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J/AJ/136/2373       Type 2 quasars from SDSS                 (Reyes+, 2008)

Space density of optically selected type 2 quasars. Reyes R., Zakamska N.L., Strauss M.A., Green J., Krolik J.H., Shen Y., Richards G.T., Anderson S.F., Schneider D.P. <Astron. J., 136, 2373-2390 (2008)> =2008AJ....136.2373R
ADC_Keywords: QSOs ; Active gal. nuclei ; Photometry, SDSS ; Radio sources Keywords: galaxies: active - quasars: emission lines - quasars: general - surveys Abstract: Type 2 quasars are luminous active galactic nuclei whose central regions are obscured by large amounts of gas and dust. In this paper, we present a catalog of type 2 quasars from the Sloan Digital Sky Survey, selected based on their optical emission lines. The catalog contains 887 objects with redshifts z<0.83; this is 6 times larger than the previous version and is by far the largest sample of type 2 quasars in the literature. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 132 887 Catalog of 887 optically-selected type 2 quasars
See also: J/AJ/126/2125 : SDSS candidate type II quasars (Zakamska+, 2003) II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) http://www.sdss.org/ : SDSS Home Page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 F10.6 deg RAdeg Right ascension in decimal degrees (J2000) 12- 21 F10.6 deg DEdeg Declination in decimal degrees (J2000) 23- 28 F6.4 --- z Redshift 30- 34 F5.2 [Lsun] LO3g Gaussian fit [OIII] 5007 luminosity 36- 40 F5.2 [Lsun] LO3np Non-parametric fit [OIII] 5007 luminosity 42- 45 I4 --- Plate SDSS Spectroscopic plate number 47- 49 I3 --- Fiber SDSS Fiber ID 51- 55 I5 d MJD SDSS Modified Juilian Date 57- 61 I05 --- Tcode Target Code (1) 63- 70 F8.2 mJy S20cm ?=-1. Peak 20cm flux in units of mJy/beam (2) 72- 77 F6.3 mJy e_S20cm ?=-1. Mean-Square of S20cm (2) 79- 83 F5.2 mag umag SDSS u-band PSF magnitude (3) 85- 89 F5.2 mag gmag SDSS g-band PSF magnitude (3) 91- 95 F5.2 mag rmag SDSS r-band PSF magnitude (3) 97-101 F5.2 mag imag SDSS i-band PSF magnitude (3) 103-107 F5.2 mag zmag SDSS z-band PSF magnitude (3) 109-112 F4.2 mag e_umag The 1σ uncertainty in umag 114-117 F4.2 mag e_gmag The 1σ uncertainty in gmag 119-122 F4.2 mag e_rmag The 1σ uncertainty in rmag 124-127 F4.2 mag e_imag The 1σ uncertainty in imag 129-132 F4.2 mag e_zmag The 1σ uncertainty in zmag
Note (1): Binary number: the first four digits of the target code show whether the object was targeted by the Galaxy, Low-z QSO, High-z QSO, or Serendipity FIRST algorithm (in that order). The last digit indicates whether the object belongs to the Special Southern survey. Note (2): Of the nearest match within 2" from the FIRST survey (Becker et al., 1995, See Cat. VIII/71); 0 = no match was found. -1 = object is not in the FIRST survey area. Note (3): PSF asinh magnitudes are taken from the SDSS TARGET database and corrected for Galactic extinction (Schlegel et al., 1998ApJ...500..525S).
History: From electronic version of the journal References: Zakamska et al., Paper I 2003AJ....126.2125Z, Cat J/AJ/126/2125
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 26-May-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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