J/A+A/563/A21 GJ 1214 Trappist and Spitzer light curves (Gillon+, 2014)
Search for a habitable terrestrial planet transiting the nearby red dwarf
GJ 1214.
Gillon M., Deming D., Madhusudhan N., Deming D., Seager S., Zsom A.,
Knutson H.A., Lanotte A.A., Bonfils X., Desert J.-M., Delrez L., Jehin E.,
Fraine J.D., Magain P., Triaud A.H.M.J.
<Astron. Astrophys. 563, A21 (2014)>
=2014A&A...563A..21G 2014A&A...563A..21G
ADC_Keywords: Binaries, eclipsing ; Stars, double and multiple ; Planets ;
Photometry
Keywords: techniques: photometric - binaries: eclipsing -
stars: individual: GJ 1214 - planetary systems
Abstract:
High-precision eclipse spectrophotometry of transiting terrestrial
exoplanets represents a promising path for the first atmospheric
characterizations of habitable worlds and the search for life outside
our solar system. The detection of terrestrial planets transiting
nearby late-type M-dwarfs could make this approach applicable within
the next decade, with soon-to-come general facilities. In this
context, we previously identified GJ 1214 as a high-priority target
for a transit search, as the transit probability of a habitable planet
orbiting this nearby M4.5 dwarf would be significantly enhanced by the
transiting nature of GJ 1214 b, the super-Earth already known to orbit
the star. Based on this observation, we have set up an ambitious
high-precision photometric monitoring of GJ 1214 with the Spitzer
Space Telescope to probe the inner part of its habitable zone in
search of a transiting planet as small as Mars. We present here the
results of this transit search.
Description:
Files trappist.dat, spitzer1.dat, and spitzer2.dat contain the
photometric time-series presented in the paper and obtained by the
TRAPPIST and Spitzer telescopes.
Objects:
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RA (2000) DE Designation(s)
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17 15 18.94 +04 57 49.7 GJ 1214 = LHS 3275
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
trappist.dat 106 1659 TRAPPIST transit photometry (special I+z filter)
spitzer1.dat 184 1533 Spitzer channel 1 (3.6 microns) photometry
spitzer2.dat 184 12761 Spitzer channel 2 (4.5 microns) photometry
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See also:
J/A+A/471/L51 : Spitzer observations of the hot Neptune GJ 436b (Gillon+, 2007
J/A+A/474/293 : Radial velocities of GJ 674 (Bonfils+, 2007)
J/A+A/475/1125 : Characterization of the hot Neptune GJ 436b (Demory+, 2007)
J/A+A/493/645 : Gl 176 radial velocities (Forveille+, 2009)
J/A+A/528/A111 : GJ3634 radial velocity and 4.5um flux (Bonfils+, 2011)
J/A+A/546/A27 : Radial velocity and photometry for GJ3470 (Bonfils+, 2012)
J/A+A/556/A110 : GJ 163 HARPS radial velocity curves (Bonfils+, 2013)
Byte-by-byte Description of file: trappist.dat
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Bytes Format Units Label Explanations
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1- 16 F16.11 d BJD [5631/5700] Barycentric Julian date (UTC) at
mid-exposure (BJD-2450000)
18- 34 F17.15 --- NFlux [0.97/1.01] Normalized flux
36- 57 E22.16 --- e_NFlux Normalized flux error
59- 64 F6.2 pix dX Relative position drift in X direction
66- 71 F6.2 pix dY Relative position drift in Y direction
73- 85 F13.11 --- AirM Airmass
87- 93 F7.4 pix FWHM PSF Full-Width at Half-Maximum
95-103 F9.3 --- Bckg Background (ADU)
105-106 I2 s Texp [25] Exposure time
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Byte-by-byte Description of file: spitzer1.dat spitzer2.dat
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Bytes Format Units Label Explanations
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1- 18 F18.13 d BJD Barycentric Julian date (UTC), middle of the
64 subarray exposures (BJD-2450000)
20- 38 F19.17 --- NFlux Normalized flux
40- 63 E24.18 --- e_NFlux Normalized flux error
65- 82 F18.15 pix Xpos X position
84-101 F18.15 pix Ypos Y position
103-120 F18.16 pix FWHMx PSF Full-Width at Half-Maximum along X
122-139 F18.16 pix FWHMy PSF Full-Width at Half-Maximum along Y
141-164 F24.20 --- Bckg Background (ADU)
167-184 F18.16 s Texp [1.92] Exposure time per subarray image
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Acknowledgements:
Michael Gillon, michael.gillon(at)ulg.ac.be
(End) Patricia Vannier [CDS] 13-Jan-2014