J/A+A/619/A97 CoRoT transit catalogue (Deleuil+, 2018)
Planets, candidates, and binaries from the CoRoT/Exoplanet programme.
The CoRoT transit catalogue.
Deleuil M., Aigrain S., Moutou C., Cabrera J., Bouchy F., Deeg H.J.,
Almenara J.M., Hebrard G., Santerne A., Alonso R., Bonomo A.S., Borde P.,
Csizmadia Sz , Erikson A., Fridlund M., Gandolfi D., Guenther E.,
Guillot T., Guterman P., Grziwa S., Hatzes A., Leger T., Mazeh A., Ofir A.,
Ollivier M., Patzold H., Parviainen H., Rauer H., Rouan D., Schneider J.,
Titz-Weider R., Tingley B., Weingrill J.
<Astron. Astrophys. 619, A97 (2018)>
=2018A&A...619A..97D 2018A&A...619A..97D (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, double and multiple ; Exoplanets
Keywords: binaries: eclipsing - techniques: photometric -
space vehicles: instrument - methods: data analysis
Abstract:
The CoRoT space mission observed 163665 stars over 26 stellar fields
in the faint star channel. The exoplanet teams detected a total of
4123 transit-like features in the 177454 light curves. We present the
complete re-analysis of all these detections carried out with the same
softwares so that to ensure their homogeneous analysis. Although the
vetting process involves some human evaluation, it also involves a
simple binary flag system over basic tests: detection significance,
presence of a secondary, difference between odd and even depths,
colour dependence, V-shape transit, and duration of the transit. We
also gathered the information from the large accompanying ground-based
programme carried out on the planet candidates and checked how useful
the flag system could have been at the vetting stage of the
candidates. From the initial list of transit-like features, we
identified and separated 824 false alarms of various kind, 2269
eclipsing binaries among which 616 are contact binaries and 1653 are
detached ones, 37 planets and brown dwarfs, and 557 planet candidates.
We provide the catalogue of all these transit-like features, including
false alarms. For the planet candidates, the catalogue gives not only
their transit parameters but also the products of their light curve
modelling: reduced radius, reduced semi-major axis, and impact
parameter, together with a summary of the outcome of follow-up
observations when carried out and their current status. For the
detached eclipsing binaries, the catalogue provides, in addition to
their transit parameters, a simple visual classification. Among the
planet candidates whose nature remains unresolved, we estimate that
eight (within an error of three) planets are still to be identified.
After correcting for geometric and sensitivity biases, we derived
planet and brown dwarf occurrences and confirm disagreements with
Kepler estimates, as previously reported by other authors from the
analysis of the first runs: small-size planets with orbital period
less than ten days are underabundant by a factor of three in the CoRoT
fields whereas giant planets are overabundant by a factor of two.
These preliminary results would however deserve further investigations
using the recently released CoRoT light curves that are corrected of
the various instrumental effects and a homogeneous analysis of the
stellar populations observed by the two missions.
