J/A+A/579/A19 K2 Variable Catalogue (Armstrong+, 2015)
K2 Variable Catalogue: Variable stars and eclipsing binaries in
K2 campaigns 1 and 0.
Armstrong D.J., Kirk J., Lam K.W.F., McCormac J., Walker S.R.,
Brown D.J.A., Osborn H.P., Pollacco D.L., Spake J.
<Astron. Astrophys. 579, A19 (2015)>
=2015A&A...579A..19A 2015A&A...579A..19A
ADC_Keywords: Stars, variable ; Binaries, eclipsing
Keywords: stars: variables: general - catalogues - stars: general -
binaries: eclipsing
Abstract:
We have created a catalogue of variable stars found from a search of
the publicly available K2 mission data from Campaigns 1 and 0. This
catalogue provides the identifiers of 8395 variable stars, including
199 candidate eclipsing binaries with periods up to 60d and 3871
periodic or quasi-periodic objects, with periods up to 20d for
Campaign 1 and 15d for Campaign 0.
Lightcurves are extracted and detrended from the available data. These
are searched using a combination of algorithmic and human
classification, leading to a classifier for each object as an
eclipsing binary, sinusoidal periodic, quasi periodic, or aperiodic
variable. The source of the variability is not identified, but could
arise in the non-eclipsing binary cases from pulsation or stellar
activity. Each object is cross-matched against variable star related
guest observer proposals to the K2 mission, which specifies the
variable type in some cases. The detrended lightcurves are also
compared to lightcurves currently publicly available.
The resulting catalogue is made available online at
http://deneb.astro.warwick.ac.uk/phrlbj/k2varcat/, and gives the ID,
type, period, semi-amplitude and range of the variation seen. We also
make available the detrended lightcurves for each object.
Description:
Table 3 is a catalogue of Variable Stars in K2 Campaigns 1 and 0,
classified into Periodic, Quasiperiodic, Aperiodic and Eclipsing
Binary types.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 107 8395 K2 Variable Catalogue, version 2015-02-12
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See also:
http://deneb.astro.warwick.ac.uk/phrlbj/k2varcat/ : K2VarCat home page
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- EPIC [201122454/210282474] EPIC Identifier
11- 12 A2 --- Type [AP QP P EB] Type (1)
14- 19 F6.2 % VRange [0.03/430] Range of variation (3)
21- 29 F9.6 d Per [0.02/60]?=0 Period (0 if none)
31- 35 F5.2 % Amp [0.01/97]?=0 Phased Amplitude (0 if none)
37-107 A71 --- Info Proposal Information (2)
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Note (1): Type as follows:
AP = APeriodic
QP = Quasi-Periodic
P = Sinusoidal Periodic
EB = Eclipsing Binary
Note (2): Guest Observer proposals relating to the object. Only variable star
related proposals are shown. If possible, the specific variable types which
each proposal is related to are given in brackets.
Note (3): percentage is relative to the median flux level.
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Acknowledgements:
David Armstrong, D.J.Armstrong(at)warwick.ac.uk
(End) Patricia Vannier [CDS] 13-May-2015