J/A+A/579/A113 BR light curves of GJ1214b (Nascimbeni+, 2015)
Large Binocular Telescope view of the atmosphere of GJ 1214b.
Nascimbeni V., Mallonn M., Scandariato G., Pagano I., Piotto G., Micela G.,
Messina S., Leto G., Strassmeier K.G., Bisogni S., Speziali R.
<Astron. Astrophys., 579, A113-113 (2015)>
=2015A&A...579A.113N 2015A&A...579A.113N
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry, UBVRI
Keywords: techniques: photometric - planetary systems -
stars: individual: GJ1214
Abstract:
The atmospheric composition and vertical structure of the super-Earth
GJ 1214b has been a subject of debate since its discovery in 2009.
Recent studies have indicated that high-altitude clouds might mask the
lower layers. However, some data points that were gathered at
different times and facilities do not fit this picture, probably
because of a combination of stellar activity and systematic errors. We
observed two transits of GJ 1214b with the Large Binocular Camera, the
dual-channel camera at the Large Binocular Telescope. For the first
time, we simultaneously measured the relative planetary radius
k=Rp/R* at blue and red optical wavelengths (B+R), thus
constraining the Rayleigh scattering on GJ 1214b after correcting for
stellar activity effects. To the same purpose, a long-term photometric
follow-up of the host star was carried out with WiFSIP at STELLA,
revealing a rotational period that is significantly longer than
previously reported. Our new unbiased estimates of k yield a flat
transmission spectrum extending to shorter wavelengths, thus
confirming the cloudy atmosphere scenario for GJ 1214b.
Description:
We observed two complete transits of GJ1214b during the nights of
March 29 and May 17, 2012 with the LBC camera mounted at the double
8.4m Large Binocular Telescope (LBT).
We mounted a Bessel B and Bessel R filter on the blue and red channel,
respectively.
Objects:
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RA (2000) DE Designation(s) (Per)
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17 15 18.9 +04 57 50 GJ1214 = LHS 3275 (1.5804046)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
b1.dat 37 185 LBT/LBC Bessel B light curve of GJ1214b (2012/03/29)
r1.dat 37 207 LBT/LBC Bessel R light curve of GJ1214b (2012/03/29)
b2.dat 37 64 LBT/LBC Bessel B light curve of GJ1214b (2012/05/17)
r2.dat 37 123 LBT/LBC Bessel R light curve of GJ1214b (2012/05/17)
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See also:
J/A+A/559/A32 : Light curves of GJ3470b (Nascimbeni+, 2013)
Byte-by-byte Description of file: b1.dat b2.dat r1.dat r2.dat
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Bytes Format Units Label Explanations
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1- 17 F17.9 d BJD Barycentric Julian Day (TDB-based)
20- 27 F8.5 mag mag Normalized magnitude
31- 37 F7.5 mag e_mag Error on magnitude
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Acknowledgements:
Valerio Nascimbeni, valerio.nascimbeni(at)unipd.it
References:
Nascimbeni et al., Paper I 2013A&A...559A..32N 2013A&A...559A..32N, Cat. J/A+A/559/A32
(End) Valerio Nascimbeni [INAF-OAPD, Italy], Patricia Vannier [CDS] 28-Aug-2015