J/AJ/164/198 Transit light-curve of TrES-3b and Qatar-1b (Mannaday+, 2022)
Revisiting the Transit Timing Variations in the TrES-3 and Qatar-1 Systems with
TESS Data.
Mannaday V.K., Thakur P., Southworth J., Jiang I.-G., Sahu D.K., Mancini L.,
Vanko M., Kundra E., Gajdos P., A-thano N., Sariya D.P., Yeh L.-C., Griv E.,
Mkrtichian D., Shlyapnikov A.
<Astron. J., 164, 198 (2022)>
=2022AJ....164..198M 2022AJ....164..198M
ADC_Keywords: Exoplanets; Photometry, VRI
Keywords: Exoplanets ; Hot Jupiters ; Tidal interaction ; Transit
photometry ; Transit timing variation method ; Radial velocity
Abstract:
We present and analyze 58 transit light curves of TrES-3b and 98
transit light curves of Qatar-1b, observed by the Transiting Exoplanet
Survey Satellite, plus two transit light curves of Qatar-1b, observed
by us, using a ground- based 1.23m telescope. These light curves are
combined with the best-quality light curves taken from the Exoplanet
Transit Database and the literature. The precisely determined
midtransit times from these light curves enable us to obtain the
refined orbital ephemerides, with improved precision, for both hot
Jupiters. From the timing analysis, we find indications of the
presence of transit timing variations (TTVs) in both systems. Since
the observed TTVs are unlikely to be short-term and periodic, the
possibility of additional planets in orbits close to TrES-3b and
Qatar-1b is ruled out. The possible causes of long-term TTVs, such as
orbital decay, apsidal precession, the Applegate mechanism, and
line-of-sight acceleration, are also examined. However, none of these
possibilities are found to explain the observed TTV of TrES-3b. In
contrast to this, line-of-sight acceleration appears to be a plausible
explanation for the observed TTV of Qatar-1b. In order to confirm
these findings, further high-precision transit and radial velocity
observations of both systems would be worthwhile.
Description:
Two transits of Qatar-1b were observed by us on 2016 August 17 and
2017 March 18 using the 1.23m Zeiss telescope at the Calar Alto
Observatory (CAHA) in Spain. We used the DLR MKIII 4kxk CCD camera,
which has pixels of size 15µm and gives a field of view of
21.5x21.5arcmin2. Both transits were observed through a Cousins R
filter, which was chosen as it is part of a well-known photometric
system and had a high throughput for Qatar-1.
Transiting Exoplanet Survey Satellite (TESS) observed 58 transits of
TrES-3b and 98 transits of Qatar-1b up to sector 48.
Objects:
--------------------------------------------------------
RA (2000) DE Designation(s)
--------------------------------------------------------
17 52 07.01 +37 32 46.2 TrES-3 = TrES-3
20 13 31.61 +65 09 43.4 Qatar-1 = HIDDEN NAME Qatar-1
--------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 47 24979 The transit light-curve data of TrES-3b and
Qatar-1b considered in this work
table4.dat 125 58 The Best-fit Values of Parameters for 58 TESS
Transit Light Curves of TrES-3b
table5.dat 125 100 The Best-fit Values of Parameters for 100 Transit
Light Curves of Qatar-1b
table6.dat 139 182 Mid-transit Times and Timing Residuals (O-C) for
182 Transit Light Curves of TrES-3b
table7.dat 139 228 Mid-transit Times (Tm) and Timing Residuals (O-C)
for 228 Transit Light Curves of Qatar-1b
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/ApJ/692/L9 : Tidal evolution transiting extrasolar planets (Levrard+, 2009)
J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)
J/ApJ/691/1145 : Spectrophotometry of TrES-3 and TrES-4 (Sozzetti+, 2009)
J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)
J/A+A/529/A75 : Limb-darkening coefficients (Claret+, 2011)
J/A+A/554/A28 : Qatar-1 differential light curve (Covino+, 2013)
J/AJ/145/68 : Five new transit light curves of TrES-3 (Jiang+, 2013)
J/ApJ/764/8 : APOSTLE r'-band transit lightcurves TrES-3b (Kundurthy+, 2013)
J/A+A/551/A108 : Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)
J/MNRAS/428/678 : Transit exoplanet TrES-3b CCD UBVR photometry (Turner+, 2013)
J/A+A/555/A92 : Transit timing variations on Qatar-1 (von Essen+, 2013)
J/A+A/564/A125 : AGN Torus model comparison of AGN in the CDFS (Buchner+, 2014)
