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J/ApJ/757/51       FIRST-2MASS dust-reddened QSO spectra       (Glikman+, 2012)

FIRST-2MASS red quasars: transitional objects emerging from the dust. Glikman E., Urrutia T., Lacy M., Djorgovski S.G., Mahabal A., Myers A.D., Ross N.P., Petitjean P., Ge J., Schneider D.P., York D.G. <Astrophys. J., 757, 51 (2012)> =2012ApJ...757...51G
ADC_Keywords: QSOs ; Spectra, infrared ; Surveys ; Photometry, VRI ; Extinction ; Radio sources Keywords: dust, extinction; quasars: general; surveys Abstract: We present a sample of 120 dust-reddened quasars identified by matching radio sources detected at 1.4GHz in the Faint Images of the Radio Sky at Twenty Centimeters survey (FIRST) with the near-infrared Two Micron All Sky Survey catalog (2MASS) and color-selecting red sources. Optical and/or near-infrared spectroscopy provide broad wavelength sampling of their spectral energy distributions that we use to determine their reddening, characterized by E(B-V). We demonstrate that the reddening in these quasars is best described by Small-Magellanic-Cloud-like dust. This sample spans a wide range in redshift and reddening (0.1≲z≲3, 0.1≲E(B-V)≲1.5), which we use to investigate the possible correlation of luminosity with reddening. At every redshift, dust-reddened quasars are intrinsically the most luminous quasars. We interpret this result in the context of merger-driven quasar/galaxy co-evolution where these reddened quasars are revealing an emergent phase during which the heavily obscured quasar is shedding its cocoon of dust prior to becoming a "normal" blue quasar. When correcting for extinction, we find that, depending on how the parent population is defined, these red quasars make up ≲15%-20% of the luminous quasar population. We estimate, based on the fraction of objects in this phase, that its duration is 15%-20% as long as the unobscured, blue quasar phase. Description: Spectroscopic observations of our red quasar candidates were performed in the optical and/or near-infrared over the timespan of 10 years with additional spectra from archival and published sources in the literature. In total we obtained spectroscopy for 316 red quasar candidates. A total of 209 optical spectra were obtained at the W.M. Keck Observatory with the Echellette Spectrograph and Imager and the Low Resolution Imaging Spectrograph (LRIS), the Palomar observatory's 5m Hale telescope with the Double Spectrograph, and the Lick Observatory's 3m Shane telescope with the Kast spectrograph. Additional spectra were taken from the SDSS and SDSS-III archives, including the Baryon Oscillation Spectroscopic Survey quasar survey (Ross et al. 2012, Cat. J/ApJS/199/3). The 170 near-infrared spectra (covering the wavelength range ∼0.9-2.5um) were obtained at the NASA IRTF with SpeX, the Palomar 5m Hale with TripleSpec, or with TIFKAM on the 2.4m MDM telescope. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 141 395 F2M red quasar candidates table3.dat 57 132 Line diagnostics of narrow-line spectra spec/* 26 109 *Individual spectrum in ASCII format for 109 F2M red quasars (shown in Figure 6)
Note on spec/*: This includes all optical and near-infrared spectra obtained for this work that have been scaled and combined when possible. Excluding from this set are spectra from SDSS that do not have a near-infrared counterpart. These spectra are publicly available and can be obtained directly from SDSS.
See also: VII/270 : SDSS quasar catalog: tenth data release (Paris+, 2014) VIII/90 : The FIRST Survey Catalog, Version 12Feb16 (Becker+ 2012) V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012) I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006) II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/MNRAS/430/3445 : Covering factor of warm dust in quasars (Ma+, 2013) J/ApJ/753/125 : NIR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012) J/ApJ/698/1095 : The FIRST-2MASS red QSO survey. II. (Urrutia+, 2009) J/ApJ/697/182 : Dust emission from unobscured AGN (Thompson+, 2009) J/MNRAS/383/1513 : 2MASS, SDSS and FIRST fluxes of QSOs (Labita+, 2008) J/MNRAS/382/412 : Catalog of SDSS-DR5/2MASS