J/A+A/563/A40 WASP-43b g'r'i'z'JHK light curves (Chen+, 2014)
Broad-band transmission spectrum and K-band thermal emission of WASP-43b as
observed from the ground.
Chen G., van Boekel R., Wang H., Nikolov N., Fortney J.J., Seemann U.,
Wang W., Mancini L., Henning T.
<Astron. Astrophys. 563, A40 (2014)>
=2014A&A...563A..40C 2014A&A...563A..40C
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: planetary systems - stars: individual: WASP-43 -
planets and satellites: atmospheres - techniques: photometric -
planets and satellites: fundamental parameters
Abstract:
We observed one transit and one occultation of the hot Jupiter
WASP-43b simultaneously in the g'r'i'z'JHK bands using the GROND
instrument on the MPG/ESO 2.2-meter telescope. From the transit event,
we have independently derived WASP-43's system parameters with high
precision, and improved the period to be 0.81347437(13) days. No
significant variation in transit depths is detected, with the largest
deviations coming from the i', H, and K bands. Given the observational
uncertainties, the broad-band transmission spectrum can be explained
by either (i) a flat featureless straight line that indicates thick
clouds, (ii) synthetic spectra with absorption signatures of atomic
Na/K or molecular TiO/VO that in turn indicate cloud-free atmosphere,
or (iii) a Rayleigh scattering profile that indicates high-altitude
hazes. From the occultation event, we detected planetary dayside
thermal emission in the K-band with a flux ratio of 0.197±0.042%,
which confirms previous detections obtained in the 2.09 micron narrow
band and Ks-band. The K-band brightness temperature 1878+108-116K
favors an atmosphere with poor day- to nightside heat redistribution.
We also have a marginal detection in the i'-band
(0.037+0.023-0.021%), which is either a false positive, a
signature of non-blackbody radiation at this wavelength, or an
indication of reflective hazes at high altitude.
Description:
7 transit light curves and 2 occultation light curves of the hot
Jupiter WASP-43b obtained on UT 2012/01/08 and 2012/03/03 using the
GROND camera on the MPG/ESO 2.2m telescope.
Objects:
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RA (2000) DE Designation(s)
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10 19 38.008 -09 48 22.59 WASP-43 = GSC 05490-00141
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tran_g.dat 86 81 g transit light curve of WASP-43b on 2012/01/08
tran_r.dat 86 81 r transit light curve of WASP-43b on 2012/01/08
tran_i.dat 86 81 i transit light curve of WASP-43b on 2012/01/08
tran_z.dat 86 81 z transit light curve of WASP-43b on 2012/01/08
tran_j.dat 86 243 J transit light curve of WASP-43b on 2012/01/08
tran_h.dat 86 235 H transit light curve of WASP-43b on 2012/01/08
tran_k.dat 86 240 K transit light curve of WASP-43b on 2012/01/08
occ_i.dat 86 96 i transit light curve of WASP-43b on 2012/03/03
occ_k.dat 86 381 K transit light curve of WASP-43b on 2012/03/03
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See also:
J/A+A/542/A4 : WASP-43b thirty eclipses (Gillon+, 2012)
Byte-by-byte Description of file: tran*.dat occ*.dat
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Bytes Format Units Label Explanations
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1 A1 --- Band [grizJHK] Observed band
3- 16 F14.6 d BJD Barycentric Julian Date (TDB standard)
18- 25 F8.6 --- RFluxc Corrected relative flux
27- 34 F8.6 --- e_RFluxc Corrected flux error
36- 43 F8.6 --- RFluxr Raw relative flux
45- 52 F8.6 --- e_RFluxr Raw flux error
54- 59 F6.2 --- dX Relative position drift in X direction
61- 66 F6.2 --- dY Relative position drift in Y direction
68- 73 F6.2 --- FWHMX FWHM in X direction
75- 80 F6.2 --- FWHMY FWHM in Y direction
82- 86 F5.3 --- AirM Airmass
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Acknowledgements:
Guo Chen, guochen(at)pmo.ac.cn
(End) Guo Chen [PMO], Patricia Vannier [CDS] 23-Jan-2014