J/ApJS/115/185 3C 390.3 BVRI and H photometry (Dietrich+, 1998)
Steps toward determination of the size and structure of the broad-line region
in active galactic nuclei. XII. Ground-based monitoring of 3C 390.3.
Dietrich M., Peterson B.M., Albrecht P., Altmann M., Barth A.J.,
Bennie P.J., Bertram R., Bochkarev N.G., Bock H., Braun J.M.,
Burenkov A., Collier S., Fang L.-Z., Francis O.P., Filippenko A.V.,
Foltz C.B., Gaessler W., Gaskell C.M., Geffert M., Ghosh K.K.,
Hilditch R.W., Honeycutt R.K., Horne K., Huchra J.P., Kaspi S.,
Kuemmel M., Leighly K.M., Leonard D.C., Malkov Y.F., Mikhailov V.,
Miller H.R., Morrill A.C., Noble J., O'Brien P.T., Oswalt T.D.,
Pebley S.P., Pfeiffer M., Pronik V.I., Qian B.-C., Robertson J.W.,
Robinson A., Rumstay K.S., Schmoll J., Sergeev S.G., Sergeeva E.A.,
Shapovalova A.I., Skillman D.R., Snedden S.A., Soundararajaperumal S.,
Stirpe G.M., Tao J., Turner G.W., Wagner R.M., Wagner S.J., Wei J.Y.,
Wu H., Zheng W., Zou Z.L.
<Astrophys. J. Suppl. Ser. 115, 185 (1998)>
=1998ApJS..115..185D 1998ApJS..115..185D (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Photometry, UBVRI ; Photometry, H-alpha ;
Photometry, H-beta ; Photometry, H-gamma
Keywords: galaxies: active - galaxies: individual (3C 390.3) - galaxies: Seyfert
Abstract:
Results of a ground-based optical monitoring campaign on 3C 390.3 in
1994-1995 are presented. The broadband fluxes (B, V, R, and I), the
spectrophotometric optical continuum flux Fλ(5177Å), and
the integrated emission-line fluxes of Hα, Hβ, Hγ, He
I 5876, and He II λ4686 all show a nearly monotonic increase
with episodes of milder short-term variations superposed. The
amplitude of the continuum variations increases with decreasing
wavelength (4400-9000Å). The optical continuum variations follow
the variations in the ultraviolet and X-ray with time delays, measured
from the centroids of the cross-correlation functions, typically
around 5 days, but with uncertainties also typically around 5 days;
zero time delay between the high-energy and low-energy continuum
variations cannot be ruled out. The strong optical emission lines
Hα, Hβ, Hγ, and He I λ5876 respond to the
high-energy continuum variations with time delays typically about 20
days, with uncertainties of about 8 days. There is some evidence that
He II λ4686 responds somewhat more rapidly, with a time delay
of around 10 days, but again, the uncertainties are quite large (∼8
days). The mean and rms spectra of the Hα and Hβ line
profiles provide indications for the existence of at least three
distinct components located at ±4000 and 0km/s relative to the line
peak. The emission-line profile variations are largest near line
center.
Objects:
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RA (2000) DE Designation(s)
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18 42 09.1 +79 46 17 3C 390.3 = QSO 1845+796
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hablue.dat 31 66 Hα blue light curve
hacent.dat 31 66 Hα center light curve
hared.dat 31 66 Hα red light curve
hatot.dat 31 67 Hα total light curve
hbblue.dat 31 72 Hβ blue light curve
hbcent.dat 31 72 Hβ center light curve
hbred.dat 31 72 Hβ red light curve
hbtot.dat 31 74 Hβ total light curve
he4686.dat 31 72 He II 4686 light curve
he5876.dat 31 50 He I 5876 light curve
hgamma.dat 31 50 Hγ light curve
c5177.dat 31 70 Continuum at 5177Å light curve
bflux.dat 31 17 B-band photometry light curve
vflux.dat 31 147 V-band photometry light curve
rflux.dat 31 129 R-band photometry light curve
iflux.dat 31 101 I-band photometry light curve
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Byte-by-byte Description of file: h*.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian date
14- 21 F8.3 10-15mW/m2 Flux Flux
26- 31 F6.3 10-15mW/m2 e_Flux rms uncertainty on Flux
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Byte-by-byte Description of file: c5177.dat [bvri]flux.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d HJD Heliocentric Julian date
14- 21 F8.3 10-14W/m2/nm Flux Flux
26- 31 F6.3 10-14W/m2/nm e_Flux rms uncertainty on Flux
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History: Copied at http://www.astronomy.ohio-state.edu/~agnwatch/3c390/
References:
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Peterson et al., Paper II. 1991ApJ...368..119P 1991ApJ...368..119P
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Dietrich et al., Paper IV. 1993ApJ...408..416D 1993ApJ...408..416D
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(End) James Marcout, Patricia Bauer [CDS] 09-Mar-1999