J/ApJ/865/56 Emission line & R-band continuum LCs of 17 QSOs (Lira+, 2018)
Reverberation mapping of luminous quasars at high z.
Lira P., Kaspi S., Netzer H., Botti I., Morrell N., Mejia-Restrepo J.,
Sanchez-Saez P., Martinez-Palomera J., Lopez P.
<Astrophys. J., 865, 56 (2018)>
=2018ApJ...865...56L 2018ApJ...865...56L
ADC_Keywords: QSOs; Spectra, optical; Redshifts; Photometry; Radio sources
Keywords: quasars: general ; quasars: supermassive black holes
Abstract:
We present reverberation mapping (RM) results for 17 high-redshift,
high-luminosity quasars with good-quality R-band and emission-line
light curves. We are able to measure statistically significant lags
for Lyα (11 objects), Si IV (5 objects), C IV (11 objects), and
C III] (2 objects). Using our results and previous lag determinations
taken from the literature, we present an updated C IV
radius-luminosity relation and provide for the first time
radius-luminosity relations for Lyα, Si IV, and C III]. While in
all cases the slopes of the correlations are statistically
significant, the zero points are poorly constrained because of the
lack of data at the low- luminosity end. We find that the
emissivity-weighted distances from the central source of the
Lyα, Si IV, and C III] line-emitting regions are all similar,
which corresponds to about half that of the Hβ region. We also
find that 3/17 of our sources show an unexpected behavior in some
emission lines, two in the Lyα light curve and one in the Si IV
light curve, in that they do not seem to follow the variability of the
UV continuum. Finally, we compute RM black hole (BH) masses for those
quasars with highly significant lag measurements and compare them with
C IV single-epoch (SE) mass determinations. We find that the RM-based
BH mass determinations seem smaller than those found using SE
calibrations.
Description:
A first spectroscopic run carried out in 2006 March with the du Pont
telescope at Las Campanas Observatory (LCO) allowed us to corroborate
the quasar nature of our sample and the presence of intense emission
lines suitable for reverberation mapping (RM).
Photometric monitoring of ∼50 high-z AGNs started in 2005 February.
After a few years, the less variable systems were dropped, and we
continue to monitor ∼60% of the original sample. The data were
obtained with the 1.3 and 0.9m SMARTS telescopes using broadband R
imaging. Several observations per year were acquired in queue mode.
The light curves reported in this work extend until 2017 January.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 17 Sample summary
table5.dat 115 1163 Emission line and R-band continuum light curves
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VII/241 : The 2dF QSO Redshift Survey (Croom+ 2004)
VIII/78 : Sydney University Molonglo Sky Survey (SUMSS) (Mauch+ 2006)
J/MNRAS/341/993 : ujbr photometry and redshifts of QSOs (Cirasuolo+, 2003)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/ApJ/632/799 : NGC4395 light curves (Peterson+, 2005)
J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)
J/MNRAS/434/956 : AT20G high-angular-resolution catalogue (Chhetri+, 2013)
J/ApJ/773/14 : BOSS: quasar luminosity function (Ross+, 2013)
J/ApJ/806/128 : Space telescope RM project. I. NGC5548 (De Rosa+, 2015)
J/ApJ/806/129 : Space telescope RM project. II. Swift data (Edelson+, 2015)
J/ApJ/821/56 : Space telescope RM project. III. NGC 5548LCs (Fausnaugh+, 2016)
J/ApJ/837/131 : Space telescope RM project. V. NGC5548 sp. (Pei+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Quasar name
14- 18 F5.3 --- z [1.8/3.4] Redshift (1)