J/ApJ/785/126 : HIRES radial velocity measurements (Knutson+, 2014)
J/MNRAS/444/776 : Transiting planets WASP-24, 25 and 26 (Southworth+, 2014)
J/A+A/577/A109 : Transit times of Qatar-1b (Maciejewski+, 2015)
J/AJ/151/17 : Eight transiting light curves of WASP-43b (Jiang+, 2016)
J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)
J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)
J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)
J/AJ/154/4 : Times of transits and occultations of WASP-12b (Patra+, 2017)
J/AcA/68/371 : WASP and KELT planet transits (Maciejewski+, 2018)
J/AJ/155/165 : Dissipation exoplanet hosts from tidal spin-up (Penev+, 2018)
J/AJ/157/217 : Transit times of 5 hot Jupiter WASP exoplanets (Bouma+, 2019)
J/MNRAS/490/4230 : Transiting planet WASP-4b (Southworth+, 2019)
J/ApJ/893/L29 : WASP-4 RVs & hot Jupiter predicted Per changes (Bouma+, 2020)
J/A+A/636/A98 : WASP-18A, WASP-19, WASP-77A photometry (Cortes-Zuleta+, 2020)
J/AJ/160/209 : K2 & TESS Synergy. I. Param & LC, 4 stars (Ikwut-Ukwa+, 2020)
J/AJ/159/150 : Transit times of 11 hot Jupiters (Patra+, 2020)
J/AJ/160/96 : CORALIE and PFS radial velocities of HD 86226 (Teske+, 2020)
J/ApJ/888/L5 : Transits, occultation times and RVs of WASP-12b (Yee+, 2020)
J/AJ/162/210 : Transit Time Vartiations (TTVs) of WASP-43 (Davoudi+, 2021)
J/A+A/656/A88 : TrES-5 photometric timeseries (Maciejewski+, 2021)
J/AJ/161/108 : R-band light curve of Qatar-1 (Su+, 2021)
J/AJ/161/72 : 180 Transit and occultation times for WASP-12b (Turner+, 2021)
J/AJ/163/77 : R and B photometry of hot Jupiter HAT-P-37b (A-thano+, 2022)
J/MNRAS/509/1447 : Light curves of KELT-16 (Mancini+, 2022)
J/MNRAS/515/3212 : Transiting planet HATS-18b (Southworth+, 2022)
J/AJ/163/281 : Radial velocity, transit & occultation WASP-4 (Turner+, 2022)
J/AJ/163/175 : WASP-12 individual transit fit with TESS (Wong+, 2022)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Object Name
9- 12 A4 --- Tel Telescope Name; CAHA or TESS
14- 17 I4 --- Epoch [1388/4006] Epoch number
19- 31 F13.5 d BJD [2457618/2459634] Barycentric Julian date; TDB based
33- 39 F7.5 --- NFlux [0.96/1.02] Normalized Flux
41- 47 F7.5 --- e_NFlux [0.001/0.005] Uncertaintity in NFlux
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[45].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Epoch Epoch number
6- 18 F13.5 d BJD Midtransit time in Barycentric Julian date; TDB
20- 26 F7.5 d E_BJD Upper 1σ uncertainty in BJD
28- 34 F7.5 d e_BJD Lower 1σ uncertainty in BJD
36- 40 F5.2 deg i Orbital Inclination in degree
42- 45 F4.2 deg E_i Upper 1σ uncertainty in orbital i
47- 50 F4.2 deg e_i Lower 1σ uncertainty in orbital i
52- 56 F5.3 solRad a/R* Scaled Semi-major axis in stellar radius
58- 62 F5.3 solRad E_a/R* Upper 1σ uncertainty in a/R*
64- 68 F5.3 solRad e_a/R* Lower 1σ uncertainty in a/R*
70- 75 F6.4 --- Rp/R* Ratio of planet to star radius
77- 82 F6.4 --- E_Rp/R* Upper 1σ uncertainty in Rp/R*
84- 89 F6.4 --- e_Rp/R* Lower 1σ uncertainty in Rp/R*
91- 95 F5.3 --- u1 Linear limb-darkening coefficient
97-101 F5.3 --- E_u1 Upper 1σ uncertainty in u1
103-107 F5.3 --- e_u1 Lower 1σ uncertainty in u1
109-113 F5.3 --- u2 Quadratic limb-darkening coefficient
115-119 F5.3 --- E_u2 Upper 1σ uncertainty in u2
121-125 F5.3 --- e_u2 Lower 1σ uncertainty in u2
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Byte-by-byte Description of file: table[67].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- Epoch Epoch number
6- 18 F13.5 d BJD Midtransit time in
Barycentric Julian date; TDB
20- 26 F7.5 d E_BJD Upper 1σ uncertainty in BJD
28- 34 F7.5 d e_BJD Lower 1σ uncertainty in
BJD
36- 45 F10.7 d O-C ? Timing residual of linear model
fit
47- 75 A29 --- Trans Transit source
77- 95 A19 --- TransBib ADS bibcode for transit source
97-117 A21 --- Timing Midtransit time source
119-137 A19 --- TimingBib ADS bibcode for timing source
139 A1 --- Excluded Data Excluded from timing analysis (1)
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Note (1): Data as follows
a = mid-transit time excluded from timing analysis
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 29-Nov-2022