Description:
We provide the full catalogue of all the transit-like events
identified in the CoRoT light curves during the mission lifetime by
the CoRoT collaboration. It includes planet candidates that were
identified after the release of each run, their status once follow-up
observations were completed, and also binaries. The later were
separated in two groups: detached eclipsing binaries and contact
binaries. All these events, whose detection was performed by different
teams in a first stage, have been re-analysed with a unified procedure
and using the same softwares so that to derive, in a homogeneous and
consistent way, the complete set of transit parameters, using fixed
limb-darkening coefficients because of the uncertainties on the
spectral classification. In addition to this modelling, we also
carried out a vetting process of both candidates and binaries. It is
based on a simple binary flag system over basic tests: detection
significance, presence of a secondary, odd or even depth differences,
colour dependence, Vshape transit, and duration of the transit. Among
the 4123 transitlike signals that were analysed, it allowed us to
identify periodic signals that are instrumental false positives and
false detections. In total, the presented catalogue comes up with 594
events initially flagged as planet candidates which include published
planets and brown dwarfs, 1653 EBs, 616 contact binaries, and 824
false alarms.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 30 824 Discarded transit-like signals
tablea2.dat 176 570 Planetary candidates parameters and status after
follow-up observations or the second step of
the vetting process
tablea3.dat 101 24 Single transit events among the planet candidates
tablea4.dat 106 92 Likely detached eclipsing binaries of which only
a single eclipse was observed
tablea5.dat 120 1561 Detached eclipsing binaries parameters and
their categories
tablea6.dat 90 616 Contact binaries parameters
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See also:
B/corot : CoRoT observation log (N2-4.4) (CoRoT 2016)
J/A+A/479/865 : CoRoT exoplanet candidates (Loeillet+, 2008)
J/A+A/506/491 : Corot-IRa01 field eclipsing binary candidates (Carpano+, 2009)
J/A+A/506/501 : Eclipsing binaries in CoRoT-LRc01 field (Cabrera+, 2009)
J/A+A/506/519 : CoRoT variables supervised classification (Debosscher+, 2009)
J/A+A/523/A91 : CoRoT/Exoplanet fields with MATISSE (Gazzano+, 2010)
J/A+A/538/A112 : CoRoT LRa01 field planetary transit candidates (Carone+, 2012)
J/A+A/539/A14 : CoRoT SRc01 field planetary transit candidates (Erikson+ 2012)
J/A+A/541/A34 : Spectral types of stars in CoRoT fields (Sebastian+, 2012)
J/A+A/543/A125 : Spectral types of CoRoT stars (Guenther+, 2012)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- CoRoT CoRoT identification number
11- 27 A17 --- Run Run(s)
29- 30 A2 --- Type Type of detection (1)
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Note (1): Type of detection as follows:
FD = false detection
G = ghost signal
V = stellar variability
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 I9 --- CoRoT CoRoT identification number
11- 27 A17 --- Run Run(s)
29- 42 F14.6 d Epoch Epoch of observation (BJD)
44- 52 F9.6 d e_Epoch rms uncertainty on Epoch
54- 62 F9.6 d Per Period
64- 71 F8.6 d e_Per rms uncertainty on Period
72- 76 F5.3 % Depth Transit depth
78- 83 F6.3 % e_Depth rms uncertainty on Depth
85- 90 F6.3 h Dur Total transit duration
92- 97 F6.3 h e_Dur rms uncertainty on Duration
99-104 F6.4 --- Rp/R* Planet to star radii ratio
106-112 F7.3 --- e_Rp/R* rms uncertainty on Planet to star radii ratio
114-119 F6.2 --- a/R* Semi-major axis to star radius ratio
121-126 F6.2 --- e_a/R* rms uncertainty on Semi-major axis to
star radius ratio
128-131 F4.2 --- b Semi-minor axis
133-138 F6.2 --- e_b rms uncertainty on Semi-major axis
140-144 F5.2 [Sun] rho* Separation angle in rho☉ unit
146-151 F6.2 [Sun] e_rho* rms uncertainty on rho* in rho☉ unit
153-157 F5.2 mag rmag r magnitude
159-160 A2 --- SpType MK spectral type
162-167 I6 --- Flag Flag (G1)
169-172 A4 --- Nature Nature (2)
174-176 A3 --- FU [yes/no ] FU type star ?
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Note (2): Nature flag as follows:
P = planet
unr = unresolved
SB = spectroscopic binary
PEB = photometric eclipsing binary
CEB = contaminating eclipsing binary
WCCF = wide CCF that indicates the host star is hot and/or is a fast rotator
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- CoRoT CoRoT identification number
11- 21 A11 --- Run Run(s)
23- 36 F14.6 d Epoch Epoch of observation (BJD)
38- 45 F8.6 d e_Epoch rms uncertainty on Epoch
47- 48 A2 --- l_Per [≳ ] Limit flag on Per
49- 51 I3 d Per Period
53- 57 F5.3 % Depth Transit depth
59- 63 F5.3 % e_Depth rms uncertainty on Depth
65- 70 F6.3 h Dur Total transit duration
72- 76 F5.3 h e_Dur rms uncertainty on Duration
78- 82 F5.2 mag rmag r magnitude
84- 85 A2 --- SpType MK spectral type
87- 92 I6 --- Flag Flag (G1)
94- 97 A4 --- Nature Nature (2)
99-101 A3 --- FU [yes/no ] FU-type star ?
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Note (2): Nature flag as follows:
P = planet
unr = unresolved
SB = spectroscopic binary
PEB = photometric eclipsing binary
CEB = contaminating eclipsing binary
WCCF = wide CCF that indicates the host star is hot and/or is a fast rotator
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- CoRoT CoRoT identification number
11- 21 A11 --- Run Run(s)
23- 36 F14.6 d Epoch Epoch of observation (BJD)
38- 45 F8.6 d e_Epoch rms uncertainty on Epoch
47- 48 A2 --- l_Per [≳ ] Limit flag on Per
49- 51 I3 d Per Period
53- 58 F6.3 % Depth Transit depth
60- 65 F6.3 % e_Depth rms uncertainty on Depth
67- 72 F6.3 h Dur Total transit duration
74- 79 F6.3 h e_Dur rms uncertainty on Duration
81- 85 F5.2 mag rmag r magnitude
87- 92 A6 --- SpType MK spectral type
94- 99 I6 --- Flag Flag (G1)
101-106 A6 --- Nature Nature (2)
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Note (2): Nature flag as follows:
EB+sec = secondary observed
EB = secondary not observed
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Byte-by-byte Description of file: tablea5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- CoRoT CoRoT identification number
11- 27 A17 --- Run Run(s)
29- 42 F14.6 d Epoch Epoch of observation (BJD)
44- 51 F8.6 d e_Epoch rms uncertainty on Epoch
53- 61 F9.6 d Per Period
63- 70 F8.6 d e_Per ? rms uncertainty on Period
72- 77 F6.3 % Depth Transit depth
79- 84 F6.3 % e_Depth ? rms uncertainty on Depth
86- 91 F6.3 h Dur Total transit duration
93- 97 F5.3 h e_Dur rms uncertainty on Duration
99-103 F5.2 mag rmag r magnitude
105-109 A5 --- SpType MK spectral type
111-116 I6 --- Flag Flag (G1)
118-120 F3.1 --- Nature Nature (2)
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Note (2): Nature flag as follows:
0.0 = a secondary is detected at phase 0.5
0.1 = a secondary is seen but not at phase 0.5
0.2 = no secondary is detected or seen (see sect. 3.4)
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Byte-by-byte Description of file: tablea6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- CoRoT CoRoT identification number
11- 27 A17 --- Run Run(s)
29- 43 F15.7 d Epoch Epoch of observation (BJD)
45- 52 F8.6 d e_Epoch rms uncertainty on Epoch
54- 62 F9.6 d Per Period
64- 71 F8.6 d e_Per ? rms uncertainty on Period
73- 78 F6.3 % Depth Depth
80- 84 F5.2 mag rmag ?=- r magnitude
86- 90 A5 --- SpType MK spectral type
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Global notes:
Note (G1): Flag in the form of six binary flags:
1 = Fdet: low detection significance, set if the transit depth in the white
light curve is less than five times the corresponding uncertainty
2 = Fsec: secondary eclipse detected, set if the secondary eclipse depth
(at phase 0.5) is more than three times the corresponding uncertainty
3 = Fodd/even: odd/even depth differences, set if if the odd-to-even depth
ratio is more than 1.1 at 3σ confidence level
4 = Fcol: strong colour dependence, set if the ratio of the deepest to the
shallowest of the transits in the three colour channels is more than
1.5 at 3σ confidence level
5 = Flong: transit too long, set if the best fit stellar radius is >2R☉
at 3σ confidence level
6 = FV: V-shaped transit, set if the best-fit transit model is grazing that is
with a null inner duration estimate which means a bottom flat section
is lacking
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Acknowledgements:
Magali Deleuil, magali.deleuil(at)lam.fr
(End) Patricia Vannier [CDS] 04-Jun-2018