J/ApJ/920/9 YFOSC light curves of PG 0923+201 and PG 1001+291 (Li+, 2021)
Reverberation Mapping of Two Luminous Quasars; The Broad-line Region Structure
and Black Hole Mass.
Li S.-S., Yang S., Yang Z.-X., Chen Y.-J., Songsheng Y.-Y., Liu H.-Z.,
Du Pu, Luo B., Yu Z., Hu C., Jiang B.-W., Bao D.-W., Guo W.-J.,
Zhang Z.-X., Li Y.-R., Xiao M., Lu K.-X., Ho L.C., Bai J.-M., Bian W.-H.,
Aceituno J.,Minezaki T.,Horne K.,Kokubo M.,Wang J.-M.
<Astrophys. J., 920, 9 (2021)>
=2021ApJ...920....9L 2021ApJ...920....9L
ADC_Keywords: Black holes; QSOs; Photometry, VRI; Spectra, optical
Keywords: Supermassive black holes ; Reverberation mapping ; Quasars
Abstract:
We report the results of a multiyear spectroscopic and photometric
monitoring campaign of two luminous quasars, PG0923+201 and
PG1001+291, both located at the high-luminosity end of the broad-line
region (BLR) size-luminosity relation with optical luminosities above
1045erg/s. PG0923+201 is monitored for the first time, while
PG1001+291 was previously monitored but our campaign has a much longer
temporal baseline. We detect time lags of variations of the broad
Hβ, Hγ, and FeII lines with respect to those of the
5100Å continuum. The velocity-resolved delay map of Hβ in
PG0923+201 indicates a complicated structure with a mix of Keplerian
disk-like motion and outflow, and the map of Hβ in PG1001+291
shows a signature of Keplerian disk-like motion. Assuming a virial
factor of fBLR=1 and FWHM line widths, we measure the black hole mass
to be 118-16+11x107M☉ for PG0923+201 and
3.33-0.54+0.62x107M☉ for PG1001+291. Their respective
accretion rates are estimated to be 0.21-0.07+0.06xLEddc-2 and
679-227+259xLEddc-2, indicating that PG0923+201 is a
sub-Eddington accretor and PG1001+291 is a super-Eddington accretor.
While the Hβ time lag of PG0923+201 agrees with the
size-luminosity relation, the time lag of PG1001+291 shows a
significant deviation, confirming that in high-luminosity active
galactic nuclei (AGNs), the BLR size depends on both luminosity and
Eddington ratio. Black hole mass estimates from single-AGN spectra
will be overestimated at high luminosities and redshifts if this
effect is not taken into account.
Description:
Photometry was obtained directly through the image mode of unnan Faint
Object Spectrograph and Camera (YFOSC). We used the Johnson V filter
and the SDSS R' band filter for PG0923+201 and PG1001+291,
respectively. Typically we took three 50s exposures for each object on
each observing night.
In our observations, spectroscopy was mainly undertaken with the
Lijiang 2.4m telescope at the Yunnan Observatories of the Chinese
Academy of Sciences. It is equipped with YFOSC. For PG0923+201, the
spectra were obtained by Grism14 with a dispersion of 1.78Å/pixel
and a wavelength coverage of 3800-7400Å. We used a long slit with a
projected width of 2.5". For PG1001+291 we used Grism3. Ithas a
spectral coverage of 3800-9000Å and a dispersion of 2.9Å/pixel.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
09 25 54.71 +19 54 05.0 PG 0923+201 = 2E 2138
10 04 02.60 +28 55 35.3 PG 1001+291 = PG 1001+291
----------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 77 978 *Light curves of PG 0923+201
table3.dat 77 317 *Light curves of PG 1001+291
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Note on table2.dat and table3.dat: Photometric data are
intercalibrated with the 5100Å continuum. We used additive and
multiplicative factors to bring different light curves into a common
scale and we convert the calibrated flux to magnitude according to
STMAG system definition, that is, mag=-2.5log(Flambda)-21.10.
