Intensive disc-reverberation mapping of Fairall 9: first year of Swift and LCO monitoring
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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Intensive disc-reverberation mapping of Fairall 9 : first year of Swift and LCO monitoring. / Santisteban, J. V. Hernandez; 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.; Valenti, S.
I: Monthly Notices of the Royal Astronomical Society, Bind 498, Nr. 4, 21.09.2020, s. 5399-5416.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Intensive disc-reverberation mapping of Fairall 9
T2 - first year of Swift and LCO monitoring
AU - Santisteban, J. V. Hernandez
AU - Edelson, R.
AU - Horne, K.
AU - Gelbord, J. M.
AU - Barth, A. J.
AU - Cackett, E. M.
AU - Goad, M. R.
AU - Netzer, H.
AU - Starkey, D.
AU - Uttley, P.
AU - Brandt, W. N.
AU - Korista, K.
AU - Lohfink, A. M.
AU - Onken, C. A.
AU - Page, K. L.
AU - Siegel, M.
AU - Vestergaard, M.
AU - Bisogni, S.
AU - Breeveld, A. A.
AU - Cenko, S. B.
AU - Dalla Bonta, E.
AU - Evans, P. A.
AU - Ferland, G.
AU - Gonzalez-Buitrago, D. H.
AU - Grupe, D.
AU - Joner, M. D.
AU - Kriss, G.
AU - LaPorte, S. J.
AU - Mathur, S.
AU - Marshall, F.
AU - Mehdipour, M.
AU - Mudd, D.
AU - Peterson, B. M.
AU - Schmidt, T.
AU - Vaughan, S.
AU - Valenti, S.
PY - 2020/9/21
Y1 - 2020/9/21
N2 - 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 tau proportional to lambda(4/3) 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 (100 d) component with an opposite lag to the reverberation signal.
AB - 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 tau proportional to lambda(4/3) 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 (100 d) component with an opposite lag to the reverberation signal.
KW - accretion, accretion discs
KW - galaxies: active
KW - quasars: individual: Fairall 9
KW - ACTIVE GALACTIC NUCLEI
KW - BROAD-LINE REGION
KW - X-RAY
KW - CONTINUUM EMISSION
KW - ACCRETION DISC
KW - VARIABILITY
KW - DISTRIBUTIONS
KW - SOFTWARE
KW - VIEW
KW - LAGS
U2 - 10.1093/mnras/staa2365
DO - 10.1093/mnras/staa2365
M3 - Journal article
VL - 498
SP - 5399
EP - 5416
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 252293391