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J/ApJ/806/128      Space telescope RM project. I. NGC5548      (De Rosa+, 2015)

Space telescope and optical reverberation mapping project. I. Ultraviolet observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on Hubble Space Telescope. De Rosa G., Peterson B.M., Ely J., Kriss G.A., Crenshaw D.M., Horne K., Korista K.T., Netzer H., Pogge R.W., Arevalo P., Barth A.J., Bentz M.C., Brandt W.N., Breeveld A.A., Brewer B.J., Dalla Bonta E., De Lorenzo-Caceres A., Denney K.D., Dietrich M., Edelson R., Evans P.A., Fausnaugh M.M., Gehrels N., Gelbord J.M., Goad M.R., Grier C.J., Grupe D., Hall P.B., Kaastra J., Kelly B.C., Kennea J.A., Kochanek C.S., Lira P., Mathur S., Mchardy I.M., Nousek J.A., Pancoast A., Papadakis I., Pei L., Schimoia J.S., Siegel M., Starkey D., Treu T., Uttley P., Vaughan S., Vestergaard M., Villforth C., Yan H., Young S., Zu Y. <Astrophys. J., 806, 128 (2015)> =2015ApJ...806..128D (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Spectra, ultraviolet Keywords: galaxies: active; galaxies: individual: NGC 5548; galaxies: nuclei; galaxies: Seyfert Abstract: We describe the first results from a six-month long reverberation-mapping experiment in the ultraviolet based on 171 observations of the Seyfert 1 galaxy NGC 5548 with the Cosmic Origins Spectrograph on the Hubble Space Telescope. Significant correlated variability is found in the continuum and broad emission lines, with amplitudes ranging from ∼30% to a factor of two in the emission lines and a factor of three in the continuum. The variations of all the strong emission lines lag behind those of the continuum, with HeIIλ1640 lagging behind the continuum by ∼2.5 days and Lyαλ1215, CIVλ1550, and SiIVλ1400 lagging by ∼5-6 days. The relationship between the continuum and emission lines is complex. In particular, during the second half of the campaign, all emission-line lags increased by a factor of 1.3-2 and differences appear in the detailed structure of the continuum and emission-line light curves. Velocity-resolved cross-correlation analysis shows coherent structure in lag versus line of sight velocity for the emission lines; the high-velocity wings of CIV respond to continuum variations more rapidly than the line core, probably indicating higher velocity broad-line region clouds at smaller distances from the central engine. The velocity-dependent response of Lyα, however, is more complex and will require further analysis. Description: Observations were made in single-orbit HST COS visits approximately daily from 2014 February 1 through July 27. In each visit, we used the G130M and G160M gratings to observe the UV spectrum over the range 1153-1796Å in four separate exposures. Exposure times were selected to provide S/N≳100 when measured over velocity bins of ∼500km/s. 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 87 171 Continuum and emission-line light curves
See also: B/hst : HST Archived Exposures Catalog (STScI, 2007) J/ApJ/806/129 : Space telescope RM project. II. Swift data (Edelson+, 2015) J/ApJS/217/26 : Lick AGN monitoring 2011: light curves (Barth+, 2015) J/ApJS/216/4 : SDSS-RM project: technical overview (Shen+, 2015) J/ApJ/805/96 : SDSS-RM project: velocity dispersions of QSOs (Shen+, 2015) J/ApJ/779/109 : Long-term monitoring of NGC 5548 (Peterson+, 2013) J/ApJ/755/60 : Reverberation mapping for 5 Seyfert 1 galaxies (Grier+, 2012) J/ApJ/753/L2 : Reverberation mapping of AGNs (Assef+, 2012) J/ApJS/194/45 : QSO properties from SDSS-DR7 (Shen+, 2011) J/ApJ/716/993 : LAMP: reverberation mapping of H and He lines (Bentz+, 2010) J/ApJ/699/800 : Mass functions of active black holes (Vestergaard+, 2009) J/ApJ/698/895 : Variations in QSOs optical flux (Kelly+, 2009) J/ApJ/622/129 : Lag-luminosity relationship in AGN (Sergeev+, 2005) J/ApJ/613/682 : AGN central masses & broad-line region sizes (Peterson+, 2004) J/A+A/422/925 : Profile variability in lines of NGC 5548 (Shapovalova+ 2004) J/ApJ/599/886 : Emission lines of radio-loud AGN (Eracleous+, 2003) J/AJ/126/1720 : ugriz and Hα of double-peaked AGN (Strateva+, 2003) J/A+A/320/405 : NGC 5548 continuum light curve (Sergeev+ 1997) J/A+A/314/43 : NGC 5548 Profile variability (Kollatschny+ 1996) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 11 F11.6 d HJD130 Heliocentric Julian Date of the G130M observation (1) 13- 17 F5.2 10-15cW/m2/nm F1367 [21.8/64.8] G130M 1367 Angstrom flux (2) 19- 22 F4.2 10-15cW/m2/nm e_F1367 [0.5/1] Uncertainty in F1367 (3) 24- 28 F5.2 10-13mW/m2 FLya [34.3/46.9] G130M integrated Lyα line flux (4) 30- 33 F4.2 10-13mW/m2 e_FLya [0.4/0.6] Uncertainty in FLya (3) 35- 38 F4.2 10-13mW/m2 FNV [1.1/3.5] G130M integrated NV 1240Å line flux (4) 40- 43 F4.2 10-13mW/m2 e_FNV [0.05/0.08] Uncertainty in FNUV (3) 45- 48 F4.2 10-13mW/m2 FSiIV [3.2/6] G130M integrated SiIV 1400Å line flux (4) 50- 53 F4.2 10-13mW/m2 e_FSiIV [0.1/0.4] Uncertainty in FSiIV (3) 55- 65 F11.6 d HJD160 Heliocentric Julian Date of the G160M observation (1) 67- 71 F5.2 10-13mW/m2 FCIV [47.2/63] G160M integrated CIV 1549Å line flux (4) 73- 76 F4.2 10-13mW/m2 e_FCIV [0.7/1] Uncertainty in FCIV (3) 78- 82 F5.2 10-13mW/m2 FHeII [5.4/10.7] G160M integrated HeII 1640Å line flux (4) 84- 87 F4.2 10-13mW/m2 e_FHeII [0.2/0.5] Uncertainty in FHeII (3)
Note (1): Midpoint of the observation (HJD-2450000). Note (2): In units of 1e-15erg/s/cm2/Angstroms. Note (3): Flux uncertainties include both statistical and systematic errors. Note (4): In units of 1e-13erg/s/cm2.
History: From electronic version of the journal References: Edelson et al. Paper II. 2015ApJ...806..129E Cat. J/ApJ/806/129 Fausnaugh et al. Paper III. 2016ApJ...821...56F Cat. J/ApJ/821/56 Goad et al. Paper IV. 2016ApJ...824...11G
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 16-Oct-2015
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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