8.4 deg RAdeg Right Ascension from SDSS (J2000)
68- 74 F7.4 deg DEdeg Declination from SDSS (J2000)
76- 84 F9.4 arcsec dRA ?=-999. RA difference between SDSS & UKIDSS
86- 94 F9.4 arcsec dDE ?=-999. Dec difference between SDSS & UKIDSS
96-102 F7.4 arcsec d [0,1]?=-1 Angular distance between matching SDSS
and UKIDSS objects (sqrt[(dA*cos(DE))2+dDE2])
104-110 F7.4 mag umag SDSS u band PSF magnitude in AB system
112-117 F6.4 mag e_umag Error in umag
119-125 F7.4 mag gmag SDSS g band PSF magnitude in AB system
127-132 F6.4 mag e_gmag Error in gmag
134-140 F7.4 mag rmag SDSS r band PSF magnitude in AB system
142-147 F6.4 mag e_rmag Error in rmag
149-155 F7.4 mag imag SDSS i band PSF magnitude in AB system
157-162 F6.4 mag e_imag Error in imag
164-170 F7.4 mag zmag SDSS z band PSF magnitude in AB system
172-177 F6.4 mag e_zmag Error in zmag
179-190 E12.5 mag Ymag [-1/27]?=-9.99999E+08 or -1 UKIDSS/Y band
2"-aperture magnitude in Vega
192-203 E12.5 mag e_Ymag [-1/10]?=-9.99999E+08 or -1 Error in Ymag
205-216 E12.5 mag Jmag [-1/27]?=-9.99999E+08 or -1 UKIDSS/J band
2"-aperture magnitude in Vega
218-229 E12.5 mag e_Jmag [-1/10]?=-9.99999E+08 or -1 Error in Jmag
231-242 E12.5 mag Hmag [-1/27]?=-9.99999E+08 or -1 UKIDSS/H band
2"-aperture magnitude in Vega
244-255 E12.5 mag e_Hmag [-1/10]?=-9.99999E+08 or -1 Error in Hmag
257-268 E12.5 mag Kmag [-1/27]?=-9.99999E+08 or -1 UKIDSS/K band
2"-aperture magnitude in Vega
270-281 E12.5 mag e_Kmag [-1/10]?=-9.99999E+08 or -1 Error in Kmag
283-289 F7.4 mag Ylim ?=-1 Nominal 5σ Y band depth
291-297 F7.4 mag Jlim ?=-1 Nominal 5σ J band depth
299-305 F7.4 mag Hlim ?=-1 Nominal 5σ H band depth
307-313 F7.4 mag Klim ?=-1 Nominal 5σ K band depth
315-321 F7.4 --- zph ?=-1 Photometric Redshift
323-329 F7.4 --- b_zph ?=-1 Lower limit on zph
331-337 F7.4 --- B_zph ?=-1 Upper limit on zph
339-345 F7.4 --- Prob [0,1]?=-1 Probability zph is accurate
347-353 F7.4 --- zsp ?=-1 Spectroscopic Redshift
355-359 F5.3 mag E(B-V) Galactic Extinction
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 01-Aug-2012