J/ApJ/909/18 Reverberation mapping monitoring of NGC3516 (Feng+, 2021)
Reverberation mapping of changing-look active galactic nucleus NGC 3516.
Feng H.-C., Hu C., Li S.-S., Liu H.T., Bai J.M., Xing L.-F., Wang W.-Y.,
Yang Z.-X., Xiao M., Lu K.-X.
<Astrophys. J., 909, 18 (2021)>
=2021ApJ...909...18F 2021ApJ...909...18F
ADC_Keywords: Active gal. nuclei; Photometry, UBV; Spectra, optical
Keywords: Active galaxies ; Photometry ; Reverberation mapping ; Seyfert
galaxies ; Spectroscopy ; Supermassive black holes
Abstract:
The changes of broad emission lines should be a crucial issue in
understanding the physical properties of changing-look active galactic
nuclei (CL-AGNs). Here we present the results of an intensive and
homogeneous 6 month long reverberation mapping (RM) monitoring
campaign during a low-activity state of the CL-AGN Seyfert galaxy
NGC3516. Photometric and spectroscopic monitoring was carried out
during 2018-2019 with the Lijiang 2.4m telescope. The sampling is 2d
in most nights, and the average sampling is ∼3d. The rest-frame time
lags of Hα and Hβ are τHα=7.56-2.10+4.42
and τHβ=7.50-0.77_+2.05days, respectively. From an rms
Hβ line dispersion of σline=1713.3±46.7km/s and a
virial factor of fσ=5.5, the central black hole mass of
NGC3516 is estimated to be MBH=2.4-0.3+0.7x107M☉, which
is in agreement with previous estimates. The velocity-resolved delays
show that the time lags increase toward negative velocity for both
Hα and Hβ. The velocity-resolved RM of Hα is done for
the first time. These RM results are consistent with other
observations before the spectral-type change, indicating a basically
constant broad-line region structure during the CL process. The CL
model of changes of accretion rate seems to be favored by long-term
Hβ variability and RM observations of NGC 3516.
Description:
From 2018 November to 2019 May, the observations of NGC 3516 were
carried out with the Yunnan Faint Object Spectrograph and Camera
mounted at the 2.4m optical telescope. The telescope is located at
Lijiang Observatory, Yunnan Observatories, Chinese Academy of Science.
Objects:
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RA (ICRS) DE Designation(s)
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11 06 47.46 +72 34 07.3 NGC 3516 = LEDA 33623
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 69 LCs of photometry and lines
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See also:
J/AJ/111/696 : Rotation curves of Seyfert galaxies with companions (Keel 1996)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/MNRAS/383/581 : Broad-line Balmer decrements in blue AGN (Dong+, 2008)
J/ApJ/716/993 : LAMP: reverberation mapping of H and He lines (Bentz+, 2010)
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/827/118 : A new reverberation mapping campaign on NGC 5548 (Lu+, 2016)
J/ApJ/828/78 : Optical monitoring of the Seyfert I NGC 3516 (Noda+, 2016)
J/ApJ/840/97 : Opt. reverberation mapping of 5 AGNs (Fausnaugh+, 2017)
J/ApJ/849/161 : BVRI light curves of the BL Lac object Mrk 501 (Feng+, 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/854/160 : SDSS & DES long-term extreme variability QSOs (Rumbaugh+, 2018)
J/ApJ/880/155 : RI photometry of blazars S5 0716+714 and 3C 273 (Liu+, 2019)
J/ApJ/874/8 : Follow-up sp. of SDSS changing-look QSOs (Macleod+, 2019)
J/ApJ/883/94 : Optical and UV follow-up of 1ES 1927+654 (Trakhtenbrot+, 2019)
J/ApJ/888/30 : BVRI & spectroscopic light curves of S5 0716+714 (Feng+, 2020)
J/ApJ/890/71 : 5100Å cont. & emission lines LCs of PG2130+099 (Hu+, 2020)
J/A+A/638/A13 : NGC 3516 optical flare (Ilic+, 2020)
J/A+A/642/A59 : PKS 1510-089 spectroscopic light curves (Rakshit, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 F10.6 d HJD-ph [431.42/633.18]? Heliocentric Julian
Date of photometry; JD-2458000
12- 16 F5.3 mag Bmag [2.15/2.3]? Apparent Johnson B band
magnitude
18- 22 F5.3 mag e_Bmag [0.004/0.008]? Uncertainty in Bmag
24- 33 F10.6 d HJD-sp [447.35/633.18] Heliocentric Julian Date
of spectroscopy; JD-2458000
35- 40 F6.2 10-14cW/m2/nm Ha [94.85/162.52] Hα flux
in units of 10-14erg/s/cm2
42- 45 F4.2 10-14cW/m2/nm e_Ha [6.16/6.17] Uncertainty in Ha
47- 51 F5.2 10-14cW/m2/nm Hb [9.27/23.61] Hβ flux
in units of 10-14erg/s/cm2
53- 56 F4.2 10-14cW/m2/nm e_Hb [0.83/0.92] Uncertainty in Hb
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 05-Aug-2022