J/ApJ/748/49 Optical spectroscopy of 1LAC broad-line blazars (Shaw+, 2012)
Spectroscopy of broad-line blazars from 1LAC.
Shaw M.S., Romani R.W., Cotter G., Healey S.E., Michelson P.F.,
Readhead A.C.S., Richards J.L., Max-Moerbeck W., King O.G., Potter W.J.
<Astrophys. J., 748, 49 (2012)>
=2012ApJ...748...49S 2012ApJ...748...49S
ADC_Keywords: Active gal. nuclei ; Redshifts ; Spectroscopy ; QSOs ; Gamma rays
Keywords: galaxies: active - gamma rays: galaxies - quasars: general - surveys
Abstract:
We report on optical spectroscopy of 165 flat spectrum radio quasars
(FSRQs) in the Fermi 1LAC sample, which have helped allow a nearly
complete study of this population. Fermi FSRQs show significant
evidence for non-thermal emission even in the optical; the degree
depends on the γ-ray hardness. They also have smaller virial
estimates of hole mass than the optical quasar sample. This appears to
be largely due to a preferred (axial) view of the γ-ray FSRQ and
non-isotropic (H/R ∼ 0.4) distribution of broad-line velocities. Even
after correction for this bias, the Fermi FSRQs show higher mean
Eddington ratios than the optical population. A comparison of optical
spectral properties with Owens Valley Radio Observatory radio flare
activity shows no strong correlation.
Description:
The Fermi Gamma-Ray Space Telescope was launched on 2008 June 11. This
paper reports on a multi-year observing campaign to follow-up the
Fermi blazars from the 1LAC sample (Abdo et al., 2010, Cat. J/ApJ/715/429).
Observations were obtained from the Marcario Low Resolution
Spectrograph (LRS) on the Hobby-Eberley Telescope (HET), the Large
Cass Spectrometer (LCS) on the 2.7m at McDonald Observatory, on the
ESO Faint Object Spectrograph and Camera (EFOSC2) and ESO Multi-Mode
Instrument (EMMI) at the New Technology Telescope at La Silla
Observatory (NTT), on the Double Spectrograph (DBSP) on the 200" Hale
Telescope at Mt. Palomar, on the FOcal Reducer and low dispersion
Spectrograph (FORS2) on the Very Large Telescope (VLT) at Paranal
Observatory, and on the Low Resolution Imaging Spectrograph (LRIS) at
the W. M. Keck Observatory (WMKO). With the variety of telescope
configurations and varying observing conditions, the quality of the
spectra are not uniform: resolutions vary from 4 to 15Å, exposure
times from 360s to 2400s, and telescope diameters from 2.7m to 10m.
During this campaign, we generally used the minimum exposure required
for a reliable redshift, rather than exposure to a uniform S/N.
Velocities are not corrected to heliocentric or LSR frames.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 142 109 Line properties for z<1 broad-line 1LAC AGNs
table4.dat 144 119 Line properties for z>1 broad-line 1LAC AGNs
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See also:
VII/269 : SDSS Quasar Catalog, DR9Q (Paris+, 2012)
J/ApJS/206/13 : Blazars with γ-ray counterparts. II. (Massaro+, 2013)
J/ApJS/194/29 : Observations of blazars at 15GHz (Richards+, 2011)
J/ApJ/732/116 : IR spectra of γ-ray bright blazars (Malmrose+, 2011)
J/ApJ/726/16 : γ-ray loud blazars (Linford+, 2011)
J/ApJ/715/429 : First Fermi-LAT AGN catalog (1LAC) (Abdo+, 2010)
J/ApJS/188/405 : Fermi-LAT first source catalog (1FGL) (Abdo+, 2010)
J/ApJ/709/1407 : SED of the Fermi blazars (Li+, 2010)
J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009)
J/MNRAS/397/1713 : SDSS DR3 flat-spectrum radio quasars (Chen+, 2009)
J/ApJS/175/97 : CGRaBS: γ-ray blazar candidates survey (Healey+, 2008)
J/ApJS/171/61 : All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)
J/ApJS/166/470 : SDSS-Spitzer type I QSOs IR photometry (Richards+, 2006)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name AGN name (JHHMM+DDMM) (G1)
12- 16 F5.3 --- z [0.045/0.997] Spectroscopic redshift
