J/A+A/567/A8 WASP-46b g'r'i'z'JHK occultation light curves (Chen+, 2014)
Observed spectral energy distribution of the thermal emission from the dayside
of WASP-46b.
Chen G., van Boekel R., Wang H., Nikolov N., Seemann U., Henning T.
<Astron. Astrophys. 567, A8 (2014)>
=2014A&A...567A...8C 2014A&A...567A...8C
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: stars: individual: WASP-46 -
planets and satellites: individual (WASP-46b) -
planets and satellites: atmospheres - stars: planetary systems -
techniques: photometric
Abstract:
We aim to construct a spectral energy distribution (SED) for the
emission from the dayside atmosphere of the hot Jupiter WASP-46b and
to investigate its energy budget. We observed a secondary eclipse of
WASP-46b simultaneously in the g'r'i'z'JHK bands using the GROND
instrument on the MPG/ESO 2.2m telescope. Eclipse depths of the
acquired light curves were derived to infer the brightness
temperatures at multibands that cover the SED peak. We report the
first detection of the thermal emission from the dayside of WASP-46b
in the K band at 4.2-sigma level and tentative detections in the H
(2.5-sigma) and J (2.3-sigma) bands, with flux ratios of
0.253+0.063-0.060%, 0.194±0.078%, and 0.129±0.055%,
respectively. The derived brightness temperatures (2306+177-187K,
2462+245-302K, and 2453+198-258K, respectively) are consistent
with an isothermal temperature profile of 2386K, which is
significantly higher than the dayside-averaged equilibrium
temperature, indicative of very poor heat redistribution efficiency.
We also investigate the tentative detections in the g'r'i' bands and
the 3-sigma upper limit in the z' band, which might indicate the
existence of reflective clouds if these tentative detections do not
arise from systematics.
Description:
7 occultation light curves of the hot Jupiter WASP-46b obtained on UT
2011/10/09 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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21 14 56.861 -55 52 18.45 WASP-46 = GSC 08797-00758
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
occ_g.dat 86 184 WASP-46b g' occultation light curve (2011/10/09)
occ_r.dat 86 183 WASP-46b r' occultation light curve (2011/10/09)
occ_i.dat 86 182 WASP-46b i' occultation light curve (2011/10/09)
occ_z.dat 86 183 WASP-46b z' occultation light curve (2011/10/09)
occ_j.dat 86 371 WASP-46b J occultation light curve (2011/10/09)
occ_h.dat 86 371 WASP-46b H occultation light curve (2011/10/09)
occ_k.dat 86 368 WASP-46b K occultation light curve (2011/10/09)
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See also:
J/MNRAS/430/2932 : WASP-44 griz light curves (Mancini+, 2013)
J/MNRAS/434/1300 : WASP-15 and WASP-16 light curves (Southworth+, 2013)
J/MNRAS/436/2 : Transits of WASP-19b (Mancini+, 2013)
J/A+A/563/A40 : WASP-43b g'r'i'z'JHK light curves (Chen+, 2014)
J/A+A/564/A6 : NIR emission from the dayside of WASP-5b (Chen+, 2014)
Byte-by-byte Description of file: 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 --- Fc [0.982/1.012] Corrected relative flux
27- 34 F8.6 --- e_Fc [0.0009/0.0053] Corrected flux error
36- 43 F8.6 --- Fr [0.978/1.015] Raw relative flux
45- 52 F8.6 --- e_Fr [0.0009/0.0053] Raw flux error
54- 59 F6.2 --- dX [-4.4/3.5] Relative position drift in X direction
61- 66 F6.2 --- dY [-3.4/3.4] Relative position drift in Y direction
68- 73 F6.2 --- FWHMX [2.4/18.2] FWHM in X direction
75- 80 F6.2 --- FWHMY [2.1/17.8] FWHM in Y direction
82- 86 F5.3 --- AirM [1.12/1.4] Airmass
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Acknowledgements:
Guo Chen, guochen(at)pmo.ac.cn
(End) Guo Chen [PMO], Patricia Vannier [CDS] 30-May-2014