J/A+A/667/A1 HD93963 CHEOPS light curves (Serrano+, 2022)
The HD 93963 A transiting system.
A 1.04 d super-Earth and a 3.65 d sub-Neptune discovered by TESS and CHEOPS.
Serrano L.M., Gandolfi D., Hoyer S., Brandeker A., Hooton M.J., Sousa S.,
Murgas F., Ciardi D.R., Howell S.B., Benz W., Billot N., Floren H.-G.,
Bekkelien A., Bonfanti A., Krenn A., Mustill A.J., Wilson T.G., Osborn H.,
Parviainen H., Heidari N., Palle E., Fridlund M., Adibekyan V., Fossati L.,
Deleuil M., Knudstrup E., Collins K.A., Lam K.W.F., Grziwa S., Salmon S.,
Albrecht S.H., Alibert Y., Alonso R., Anglada-Escude G., Barczy T.,
Barrado y Navascues D., Barros S.C.C., Baumjohann W., Beck M., Beck T.,
Bieryla A., Bonfils X., Boyd P.T., Broeg C., Cabrera J., Charnoz S.,
Chazelas B., Christiansen J.L., Collier Cameron A., Cortes-Zuleta P.,
Csizmadia Sz., Davies M.B., Deline A., Delrez L., Demangeon O.D.S.,
Demory B.-O., Dunlavey A., Ehrenreich D., Erikson A., Fortier A., Fukui A.,
Garai Z., Gillon M., Guedel M., Hebrard G., Heng K., Huang C.X., Isaak K.G.,
Jenkins J.M., Kiss L.L., Laskar J., Latham D.W., Lecavelier des Etangs A.,
Lendl M., Levine A.M., Lovis C., Lund M.B., Magrin D., Maxted P.F.L.,
Narita N., Nascimbeni V., Olofsson G., Ottensamer R., Pagano I.,
Pessanha A.C.S.V., Peter G., Piotto G., Pollacco D., Queloz D.,
Ragazzoni R., Rando N., Ratti F., Rauer H., Ribas I., Ricker G., Rowden P.,
Santos N.C., Scandariato G., Seager S., Segransan D., Simon A.E.,
Smith A.M.S., Steller M., Szabo Gy.M., Thomas N., Twicken J.D., Udry S.,
Ulmer B., Van Grootel V., Vanderspek R., Viotto V., Walton N.
<Astron. Astrophys. 667, A1 (2022)>
=2022A&A...667A...1S 2022A&A...667A...1S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry ; Optical
Keywords: detection - fundamental parameters - instrumentation: photometers -
spectrographs - methods: data analysis
Abstract:
We present the discovery of two small planets transiting HD 93963A
(TOI-1797), a GOV star (M*=1.109±0.043M☉, R* =
1.043±0.009R☉) in a visual binary system. We combined TESS and
CHEOPS space-borne photometry with MuSCAT 2 ground-based photometry,
'Alopeke and PHARO high-resolution imaging, TRES and FIES
reconnaissance spectroscopy, and SOPHIE radial velocity measurements.
We validated and spectroscopically confirmed the outer transiting
planet HD 93963 A c, a sub-Neptune with an orbital period of Pc~=3.65d
that was reported to be a TESS object of interest (TOI) shortly after
the release of Sector 22 data. HD 93963 A c has amass of
Mc=19.2±4.1MEarth and a radius of Rc=3.228±0.059REarth,
implying a mean density of ρc=3.1±0.7g/cm3. The inner
object, HD 93963 A b, is a validated 1.04 d ultra-short period (USP)
transiting super-Earth that we discovered in the TESS light curve and
that was not listed as a TOI, owing to the low significance of its
signal (TESS signal-to-noise ratio ∼6.7, TESS + CHEOPS combined
transit depth Db=141.5-8.3+8.5ppm). We intensively monitored the
star with CHEOPS by performing nine transit observations to confirm
the presence of the inner planet and validate the system. HD 93963 A b
is the first small (Rb=1.35±0.042REarth) USP planet discovered and
validated by TESS and CHEOPS. Unlike planet c, HD 93963 Ab is not
significantly detected in our radial velocities
(Mb=7.8±3.2MEarth). The two planets are on either side of the
radius valley, implying that they could have undergone completely
different evolution processes. We also discovered a linear trend in
our Doppler measurements, suggesting the possible presence of a
long-period outer planet. With a V-band magnitude of 9.2, HD 93963 A
is among the brightest stars known to host a USP planet, making it one
of the most favourable targets for precise mass measurement via
Doppler spectroscopy and an important laboratory to test formation,
evolution, and migration models of planetary systems hosting
ultra-short period planets.