18 A1 --- f_z [:] Indicates a z with systematic uncertainty
(discussed in section 2.4)
20- 24 F5.1 10uJy F5980 Flux at ∼598nm (in 10-28erg/s/cm2/Hz)
26- 28 F3.1 10uJy e_F5980 Uncertainty in F5980
30- 34 F5.2 --- alpha [-5/0.9] Spectral index α
36- 39 F4.2 --- e_alpha Uncertainty in alpha
41- 46 F6.3 [10-7W] L5100 [0/46.912]? Log luminosity at 510nm (erg/s)
48- 52 F5.3 [10-7W] e_L5100 ? Uncertainty in L5100
54- 59 F6.3 [10-7W] LHb [40.9/44.4]? Log luminosity of Hβ (erg/s)
61- 65 F5.3 [10-7W] e_LHb ? Uncertainty in LHb
67- 71 I5 km/s WHb [1600/12000]? FWHM of Hβ
73- 76 I4 km/s e_WHb [100/2600]? Uncertainty in WHb
78- 81 F4.2 [Msun] MHb [7.3/9.1]? Log of black hole mass from Hβ
83- 86 F4.2 [Msun] e_MHb [0.1/2.1]? Uncertainty in MHb
88- 93 F6.3 [10-7W] L3000 [43.7/46.9]? Log luminosity at 300nm (erg/s)
95- 99 F5.3 [10-7W] e_L3000 ? Uncertainty in L3000
101-106 F6.3 [10-7W] LMgII [41.5/44.5]? Log luminosity of Mg II (280nm);
in units of erg/s
108-113 F6.3 [10-7W] e_LMgII ? Uncertainty in LMgII
115-118 I4 km/s WMgII [1200/9700]? FWHM of MgII
120-125 I6 km/s e_WMgII [100/1400]? Uncertainty in WMgII
127-130 F4.2 [Msun] MMgII [6.5/9.6]? Log of black hole mass from Mg II
132-137 F6.2 [Msun] e_MMgII [0.13/1.84]? Uncertainty in MMgII
139-142 A4 --- Tel Telescope used in observation (G2)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name AGN name (JHHMM+DDMM) (G1)
12- 16 F5.3 --- z [1.006/3.037] Spectroscopic redshift
18 A1 --- f_z [:] Indicates a z with systematic uncertainty
(discussed in section 2.4)
20- 24 F5.1 10uJy F5980 [1/222] Flux at ∼598nm; 10-28erg/s/cm2/Hz
26- 28 F3.1 10uJy e_F5980 [0/0.7] Uncertainty in F5980
30- 34 F5.2 --- alpha [-3.9/1.1] Spectral index α
36- 39 F4.2 --- e_alpha Uncertainty in alpha
41- 46 F6.3 [10-7W] L3000 [44.6/47.4]? Log luminosity at 300nm; erg/s
48- 52 F5.3 [10-7W] e_L3000 ? Uncertainty in L3000
54- 59 F6.3 [10-7W] LMgII [42.5/45.1]? Log luminosity of Mg II (2800);
in units of erg/s
61- 65 F5.3 [10-7W] e_LMgII ? Uncertainty in LMgII
67- 71 I5 km/s WMgII [1000/10100]? FWHM of MgII
73- 76 I4 km/s e_WMgII [200/1900]? Uncertainty in WMgII
78- 81 F4.2 [Msun] MMgII [7.1/10.0]? Log of black hole mass from Mg II
83- 86 F4.2 [Msun] e_MMgII ? Uncertainty in MMgII
88- 93 F6.3 [10-7W] L1350 [45.1/47.5]? Log luminosity at 135nm; erg/s
95- 99 F5.3 [10-7W] e_L1350 ? Uncertainty in L1350
101-106 F6.3 [10-7W] LCIV [42.6/45.7]? Log luminosity of C IV (1550);
in units of erg/s
108-113 F6.3 [10-7W] e_LCIV ? Uncertainty in LCIV
115-118 I4 km/s WCIV [900/8500]? FWHM of C IV
120-125 I6 km/s e_WCIV [200/280700]? Uncertainty in WCIV
127-130 F4.2 [Msun] MCIV [7.1/9.8]? Log of black hole mass from C IV
132-137 F6.2 [Msun] e_MCIV [0.1/482]? Uncertainty in MCIV
139-144 A6 --- Tel Telescope used in observation (G2)
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Global notes:
Note (G1): The J4+4 names represent radio positions of the objects, as found
in Abdo et al. (2010, Cat. J/ApJ/715/429; <1FGL JHHMM.m+DDMM> in Simbad).
Note (G2): Observing configurations are indicated in table 1:
--------------------------------------------------------------------
Telescope Instrument Resolution Filter λmin λmax
Å Å Å
--------------------------------------------------------------------
HET LRS 15 GG385 4150 10500
HET LRS 8 GG385 4150 10500
McD 2.7m LCS 15 --- 4200 8200
NTT EFOSC2 16 --- 3400 7400
NTT EMMI 12 --- 4000 9300
Palomar 200" DBSP 5/15 --- 3100 8100
Palomar 200" DBSP 5/15 --- 3100 8100
Palomar 200" DBSP 5/9 --- 3100 8100
VLT FORS2 11 --- 3400 9600
VLT FORS2 17 --- 3400 9600
WMKO LRIS 4/7 --- 3100 10500
WMKO LRIS 4/9 --- 3100 10500
--------------------------------------------------------------------
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Oct-2013