20- 21 I2 h RAh Hour of right ascension (J2000)
23- 24 I2 min RAm Minute of right ascension (J2000)
26- 27 I2 s RAs Second of right ascension (J2000)
29 A1 --- DE- Sign of declination (J2000)
30- 31 I2 deg DEd Degree of declination (J2000)
33- 34 I2 arcmin DEm Arcminute of declination (J2000)
36- 37 I2 arcsec DEs Arcsecond of declination (J2000)
39- 43 F5.2 mag Rmag [16.2/18] R-band magnitude
45- 48 F4.2 mag e_Rmag [0.1/0.2] Rmag uncertainty
50- 54 F5.2 10+39W L1350 [0/34] 1350Å luminosity
in 1046erg/s (2)
56- 59 F4.2 10+39W e_L1350 [0/3.2] L1350 uncertainty (4)
61- 65 F5.2 10+39W L5100 [2.8/10.3] 5100Å luminosity
in 1046erg/s (3)
67- 70 F4.2 10+39W e_L5100 [0.04/0.2] L5100 uncertainty (4)
72 A1 --- l_P843MHz Limit flag on P843MHz
73- 76 F4.1 mJy P843MHz ? Radio flux at 843MHz from SUMSS
78- 80 F3.1 mJy e_P843MHz [1.3]? P843MHz uncertainty
82 A1 --- l_P1.4GHz Limit flag on P1.4GHz
83- 87 F5.1 mJy P1.4GHz ? Radio flux at 1.4GHz from NVSS
89- 92 F4.1 mJy e_P1.4GHz [0.5/14]? P1.4GHz uncertainty
94 A1 --- l_Rradio Limit flag on Rradio
95- 99 F5.1 --- Rradio Radio loudness (5)
101-105 F5.1 --- e_Rradio [2.8/100]? Rradio uncertainty
107-111 F5.2 10+9Msun MBH [1.2/15.6] Single-epoch (SE) BH mass (6)
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Note (1): The redshifts for the quasars were obtained from our own data from
the C III] line, except for CT320, where the line fit quality was
poor. For this object the C IV redshift is reported instead.
For CT252 the Mg II redshift is given.
Note (2): λLλ(1350Å) measurements were obtained from the
spectroscopic data.
Note (3): λLλ(5100Å) luminosities were obtained either from
2MASS photometry or by extrapolating our own R-band magnitudes
(see text).
Note (4): Uncertainties in λLλ(1350Å) and
λLλ(5100Å) were assumed to correspond to the
observed R-band variability.
Note (5): Rradio was obtained using the P1.4GHz measurements, except for
unavailable objects, where P843MHz was used instead.
Note (6): SE BH masses (MBHSE) have been obtained using the measured CIV
FWHM (Mejia-Restrepo+ 2016MNRAS.460..187M 2016MNRAS.460..187M).
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Quasar name
14- 19 F6.1 d JDLya [4202.9/7759]? Julian Date of Lya
observation, JD-2450000
21- 25 F5.2 10-17W/m2 Lya [2.9/64]? Lyα line flux
in units of 10-14erg/s/cm2
27- 30 F4.2 10-17W/m2 e_Lya [0.02/2.6]? Uncertainty in Lya
32- 37 F6.1 d JDSiIV [4202.9/7759]? Julian Date of SiIV
observation, JD-2450000
39- 42 F4.2 10-17W/m2 SiIV [0.04/3]? SiIV line flux
in units of 10-14erg/s/cm2
44- 47 F4.2 10-17W/m2 e_SiIV [0.01/0.4]? Uncertainty in SiIV
49- 54 F6.1 d JDCIV [4202.9/7759]? Julian Date of CIV
observation, JD-2450000
56- 59 F4.2 10-17W/m2 CIV [1.1/8.2]? CIV line flux
in units of 10-14erg/s/cm2
61- 64 F4.2 10-17W/m2 e_CIV [0.01/0.3]? Uncertainty in CIV
66- 71 F6.1 d JDCIII [4202.9/7759]? Julian Date of CIII
observation, JD-2450000
73- 76 F4.2 10-17W/m2 CIII [0.2/4.5]? CIII line flux
in units of 10-14erg/s/cm2
78- 81 F4.2 10-17W/m2 e_CIII [0.01/0.5]? Uncertainty in CIII
83- 88 F6.1 d JDMgII [5628.6/7758.8]? Julian Date of MgII
observation, JD-2450000
90- 93 F4.2 10-17W/m2 MgII [2.6/4]? MgII line flux
in units of 10-14erg/s/cm2
95- 98 F4.2 10-17W/m2 e_MgII [0.05/0.2]? Uncertainty in MgII
100-105 F6.1 d JDRband [3403.6/7759] Julian Date of R-band
observation, JD-2450000
107-110 F4.2 10-18W/m2/nm Rband [1/6.8] R-band continuum flux
in units of 10-16erg/s/cm2/Å
112-115 F4.2 10-18W/m2/nm e_Rband [0/0.3] Uncertainty in Rband
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 21-Aug-2019