2020MNRAS.498.5399H

Query : 2020MNRAS.498.5399H

2020MNRAS.498.5399H - Mon. Not. R. Astron. Soc., 498, 5399-5416 (2020/November-2)

Intensive disc-reverberation mapping of Fairall 9: first year of Swift and LCO monitoring.

HERNANDEZ SANTISTEBAN J.V., EDELSON R., HORNE K., GELBORD J.M., BARTH A.J., CACKETT E.M., GOAD M.R., NETZER H., STARKEY D., UTTLEY P., BRANDT W.N., KORISTA K., LOHFINK A.M., ONKEN C.A., PAGE K.L., SIEGEL M., VESTERGAARD M., BISOGNI S., BREEVELD A.A., CENKO S.B., DALLA BONTA E., EVANS P.A., FERLAND G., GONZALEZ-BUITRAGO D.H., GRUPE D., JONER M.D., KRISS G., LAPORTE S.J., MATHUR S., MARSHALL F., MEHDIPOUR M., MUDD D., PETERSON B.M., SCHMIDT T., VAUGHAN S. and VALENTI S.

Abstract (from CDS):

We present results of time-series analysis of the first year of the Fairall 9 intensive disc-reverberation campaign. We used Swift and the Las Cumbres Observatory global telescope network to continuously monitor Fairall 9 from X-rays to near-infrared at a daily to subdaily cadence. The cross-correlation function between bands provides evidence for a lag spectrum consistent with the τ ∝ λ4/3 scaling expected for an optically thick, geometrically thin blackbody accretion disc. Decomposing the flux into constant and variable components, the variable component's spectral energy distribution is slightly steeper than the standard accretion disc prediction. We find evidence at the Balmer edge in both the lag and flux spectra for an additional bound-free continuum contribution that may arise from reprocessing in the broad-line region. The inferred driving light curve suggests two distinct components, a rapidly variable (<4 d) component arising from X-ray reprocessing, and a more slowly varying (>100 d) component with an opposite lag to the reverberation signal.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): accretion, accretion discs - galaxies: active - quasars: individual: Fairall 9

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
2 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
3 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1179 0
4 M 3 GlC 13 42 11.62 +28 22 38.2     6.39     ~ 2593 0
5 Z 336-28 Sy1 13 53 03.4348964112 +69 18 29.410910460   15.15 14.46     ~ 812 1
6 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2895 0
7 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
8 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3

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