J/MNRAS/506/3810 7 transiting exoplanets CHEOPS light curves (Borsato+, 2021)
Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets.
Borsato L., Piotto G., Gandolfi D., Nascimbeni V., Lacedelli G., Marzari F.,
Billot N., Maxted P., Sousa S.G., Cameron A.C., Bonfanti A., Wilson T.,
Serrano L., Garai Z., Alibert Y., Alonso R., Asquier J., Barczy T.,
Bandy T., Barrado D, Barros S.C., Baumjohann W., Beck M., Beck T., Benz W.,
Bonfils X., Brandeker A., Broeg C., Cabrera J., Charnoz S., Csizmadia S.,
Davies M., Deleuil M., Delrez L., Demangeon O.D., Demory B.,
Lecavelier des Etangs A., Ehrenreich D., Erikson A., Escude G., Fortier A.,
Fossati L., Fridlund M., Gillon M., Guedel M., Hasiba J., Heng K., Hoyer S.,
Isaak K.G., Kiss L.L., Kopp E., Laskar J., Lendl M., Lovis C., Magrin D.,
Munari M., Ottensamer R., Peter G., Ragazzoni R., Rando N., Simon A.E.,
Steller M., Olofsson G., Pagano I., Palle E., Pollacco D., Queloz D.,
Rauer H., Ribas I., Segransan D., Santos N.M., Scandariato G., Smith A.,
Szabo G.M., Thomas N., Udry S., Van Grootel V., Walton N.A.
<Mon. Not. R. Astron. Soc. 506, 3810-3830 (2021)>
=2021MNRAS.506.3810B 2021MNRAS.506.3810B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry
Keywords: techniques: photometric - planets and satellites: individual:
(HAT-P-17 b, KELT-6 b, WASP-8 b, WASP-38 b, WASP-106 b, WASP-130 b,
K2-287 b)
Abstract:
We present 17 transit light curves of seven known warm-Jupiters
observed with the CHaracterising ExOPlanet Satellite (CHEOPS). The
light curves have been collected as part of the CHEOPS Guaranteed Time
Observation (GTO) program that searches for transit-timing variation
(TTV) of warm-Jupiters induced by a possible external perturber to
shed light on the evolution path of such planetary systems. We
describe the CHEOPS observation process, from the planning to the data
analysis. In this work we focused on the timing performance of CHEOPS,
the impact of the sampling of the transit phases, and the improvement
we can obtain combining multiple transits together. We reached the
highest precision on the transit time of about 13-16s for the
brightest target (WASP-38, G=9.2) in our sample. From the combined
analysis of multiple transits of fainter targets with G≥11 we
obtained a timing precision of ∼2min. Additional observations with
CHEOPS, covering a longer temporal baseline, will further improve the
precision on the transit times and will allow us to detect possible
TTV signals induced by an external perturber.
Description:
17 photometric light curves of CHEOPS observations (GTO Program
ID-015) of seven transiting exoplanets, with best-fit models and
diagnostic time series.
Targets: HAT-P-17 b, KELT-6 b, WASP-8 b, WASP-38 b, WASP-106 b,
WASP-130 b, K2-287 b.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 82 7 List of studied stars
tablea1.dat 332 466 HAT-P-17 V1 LC with models -
CHEOPS file_key: CHPR100015TG010801_V0100
tablea2.dat 332 402 HAT-P-17 V2 LC with models -
CHEOPS file_key: CHPR100015TG010901_V0100
tablea3.dat 332 344 HAT-P-17 V3 LC with models -
CHEOPS file_key: CHPR100015TG010902_V0100
tablea4.dat 332 381 KELT-6 V1 LC with models -
CHEOPS file_key: CHPR100015TG005201_V0102
tablea5.dat 332 366 WASP-8 V1 LC with models -
CHEOPS file_key: CHPR100015TG010401_V0100
tablea6.dat 330 422 WASP-8 V2 LC with models -
CHEOPS file_key: CHPR100015TG010701_V0100
tablea7.dat 332 831 WASP-38 V1 LC with models -
CHEOPS file_key: CHPR100015TG009101_V0102
tablea8.dat 332 817 WASP-38 V2 LC with models -
CHEOPS file_key: CHPR100015TG009102_V0102
tablea9.dat 332 815 WASP-38 V3 LC with models -
CHEOPS file_key: CHPR100015TG009103_V0102
tablea10.dat 332 543 WASP-38 V4 LC with models -
CHEOPS file_key: CHPR100015TG010001_V0100
tablea11.dat 332 416 WASP-106 V1 LC with models -
CHEOPS file_key: CHPR100015TG006701_V0102
tablea12.dat 330 254 WASP-130 V1 LC with models -
CHEOPS file_key: CHPR100015TG007001_V0102
tablea13.dat 330 348 WASP-130 V2 LC with models -
CHEOPS file_key: CHPR100015TG008801_V0102
tablea14.dat 330 341 WASP-130 V3 LC with models -
CHEOPS file_key: CHPR100015TG008802_V0102
tablea15.dat 331 305 K2-287 V1 LC with models -
CHEOPS file_key: CHPR100015TG007301_V0102
tablea16.dat 331 497 K2-287 V2 LC with models -
CHEOPS file_key: CHPR100015TG007901_V0102
tablea17.dat 330 397 K2-287 V3 LC with models -
CHEOPS file_key: CHPR100015TG007902_V0102
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 10 F4.1 s RAs Right ascension (J2000)
12 A1 --- DE- Declination sign (J2000)
13- 14 I2 deg DEd Declination (J2000)
16- 17 I2 arcmin DEm Declination (J2000)
19- 20 I2 arcsec DEs Declination (J2000)
22- 29 A8 --- Star Star name
32- 43 A12 --- FileName1 Name of the V1 light curve table
45- 56 A12 --- FileName2 Name of the V2 light curve table
58- 69 A12 --- FileName3 Name of the V3 light curve table
71- 82 A12 --- FileName4 Name of the V4 light curve table
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Byte-by-byte Description of file: tablea*?.dat
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Bytes Format Units Label Explanations
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1- 22 F22.17 d Time Time, TDB (BJD-2450000)
24- 41 F18.16 --- Flux Normalized flux
43- 64 F22.20 --- e_Flux Normalized error flux
66- 83 F18.16 --- FluxAll Full model (same unit of flux): flux_all =
(fluxTrans + fluxGlint + fluxGP)*fluxTrend
85-102 F18.16 --- FluxTrans Model of transit
104-121 F18.16 --- FluxTrend Model of the trend based on the detrending
parameters
123-125 F3.1 --- FluxGlint ?=0 Model of the glint. All zeros if not
used the glint parameter
127-150 E24.17 --- FluxGP ?=0 Model of the Gaussian Process.
All zeros if not used
151-175 E25.17 --- Res Difference between flux and flux_all
177-194 F18.16 --- FluxDetrend Detrended flux: fluxDetrend =
(Flux - FluxGlint - FluxGP)/fluxTrend
196-215 F20.11 ct Bg Background
217-238 E22.19 Hz Contam Contamination
239-256 F18.15 pix Xoff X-offset
258-274 F17.14 pix Yoff Y-offset
276-293 F18.14 pix CentX X centroid
295-311 F17.13 pix CentY Y centroid
313-332 F20.16 deg RollAngle Roll Angle
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Acknowledgements:
Luca Borsato, luca.borsato(at)inaf.it
(End) Luca Borsato [INAF-OAPD, Italy], Patricia Vannier [CDS] 28-Jun-2021