J/ApJ/854/107 Light curves of 2 Seyfert 1 galaxies (Fausnaugh+, 2018)
Continuum reverberation mapping of the accretion disks in two Seyfert 1
galaxies.
Fausnaugh M.M., Starkey D.A., Horne K., Kochanek C.S., Peterson B.M.,
Bentz M.C., Denney K.D., Grier C.J., Grupe D., Pogge R.W., De Rosa G.,
Adams S.M., Barth A.J., Beatty T.G., Bhattacharjee A., Borman G.A.,
Boroson T.A., Bottorff M.C., Brown J.E., Brown J.S., Brotherton M.S.,
Coker C.T., Crawford S.M., Croxall K.V., Eftekharzadeh S., Eracleous M.,
Joner M.D., Henderson C.B., Holoien T.W.-S., Hutchison T., Kaspi S., Kim S.,
King A.L., Li M., Lochhaas C., Ma Z., MacInnis F., Manne-Nicholas E.R.,
Mason M., Montuori C., Mosquera A., Mudd D., Musso R., Nazarov S.V.,
Nguyen M.L., Okhmat D.N., Onken C.A., Ou-Yang B., Pancoast A., Pei L.,
Penny M.T., Poleski R., Rafter S., Romero-Colmenero E., Runnoe J.,
Sand D.J., Schimoia J.S., Sergeev S.G., Shappee B.J., Simonian G.V.,
Somers G., Spencer M., Stevens D.J., Tayar J., Treu T., Valenti S., Van
Saders J., Villanueva S., Villforth C., Weiss Y., Winkler H., Zhu W.
<Astrophys. J., 854, 107 (2018)>
=2018ApJ...854..107F 2018ApJ...854..107F
ADC_Keywords: Active gal. nuclei; Photometry, ugriz; Photometry, ultraviolet;
X-ray sources
Keywords: accretion, accretion disks ; galaxies: Seyfert ;
galaxies: individual (MCG+08-11-011, NGC 2617)
Abstract:
We present optical continuum lags for two Seyfert 1 galaxies,
MCG+08-11-011 and NGC 2617, using monitoring data from a reverberation
mapping campaign carried out in 2014. Our light curves span the ugriz
filters over four months, with median cadences of 1.0 and 0.6 days for
MCG+08-11-011 and NGC 2617, respectively, combined with roughly daily
X-ray and near-UV data from Swift for NGC 2617. We find lags
consistent with geometrically thin accretion-disk models that predict
a lag-wavelength relation of τ∝λ4/3. However, the
observed lags are larger than predictions based on standard thin-disk
theory by factors of 3.3 for MCG+08-11-011 and 2.3 for NGC 2617. These
differences can be explained if the mass accretion rates are larger
than inferred from the optical luminosity by a factor of 4.3 in
MCG+08-11-011 and a factor of 1.3 in NGC 2617, although uncertainty in
the SMBH masses determines the significance of this result. While the
X-ray variability in NGC 2617 precedes the UV/optical variability, the
long (2.6 day) lag is problematic for coronal reprocessing models.
Description:
The reverberation mapping (RM) campaign extended between 2014 January
and July, targeting 11 AGN, and was primarily based on observations at
the MDM observatory (see Fausnaugh+ 2017, J/ApJ/840/97 for details).
Supplemental data were contributed by telescopes from around the globe.
NGC 2617 was observed with Swift during this time as part of a
continuing target-of-opportunity program (Shappee+ 2014, J/ApJ/788/48).
Our ground-based imaging is mostly from the Las Cumbres Observatory
(LCO) 1m global telescope network, acquired as part of the AGN Key
project (Valenti+ 2015ApJ...813L..36V 2015ApJ...813L..36V). The network consist of nine
identical one-meter telescopes distributed at four sites around the
world. Data were obtained between 2014 January and May for
MCG+08-11-011 and NGC 2617 in the ugriz bands on an approximately
daily cadence.
Both objects were also observed with the 0.7m telescope at the Crimean
Astrophysical Observatory (CrAO). Images were taken in the Johnson
BVRI bands. Finally, V-band images were obtained with the 0.9m
telescope at West Mountain Observatory and the 0.5m telescope at Wise
Observatory.
