J/MNRAS/528/1930 Transit light curves of 4 hot Jupiters (Kang+, 2024)
Simultaneous multicolour transit photometry of hot Jupiters HAT-P-19b,
HAT-P-51b, HAT-P-55b, and HAT-P-65b.
Kang H., Chen G., Palle E., Murgas F., Abreu Garcia N., De Leon J.,
Enoc G., Esparza-Borges E., Fukuda I., Fukui A., Galan D., Hayashi Y.,
Isogai K., Kagetani T., Kawauchi K., Korth J., Livingston J.H., Luque R.,
Ma Y., Madrigal-Aguado A., Meni P., Montanes Rodriguez P., Mori M.,
Torres S.M., Narita N., Orell-Miquel J., Parviainen H., Pelaez-Torres A.,
Stangret M., Tamura M., Watanabe N.
<Mon. Not. R. Astron. Soc. 528, 1930 (2024)>
=2024MNRAS.528.1930K 2024MNRAS.528.1930K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry, SDSS
Keywords: techniques: photometric -
planets and satellites: fundamental parameters -
planets and satellites: individual:
(HAT-P-19b, HAT-P-51b, HAT-P-55b, HAT-P-65b) - planetary systems
Abstract:
Accurate physical parameters of exoplanet systems are essential for
further exploration of planetary internal structure, atmospheres, and
formation history. We aim to use simultaneous multicolour transit
photometry to improve the estimation of transit parameters, to search
for transit timing variations (TTVs), and to establish which of our
targets should be prioritized for follow- up transmission
spectroscopy. We performed time series photometric observations of 12
transits for the hot Jupiters HAT-P-19b, HAT-P-51b, HAT-P-55b, and
HAT-P-65b using the simultaneous four-colour camera MuSCAT2 on the
Telescopio Carlos Sanchez. We collected 56 additional transit light
curves from TESS photometry. To derive transit parameters, we modelled
the MuSCAT2 light curves with Gaussian processes to account for
correlated noise. To derive physical parameters, we performed
EXOFASTv2 global fits to the available transit and radial velocity
data sets, together with the Gaia DR3 parallax, isochrones, and
spectral energy distributions. To assess the potential for atmospheric
characterization, we compared the multicolour transit depths with a
flat line and a clear atmosphere model. We consistently refined the
transit and physical parameters. We improved the orbital period and
ephemeris estimates, and found no evidence for TTVs or orbital decay.
The MuSCAT2 broad-band transmission spectra of HAT-P-19b and HAT-P-65b
are consistent with previously published low- resolution transmission
spectra. We also found that, except for HAT-P-65b, the assumption of a
planetary atmosphere can improve the fit to the MuSCAT2 data. In
particular, we identified HAT-P-55b as a priority target among these
four planets for further atmospheric studies using transmission
spectroscopy.
Description:
We provide here the transit light curves of four hot Jupiter
HAT-P-19b, HAT-P-51b, HAT-P-55b, HAT-P-65b observed using the MuSCAT2
imager at the 1.52 m TCS telescope, where the g, r, i, z_s bands are
denoted as 1, 2, 3, 4 in the table. They include 12 transit light
curves of HAT-P-19b based on 3 transits, 10 transit light curves of
HAT-P-51b based on 3 transits, 14 transit light curves of HAT-P-55b
based on 4 transits, and 7 transit light curves of HAT-P-65b based on
2 transits. All the MuSCAT2 light curves contain time, flux, flux
uncertainty, and auxiliary information.
Objects:
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RA (2000) DE Designation(s)
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00 38 04.01 +34 42 41.5 HAT-P-19b = TOI-3597.01
01 24 15.64 +32 48 38.7 HAT-P-51b = TOI-3636.01
17 37 05.63 +25 43 52.2 HAT-P-55b = TOI-2122.01
21 03 37.31 +11 59 21.8 HAT-P-65b = HAT-P-65b
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 99 4 List of studied stars
lc_m2.dat 118 28507 HAT-P-19b, HAT-P-51b, HAT-P-55b, HAT-P-65b
MuSCAT2 transit light curves
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Target Target name
11- 12 I2 h RAh Simbad right ascension (J2000)
14- 15 I2 min RAm Simbad right ascension (J2000)
17- 21 F5.2 s RAs Simbad right ascension (J2000)
23 A1 --- DE- Simbad declination sign (J2000)
24- 25 I2 deg DEd Simbad declination (J2000)
27- 28 I2 arcmin DEm Simbad declination (J2000)
30- 33 F4.1 arcsec DEs Simbad declination (J2000)
35- 44 F10.8 d Per Orbial period (this paper)
46- 55 F10.8 d e_Per Orbial period error (this paper) (lower value)
57- 66 F10.8 d E_Per Orbial period error (this paper) (upper value)
68- 81 F14.6 d T0 Mid-transit times in BJD (UTC)
83- 90 F8.6 d e_T0 Mid-transit times error (lower value)
92- 99 F8.6 d E_T0 Mid-transit times error (upper value)
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Byte-by-byte Description of file: lc_m2.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian Date (TDB standard)
18- 27 F10.8 --- Flux Relative flux in Band
29- 38 F10.8 --- e_Flux Uncertainty of relative flux in Band
40- 51 F12.8 pix Xpos Drift of star on CCD in X direction
53- 64 F12.8 pix Ypos Drift of star on CCD in Y direction
66- 76 F11.8 pix FWHMX Full width at half maximum in X direction
78- 88 F11.8 pix FWHMY Full width at half maximum in Y direction
90- 99 F10.8 --- Airmass Airmass during observation
101-109 A9 --- Target Target name
(HAT-P-19b, HAT-P-51b, HAT-P-55b, HAT-P-65b)
111-116 I6 --- Night Starting night
118 I1 --- Band [1/4] Band name [g:1, r:2, i:3, z_s:4]
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Acknowledgements:
Guo Chen, guochen(at)pmo.ac.cn
(End) Guo Chen [PMO], Patricia Vannier [CDS] 11-Nov-2025