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J/A+A/528/A65       WASP-12b transits                      (Maciejewski+, 2011)

High-precision photometry of WASP-12 b transits. Maciejewski G., Errmann R., Raetz St., Seeliger M., Spaleniak I., Neuhaeuser R. <Astron. Astrophys. 528, A65 (2011)> =2011A&A...528A..65M
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, CCD Keywords: planets and satellites: individual: WASP-12 b - stars: individual: WASP-12 Abstract: The transiting extrasolar planet WASP-12b was found to be the one of the most intensely irradiated exoplanets. It is unexpectedly bloated and is losing mass which may accrete into the host star. Our aim was to refine parameters of this intriguing system and search for signs of transit timing variations. We gathered high-precision light curves of two transits of WASP-12b. Assuming various limb darkening laws, we generated best-fitting models and redetermined parameters of the system. Error estimates were derived by the prayer bread method and Monte Carlo simulations. System's parameters obtained by us were found to agree with previous studies within one sigma. Use of the non-linear limb darkening laws resulted in the best- fitting models. With two new mid-transit times, the ephemeris was refined to BJDTDB=(2454508.97682±0.00020)+(1.09142245±0.00000033)E. Interestingly, indications for transit timing variation were detected at the level of 3.4 sigma. This signal could be induced by an additional planet in the system. Simplified numerical simulations showed that a perturber could be a terrestrial-type planet if both planets are in a low-order orbital resonance. However, we emphasise that further observations are needed to confirm variation and to put constraints on properties of the perturber. Description: Light curves of two WASP-12b's transits observed during 2 runs on 2 and 26 February, 2010 are given. Data were collected with the Calar Alto Faint Object Spectrograph (CAFOS) on the 2.2-m telescope at Calar Alto Observatory (Spain). Magnitudes in R band were determined with the aperture photometry method against comparison stars. Trends caused by differential atmospheric extinction were removed. Objects: ----------------------------------------------------------- RA (2000) DE Designation(s) ----------------------------------------------------------- 06 30 32.8 +29 40 20 WASP-12 = 2MASS J06303279+2940202 ----------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file rv.dat 34 243 *Light curve observed on 2 and 26 Feb, 2010
Note on rv.dat: For 26 Feb, 2010 observations, portion of data was lost due to bad weather
See also: J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010) J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009) J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009) J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009) J/A+A/501/785 : Discovery and characterization of WASP-6b (Gillon+, 2009) J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011) J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010) J/A+A/502/391 : WASP-13b photometry and radial velocities (Skillen+, 2009) J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009) J/A+A/513/L3 : H-band thermal emission of WASP-19b (Anderson+, 2010) J/A+A/519/A98 : Transit of exoplanet WASP-21b (Bouchy+, 2010) J/A+A/520/A56 : WASP-26b RV and photometric data (Smalley+, 2010) J/A+A/526/L10 : Photometic follow-up of WASP-33 (Herrero+, 2011) J/A+A/526/A130 : WASP-34b photometry and radial velocities (Smalley+, 2011) J/A+A/525/A54 : Transits of WASP-38b (Barros+, 2011) Byte-by-byte Description of file: rv.dat
Bytes Format Units Label Explanations
1- 14 F14.6 d JD Julian Day (1) 16- 24 F9.6 mag Rmag Relative magnitude in R band 27- 34 F8.6 mag e_Rmag Magnitude error
Note (1): 02/02/2010: JD=2455230, 26/02/2010: JD=2455254
Acknowledgements: Gracjan Maciejewski, gm(at)astri.uni.torun.pl
(End) Gracjan Maciejewski [TCfA, Poland], Patricia Vannier [CDS] 25-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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