Description:
CHEOPS PIPE raw and detrended light curves of 8 CHEOPS visits of
HD93963, targeting planets b (visits 1-8), and 1 visit targeting
planet c (visit 9)
Objects:
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RA (2000) DE Designation(s)
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10 51 06.51 +25 38 28.2 HD 93963 = TOI-1797 = TIC 368435330
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
drplc01.dat 106 1346 Data from archive file CHPR110045TG001301_V0200
drplc02.dat 106 457 Data from archive file CHPR110045TG001601_V0200
drplc03.dat 106 381 Data from archive file CHPR100031TG037201_V0200
drplc04.dat 106 641 Data from archive file CHPR110045TG001801_V0200
drplc05.dat 106 598 Data from archive file CHPR110045TG001901_V0200
drplc06.dat 106 596 Data from archive file CHPR110045TG002001_V0200
drplc07.dat 106 1219 Data from archive file CHPR110045TG002301_V0200
drplc08.dat 106 358 Data from archive file CHPR100031TG039701_V0200
drplc09.dat 106 618 Data from archive file CHPR100031TG039601_V0200
pipelc01.dat 93 1346 Data from archive file CHPR110045TG001301_V0200
pipelc02.dat 93 457 Data from archive file CHPR110045TG001601_V0200
pipelc03.dat 93 381 Data from archive file CHPR100031TG037201_V0200
pipelc04.dat 93 641 Data from archive file CHPR110045TG001801_V0200
pipelc05.dat 93 598 Data from archive file CHPR110045TG001901_V0200
pipelc06.dat 93 596 Data from archive file CHPR110045TG002001_V0200
pipelc07.dat 93 1219 Data from archive file CHPR110045TG002301_V0200
pipelc08.dat 93 358 Data from archive file CHPR100031TG039701_V0200
pipelc09.dat 93 618 Data from archive file CHPR100031TG039601_V0200
detlc01.dat 80 1303 Pipe detrended data from archive file
CHPR110045TG001301_V0200
detlc02.dat 87 439 Pipe detrended data from archive file
CHPR110045TG001601_V0200
detlc03.dat 87 370 Pipe detrended data from archive file
CHPR100031TG037201_V0200
detlc04.dat 87 620 Pipe detrended data from archive file
CHPR110045TG001801_V0200
detlc05.dat 87 576 Pipe detrended data from archive file
CHPR110045TG001901_V0200
detlc06.dat 87 583 Pipe detrended data from archive file
CHPR110045TG002001_V0200
detlc07.dat 87 1189 Pipe detrended data from archive file
CHPR110045TG002301_V0200
detlc08.dat 88 342 Pipe detrended data from archive file
CHPR100031TG039701_V0200
detlc09.dat 88 616 Pipe detrended data from archive file
CHPR100031TG039601_V0200
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Byte-by-byte Description of file: drplc0?.dat
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Bytes Format Units Label Explanations
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3- 16 F14.6 d Time Time of mid-exposure (JD)
18- 25 F8.6 --- Flux Normalized flux
27- 34 F8.6 --- e_Flux Normalized flux error
36- 43 F8.4 pix xoff Target position offset in x-direction
45- 52 F8.4 pix yoff Target position offset in y-direction
54- 61 F8.4 deg roll Spacecraft roll angle
63- 71 F9.7 --- contam Fraction of flux in aperture from nearby stars
73- 81 F9.7 --- smear Fraction of flux in aperture from readout trails
83- 98 F16.7 --- bg Fraction of flux in aperture from background
100-106 F7.3 --- Temp2 thermFront_2 temperature sensor reading
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Byte-by-byte Description of file: pipelc0?.dat
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Bytes Format Units Label Explanations
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3- 16 F14.6 d Time Time of mid-exposure (JD)
18- 25 F8.6 --- Flux Normalized flux
27- 34 F8.6 --- e_Flux Normalized flux error
36- 43 F8.4 pix xoff Target position offset in x-direction
45- 52 F8.4 pix yoff Target position offset in y-direction
54- 61 F8.4 deg roll Spacecraft roll angle
63- 71 F9.7 --- contam Fraction of flux in aperture from nearby stars
73- 85 F13.7 --- bg Fraction of flux in aperture from background
87- 93 F7.3 --- Temp2 thermFront_2 temperature sensor reading
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Byte-by-byte Description of file: detlc0?.dat
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Bytes Format Units Label Explanations
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3- 16 F14.6 d Time Time of mid-exposure (JD)
25- 48 E24.19 --- Flux Detrended flux
57- 80 E24.19 --- e_Flux Normalized flux error
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Acknowledgements:
Luisa Maria Serrano, luisamaria.serrano(at)unito.it
(End) Patricia Vannier [CDS] 18-Jul-2022