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dc.contributor.author
Smith, Krista Lynne
dc.contributor.author
Sartori, Lia F.
dc.date.accessioned
2023-12-19T15:20:20Z
dc.date.available
2023-12-19T10:34:24Z
dc.date.available
2023-12-19T15:20:20Z
dc.date.issued
2023-12-01
dc.identifier.issn
0004-637X
dc.identifier.issn
2041-8213
dc.identifier.other
10.3847/1538-4357/acff5c
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/648548
dc.identifier.doi
10.3929/ethz-b-000648548
dc.description.abstract
The sampling strategy of the Transiting Exoplanet Survey Satellite (TESS) makes TESS light curves extremely valuable for investigating the high cadence optical variability of active galactic nuclei (AGN). However, because the TESS instrument was primarily designed for exoplanet science, the use of the satellite for other applications requires careful treatment of the data. In this paper, we introduce Quaver, a new software tool designed specifically to extract TESS light curves of extended and faint sources presenting stochastic variability. We then use this new tool to extract light curves of the nearby radio-loud AGN Pictor A, and perform a temporal and power spectral analysis of its high-cadence optical variability. The obtained light curves are well fit with a damped random walk (DRW) model, exhibiting both stochastic AGN variations and flaring behavior. The DRW characteristic timescales are tau DRW similar to 3-6 days during more quiet periods, and tau DRW similar to 0.8 day for periods with strong flares, even when the flares themselves are masked from the DRW fit. The observed timescales are consistent with the dynamical, orbital, and thermal timescales expected for the low black hole mass of Pictor A.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
IOP Publishing
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.title
The Rapid Optical Variability of the Nearby Radio-loud AGN Pictor A: Introducing the Quaver Pipeline for AGN Science with TESS
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2023-11-27
ethz.journal.title
The Astrophysical Journal
ethz.journal.volume
958
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Astrophys. J.
ethz.pages.start
188
en_US
ethz.size
23 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::09680 - Quanz, Sascha Patrick / Quanz, Sascha Patrick
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::02532 - Institut für Teilchen- und Astrophysik / Inst. Particle Physics and Astrophysics::09680 - Quanz, Sascha Patrick / Quanz, Sascha Patrick
ethz.date.deposited
2023-12-19T10:34:33Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2023-12-19T15:20:21Z
ethz.rosetta.lastUpdated
2024-02-03T08:08:01Z
ethz.rosetta.versionExported
true
ethz.COinS
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