J/ApJ/622/129 Lag-luminosity relationship in AGN (Sergeev+, 2005)
Lag-luminosity relationship for interband lags between variations in B, V, R,
and I bands in active galactic nuclei.
Sergeev S.G., Doroshenko V.T., Golubinskiy Y.V., Merkulova N.I.,
Sergeeva E.A.
<Astrophys. J., 622, 129-135 (2005)>
=2005ApJ...622..129S 2005ApJ...622..129S
ADC_Keywords: Active gal. nuclei ; Photometry, UBVRI
Keywords: galaxies: active - galaxies: nuclei - galaxies: photometry -
galaxies: Seyfert
Abstract:
We determine interband lags between variations in the B band and
variations in the V, R, and I bands for 14 active galactic nuclei
observed at the Crimean Astrophysical Observatory. The computed lags
range from tenths of a day to several days, and it is positive (that
is, V, R, and I bands lag behind the B band) in most cases, except for
a few cases for the V filter.
Description:
At the end of 2001 we started an intensive monitoring of active
galaxies at the 70cm telescope of the Crimean Astrophysical
Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 59 14 Nuclei variability characteristics for the B filter
table1.dat 44 6913 Light curves
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See also:
IX/19 : X-ray lightcurves of bright AGNs from Ginga (Hayashida+ 1998)
J/PAZh/21/652 : Optical variability in NGC 7469 (Lyuty+, 1995)
J/A+A/314/43 : NGC 5548 Profile variability (Kollatschny+ 1996)
J/A+A/320/405 : NGC 5548 continuum light curve (Sergeev+ 1997)
J/PAZh/23/409 : Spectrophotometry of Mrk 509 (Chuvaev+, 1997)
J/ApJS/115/185 : 3C 390.3 BVRI and H photometry (Dietrich+, 1998)
J/PAZh/25/403 : Optical variability of NGC 4151 (Lyuty+, 1999)
J/A+A/376/775 : UBVRI and H-beta observations of 3C 390.3 (Shapovalova+ 2001)
J/A+A/371/79 : NGC 5548 UBVRI phot. and Halpha, Hbeta fluxes (Dietrich+,
2001)
J/A+A/422/925 : Profile variability in lines of NGC 5548 (Shapovalova+ 2004)
J/A+A/437/87 : Mrk 335 photometry in 1995-2004 (Doroshenko+, 2005)
J/A+A/486/99 : Long-term spectral variability of NGC 4151 (Shapovalova+,
2008)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object name
16- 22 F7.5 --- z Redshift
24- 32 A9 d ObsDate Period of observations (JD-2450000)
34- 36 I3 --- Nobs Number of nights of observations
38 I1 d dt Median time interval between successive
observations
40- 43 F4.1 % rms rms variability amplitude
45- 48 F4.2 --- Rmax Ratio of maximum to minimum fluxes
50- 52 I3 d ACF ? Width of the autocorrelation function
(ACF) at half-maximum (1)
54- 59 F6.2 --- BMAG Absolute B magnitude (2)
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Note (1): For two objects, the width of the ACF is undefined because of a
systematic increase (3C 390.3) or decrease (Mrk 335) in brightness
during the monitoring period.
Note (2): Absolute B magnitude computed by assuming a value of the Hubble
constant of 75km/s/Mpc.
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object name
16- 17 A2 --- Filter Filter that Flux was observed in (1)
19- 30 F12.4 d HJD Heliocentric Julian Date
32- 37 F6.4 --- Flux Relative flux (2)
39- 44 F6.4 --- e_Flux The 1σ uncertainty in Flux
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Note (1): R1 represents closely Cousins filter I, while filters designated
as B, V, R, and I represent closely the standard Johnson filters.
Note (2): Object brightness with respect to a comparison star (linear scale,
not magnitudes).
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 02-May-2006