spectroscopic quasars (Ofek, 2007) J/ApJ/667/673 : FIRST-2MASS red quasar survey (Glikman+, 2007) J/AJ/130/1345 : Optical-infrared colors of CORALS QSOs (Ellison+, 2005) J/MNRAS/354/L31 : SDSS DR2 QSO and DLA properties (Murphy+, 2004) J/ApJ/607/60 : FIRST-2MASS faint sources (Glikman+, 2004) J/ApJS/135/227 : The FIRST bright quasar survey. III. (Becker+, 2001) http://www.ast.cam.ac.uk/~mike/apmcat/ : Online APM catalog http://www.sdss.org/ : SDSS home page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Hour of Right Ascension (J2000) 4- 5 I2 min RAm Minute of Right Ascension (J2000) 7- 11 F5.2 s RAs Second of Right Ascension (J2000) 13 A1 --- DE- Sign of the Declination (J2000) 14- 15 I2 deg DEd Degree of Declination (J2000) 17- 18 I2 arcmin DEm Arcminute of Declination (J2000) 20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000) 25- 26 A2 --- Sp [Sp] Sp: Spectrum available in spec directory (column added by CDS) 28- 32 F5.2 mag Bmag [12/23] GSC II (Cat. I/305) blue magnitude 34- 38 F5.2 mag Rmag [16/21] GSC II (Cat. I/305) red magnitude 40- 44 F5.2 mag Jmag [13/19] 2MASS J band magnitude 46- 50 F5.2 mag Hmag [12/18] 2MASS H band magnitude 52- 56 F5.2 mag Ksmag [11/16] 2MASS Ks band magnitude 58- 64 F7.2 mJy Fpeak FIRST catalog 1.4GHz peak flux density 66- 72 F7.2 mJy Fint FIRST catalog 1.4GHz integrated flux density 74- 77 F4.2 mag J-Ks The (J-Ks) color index 79- 82 F4.2 mag R-Ks [4/7.3] The (R-Ks) color index 84- 89 F6.3 --- z [0/3.05]?=-9.99 Redshift 90 A1 --- u_z [?] Uncertainty flag on z 92-103 A12 --- Class Classification: BLLac, Galaxy, QSO, Sey=Seyfert, Starb=Starburst galaxy, ULIRG=Ultr-Luminous IR galaxy, NLAGN=Narrow-Line AGN, or star/combined 105-111 A7 --- Opt Optical observation run code (1) 113-121 A9 --- NIR Near-IR observation run code (2) 123-141 A19 --- BibCode Reference using the ADS/CDS/NED bibcode (3)
Note (1): Optical observation run code as follows: O1 = ESI 2000 July; O2 = ESI 2000 August; O3 = ESI 2001 March; O4 = ESI 2001 May; O5 = ESI 2001 June; O6 = ESI 2002 January; O7 = ESI 2002 February; O8 = ESI 2002 March; O9 = ESI 2002 April; O10 = ESI 2002 December; O11 = ESI 2003 February; O12 = ESI 2004 March; O13 = ESI 2005 January; O14 = LRIS 1999 August; O15 = LRIS 2000 February; O16 = LRIS 2003 June; O17 = Kast 1998 December; O18 = Kast 2000 September; O19 = Kast 2001 June; O20 = SDSS Spectrum; O21 = Double Spectrograph 2006 April. O22 = Double Spectrograph 2007 December. O23 = Double Spectrograph 2008 March. O24 = SDSS3 Spectrum; Note (2): Near-IR observation run code as follows: IR1 = SpeX 2002 May; IR2 = Spex 2002 October; IR3 = Spex 2003 April; IR4 = Spex 2003 September; IR5 = Spex 2004 May; IR6 = Spex 2004 June; IR7 = Spex 2004 September; IR8 = TIFKAM 2002 April; IR9 = SpeX 2007; IR10 = SpeX 2008 April; IR11 = TSpec 2008 April; IR12 = TSpec 2009 March. IR13 = TSpec 2011 September. Note (3): In the format YYYYJJJJJVVVVMPPPPA where YYYY is the publication year, JJJJJ is the journal abreviation, VVVV is the volume, M is the journal section, PPPP is the journal page, and A is the last name of the first author.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [F2M] 4- 21 A18 --- F2M F2M Quasar identifier (HHMMSS.ss+DDMMSS.s; J2000) 23- 27 F5.3 --- z [0.1/3.1] Redshift 29- 33 F5.2 mag Kmag [11.4/16] 2MASS Ks band magnitude 35- 39 F5.2 mag AK [-0.4/1.3] Extinction in the K band 41 A1 --- l_R-Ks Limit flag on R-Ks 42- 45 F4.2 mag R-Ks The (R-Ks) color index 47- 51 F5.2 mag E(B-V) Color excess 53- 57 A5 --- Spec Spectrum used: IR, Opt. or Comb.
Byte-by-byte Description of file: spec/*
Bytes Format Units Label Explanations
6- 13 F8.2 0.1nm lambda [4000/26000] Wavelength in Angstroms 15- 26 E12.7 cW/m2/nm Flux ? Flux in in erg/s/cm2
Nomemclature note: Quasars are <F2M JHHMMSS.ss+DDMMSS.s> in Simbad. History: From electronic version of the journal References: Glikman et al. Paper I. 2004ApJ...607...60G Cat. J/ApJ/607/60 Glikman et al. Paper II. 2007ApJ...667..673G Cat. J/ApJ/667/673
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 21-May-2014
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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