J/A+A/552/A2 WASP-19b light curves (Lendl+, 2013)
A photometric study of the hot exoplanet WASP-19b.
Lendl M., Gillon M., Queloz D., Alonso R., Fumel A., Jehin E., Naef D.
<Astron. Astrophys. 552, A2 (2013)>
=2013A&A...552A...2L 2013A&A...552A...2L
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: planetary systems - techniques: photometric -
planets and satellites: atmospheres
Abstract:
The sample of hot Jupiters that have been studied in great detail is
still growing. In particular, when the planet transits its host star,
it is possible to measure the planetary radius and the planet mass
(with radial velocity data). For the study of planetary atmospheres,
it is essential to obtain transit and occultation measurements at
multiple wavelengths.
We aim to characterize the transiting hot Jupiter WASP-19b by deriving
accurate and precise planetary parameters from a dedicated observing
campaign of transits and occultations.
We have obtained a total of 14 transit lightcurves in the r'-Gunn,
I-Cousins, z'-Gunn, and I+z' filters and 10 occultation lightcurves in
z'-Gunn using EulerCam on the Euler-Swiss telescope and TRAPPIST. We
also obtained one lightcurve through the narrow-band NB1190 filter of
HAWK-I on the VLT measuring an occultation at 1.19 micron. We
performed a global MCMC analysis of all new data, together with some
archive data in order to refine the planetary parameters and to
measure the occultation depths in z'-band and at 1.19 micron.
We measure a planetary radius of Rp=1.376±0.046RJ, a planetary
mass of Mp=1.165±0.068MJ, and find a very low eccentricity of
e=0.0077(-0.0032/+0.0068), compatible with a circular orbit. We have
detected the z'-band occultation at 3 sigma significance and measure
it to be deltaFocc,z'=352±116ppm, more than a factor of 2 smaller
than previously published. The occultation at 1.19 micron is only
marginally constrained at deltaFocc,NB1190=1711(-726/+745)ppm.
We show that the detection of occultations in the visible range is
within reach, even for 1m class telescopes if a considerable number of
individual events are observed. Our results suggest an
oxygen-dominated atmosphere of WASP-19b, making the planet an
interesting test case for oxygen-rich planets without temperature
inversion.
Description:
We present photometric time-series obtained with EulerCam, TRAPPIST,
and HAWK-I during transits and occultations of WASP-19b.
Objects:
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RA (2000) DE Designation(s)
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15 59 50.95 -28 03 42.2 WASP-19 = 2MASS 15595095-2803422
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
euleric.dat 64 115 EulerCam photometry (I Cousins filter)
eulerr.dat 64 296 EulerCam photometry (r' Gunn filter)
eulerz.dat 64 898 EulerCam photometry (z' Gunn filter)
hawki.dat 64 108 HAWK-I photometry (NB1190 filter)
trapiz.dat 64 2273 TRAPPIST photometry (I+z' filter)
trapz.dat 64 814 TRAPPIST photometry (z' filter)
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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/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/A+A/530/A5 : WASP-4b thermal emission Ks-band detection (Caceres+, 2011)
J/A+A/539/A159 : WASP-4b transit griz light curves (Nikolov+, 2012)
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/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)
J/A+A/528/A65 : WASP-12b transits (Maciejewski+, 2011)
J/AJ/141/179 : Transits of TrES-4b, HAT-P-3b and WASP-12b (Chan+, 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 and 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/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/542/A4 : WASP-43b thirty eclipses (Gillon+, 2012)
J/A+A/544/A72 : WASP-42 and WASP-49 photometry and velocities (Lendl+, 2012)
J/A+A/533/A88 : WASP-50b photometry and radial velocities (Gillon+, 2011)
J/A+A/547/A61 : WASP78 and WASP79 RV and photometric data (Smalley+, 2012)
Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d HJD Heliocentric Julian Date (HJD-2450000)
15- 22 F8.6 --- Flux Normalized Flux
26- 33 F8.6 --- e_Flux Normalized Flux error
36- 41 F6.2 pix xshi Pixel shift in x-direction
44- 49 F6.2 pix yshi Pixel shift in y-direction
52- 55 F4.2 --- AM Airmass
58- 64 F7.2 --- Sky Sky level (Flux)
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Acknowledgements:
Monika Lendl, monika.lendl(at)unige.ch
(End) Patricia Vannier [CDS] 21-Feb-2013