J/A+A/614/A35 Differential photometry of GJ1214 (Mallonn+, 2018)
On the rotation period of GJ1214, its starspots, and the uncertainty on the
optical slope of the transmission spectrum.
Mallonn M., Herrero E., Juvan I.G., von Essen C., Rosich A., Ribas I.,
Granzer T., Alexoudi X., Strassmeier K.G.
<Astron. Astrophys. 614, A35 (2018)>
=2018A&A...614A..35M 2018A&A...614A..35M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Stars, M-type ; Planets ; Exoplanets ;
Photometry, CCD
Keywords: techniques: photometric - stars: activity -
stars: individual: GJ1214 - starspots
Abstract:
To investigate the star spots of the M dwarf GJ 1214, we conducted a
multi-color photometric monitoring from 2012 to 2016. We measured the
rotation period of the host star, measured an increase in variability
amplitude, determined the permanent spot filling factor, the spot
temperature contrast and persistent longitudes. We determined the
effect of the star spots on the planetary transmission spectrum.
Description:
The photometric monitoring data of GJ1214 have been observed with
STELLA/WiFSIP over five observing seasons. In the first season 2012,
the broad band filters V and I have been used. In the seasons 2013 to
2016, the filters B and V have been used.
Objects:
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RA (2000) DE Designation(s)
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17 15 18.94 +04 57 49.7 GJ1214 = LHS 3275
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gj1214ph.dat 39 942 Differential photometry of GJ1214
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See also:
J/ApJ/736/12 : Transit light curves of GJ1214 (Berta+, 2011)
J/A+A/549/A10 : Transits of GJ 1214 (Harpsoe+, 2013)
Byte-by-byte Description of file: gj1214ph.dat
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Bytes Format Units Label Explanations
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1- 3 I3 nm lambda Effective central wavelength (435, 548 or 880)
6- 8 I3 nm Width Wavelength FWHM
11- 21 F11.5 d Date Modified, barycentric Julian Date
(Julian Date - 2400000.5)
24- 30 F7.5 --- Flux Normalized relative flux
33- 39 F7.5 --- e_Flux Uncertainty on relative flux
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Acknowledgements:
Matthias Mallonn, mmallonn(at)aip.de
(End) Patricia Vannier [CDS] 12-Mar-2018