J/A+A/594/A100 K2 new planetary and EB candidates (Barros+, 2016)
New planetary and eclipsing binary candidates from Campaigns 1-6 of the
K2 mission.
Barros S.C.C., Demangeon O., Deleuil M.
<Astron. Astrophys. 594, A100 (2016)>
=2016A&A...594A.100B 2016A&A...594A.100B (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, double and multiple ; Planets
Keywords: planetary systems detection - eclipsing binary stars - K2 mission -
photometric
Abstract:
With only two functional reaction wheels, Kepler cannot maintain
stable pointing at its original target field and has entered a new
mode of observation called K2. We describe a new pipeline to reduce K2
pixel files into light curves that are later searched for transit like
features. Our method is based on many years of experience in planet
hunting for the CoRoT mission. Owing to the unstable pointing, K2
light curves present systematics that are correlated with the target
position in the ccd. Therefore, our pipeline also includes a
decorrelation of this systematic noise. Our pipeline is optimised for
bright stars for which spectroscopic follow-up is possible. We
achieve a maximum precision on 6 hours of 6 ppm. The decorrelated
light curves are searched for transits with an adapted version of the
CoRoT alarm pipeline.
We present 172 planetary candidates and 327 eclipsing binary
candidates from campaigns 1, 2, 3, 4, 5, and 6 of K2. Both the
planetary candidates and eclipsing binary candidates lists are made
public to promote follow-up studies. The light curves will also be
available to the community.
Description:
The tables contain list of planetary candidates and eclipsing binary
candidates found in the campaigns 1-6 of the K2 data. In these tables,
we present the period, epoch, depth, full duration of the
transit/eclipse, and ingress/egress duration. We also give a few
indicators that the reader can use to choose their favourite targets
depending on their science objectives: existence of secondary and
V-shaped (grazing) at a 3*sigma detection threshold. We consider that
a transit is V-shaped if the time between the 2nd and 3rd contacts is
0±3*sigma. In some cases with low S/N, our automatic trapezoidal
fit gives excessively high error bars for some parameters, these were
substituted by '---'.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 119 177 Parameters for the planetary candidates
table5.dat 119 351 Parameters for the eclipsing binary candidates
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJ/728/117 : Kepler planetary candidates. I. (Borucki+, 2011)
J/A+A/579/A19 : K2 Variable Catalogue (Armstrong+, 2015)
J/MNRAS/452/3561 : Kepler eclipsing binaries. K2 Campaign 0 (LaCourse+, 2015)
J/ApJS/222/14 : 1st yr K2 mission planetary candidates (Vanderburg+, 2016
J/ApJS/224/2 : K2 EPIC stellar properties for 138600 targets (Huber+, 2016)
J/MNRAS/456/2260 : K2 Variability Catalogue II (Armstrong+, 2016)
Byte-by-byte Description of file: table3.dat table5.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- Epic Epic number of the target
11- 15 F5.2 mag mag Magnitude of the target
17- 18 I2 h RAh Right ascension (J2000.0) of the target
20- 21 I2 min RAm Right ascension (J2000.0) of the target
23- 29 F7.4 s RAs Right ascension (J2000.0) of the target
31 A1 --- DE- Declination sign (J2000.0) of the target
32- 33 I2 deg DEd Declination (J2000.0) of the target
35- 36 I2 arcmin DEm Declination (J2000.0) of the target
38- 44 F7.4 arcsec DEs Declination (J2000.0) of the target
46- 56 F11.8 d Per Orbital Period
58- 69 F12.7 d Epoch Mid time of the primary transit/eclipse
(JD-2450000.0)
71- 76 F6.3 % Depth Depth of the primary transit/eclipse
78- 85 F8.3 % e_Depth ?=- Error of the depth of the primary
transit/eclipse
87- 92 F6.3 h T1-4 Time of the total duration
94- 99 F6.3 h e_T1-4 Error of the time of the total duration
101-106 F6.3 h T1-2 Time of ingress/ egress
108-115 F8.3 h e_T1-2 ?=- Error of the time of Time of
ingress/ egress
117 A1 --- Sec [Y/-] Flagged Yes if the secondary is
significant at 3 sigma
119 A1 --- Gra [Y/-] Flagged Yes if time of ingress/egress is
equal to 2 times the full duration
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Acknowledgements:
Susana Barros, susana.barros(at)astro.up.pt
(End) Susana Barros [Porto Portugal], Patricia Vannier [CDS] 08-Aug-2016