J/A+A/518/A25 Transits of HD40307b by Spitzer (Gillon+, 2010)
The Spitzer search for the transits of HARPS low-mass planets.
I. No transit for the super-Earth HD40307b.
Gillon M., Deming D., Demory B.-O., Lovis C., Seager S., Mayor M., Pepe F.,
Queloz D., Segransan D., Udry S., Delmelle S., Magain P.
<Astron. Astrophys. 518, A25 (2010)>
=2010A&A...518A..25G 2010A&A...518A..25G
ADC_Keywords: Binaries, eclipsing ; Photometry, millimetric/submm
Keywords: binaries: eclipsing - planetary systems -
stars: individual: HD 40307 - techniques: photometric
Abstract:
We used Spitzer and its IRAC camera to search for the transit of the
super-Earth HD 40307b. The hypothesis that the planet transits could
not be firmly discarded from our first photometric monitoring of a
transit window because of the uncertainty coming from the modeling of
the photometric baseline. To obtain a firm result, two more transit
windows were observed and a global Bayesian analysis of the three IRAC
time series and the HARPS radial velocities was performed.
Unfortunately, the hypothesis that the planet transited during the
observed phase window is firmly rejected, while the probability that
the planet does transit but that the eclipse was missed by our
observations is nearly negligible (0.26%)
Objects:
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RA (2000) DE Designation(s)
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05 54 04.2 -60 01 24 HD 40307 = GJ 2046
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
irac1.dat 57 1295 1295 measurements obtained at 8 microns with
SPITZER/IRAC on 31 October 2008
irac2.dat 57 1105 1105 measurements obtained at 8 microns with
SPITZER/IRAC on 02 February 2009
irac3.dat 57 1105 1105 measurements obtained at 8 microns with
SPITZER/IRAC on 13 March 2009
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Byte-by-byte Description of file: irac1.dat irac2.dat irac3.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d HJD Heliocentric Julian date
18- 34 F17.15 --- Flux Normalized 8um flux
36- 57 E22.16 --- e_Flux rms uncertainty on Flux
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Acknowledgements:
Mickael Gillon, michael.gillon(at)ulg.ac.be
(End) Patricia Vannier [CDS] 13-Jul-2010