The spectroscopic monitoring observations were obtained at the MDM
observatory using the Boller & Chivens CCD spectrograph on the 1.3m
McGraw-Hill telescope. We extracted light curves for the rest-frame
5100Å continuum. The 2.3m telescope at Wyoming Infrared Observatory
(WIRO) contributed four epochs of optical spectroscopy to help fill
anticipated gaps in the MDM observations.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
05 54 53.61 +46 26 21.6 MCG+08-11-011 = UGC 3374
08 35 38.80 -04 05 17.9 NGC 2617 = LEDA 24141
----------------------------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 70 2 Physical parameters of the 2 AGNs
table2.dat 32 250 MCG+08-11-011 light curves
table3.dat 32 713 NGC 2617 light curves
table4.dat 44 897 NGC 2617 Swift light curves
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
J/ApJS/95/1 : Atlas of Quasar Energy Distributions (Elvis+ 1994)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/ApJ/622/129 : Lag-luminosity relationship in AGN (Sergeev+, 2005)
J/ApJ/633/638 : Variable quasar sample from SDSS (Wilhite+, 2005)
J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014)
J/ApJ/788/159 : 17 Seyfert 1 galaxies light curves (Koshida+, 2014)
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/801/127 : 3.6um, 4.5um, B and V light curves of NGC 6418 (Vazquez+, 2015)
J/ApJ/821/56 : Space telescope RM project. III. NGC5548 LCs (Fausnaugh+, 2016)
J/ApJ/840/41 : X-ray/UV Swift monitoring of NGC 4151 (Edelson+, 2017)
J/ApJ/840/97 : Opt. reverberation mapping campaign of AGNs (Fausnaugh+, 2017)
J/ApJ/836/186 : Continuum-band lags in SDSS QSOs from PS1 obs. (Jiang+, 2017)
J/ApJ/837/131 : Space telescope RM project. V. NGC5548 sp. (Pei+, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Galaxy name
15- 20 F6.4 --- z [0.014/0.021] Redshift
22- 27 E6.3 Msun MBH [2.8e+07/3.3e+07] Mass MBH
29- 34 E6.3 Msun e_MBH Negative uncertainty in MBH
36- 41 E6.3 Msun E_MBH Positive uncertainty in MBH
43- 49 E7.3 10-7W Lum [1e+40/2e+44] Luminosity
51- 57 E7.3 10-7W e_Lum Luminosity uncertainty
59- 63 F5.3 --- REdd [0.01/0.06] Eddigton ratio
65- 70 E6.2 Msun/yr dM/dt [0.007/0.04] Accretion rate
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Byte-by-byte Description of file: table[23].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Filt Filter used (u, g, r, i ,z)
3- 12 F10.4 d HJD [56639.5/56797.3] Heliocentric Julian
Date; HJD-2400000
14- 20 F7.4 10-17W/m2/nm Flux [4.9/11.5] Flux in Filter;
in 1e-15erg/s/cm2/Å
22- 27 F6.4 10-17W/m2/nm e_Flux [0.01/0.4] Uncertainty in Flux
29- 32 A4 --- Tel Telescope identifier (1)
--------------------------------------------------------------------------------
Note (1): Telescope as follows:
LCO1 = Las Cumbres Observatory 1m telescope at McDonald Observatory.
LCO2 = Las Cumbres Observatory 1m telescope at Siding Spring (Dome B)
LCO3 = Las Cumbres Observatory 1m telescope at Siding Spring (Dome A)
LCO4 = Las Cumbres Observatory 1m telescope at Sutherland (Dome A)
LCO5 = Las Cumbres Observatory 1m telescope at Sutherland (Dome C)
LCO6 = Las Cumbres Observatory 1m telescope at Sutherland (Dome B)
CrAO = Crimean Astrophysical Observatory's 0.7m telescope.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Filt Filter used (UBV, UVM2, UVW1, UVW2, X)
6- 15 F10.4 d HJD [56413.9/56826.9] Heliocentric Julian
Date; JD-2400000
17- 23 F7.4 10-17W/m2/nm Flux [4.6/30.6]? Swift/UVOT flux in Filt;
in 1e-15erg/s/cm2/Å
25- 30 F6.4 10-17W/m2/nm e_Flux [0.1/2]? Uncertainty in Flux
34- 37 F4.2 10-14W/m2 FX [0.7/9.2]? Swift/XRT 0.3-10keV
absorption-corrected flux;
in 1e-11erg/s/cm2
41- 44 F4.2 10-14W/m2 e_FX [0.07/0.8]? Uncertainty in Flux
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 09-Nov-2018