J/A+A/568/A127 Light curves of WASP-67 transit events (Mancini+, 2014)
Physical properties of the WASP-67 planetary system from multi-colour
photometry.
Mancini L., Southworth J., Ciceri S., Calchi Novati S., Dominik M.,
Henning T., Jorgensen U.G., Korhonen H., Nikolov N., Alsubai K.A.,
Bozza V., Bramich D.M., D'Ago G., Figuera Jaimes R., Galianni P.,
Gu S.-H., Harpose K., Hinse T., Hundertmark M., Juncher D., Kains N.,
Popovas A., Rabus M., Rahvar S., Skottfelt J., Snodgrass C., Street R.,
Surdej J., Tsapras Y., Vilela C., Wang X.-B., Wertz O.
<Astron. Astrophys. 568, A127 (2014)>
=2014A&A...568A.127M 2014A&A...568A.127M
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: planetary systems - stars: fundamental parameters -
techniques: photometric
Abstract:
The extrasolar planet WASP-67 b is the first hot Jupiter definitively
known to undergo only partial eclipses. The lack of the second and
third contact points in this planetary system makes it difficult to
obtain accurate measurements of its physical parameters. Aims. By
using new high-precision photometric data, we confirm that WASP-67 b
shows grazing eclipses and compute accurate estimates of the physical
properties of the planet and its parent star. Methods. We present
high-quality, multi-colour, broad-band photometric observations
comprising five light curves covering two transit events, obtained
using two medium-class telescopes and the telescope-defocussing
technique. One transit was observed through a Bessel-R filter and the
other simultaneously through filters similar to Sloan griz. We
modelled these data using jktebop. The physical parameters of the
system were obtained from the analysis of these light curves and from
published spectroscopic measurements. Results. All five of our light
curves satisfy the criterion for being grazing eclipses. We revise the
physical parameters of the whole WASP-67 system and, in particular,
significantly improve the measurements of the planet's radius and
density as compared to the values in the discovery paper. The transit
ephemeris was also substantially refined. We investigated the
variation of the planet's radius as a function of the wavelength,
using the simultaneous multi-band data, finding that our measurements
are consistent with a flat spectrum to within the experimental
uncertainties.
Description:
5 light curves of two transits of the extrasolar planetary system
WASP-67, observed on 2012 June 4 and 2013 June 22, are presented. Four
of the datasets were obtained using the MPG 2.2-m telescope, GROND
camera and filters similar to Sloan g', r', i', z', at the ESO
Observatory in La Silla (Chile). Another data set was obtained using
the 1.54-m Danish telescope, DFOSC camera and Bessel-R filter at the
ESO Observatory in La Silla (Chile).
Objects:
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RA (2000) DE Designation(s)
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19 42 58.51 -19 56 58.4 WASP-67 = 2MASS J19425852-1956585
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mpg2_2mg.dat 39 211 *Photometry of WASP-67 on 2012/06/04 (g MPG 2.2m)
mpg2_2mr.dat 39 211 *Photometry of WASP-67 on 2012/06/04 (r MPG 2.2m)
mpg2_2mi.dat 39 211 *Photometry of WASP-67 on 2012/06/04 (i MPG 2.2m)
mpg2_2mz.dat 39 213 *Photometry of WASP-67 on 2012/06/04 (z MPG 2.2m)
dk1_54m.dat 39 136 *Photometry of WASP-67 on 2013/06/22 (I DK 1.54m)
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Note on *.dat: Correspond to full table2 of the paper.
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See also:
J/A+A/558/A55 : Trans. planetary system HATS-2 (Mohler-Fischer+, 2013)
J/A+A/554/A28 : Transiting planetary system Qatar-1 (Covino+, 2013)
J/A+A/549/A10 : Transiting planetary system GJ1214 (Harpsoe+, 2013)
J/A+A/551/A11 : Transiting planetary system HAT-P-8 (Mancini+, 2013)
J/MNRAS/420/2580 : Transiting planetary system HAT-P-13 (Southworth+, 2012)
J/MNRAS/422/3099 : Transiting planetary system HAT-P-5 (Southworth+, 2012)
J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)
J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)
J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)
J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)
J/MNRAS/434/1300 : WASP-15 and WASP-16 light curves (Southworth+, 2013)
J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)
J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)
J/MNRAS/436/2 : Light curves of WASP-19 transit events (Mancini+, 2013)
J/A+A/557/A30 : Trans. planetary systems WASP-21 HAT-P-16 (Ciceri+, 2013)
J/MNRAS/430/2932 : Transiting planetary system WASP-44 (Mancini+, 2013)
J/A+A/562/A126 : Light curves of WASP-80 transit events (Mancini+, 2014)
Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1 A1 --- Band [grizI] Observed band
3- 15 F13.7 d BJD Barycentric JD for the midpoint of observation
(TDB, BJD-2400000)
18- 27 F10.7 mag dmag Differential magnitude of WASP-2
31- 39 F9.7 mag e_dmag Measurement error of the magnitude
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Acknowledgements:
Luigi Mancini, mancini(at)mpia.de,
Max Planck Institute for Astronomy, Germany
(End) L. Mancini [Max Planck Inst. for Astron.], P. Vannier [CDS] 16-Jul-2014