St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Intensive disc-reverberation mapping of Fairall 9 : 1st year of Swift & LCO monitoring

Thumbnail
View/Open
2008.02134v1.pdf (3.866Mb)
Date
11/2020
Author
Santisteban, J. V. Hernández
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.
Bontà, E. Dalla
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.
Funder
Science & Technology Facilities Council
Grant ID
ST/R00824/1
Keywords
Accretion discs
Galaxies: active
Quasars: individual: Fairall 9
QB Astronomy
QC Physics
DAS
Metadata
Show full item record
Altmetrics Handle Statistics
Altmetrics DOI Statistics
Abstract
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 sub-daily 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 days) component arising from X-ray reprocessing, and a more slowly varying (> 100 days) component with an opposite lag to the reverberation signal.
Citation
Santisteban , J V H , 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 , Bontà , E D , 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 2020 , ' Intensive disc-reverberation mapping of Fairall 9 : 1st year of Swift & LCO monitoring ' , Monthly Notices of the Royal Astronomical Society , vol. 498 , no. 4 , pp. 5399–5416 . https://doi.org/10.1093/mnras/staa2365
Publication
Monthly Notices of the Royal Astronomical Society
Status
Peer reviewed
DOI
https://doi.org/10.1093/mnras/staa2365
ISSN
0035-8711
Type
Journal article
Rights
Copyright © 2020 the Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1093/mnras/staa2222.
Description
Funding: UK STFC grant ST/R000824/1 (KH).
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/20440

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter