J/ApJ/822/86 False positive probabilities for Q1-Q17 DR24 KOIs (Morton+, 2016)
False positive probabilities for all Kepler Objects of Interest: 1284 newly
validated planets and 428 likely false positives.
Morton T.D., Bryson S.T., Coughlin J.L., Rowe J.F., Ravichandran G.,
Petigura E.A., Haas M.R., Batalha N.M.
<Astrophys. J., 822, 86-86 (2016)>
=2016ApJ...822...86M 2016ApJ...822...86M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Stars, diameters ;
Stars, masses ; Stars, ages ; Effective temperatures
Keywords: methods: statistical; planetary systems
Abstract:
We present astrophysical false positive probability calculations for
every Kepler Object of Interest (KOI) --the first large-scale
demonstration of a fully automated transiting planet validation
procedure. Out of 7056 KOIs, we determine that 1935 have probabilities
vespa (Morton T.D. 2015ascl.soft03011M), a publicly available Python
package that is able to be easily applied to any transiting exoplanet
candidate.
Description:
In this work, we apply the fully automated false positive probability
(FPP)-computing procedure described in Morton (2012ApJ...761....6M 2012ApJ...761....6M) to
7056 Kepler Objects of Interest (KOIs; see Section 3 for details) in
the Q1-Q17 (2009 May 13 to 2013 May 11) DR24 table.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 118 9 *Newly validated planets in the
optimistic habitable zone
table5.dat 166 6102 Stellar properties
table6.dat 157 7470 False positive probability results
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Note on table3.dat: This table lists CANDIDATE KOIs validated in this work that
may lie within the optimistic habitable zones of their host stars. The stellar
and planetary properties for this table are taken from the DR24 table at the
NExScI Exoplanet Archive (http://exoplanetarchive.ipac.caltech.edu/). Further
individual study of each of these systems using detailed follow-up observations
will either solidify or amend their potentially habitable nature.
In particular, we note that high-resolution imaging observations on the CFOP
archive (http://cfop.ipac.caltech.edu) reveal both KOI-2418 and KOI-3010 to
have close companions which may or may not affect their habitable nature.
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/224/12 : Kepler planetary candidates. VII. 48-month (Coughlin+, 2016)
J/A+A/587/A64 : Physical properties of giant exoplanets (Santerne+, 2016)
J/ApJ/809/8 : Terrestrial planet occurrence rates for KOIs (Burke+, 2015)
J/ApJS/217/16 : Kepler planetary candidates. V. 3yr Q1-Q12 (Rowe+, 2015)
J/A+A/571/A37 : KOI-1257 photometric and velocimetric data (Santerne+, 2014)
J/AJ/147/119 : Sources in the Kepler field of view (Coughlin+, 2014)
J/A+A/564/A125 : AGN Torus model comparison of AGN in the CDFS (Buchner+, 2014)
J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)
J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)
J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)
J/ApJ/770/90 : Candidate planets in the habitable zones (Gaidos, 2013)
J/ApJ/767/95 : Improved parameters of smallest KIC stars (Dressing+, 2013)
J/ApJ/750/114 : Kepler TTVs. IV. 4 multiple-planet systems (Fabrycky+, 2012)
J/ApJ/750/113 : Kepler TTVs. II. Confirmed multiplanet systems (Ford+, 2012)
J/ApJS/199/30 : KIC effective temperature scales (Pinsonneault+, 2012)
J/MNRAS/421/2342 : 4 Kepler systems transit timing obs. (Steffen+, 2012)
J/ApJ/738/170 : False positive Kepler planet candidates (Morton+, 2011)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/ApJ/736/L25 : Habitability of Kepler planetary cand. (Kaltenegger+, 2011)
http://www.kepler-fpp.space/koi-fpp : Kepler FP interactive plotting tool
http://exoplanetarchive.ipac.caltech.edu/ : NASA Exoplanet Archive homepage
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 --- KOI KOI number
9- 21 A13 --- Kepler Kepler name
23- 29 F7.3 d Per [18.4/259.4] Period
31- 34 F4.2 Rgeo Rp [1/2] Planetary radius
36- 39 F4.2 Rgeo e_Rp Negative uncertainty on Rp
41- 44 F4.2 Rgeo E_Rp [0.1/5] Positive uncertainty on Rp
46- 49 F4.2 Earth Fp [0.2/1.5] Insolation flux received
by planet (in Earth flux)
51- 54 F4.2 Earth e_Fp Negative uncertainty on Fp
56- 60 F5.2 Earth E_Fp [0.09/14] Positive uncertainty on Fp
62- 65 I4 K Teff [3387/5906] Stellar effective temperature
67- 69 I3 K e_Teff Negative uncertainty on Teff
71- 73 I3 K E_Teff Positive uncertainty on Teff
75- 78 F4.2 [cm/s2] logg [4.4/5] Log stellar surface gravity
80- 83 F4.2 [cm/s2] e_logg [0.05/1] Negative uncertainty on logg
85- 88 F4.2 [cm/s2] E_logg Positive uncertainty on logg
90- 93 F4.2 Rsun R* [0.3/0.9] Stellar radius
95- 98 F4.2 Rsun e_R* Negative uncertainty on R*
100-103 F4.2 Rsun E_R* [0.04/2] Positive uncertainty on R*
105-108 F4.2 Msun M* [0.3/0.9] Stellar mass
110-113 F4.2 Msun e_M* Negative uncertainty on M*
115-118 F4.2 Msun E_M* [0.03/0.3] Positive uncertainty on M*
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [K0]
3- 6 I04 --- KOI Kepler Object of Interest identifier
8- 11 F4.2 Msun M* [0.1/2.6] Stellar mass
13- 16 F4.2 Msun E_M* [0/1.3] Upper uncertainty in M*
18- 21 F4.2 Msun e_M* Lower uncertainty in M*
23- 28 F6.2 Rsun R* [0.1/204.2] Stellar radius
30- 35 F6.2 Rsun E_R* [0/140] Upper uncertainty in R*
37- 42 F6.2 Rsun e_R* Lower uncertainty in R*
44- 48 I5 K Teff [3050/12405] Stellar effective temperature
50- 53 I4 K E_Teff [1/3144] Upper uncertainty in Teff
55- 58 I4 K e_Teff Lower uncertainty in Teff
60- 63 F4.2 [cm/s2] logg [0.1/5.3] Log stellar surface gravity
65- 68 F4.2 [cm/s2] E_logg Upper uncertainty in logg
70- 73 F4.2 [cm/s2] e_logg [0/4.3] Lower uncertainty in logg
75- 79 F5.2 [Sun] [Fe/H] [-2.5/0.5] Stellar metallicity
81- 84 F4.2 [Sun] E_[Fe/H] [0/0.7] Upper uncertainty in [Fe/H]
86- 89 F4.2 [Sun] e_[Fe/H] Lower uncertainty in [Fe/H]
91- 95 F5.2 [Gyr] logAge [9/10.2] Log stellar age
97-100 F4.2 [Gyr] E_logAge [0/0.8] Upper uncertainty in logAge
102-105 F4.2 [Gyr] e_logAge Lower uncertainty in logAge
107-110 I4 pc Dist [17/2999] Stellar distance
112-115 I4 pc E_Dist [0/2782] Upper uncertainty in Dist
117-120 I4 pc e_Dist Lower uncertainty in Dist
122-125 F4.2 mag Av [0/2] Extinction in the V band
127-130 F4.2 mag E_Av [0/0.8] Upper uncertainty in Av
132-135 F4.2 mag e_Av Lower uncertainty in Av
137-140 I4 K piTeff [3068/7945]? Hypothesis prior Teff
142-145 I4 K e_piTeff [44/1067]? Uncertainty in piTeff
147-150 F4.2 [cm/s2] pilogg [0.3/5.1]? Hypothesis prior logg
152-155 F4.2 [cm/s2] e_pilogg [0.01/0.4]? Uncertainty in pilogg
157-161 F5.2 [Sun] pi[Fe/H] [-0.7/0.5]? Hypothesis prior [Fe/H]
163-166 F4.2 [Sun] e_pi[Fe/H] [0.04/0.3]? Uncertainty in pi[Fe/H]
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [K0]
3- 9 F7.2 --- KOI Kepler Object of Interest identifier
11- 17 F7.3 d Per [0.3/678] Period
19 A1 --- TTV? [NY] Transit timing variations? (1)
21- 27 F7.2 Rgeo Rp [0.1/8948]? Planetary radius
29- 36 F8.1 --- SNR [7/167992] Signal-to-Noise
38- 43 I6 ppm dsec [1/871169]? Maximum secondary eclipse
depth allowed
44 A1 --- f_dsec [i] i = Infinite
46- 50 F5.2 arcsec rexcl [0.5/16.5]? Exclusion radius (2)
52- 58 E7.1 --- PrEB ? EB false positive probability (3)
60- 66 E7.1 --- PrEB2 ? EB2 false positive probability (3)
68- 74 E7.1 --- PrHEB ? HEB false positive probability (3)
76- 82 E7.1 --- PrHEB2 ? HEB2 false positive probability (3)
84- 90 E7.1 --- PrBEB ? BEB false positive probability (3)
92- 98 E7.1 --- PrBEB2 ? BEB2 false positive probability (3)
100-106 E7.1 --- Prboxy ? Artificial boxy model probability (4)
108-114 A7 --- Prlong ? Artificial long model probability (4)
116-120 F5.3 --- fp [0.001/0.3]? Assumed specific planet
occurrence rate
122-125 F4.2 --- pos ? Probability of signal to be on target star (5)
127-130 F4.2 --- sos Positional probability score (6)
132-133 A2 --- Disp Exoplanet Archive disposition code (7)
135-141 E7.1 --- FPP ? False positive probability (8)
143-149 E7.1 --- e_FPP [0/0.5]? Uncertainty in FPP (9)
151-151 I1 --- Fail [1/7]? Reason for failure (10)
153-157 A5 --- Kepler Kepler number assigned, if validated (11)
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Note (1): Whether known transit timing variations were accounted for in
fitting a trapezoid to the folded transit signal.
Note (2): Inside of which false positive scenarios are allowed.
Note (3): Probabilities for different astrophysical false positive scenarios:
unblended eclipsing binary (EB), hierarchical eclipsing binary (HEB),
and background/foreground eclipsing binary (BEB). "2" indicates
double-period scenario.
Note (4): Artificial models to identify signals that are poorly described
by any of the astrophysical scenarios.
Note (5): According to Bryson et al. (2015, in prep).
Note (6): From Bryson et al. (2015, in prep).
Note (7): Exoplanet Archive disposition code as follows:
FP = false positive (3168 sources);
CA = candidate (3318 sources);
PL = confirmed (984 sources).
Note (8): Mean of 10 bootstrap recalculations.
Note (9): Standard deviation of 10 bootstrap recalculations.
Note (10): Reason for failure as follows:
1 = No Markov Chain Monte Carlo (MCMC) modeling available from
Rowe et al. (2015, J/ApJS/217/16);
2 = Unphysical MCMC fit from Rowe et al. (2015, J/ApJS/217/16);
3 = No stellar parameters available from Huber et al (2014, J/ApJS/211/2);
4 = No weak secondary data available;
5 = MCMC trapezoid fit did not converge;
6 = Period too short for implied star (orbit within star);
7 = Other unspecified vespa error.
Note (11): The column is truncated for number ≥1000 in the paper version;
corrected by CDS.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 05-Aug-2016