J/AJ/130/873 Properties of BQS objects in the SDSS DR3 area (Jester+, 2005)
The Sloan Digital Sky Survey view of the Palomar-Green Bright Quasar Survey.
Jester S., Schneider D.P., Richards G.T., Green R.F., Schmidt M.,
Hall P.B., Strauss M.A., Vanden Berk D.E., Stoughton C., Gunn J.E.,
Brinkmann J., Kent S.M., Smith J.A., Tucker D.L., Yanny B.
<Astron. J., 130, 873-895 (2005)>
=2005AJ....130..873J 2005AJ....130..873J
ADC_Keywords: QSOs ; Photometry, SDSS ; Photometry, ugriz
Keywords: catalogs - galaxies: active - quasars: emission lines -
quasars: general - surveys
Abstract:
We investigate the extent to which the Palomar-Green (PG) Bright
Quasar Survey (BQS) is complete and representative of the general
quasar population by comparing it with imaging and spectroscopy from
the Sloan Digital Sky Survey (SDSS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 117 52 Properties of BQS objects in the SDSS DR3 area
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See also:
II/207 : Palomar-Green catalog UV-excess stellar objects (Green+ 1986)
II/259 : The SDSS Photometric Catalog, Release 3 (Abazajian+ 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- PG PG (Palomar-Green) name
9- 10 I2 h RAh Hour of Right Ascension (J2000.0)
12- 13 I2 min RAm Minute of Right Ascension (J2000.0)
15- 19 F5.2 s RAs Second of Right Ascension (J2000.0)
20 A1 --- DE- Sign of the Declination (J2000.0)
21- 22 I2 deg DEd Degree of Declination (J2000.0)
24- 25 I2 arcmin DEm Arcminute of Declination (J2000.0)
27- 31 F5.2 arcsec DEs Arcsecond of Declination (J2000.0)
33- 37 F5.2 mag umag SDSS u magnitude
39- 43 F5.2 mag gmag SDSS g magnitude
45- 49 F5.2 mag rmag SDSS r magnitude
51- 55 F5.2 mag imag SDSS i magnitude
57- 61 F5.2 mag Bmag1 PG B magnitude (measured)
63- 67 F5.2 mag Bmag2 B magnitude (calculated from SDSS photometry)
69- 73 F5.2 mag (U-B)1 ? PG (U-B) color index
75- 79 F5.2 mag (U-B)2 (U-B) color index
81- 84 I4 --- phFlg SDSS photometry flag (1)
86- 89 I4 --- tFlg SDSS target flag (2)
91- 94 I4 --- Plate ? Plate number
96-100 I5 --- ObsDate ? Date of observation in MJD (JD-2400000.5)
103-105 I3 --- Fiber ? Fiber number
107-111 F5.3 --- z1 ? SDSS redshift
113-117 F5.3 --- z2 BQS redshift
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Note (1): Set of flags that give additional information about SDSS photometry
selection in the BEST version of the photometric catalogs. Phot
contains information (in this order) on whether the source was:
a point source, saturated in any of the SDSS bands, had a fatal
cosmetic error in quasar target selection, and had a nonfatal cosmetic
error in quasar target selection.
Note (2): Set of flags that give additional information about SDSS target
selection in the BEST version of the photometric catalogs. Target
contains information on whether the object was:
- flagged as a quasar candidate by color selection but is too bright to be
observed with the spectrograph,
- targeted as FIRST (Cat. VIII/71) source,
- targeted by color selection,
- and finally a "completeness" flag (This completeness flag is the logical
OR of the flags indicating a fatal or nonfatal cosmetic error, of those
identifying the object as color- or FIRST- selected target, and of the
flag indicating a color-selected target that is too bright for inclusion
in the spectroscopic survey):
--> 0 if an object had neither been recognized as a quasar target nor
rejected only because of cosmetic problems, causing the object to be
missed by SDSS target selection;
--> 1 for all objects in the table, indicating that every BQS quasar was
either targeted or we understand why it was not targeted.
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 27-Oct-2005