J/AJ/145/68 Five new transit light curves of TrES-3 (Jiang+, 2013)
Possible transit timing variations of the TrES-3 planetary system.
Jiang I.-G., Yeh L.-C., Thakur P., Wu Y.-T., Chien P., Lin Y.-L.,
Chen H.-Y., Hu J.-H., Sun Z., Ji J.
<Astron. J., 145, 68 (2013)>
=2013AJ....145...68J 2013AJ....145...68J
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, RI
Keywords: planetary systems - stars: individual: TrES-3 -
techniques: photometric
Abstract:
Five newly observed transit light curves of the TrES-3 planetary
system are presented. Together with other light-curve data from the
literature, 23 transit light curves in total, which cover an overall
timescale of 911 epochs, have been analyzed through a standard
procedure. From these observational data, the system's orbital
parameters are determined and possible transit timing variations
(TTVs) are investigated. Given that a null TTV produces a fit with
reduced χ2=1.52, our results agree with previous work, that TTVs
might not exist in these data. However, a one-frequency oscillating
TTV model, giving a fit with a reduced χ2=0.93, does possess a
statistically higher probability. It is thus concluded that future
observations and dynamical simulations for this planetary system will
be very important.
Description:
We monitor the TrES-3 system with the 0.8m telescope at Tenagra
Observatory in Arizona, USA. Five runs of transit observations were
successfully completed by our group (2010 May 25, 2010 Jun 11, 2010
Jun 15, 2010 Jun 19, 2010 Jun 28). For all these observations, the R
band was chosen and the exposure time was set to 100s. The field of
view was 14.8arcmin by 14.8arcmin, giving a scale of 0.87arcsec/pixel.
The images had a typical FWHM of 2.5pixels. A summary of the
observations is presented in Table1.
Objects:
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RA (ICRS) DE Designation(s) (Period)
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17 52 07.02 +37 32 46.2 TrES-3 = NAME TrES-3b (P=1.30618581)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 49 5 The log of observations
table6.dat 38 406 The photometric light-curve data
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See also:
J/AJ/142/84 : 10 new transit light curves of HAT-P-13b (Fulton+, 2011)
J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)
J/ApJ/691/1145 : Spectrophotometry of TrES-3 and TrES-4 (Sozzetti+, 2009)
J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009)
J/AJ/136/267 : Six occultations of the exoplanet TrES-3 (Winn+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 I1 --- Run Run number
3- 13 A11 "Y/M/D" ObsDate UT date of the observation
15- 21 F7.3 d JD0 Lower limit of the interval (JD-2455000)
23- 29 F7.3 d JD1 Upper limit of the interval (JD-2455000)
31- 32 I2 --- N Number of images
34- 37 F4.2 --- AirM0 Air mass (beginning)
38 A1 --- --- [-]
39- 42 F4.2 --- AirM1 Air mass (end)
44- 49 F6.4 --- rms Out-of-transit root mean square
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 11 A11 "Y/M/D" ObsDate UT date of the observation
13- 29 F17.9 d BJD Barycentric Julian Date (1)
31- 38 F8.6 --- Flux [0.968666/1.010122] Relative flux
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Note (1): Barycentric Dynamical Time (TDB) based.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 02-Apr-2014