J/ApJ/753/125 Near-IR spectroscopy follow-up of 60 SDSS-DR7 QSOs (Shen+, 2012)
Comparing single-epoch virial black hole mass estimators for luminous quasars.
Shen Y., Liu X.
<Astrophys. J., 753, 125 (2012)>
=2012ApJ...753..125S 2012ApJ...753..125S
ADC_Keywords: QSOs ; Spectra, infrared ; Photometry, SDSS ; Redshifts
Keywords: black hole physics; galaxies: active; quasars: general
Abstract:
Single-epoch virial black hole (BH) mass estimators utilizing broad
emission lines have been routinely applied to high-redshift quasars
to estimate their BH masses. Depending on the redshift, different line
estimators (Hα, Hβ, MgIIλ2798, CIVλ1549) are
often used with optical/near-infrared spectroscopy. Here, we use a
homogeneous sample of 60 intermediate-redshift (z∼1.5-2.2) Sloan
Digital Sky Survey quasars with optical and near-infrared spectra
covering CIV through Hα to investigate the consistency between
different single-epoch virial BH mass estimators.
Description:
We select our targets from the SDSS DR7 quasar catalog (e.g.,
Schneider et al. 2010, Cat. VII/260; Shen et al. 2011ApJS..194...45S 2011ApJS..194...45S)
for follow-up near-IR spectroscopy.
We observed our targets during 2009-2011 with TripleSpec on the ARC
3.5m telescope, and with the Folded-port InfraRed Echellette (FIRE) on
the 6.5m Magellan-Baade telescope. Table 1 summarizes our sample and
follow-up observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 60 Sample summary
table2.dat 269 60 Spectral measurements
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See also:
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
J/MNRAS/414/500 : Spitzer/IRS ATLAS project source (Hernan-Caballero+, 2011)
J/MNRAS/405/2302 : Improved redshifts for SDSS quasar spectra (Hewett+, 2010)
J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)
J/MNRAS/382/412 : Cat. of SDSS-DR5/2MASS spectroscopic quasars (Ofek, 2007)
J/ApJ/666/806 : SED of Spitzer quasars (QUEST) (Netzer+, 2007)
J/ApJ/640/579 : Near-infrared spectra of 27 SDSS quasars (Glikman+, 2006)
J/AJ/131/2766 : Quasar luminosity function from SDSS-DR3 (Richards+, 2006)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name QSO name (HHMM+DDMM; J2000)
11- 12 I2 h RAh Hour of right ascension (J2000)
14- 15 I2 min RAm Minute of right ascension (J2000)
17- 21 F5.2 s RAs Second of right ascension (J2000)
23 A1 --- DE- Sign of declination (J2000)
24- 25 I2 deg DEd Degree of declination (J2000)
27- 28 I2 arcmin DEm Arcminute of declination (J2000)
30- 33 F4.1 arcsec DEs Arcsecond of declination (J2000)
35- 38 I4 --- Plate SDSS plate
40- 42 I3 --- Fiber SDSS fiber
44- 48 I5 d MJD SDSS Modified Julian Date
50- 54 F5.3 --- z [1.4/2.2] Improved quasar redshift from Hewett
& Wild (2010, Cat. J/MNRAS/405/2302)
56- 61 F6.3 mag imag [15.3/19] SDSS i-band PSF magnitude
63- 68 F6.3 mag Jmag [14/17.6]?=0 2MASS J-band magnitude (1)
70- 75 F6.3 mag Hmag [13.2/16.6]?=0 2MASS H-band magnitude (1)
77- 82 F6.3 mag Ksmag [13/16.1]?=0 2MASS Ks-band magnitude (1)
84- 88 A5 --- Inst NIR spectroscopy instrument (TSPEC / FIRE) (2)
90- 95 I6 "YYMMDD" Date1 First UT date of NIR observation
97-102 I6 "YYMMDD" Date2 ? Second UT date of NIR observation if any
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Note (1): Note that here the 2MASS magnitudes were taken from Schneider et al.
(2010, Cat. VII/260), where aperture photometry was performed on 2MASS
images to detect faint objects, hence these near-infrared data go
beyond the 2MASS All-Sky and "6x" point source catalogs (see
Schneider et al. 2010, Cat. VII/260, for details).
