J/AJ/166/223 SPEARNET normalized photometry of HAT-P-26 (A-thano+, 2023)
Revisiting the Transit Timing and Atmosphere Characterization of the Neptune-
mass Planet HAT-P-26 b.
A-thano N., Awiphan S., Jiang I.-G., Kerins E., Priyadarshi A.,
McDonald I., Joshi Y.C., Chulikorn T., Hayes J.J.C., Charles S.,
Huang C.-K., Rattanamala R., Yeh L.-C., Dhillon V.S.
<Astron. J., 166, 223 (2023)>
=2023AJ....166..223A 2023AJ....166..223A
ADC_Keywords: Exoplanets; Photometry; Optical
Keywords: Exoplanet astronomy ; Exoplanet atmospheres ; Timing variation
methods
Abstract:
We present a transit-timing variation (TTV) and planetary atmosphere
analysis of the Neptune-mass planet HAT-P-26 b. We present a new set
of 13 transit light curves from optical ground-based observations and
combine them with light curves from the Wide Field Camera 3 on the
Hubble Space Telescope, the Transiting Exoplanet Survey Satellite, and
previously published ground-based data. We refine the planetary
parameters of HAT-P-26 b and undertake a TTV analysis using 33
transits obtained over seven years. The TTV analysis shows an
amplitude signal of 1.98±0.05minutes, which could result from the
presence of an additional ∼0.02MJup planet at a 1:2 mean-motion
resonance orbit. Using a combination of transit depths spanning
optical to near-infrared wavelengths, we find that the atmosphere of
HAT-P-26b contains 2.4_-1.6+2.9% H2O with a derived temperature of
590-50+60K.
Description:
Between 2015 March and 2022 May, photometric follow-up observations of
HAT-P-26 b were obtained using the SPEARNET telescopes network:
2.4 m Thai National Telescope (TNT) located at the Thai National
Observatory (TNO), Thailand. During 2015-2019.
0.5 m Thai Robotic Telescope located at TNO (TRT-TNO), Thailand.
0.7 m Thai Robotic Telescope at the Gao Mei Gu Observatory (TRT-GAO),
China.
0.7 m Thai Robotic Telescope at the Sierra Remote Observatories
(TRT-SRO), USA.
Objects:
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RA (2000) DE Designation(s) (Period)
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14 12 37.53 +04 03 36.1 HAT-P-26 = 2MASS J14123753+0403359 (P=4.234)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 32 30751 The detrended and normalised photometry for
HAT-P-26 b using the telescopes within SPEARNET
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See also:
J/A+A/363/1081 : Non-linear limb-darkening law for LTE models (Claret 2000)
J/A+A/428/1001 : Non-linear limb-dark law for LTE models. III. (Claret, 2004)
J/AJ/142/84 : 10 new transit light curves of HAT-P-13b (Fulton+, 2011)
J/ApJ/728/138 : Follow-up photometry of HAT-P-26 (Hartman+, 2011)
J/MNRAS/427/343 : Infrared excesses of Hipparcos stars (McDonald+, 2012)
J/MNRAS/463/771 : ExoMol XVIII. VO high-temp spectrum (McKemmish+, 2016)
J/MNRAS/471/770 : Parameters & IR excesses of Gaia DR1 stars (McDonald+, 2017)
J/MNRAS/480/3397 : ExoMol line lists XXXI C2 (Yurchenko+, 2018)
J/MNRAS/488/2836 : ExoMol Molecular linelists. XXXIII. TiO (McKemmish+, 2019)
J/A+A/628/A116 : HAT-P-26 differential transit photometry (von Essen+, 2019)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- Epoch [421/1045] Epoch identifier
6- 6 A1 --- Filt Filter used
8- 20 F13.5 d BJD [2457087/2459730] Barycentric Julian Date;
TDB based
22- 26 F5.3 --- NFlux [0.96/1.04] Normalized flux in Filter
28- 32 F5.3 --- e_NFlux [0.002/0.03] Uncertainty in NFlux
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 11-Apr-2024