J/ApJ/837/131 Space telescope RM project. V. NGC5548 sp. monitoring (Pei+, 2017)
Space Telescope and optical reverberation mapping project.
V. Optical spectroscopic campaign and emission-line analysis for NGC 5548.
Pei L., Fausnaugh M.M., Barth A.J., Peterson B.M., Bentz M.C., De Rosa G.,
Denney K.D., Goad M.R., Kochanek C.S., Korista K.T., Kriss G.A.,
Pogge R.W., Bennert V.N., Brotherton M., Clubb K.I., Dalla Bonta E.,
Filippenko A.V., Greene J.E., Grier C.J., Vestergaard M., Zheng W.,
Adams S.M., Beatty T.G., Bigley A., Brown J.E., Brown J.S., Canalizo G.,
Comerford J.M., Coker C.T., Corsini E.M., Croft S., Croxall K.V.,
Deason A.J., Eracleous M., Fox O.D., Gates E.L., Henderson C.B.,
Holmbeck E., Holoien T.W.-S., Jensen J.J., Johnson C.A., Kelly P.L.,
Kim S., King A., Lau M.W., Li M., Lochhaas C., Ma Z., Manne-Nicholas E.R.,
Mauerhan J.C., Malkan M.A., McGurk R., Morelli L., Mosquera A., Mudd D.,
Sanchez F.M., Nguyen M.L., Ochner P., Ou-Yang B., Pancoast A., Penny M.T.,
Pizzella A., Poleski R., Runnoe J., Scott B., Schimoia J.S., Shappee B.J.,
Shivvers I., Simonian G.V., Siviero A., Somers G., Stevens D.J.,
Strauss M.A., Tayar J., Tejos N., Treu T., Van Saders J., Vican L.,
Villanueva S., Yuk H., Zakamska N.L., Zhu W., Anderson M.D., Arevalo P.,
Bazhaw C., Bisogni S., Borman G.A., Bottorff M.C., Brandt W.N.,
Breeveld A.A., Cackett E.M., Carini M.T., Crenshaw D.M.,
De Lorenzo-caceres A., Dietrich M., Edelson R., Efimova N.V., Ely J.,
Evans P.A., Ferland G.J., Flatland K., Gehrels N., Geier S., Gelbord J.M.,
Grupe D., Gupta A., Hall P.B., Hicks S., Horenstein D., Horne K.,
Hutchison T., Im M., Joner M.D., Jones J., Kaastra J., Kaspi S.,
Kelly B.C., Kennea J.A., Kim M., Kim S.C., Klimanov S.A., Lee J.C.,
Leonard D.C., Lira P., Macinnis F., Mathur S., Mchardy I.M., Montouri C.,
Musso R., Nazarov S.V., Netzer H., Norris R.P., Nousek J.A., Okhmat D.N.,
Papadakis I., Parks J.R., Pott J.-U., Rafter S.E., Rix H.-W., Saylor D.A.,
Schnulle K., Sergeev S.G., Siegel M., Skielboe A., Spencer M., Starkey D.,
Sung H.-I., Teems K.G., Turner C.S., Uttley P., Villforth C., Weiss Y.,
Woo J.-H., Yan H., Young S., Zu Y.
<Astrophys. J., 837, 131-131 (2017)>
=2017ApJ...837..131P 2017ApJ...837..131P (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Spectroscopy
Keywords: galaxies: active; galaxies: individual: NGC 5548;
galaxies: nuclei; galaxies: Seyfert
Abstract:
We present the results of an optical spectroscopic monitoring program
targeting NGC 5548 as part of a larger multiwavelength reverberation
mapping campaign. The campaign spanned 6 months and achieved an almost
daily cadence with observations from five ground-based telescopes. The
Hβ and HeIIλ4686 broad emission-line light curves lag that
of the 5100Å optical continuum by 4.17-0.36+0.36days and
0.79-0.34+0.35days, respectively. The Hβ lag relative to the
1158Å ultraviolet continuum light curve measured by the Hubble Space
Telescope is ∼50% longer than that measured against the optical
continuum, and the lag difference is consistent with the observed lag
between the optical and ultraviolet continua. This suggests that the
characteristic radius of the broad-line region is ∼50% larger than the
value inferred from optical data alone. We also measured
velocity-resolved emission-line lags for Hβ and found a complex
velocity-lag structure with shorter lags in the line wings, indicative
of a broad-line region dominated by Keplerian motion. The responses of
both the Hβ and He II emission lines to the driving continuum
changed significantly halfway through the campaign, a phenomenon also
observed for CIV, Lyα, HeII(+OIII]), and SiIV(+OIV]) during the
same monitoring period. Finally, given the optical luminosity of
NGC5548 during our campaign, the measured Hβ lag is a factor of
five shorter than the expected value implied by the RBLR-LAGN
relation based on the past behavior of NGC 5548.