Note (2): the isntruments are:
TSPEC = TripleSpec spectrograph on ARC (Astrophysical Research Consortium)
3.5m telescope at Apache Point Observatory
FIRE = Folded-port InfraRed Echellette on the 6.5m Magellan telescope
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Object Name (HHMM+DDMM; J2000)
12- 17 F6.3 [10-7W] logL135 [45.5/47.2] Log continuum restframe
135nm (1350Å) luminosity (erg/s)
19- 24 F6.3 [10-7W] e_logL135 Measurement uncertainty in logL135
26- 31 F6.3 [10-7W] logL300 Log continuum restframe 300nm luminosity
33- 38 F6.3 [10-7W] e_logL300 Measurement uncertainty in logL300
40- 45 F6.3 [10-7W] logL510 Log continuum restframe 510nm luminosity
47- 52 F6.3 [10-7W] e_logL510 Measurement uncertainty in logL510
54- 59 F6.3 [10-7W] logLC4 Log broad CIV(1549) line luminosity (erg/s)
61- 66 F6.3 [10-7W] e_logLC4 Measurement uncertainty in logLC4
68- 73 F6.3 [10-7W] logLC3 Log broad CIII](1908) line luminosity (erg/s)
75- 80 F6.3 [10-7W] e_logLC3 Measurement uncertainty in logLC3
82- 87 F6.3 [10-7W] logLMg2 Log broad MgII(2798) line luminosity (erg/s)
89- 94 F6.3 [10-7W] e_logLMg2 Measurement uncertainty in logLMg2
96-101 F6.3 [10-7W] logLHb Log broad Hβ line luminosity (erg/s)
103-108 F6.3 [10-7W] e_logLHb Measurement uncertainty in logLHb
110-115 F6.3 [10-7W] logLHa Log broad Hα line luminosity (erg/s)
117-122 F6.3 [10-7W] e_logLHa Measurement uncertainty in logLHa
124-128 I5 km/s W(C4) [2058/9075] FWHM of broad CIV line
130-134 I5 km/s e_W(C4) [58/1514] W(C4) uncertainty
136-140 I5 km/s W(C3) FWHM of broad CIII] line
142-146 I5 km/s e_W(C3) Measurement uncertainty in W(C3)
148-152 I5 km/s W(Mg2) FWHM of broad MgII line
154-158 I5 km/s e_W(Mg2) Measurement uncertainty in W(Mg2)
160-164 I5 km/s W(Hb) FWHM of broad Hβ line
166-170 I5 km/s e_W(Hb) Measurement uncertainty in W(Hb)
172-176 I5 km/s W(Ha) FWHM of broad Hα line
178-182 I5 km/s e_W(Ha) Measurement uncertainty in W(Ha)
184-188 I5 km/s VC4-Hb Blueshift of broad CIV - broad Hβ
190-194 I5 km/s e_VC4-Hb VC4-Hb uncertainty
196-200 I5 km/s VC4-Al3 Blueshift of broad CIV - AlIII
202-206 I5 km/s e_VC4-Al3 Measurement uncertainty in VC4-AlIII
208-212 I5 km/s VC3-Hb Blueshift of broad CIII] - broad Hβ
214-218 I5 km/s e_VC3-Hb Measurement uncertainty in VC3-Hb
220-224 I5 km/s VMg2-O3 Blueshift of broad MgII - [OIII]5008
226-230 I5 km/s e_VMg2-O3 Measurement uncertainty in VMg2-O3
232-236 I5 km/s VHb-O3 Blueshift of broad Hβ - [OIII]5008
238-242 I5 km/s e_VHb-O3 Measurement uncertainty in VHb-OIII
244-248 I5 km/s VHa-O3 Blueshift of broad Hα - [OIII]5008
250-254 I5 km/s e_VHa-O3 Measurement uncertainty in VHa-O3
256-259 F4.2 --- C4AS [0.5/1.7] Asymmetry parameter of
broad CIV line (symmetric=1) (3)
261-264 F4.1 pix-1 SNSDSS Median S/N per pixel for SDSS spectrum
266-269 F4.1 pix-1 SNNIR Median S/N per pixel for near-IR spectrum
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Note (3): the asymmetry parameter is defined as
AS = log(λred/λ0)/log(λ0/λblue)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Feb-2014