J/A+A/513/L3 H-band thermal emission of exoplanet WASP-19b (Anderson+, 2010)
H-band thermal emission from the 0.79-day period planet WASP-19b.
Anderson D.R., Gillon M., Maxted P.F.L., Barman T.S., Collier Cameron A.,
Hellier C., Queloz D., Smalley B., Triaud A.H.M.J.
<Astron. Astrophys.513, L3 (2010)>
=2010A&A...513L...3A 2010A&A...513L...3A
ADC_Keywords: Binaries, eclipsing ; Planets ; Radial velocities ; Photometry
Keywords: binaries: eclipsing - stars: individual: WASP-19 - planetary systems -
techniques: photometric
Abstract:
We present the first ground-based detection of thermal emission from
an exoplanet in the H-band. Using HAWK-I on the VLT, we observed an
occultation of WASP-19b by its G8V-type host star. WASP-19b is a
Jupiter-mass planet with an orbital period of only 19 h, and thus,
being highly irradiated, is expected to be hot. We measure an H-band
occultation depth of (0.259+0.046-0.044)%, which corresponds to an
H-band brightness temperature of TH=2580±125K. A cloud-free
model of the planet's atmosphere, with no redistribution of energy
from day-side to night-side, under predicts the planet/star flux
density ratio by a factor of two. As the stellar parameters, and thus
the level of planetary irradiation, are well-constrained by
measurement, it is likely that our model of the planet's atmosphere is
too simple.
Description:
The host star WASP-19 was observed by VLT/HAWK-I in H-band on 2009 May
03. We provide here the resulting differential photometry (raw and
detrended). See the paper for details.
Objects:
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RA (2000) DE Designation(s)
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09 53 40.08 -45 39 33.1 WASP-19 = WASP 19
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
hawkihd.dat 32 276 Detrended HAWK-I H-band photometry
hawkihr.dat 70 276 Raw HAWK-I H-band photometry for the 11 chip
positions
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See also:
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/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/502/395 : WASP-11b (West+, 2009)
J/A+A/502/391 : WASP-13b photometry and radial velocities (Skillen+, 2009)
J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)
Byte-by-byte Description of file: hawkihd.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Barycentric Julian date
16- 23 F8.6 --- Flux Flux (relative)
25- 32 F8.6 --- e_Flux Uncertainty on Flux
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Byte-by-byte Description of file: hawkihr.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Chip [1/11] Chip position number
4- 19 F16.8 d BJD Barycentric Julian date
21- 29 F9.7 --- Flux Flux (relative)
31- 43 E13.8 --- e_Flux Uncertainty on Flux
45- 49 F5.6 --- Airmass Airmass
50- 52 A3 --- --- [000]
54- 61 F8.3 --- bg Background (electrons)
63- 67 F5.3 pix FWHM Full-width at half maximum of the PSF
68-70 A3 --- --- [000]
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Acknowledgements:
David R. Anderson, dra(at)astro.keele.ac.uk
(End) Patricia Vannier [CDS] 16-Apr-2010