Description:
Spectroscopic data were obtained from five telescopes: the McGraw-Hill
1.3m telescope at the MDM Observatory (4225-5775Å; median S/N=118),
the Shane 3m telescope at the Lick Observatory (Kast Double
Spectrograph: 3250-7920Å; median S/N=194), the 1.22m Galileo
telescope at the Asiago Astrophysical Observatory (3250-7920Å;
median S/N=160), the 3.5m telescope at Apache Point Observatory (APO;
Dual Imaging Spectrograph: 4180-5400Å, median S/N =160), and the
2.3m telescope at the Wyoming Infrared Observatory (WIRO;
5599-4399Å; median S/N=217). The optical spectroscopic monitoring
targeting NGC 5548 began on 2014 January 4 and continued through 2014
July 6 with approximately daily cadence. MDM contributed the largest
number of spectra with 143 epochs.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
14 17 59.51 +25 08 12.5 NGC 5548 = LEDA 51074
----------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 69 217 Flux measurements for continuum and emission lines
--------------------------------------------------------------------------------
See also:
J/ApJS/115/185 : 3C 390.3 BVRI and H photometry (Dietrich+, 1998)
J/ApJ/510/659 : Size and Structure of AGN in NGC 5548 (Peterson+, 1999)
J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004)
J/A+A/417/515 : I Zw 1 unusual emission line spectrum (Veron-Cetty+, 2004)
J/ApJ/622/129 : Lag-luminosity relationship in AGN (Sergeev+, 2005)
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/189/15 : FeII emission in a sample of AGN spectra (Kovacevic+, 2010)
J/ApJ/732/121 : V-band and Hβ monitoring of Z299-15 (Barth+, 2011)
J/ApJ/779/109 : Long-term monitoring of NGC 5548 (Peterson+, 2013)
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/806/128 : Space telescope RM project. I. NGC5548 (De Rosa+, 2015)
J/ApJ/806/22 : SEAMBHs IV. Hβ time lags (Du+, 2015)
J/ApJ/806/129 : Space telescope RM project. II. Swift data (Edelson+, 2015)
J/ApJ/821/56 : Space tel. RM project. III. NGC 5548 LCs (Fausnaugh+, 2016)
J/ApJ/827/118 : A new reverberation mapping campain on NGC 5548 (Lu+, 2016)
J/ApJ/818/30 : Lag measurements for z<0.8 QSOs from the SDSS-RM (Shen+, 2016)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 F7.2 d HJD Heliocentric Julian Date; JD-2450000
9- 14 A6 --- Tel Telescope code (1)
16- 21 F6.3 10-15cW/m2/nm F5100 [10/13.5] Flux density at 5100Å (2)
23- 27 F5.3 10-15cW/m2/nm e_F5100 [0.03/0.1] Uncertainty in F5100 (2)
29- 35 F7.3 10-15mW/m2 FHb [661/822] Linear continuum model Hβ
emission-line flux density (3)
37- 41 F5.3 10-15mW/m2 e_FHb [2/8] Uncertainty in FHb (3)
43- 49 F7.3 10-15mW/m2 FHbSD [656/803]? Spectral decomposition method
Hβ emission-line flux density (3)
51- 55 F5.3 10-15mW/m2 e_FHbSD [4/8]? Uncertainty in FHbSD (3)
57- 63 F7.3 10-15mW/m2 FHeIISD [21/163]? Spectral decomposition method
HeII emission-line flux density (3)
65- 69 F5.3 10-15mW/m2 e_FHeIISD [2/10]? Uncertainty in FHeIISD (3)
--------------------------------------------------------------------------------
Note (1): Telescope code as follows:
MDM = The McGraw-Hill 1.3-m telescope at the MDM Observatory.
Asiago = The 1.22-m Galileo telescope at the Asiago Astrophysical Observatory.
Lick = The Shane 3-m telescope at the Lick Observatory.
APO = The 3.5-m telescope at Apache Point Observatory.
WIRO = The 2.3-m telescope at the Wyoming Infrared Observatory.
Note (2): In units of 1e-15erg/s/cm2/Angstroms.
Note (3): In units of 1e-15erg/s/cm2. All emission-line fluxes include
contributions from both broad- and narrow-line components
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
De Rosa et al. Paper I. 2015ApJ...806..128D 2015ApJ...806..128D Cat. J/ApJ/806/128
Edelson et al. Paper II. 2015ApJ...806..129E 2015ApJ...806..129E Cat. J/ApJ/806/129
Fausnaugh et al. Paper III. 2016ApJ...821...56F 2016ApJ...821...56F Cat. J/ApJ/821/56
Goad et al. Paper IV. 2016ApJ...824...11G 2016ApJ...824...11G
Pei et al. Paper V. 2017ApJ...837..131P 2017ApJ...837..131P This catalog
Starkey et al. Paper VI. 2017ApJ...835...65S 2017ApJ...835...65S
Mathur et al. Paper VII. 2017ApJ...846...55M 2017ApJ...846...55M
Kriss et al. Paper VIII. 2019ApJ...881..153K 2019ApJ...881..153K Cat. J/ApJ/881/153
Dehghanian et al. Paper X. 2019ApJ...877..119D 2019ApJ...877..119D
Dehghanian et al. Paper XI. 2020ApJ...898..141D 2020ApJ...898..141D
Williams et al. Paper XII. 2020ApJ...902...74W 2020ApJ...902...74W
Dehghanian et al. Paper XIII. 2021ApJ...906...14D 2021ApJ...906...14D
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 24-Oct-2017