SIMBAD references

2013A&A...549A..10H - Astronomy and Astrophysics, volume 549A, 10-10 (2013/1-1)

The transiting system GJ 1214: high-precision defocused transit observations and a search for evidence of transit timing variation.

HARPSOE K.B.W., HARDIS S., HINSE T.C., JORGENSEN U.G., MANCINI L., SOUTHWORTH J., ALSUBAI K.A., BOZZA V., BROWNE P., BURGDORF M.J., CALCHI NOVATI S., DODDS P., DOMINIK M., FANG X.-S., FINET F., GERNER T., GU S.-H., HUNDERTMARK M., JESSEN-HANSEN J., KAINS N., KERINS E., KJELDSEN H., LIEBIG C., LUND M.N., LUNDKVIST M., MATHIASEN M., NESVORNY D., NIKOLOV N., PENNY M.T., PROFT S., RAHVAR S., RICCI D., SAHU K.C., SCARPETTA G., SCHAEFER S., SCHOENEBECK F., SNODGRASS C., SKOTTFELT J., SURDEJ J., TREGLOAN-REED J. and WERTZ O.

Abstract (from CDS):

We present 11 high-precision photometric transit observations of the transiting super-Earth planet GJ1214b. Combining these data with observations from other authors, we investigate the ephemeris for possible signs of transit timing variations (TTVs) using a Bayesian approach. The observations were obtained using telescope-defocusing techniques, and achieve a high precision with random errors in the photometry as low as 1 mmag per point. To investigate the possibility of TTVs in the light curve, we calculate the overall probability of a TTV signal using Bayesian methods. The observations are used to determine the photometric parameters and the physical properties of the GJ1214 system. Our results are in good agreement with published values. Individual times of mid-transit are measured with uncertainties as low as 10s, allowing us to reduce the uncertainty in the orbital period by a factor of two. A Bayesian analysis reveals that it is highly improbable that the observed transit times is explained by TTV caused by a planet in the nominal habitable zone, when compared with the simpler alternative of a linear ephemeris.

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Journal keyword(s): planetary systems - stars: individual: GJ1214 - methods: statistical - methods: observational - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/549/A10): table1.dat 070610.dat 071410.dat 080210.dat 082110.dat 060311.dat 080610i.dat 082511g.dat 082511r.dat 082511z.dat 042910i.dat 042910r.dat>

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