J/A+A/551/A108 Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)
Multi-site campaign for transit timing variations of WASP-12 b:
possible detection of a long-period signal of planetary origin.
Maciejewski G., Dimitrov D., Seeliger M., Raetz St., Bukowiecki L.,
Kitze M., Errmann R., Nowak G., Niedzielski A., Popov V., Marka C.,
Gozdziewski K., Neuhaeuser R., Ohlert J., Hinse T.C., Lee J.W.,
Lee C.-U., Yoon J.-N., Berndt A., Gilbert H., Ginski C., Hohle M.M.,
Mugrauer M., Roll T., Schmidt T.O.B., Tetzlaff N., Mancini L.,
Southworth J., Dall'Ora M., Ciceri S., Zambelli R., Corfini G.,
Takahashi H., Tachihara K., Benko J.M., Sarneczky K., Szabo Gy.M.,
Varga T.N., Vanko M, Joshi Y.C., Chen W.P.
<Astron. Astrophys. 551, A108 (2013)>
=2013A&A...551A.108M 2013A&A...551A.108M
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, CCD
Keywords: planets and satellites: general - stars: individual: WASP-12 -
planets and satellites: individual: WASP-12 b
Abstract:
The transiting planet WASP-12 b was identified as a potential target
for transit-timing studies because a departure from a linear ephemeris
has been reported in the literature. Such deviations could be caused
by an additional planet in the system. We attempt to confirm the
claimed variations in transit timing and interpret their origin. We
organised a multi-site campaign to observe transits by WASP-12 b in
three observing seasons, using 0.5-2.6-metre telescopes. We obtained
61 transit light curves, many of them with sub-millimagnitude
precision. The simultaneous analysis of the best-quality datasets
allowed us to obtain refined system parameters, which agree with
values reported in previous studies. The residuals versus a linear
ephemeris reveal a possible periodic signal that may be approximated
by a sinusoid with an amplitude of 0.00068±0.00013d and period of
500±20 orbital periods of WASP-12 b. The joint analysis of timing
data and published radial velocity measurements results in a
two-planet model that explains observations better than do
single-planet scenarios. We hypothesise that WASP-12 b might not be
the only planet in the system, and there might be the additional
0.1MJup body on a 3.6-d eccentric orbit. A dynamical analysis
indicates that the proposed two-planet system is stable on long
timescales.
Description:
Light curves for sixty WASP-12 b's transits observed in 2010-2012 are
given. Data were collected with 0.5-2.6-m telescopes located in
thirteen observatories distributed around the world. Details on
observations, data reduction, and analysis are given in the source
paper.
Objects:
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RA (2000) DE Designation(s)
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06 30 32.79 +29 40 20.3 WASP-12 = TYC 1891-1178-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
w12data.dat 39 15602 Light curves of transits of WASP-12 b
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See also:
J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)
J/ApJ/715/421 : Relative photometry of WASP-3 (Tripathi+, 2010)
J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009)
J/A+A/539/A159 : WASP-4b transit griz light curves (Nikolov+, 2012)
J/ApJ/733/127 : Four transits of WASP-4b (Sanchis-Ojeda+, 2011)
J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)
J/A+A/530/A5 : WASP-4b thermal emission Ks-band detection (Caceres+, 2011)
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/ApJ/692/L100 : Relative photometry of WASP-10 (Johnson+, 2009)
J/A+A/535/A7 : Transit light curves of WASP-10 b (Maciejewski+, 2011)
J/A+A/502/391 : WASP-13b photometry and radial velocities (Skillen+, 2009)
J/ApJ/709/159 : Relative Ic photometry of WASP-17 (Anderson+, 2010)
J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)
J/A+A/513/L3 : WASP-19b H-band thermal emission (Anderson+, 2010)
J/A+A/519/A98 : Transit of exoplanet WASP-21b (Bouchy+, 2010)
J/A+A/534/A16 : WASP-22 & WASP-26 photometry & velocities (Anderson+, 2011
J/A+A/531/A24 : WASP-23 photometric & radial velocity data (Triaud+, 2011)
J/A+A/520/A56 : WASP-26b RV and photometric data (Smalley+, 2010)
J/ApJ/726/L19 : Gunn r photometry of WASP-30 (Anderson+, 2011)
J/A+A/549/A18 : WASP-30 & J1219-39 light + velocity curves (Triaud+, 2013)
J/A+A/531/A60 : WASP-31b photometry and radial velocities (Anderson+, 2011)
J/A+A/526/L10 : Transits 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)
J/A+A/531/A40 : Transits of WASP-39b (Faedi+, 2011)
J/A+A/533/A88 : WASP-50b photometry and radial velocities (Gillon+, 2011)
J/A+A/544/A72 : WASP-42 & WASP-49 photometry and velocities (Lendl+, 2012)
J/A+A/542/A4 : WASP-43b thirty eclipses (Gillon+, 2012)
J/A+A/547/A61 : WASP78 and WASP79 RV and photometric data (Smalley+, 2012)
J/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)
J/AJ/141/179 : Transits of TrES-4b, HAT-P-3b and WASP-12b (Chan+, 2011)
J/ApJ/727/125 : On the orbit of exoplanet WASP-12b (Campo+, 2011)
J/A+A/528/A65 : WASP-12b transits (Maciejewski+, 2011)
Byte-by-byte Description of file: w12data.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Tel Telescope code
17- 30 F14.6 d BJD Barycentric JD in Barycentric Dynamical Time
32- 39 F8.6 --- Flux Normalized flux
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Acknowledgements:
Gracjan Maciejewski, gm(at)astri.uni.torun.pl
(End) Gracjan Maciejewski [TCfA, Poland], Patricia Vannier [CDS] 07-Feb-2013