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See also:
J/MNRAS/268/305 : Variability of optically selected quasars (Hook+ 1994)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009)
J/ApJ/716/993 : LAMP; reverberation mapping of H and He lines (Bentz+, 2010)
J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011)
J/ApJ/755/60 : Reverberation mapping for 5 Seyfert 1 galaxies (Grier+, 2012)
J/ApJ/782/45 : SEAMBHs. I. Mrk 142, Mrk 335, and IRAS F12397+3333 (Du+, 2014)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/ApJS/217/26 : Lick AGN monitoring 2011; light curves (Barth+, 2015)
J/ApJ/806/22 : SEAMBHs IV. Hβ time lags (Du+, 2015)
J/ApJ/825/126 : SEAMBHs. V. The third year (Du+, 2016)
J/ApJ/818/30 : Lag measurements for 15 z<0.8 QSOs from SDSS-RM (Shen+, 2016)
J/ApJ/840/97 : Optical reverberation map campaign of 5 AGNs (Fausnaugh+, 2017)
J/ApJ/851/21 : SDSS RM project first year of observations (Grier+, 2017)
J/ApJ/837/131 : Space telescope RM project V NGC5548 sp monitoring (Pei+, 2017)
J/ApJ/866/133 : Continuum-Hβ light curves of 5 Seyfert 1 (De Rosa+, 2018)
J/ApJ/869/142 : Monitoring AGNs with Hβ Asymmetry (MAHA). I. (Du+, 2018)
J/ApJ/856/6 : SEAMBHs IX. 10 new Hβ light curves (Du+, 2018)
J/ApJ/886/42 : Reverberation mapping & opt. spectra data of AGNs (Du+, 2019)
J/ApJ/870/123 : Swift optical & UV flux of four AGNs (Edelson+, 2019)
J/ApJ/876/102 : Reverberation mapping of the Seyfert Zw I 1 (Huang+, 2019)
J/ApJ/887/135 : V-band, 5100Å and broad emission LCs of Mrk 79 (Lu+, 2019)
J/MNRAS/488/1519 : Calibration of the virial factor f in SMBHs (Yu+, 2019)
J/ApJ/876/49 : A 10yr reverberation mapping campaign for 3C273 (Zhang+, 2019)
J/ApJ/905/75 : 3yrs spectroscopic light curves of PG0026+129 (Hu+, 2020)
J/ApJ/890/71 : 5100A continuum & emission lines LCs of PG2130+099 (Hu+, 2020)
J/ApJ/909/18 : Reverberation mapping monitoring of NGC3516 (Feng+, 2021)
J/ApJS/253/20 : SEAMBHs XII. Reberberation mapping for 15 PG QSOs (Hu+, 2021)
Byte-by-byte Description of file: table[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 d JDS ? Julian Date of spectral observation;
JD-2450000
9- 13 F5.2 10-15mW/m2/nm F5100 ? Flux density at 5100A
(1e-16erg/s/cm2/Å)
15- 18 F4.2 10-15mW/m2/nm e_F5100 ? Uncertainty in F5100
20- 24 F5.2 10-14mW/m2 FHb ? Hβ flux (1e-14erg/s/cm2)
26- 29 F4.2 10-14mW/m2 e_FHb ? Uncertainty in FHb
31- 34 F4.2 10-14mW/m2 FHg ? Hγ flux (1e-14erg/s/cm2)
36- 39 F4.2 10-14mW/m2 e_FHg ? Uncertainty in FHg
41- 45 F5.2 10-14mW/m2 FFeII ? FeII flux (1e-14erg/s/cm2)
47- 50 F4.2 10-14mW/m2 e_FFeII ? Uncertainty in FFeII
52- 53 A2 --- SObs Spectroscopic observatory code (1)
55- 61 F7.2 d JDP Julian Date of photometric
observation; JD-2450000
63- 68 F6.3 mag mag Apparent magnitude
70- 74 F5.3 mag e_mag Uncertainty in mag
76- 77 A2 --- PObs Photometric observatory code (1)
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Note (1): Codes as follows:
LV = Lijiang Johnson V
Lr = Lijiang SDSS r
Zg = ZTF-g
Zr = ZTF-r
AV = ASAS-SN V
Ag = ASAS-SN g
CV = CAHA Johnson V
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 03-Feb-2023