The million quasar (MILLIQUAS) catalogue version 2.1 (2010) Eric Flesch, 17 August 2010 ================================================================================ This is a compendium of all quasars, AGN, and Bl Lacs in the literature, published/accepted to 12 June 2010; completeness is good but not guaranteed. High-confidence (60%+) photometric NBCKDE and radio/X-ray associated objects are included, which bring the total objects to 1,099,490. Objects have been de-duplicated across catalogs, and the earliest name and best redshift is presented for each. Astrometry is fixed onto a combined APM/USNO-A optical background, and is accurate to within 1-2 arcsec, even for the earliest quasars. Note: close objects and lensed images within 2 arcsec may be represented as a single object. This edition includes 3572 new radio/X-ray associated objects, calculated from the new XMM3, XMM Slew 1.4 and XASSIST4 data using the QORG/ARXA algorithm. Version 2.1 is more careful to exclude narrow-line objects than 2.0 was, and also presents more original names of QSOs. Included objects are broad-line QSOs (core-dominated), AGNe (disk-dominated), and Bl Lacs (lobe-dominated). The format is simple, each object is shown as one line bearing the J2000 coordinates, its name, red and blue optical magnitudes, PSF class, redshift, and the source catalog for its name and redshift, plus a radio and/or X-ray identifier where applicable. Optical magnitudes are usually POSS-I E & O, or UKST R & Bj, from the APM or USNO-A (recalibrated). Current plans are to keep this updated as a "living" QSO catalogue, with once-a-year updates, and think about formal publication later. Questions/comments/praise/complaints may be directed to eric@flesch.org. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- milliquas.txt 124 1099490 The catalogue Milliquas-ReadMe.txt 80 . This file -------------------------------------------------------------------------------- Byte-by-byte Description of the Milliquas (million-quasar) file: -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 h RAh Right Ascension J2000 (hours) 3- 4 I2 min RAm Right Ascension J2000 (minutes) 5- 8 F4.1 s RAs Right Ascension J2000 (seconds) 9 A1 --- DE- Declination J2000 (sign) 10- 11 I2 deg DEd Declination J2000 (degrees) 12- 13 I2 arcmin DEm Declination J2000 (minutes) 14- 15 I2 arcsec DEs Declination J2000 (seconds) 18- 41 A24 --- name ID from the literature 43- 45 A3 --- Descrip Classification of object (1) 47- 50 F4.1 mag Rmag Red optical magnitude (2) 52- 55 F4.1 mag Bmag Blue optical magnitude (2) 57- 59 A3 --- comment Comment on optical object (3) 60 A1 --- R Red optical PSF class (4) 62 A1 --- B Blue optical PSF class (4) 64- 69 F6.3 z z Redshift from the literature. 71- 72 A2 --- cat Source catalog for name (5) 74- 75 A2 --- zcat Source catalog for redshift (5) 77- 79 I3 pct Qpct probability that this object is a QSO (6) 81-101 A21 --- Rname Radio ID, if any. 103-123 A21 --- Xname X-ray ID, if any, but can be a radio lobe if rname is a radio lobe. -------------------------------------------------------------------------------- Note (1): Classification from the Veron catalog takes precedence over others. Legend: Q = QSO from the literature, with redshift, 137641 of these. A = AGN (low-luminous or type II QSO, Seyfert, etc), 26953 of these. B = Bl Lac object, 1425 of these. q = NBCKDE photometric quasars, on average 91% likely to be quasars, 859321 of these. Redshift is rounded to 0.1z. An additional 78 are from the SWIRE survey. R = Radio association displayed. X = X-ray association displayed. 2 = Double radio lobe declaration. These lobes are displayed at the righthand end of the row if there are no other associations. 74072 optical objects are included based only on calculated radio or X-ray association. These are on average 81% likely to be quasars. Note (2): Magnitudes have been recalibrated from the original APM/USNO-A values. However, USNO-A UKST objects fainter than 18.5 can have large errors. Extended objects brighter than mag 15 can be represented as far too bright. Note (3): Legend: p = optical magnitudes are POSS-I E and O. r/b/g/i/v = optical magnitudes from the source catalog (e.g. SDSS,2QZ,etc). This is presented if object was not found in APM/USNO-A. (none of the above) = optical magnitudes are UKST R and Bj. + = variability nominally detected for both red & blue m = proper motion nominally detected. ? = inferred object - position approx (4 asec) and magnitude estimated/max. Note (4): The APM provides PSF class, the USNO-A does not. Some QSO catalogs like the SDSS give morphology which we use here for objects not found in the APM. Legend: - = stellar PSF (usually from APM) 1 = fuzzy PSF (usually from APM) 2 = extended PSF. Can be galaxies, merged stars, etc. n = no PSF available, usually