J/A+A/656/A88 TrES-5 photometric timeseries (Maciejewski+, 2021)
Revisiting TrES-5 b: departure from a linear ephemeris instead of
short-period transit timing variation.
Maciejewski G., Fernandez M., Aceituno F., Ramos J.L., Dimitrov D.,
Donchev Z., Ohlert J.
<Astron. Astrophys. 656, A88 (2021)>
=2021A&A...656A..88M 2021A&A...656A..88M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry, CCD
Keywords: stars: individual: GSC 3949-967 -
planets and satellites: individual: TrES-5 b
Abstract:
The orbital motion of the transiting hot Jupiter TrES-5 b was reported
to be perturbed by a planetary companion on a nearby orbit. Such
compact systems do not frequently occur in nature, and learning their
orbital architecture could shed some light on hot Jupiters' formation
processes. We acquired fifteen new precise photometric time series for
twelve transits of TrES-5 b between June 2019 and October 2020 using
0.9-2.0m telescopes. The method of precise transit timing was employed
to verify the deviation of the planet from the Keplerian motion.
Although our results show no detectable short-time variation in the
orbital period of TrES-5 b and the existence of the additional nearby
planet is not confirmed, the new transits were observed about two
minutes earlier than expected. We conclude that the orbital period of
the planet could vary in a long timescale. We found that the most
likely explanation of the observations is the line-of-sight
acceleration of the system's barycentre due to the orbital motion
induced by a massive, wide-orbiting companion.
Description:
New Light curves for transits of TrES-5 b observed in 2019-2020 are
given. Data were collected with 0.9-2.0m telescopes: the 1.5m
Ritchey-Chretien telescope (OSN150) at the Sierra Nevada Observatory
(OSN, Spain), the 2.0m Ritchey-Chretien-Coude telescope (ROZ) at the
National Astronomical Observatory Rozhen (Bulgaria), the 1.2m Trebur
one-meter telescope (TRE) at the Michael Adrian Observatory in Trebur
(Germany), and the 0.9m Ritchey-Chretien telescope (OSN90) at OSN.
Details on observations and data processing are given in the source
paper.
Objects:
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RA (2000) DE Designation(s)
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20 20 53.25 +59 26 55.6 TrES-5 = GSC 3949-967
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tr5lc.dat 42 7255 New transit light curves
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See also:
J/ApJ/741/114 : TrES-5 b transit light curves (Mandushev+, 2011)
Byte-by-byte Description of file: tr5lc.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d BJD Barycentric Julian date in Barycentric
Dynamical Time (BJD-2450000)
13- 20 F8.6 --- Flux Normalized flux
22- 29 F8.6 --- e_Flux Flux error
31- 36 A6 --- TelCode Telescope code (ROZ, TRE, OSN90 or OSN150)
38- 42 A5 --- Filt [R clear] Filter name
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Acknowledgements:
Gracjan Maciejewski, gmac(at)umk.pl
Institute of Astronomy, Nicolaus Copernicus University, Poland
(End) Gracjan Maciejewski [Copernicus Univ.], Patricia Vannier [CDS] 27-Oct-2021