J/A+A/555/A92 Transit timing variations on Qatar-1 (von Essen+, 2013)
Qatar-1: indications for possible transit timing variations.
von Essen C., Schroter S., Agol E., Schmitt J.H.M.M.
<Astron. Astrophys. 555, A92 (2013)>
=2013A&A...555A..92V 2013A&A...555A..92V
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: methods: data analysis - methods: observational -
techniques: photometric - eclipses
Abstract:
Variations in the timing of transiting exoplanets provide a powerful
tool detecting additional planets in the system. Thus, the aim of this
paper is to discuss the plausibility of transit timing variations on
the Qatar-1 system by means of primary transit light curves analysis.
Furthermore, we provide an interpretation of the timing variation.
We observed Qatar-1 between March 2011 and October 2012 using the 1.2m
OLT telescope in Germany and the 0.6m PTST telescope in Spain. We
present 26 primary transits of the hot Jupiter Qatar-1b. In total, our
light curves cover a baseline of 18 months.
We also refine the ephemeris of Qatar-1b, which we find to be
T0=2456157.42204±0.0001BJDTDB and P=1.4200246±0.0000007 days,
and improve the system orbital parameters.
Description:
The OLT data were taken between March 2011 and October 2012 using an
Apogee Alta U9000 CCD with a 9'x9' field of view.
The PTST data were taken between May and August 2012 using a Santa
Barbara CCD with a 30'x30' field of view in a 3x3 binning and a Baade
R-band filter setup.
Objects:
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RA (2000) DE Designation(s) (Period)
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20 13 31.62 +65 09 43.5 Qatar 1 = GSC 04240-00470 (P=1.4200246)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 47 26 List of light curves
lc/* . 26 Individual light curves
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See also:
J/A+A/554/A28 : Qatar-1 differential light curve (Covino+, 2013)
Byte-by-byte Description of file: list.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Tel Telescope used (1)
6- 15 A10 "DD/MM/YYYY" Date Observation date (DD-DD/MM/YYYY)
17- 19 I3 s ET Exposure time
21- 47 A27 --- FileName Name of the light curve file in
"lc" subdirectory
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Note (1): Telescope used as follows:
OLT = 1.2m Oskar-Luhning telescope at Hamburg Observatory, Germany
PTST = 0.6m Planet Transit Study Telescope at the Mallorca Observatory, Spain
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Byte-by-byte Description of file: lc/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d BJD Barycentric Julian date in barycentric dynamical
time
16- 23 F8.6 --- Flux Normalized flux
25- 35 F11.9 --- e_Flux Flux error (individual photometric error)
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Acknowledgements:
Carolina von Essen, cessen(at)hs.uni-hamburg.de
(End) C. von Essen [Hamburger Sternwarte], P. Vannier [CDS] 07-Jun-2013