USNO-A sourced. x = not seen in this color (fainter than plate depth, or confused, etc.) Note (5): Legend (with counts of name and redshift) and references: 1L (81,44): 1LAC, arXiv:1002.0150, Abdo A.A. et al, 2010, ApJ submitted 2Q/6Q (23053,20867): 2QZ and 6QZ, Croom S.M. et al, 2004,MNRAS,349,1397 2S (7928,7907): 2SLAQ, Croom S.M. et al, 2009,MNRAS,392,19 6d (0,8): 6dF Galaxy Survey, Jones D.H. et al, 2009,arXiv,0903.5451 AX (20925,0): Atlas of Radio/X-ray Associations, Flesch E.,2009,PASA accept BG (4,0): Gaston, B., 1983,ApJ,272,411 Bu (4,4): Burbidge E.M., October 2003, Keck-I LRIS, unpublished. CF (9,9): CFHIZQ, arXiv:0912.0281, Willott C. et al, 2009 Co (8,7): Lopez-Corredoira M. et al, 2008, A&A, 480, 61 CW (9,0): CWRU low-dispersion survey, Pesch P. et al, 1985-1995 misc publ. EN (1,0): ENEAR, Wegner G. et al, 2003,AJ,126,2268 HB (43,30): Hewitt A., Burbidge G., 1989,ApJS,69,1 KE (5,2): KEYFIELD, arXiv:0907.4214, Anderson M. & Filipovic M., 2009 LA (8,8): LAMOST, arXiv:1006.0143, Wu X.-B. et al, 2010 LB (1,0): LBQS, Hewett P.C., Foltz C.B., Chaffee F.H., 1995, AJ,109,1498 MQ (3572,0): MILLIQUAS, see note at top (2nd paragraph), Flesch E., 2010 MZ (1,1): MegaZLRG, Abdalla F.B. et al, 2008 arXiv:0812.3831, MNRAS submit NB (859293,855960): NBCKDE, Richards G.T. et al, 2009,ApJS,180,67 NE (903,183): NASA/IPEC Extragalactic DB, http://nedwww.ipac.caltech.edu PG (283,0): Principal Galaxy Catalogue, Paturel G. et al, 2003,A&A,412,45 QO (49297,0): QORG, Flesch E. and Hardcastle M., 2004,A&A,427,387 SL (11,11): SDSS Lens Search, arXiv:1005.5570, Inada N. et al, 2010 SM (126,125): Southern 2MASS AGN, Masci F. et al, 2010, PASA in press SQ (100490,105985): SDSS Quasar DR7, arXiv:1004.1167, Scheider et al, 2010 SDSS quasars/AGN not presented in the SDSS Quasar DR7 (above) are from previous releases on http://www.sdss.org/dr7/products/spectra/getspectra.html These are: S1 (3165,3443): SDSS Data Release 1 to 3 (combined files) S4 ( 843, 910): SDSS Data Release 4 increment S5 ( 862, 954): SDSS Data Release 5 increment S6 (1144,1194): SDSS Data Release 6 increment S7 (1356,1408): SDSS Data Release 7 increment Sa ( 270, 290): SDSS Special-a Sb ( 17, 21): SDSS Special-b Se ( 232, 265): SDSS Extra SP ( 157, 161): SDSS Quasar DR5 (Schneider et al, 2007) SR (24,24): arXiv:0909.4091, McGreer I., Helfand D., White R., 2009 SW (95,95): SWIRE-hiz, Siana B. et al, 2008, ApJ, 675, 49 VE (24934,22076): Veron 13th ed, Veron-Cetty M-P. and Veron P., 2010 yCat 7258,0 WE (37,0): Weedman D., 1985,ApJS,57,523 XB (137,138): XBSS, Caccianiga A. et al, 2008, A&A, 477, 735 XC (2,2): arXiv:1005.4692, Hilton M. et al, 2010 XM (158,160): XMSS, Barcons X. et al, 2007, A&A, 476, 1191 ZW (2,0): the Updated Zwicky Catalog, Falco E.E. et al, 1999,PASP,111,438 Note (6): 74072 objects without spectroscopic confirmation are included where of high probability. Two families of calculated objects are included: (1) 834048 NBCKDE photometric quasars without radio/X-ray association, and the displayed probability is from their catalog (qsopct), and (2) Radio/X-ray associated objects from the QORG or ARXA catalog, and 3572 first identified in this catalog. The displayed probability is calculated as described in the QORG paper, but the final correction described in section A.6.1 (page 28) has been changed to be source catalogue specific, and on average about halved from before, after comparison of QORG to subsequent SDSS finding showed we had excluded too many objects. 25273 NBCKDE objects are radio/X-ray associated, and the displayed probability figure combines the two original probabilities as P = 1/(1+((1-P1)*(1-P2))/(P1*P2)). The cut off for individual inclusion is 60%, which yields a mean probability of 91% for the NBCKDE objects, and 81% for the radio/X-ray associated-only objects. Using the probability as expected yield, these 1,099,490 objects will yield 1,010,340 actual quasars, making MILLIQUAS a true million-quasar catalog. See also: APM home page www.ast.cam.ac.uk/~apmcat USNO-A home page www.nofs.navy.mil NVSS home page www.cv.nrao.edu/nvss FIRST home page sundog.stsci.edu SUMSS home page www.astrop.physics.usyd.edu.au/SUMSS/index.html XMM-Newton home page xmmssc-www.star.le.ac.uk HRI & PSPC home page wave.xray.mpe.mpg.de/rosat/rra WGA home page wgacat.gsfc.nasa.gov/wgacat/wgacat.html RASS-FSC home page www.xray.mpe.mpg.de/rosat/survey/rass-fsc RASS-BSC home page www.xray.mpe.mpg.de/rosat/survey/rass-bsc Chandra home page chandra.harvard.edu XAssist home page xassist.pha.jhu.edu/zope/xassist (XMMX & CXOX sources are from XAssist) If using this catalogue in published research, please add a small mention. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory,California Institute of Technology, under contract with the National Aeronautics and Space Administration.