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J/A+A/527/A8        Transiting planetary system WASP-7      (Southworth+, 2011)

A much lower density for the transiting extrasolar planet WASP-7. Southworth J., Dominik M., Jorgensen U.G., Rahvar S., Snodgrass C., Alsubai K., Bozza V., Browne P., Burgdorf M., Calchi Novati S., Dodds P., Dreizler S., Finet F., Gerner T., Hardis S., Harpsoe K., Hellier C., Hinse T.C., Hundertmark M., Kains N., Kerins E., Liebig C., Mancini L., Mathiasen M., Penny M.T., Proft S., Ricci D., Scarpetta G., Schaefer S., Schoenebeck F., Surdej J. <Astron. Astrophys. 527, A8 (2011)> =2011A&A...527A...8S
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry Keywords: planets and satellites: fundamental parameters - planetary systems - stars: individual: WASP-7 Abstract: We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought. The planet has a significantly larger radius and much lower density and surface gravity than previous measurements showed. Based on the revised properties it is no longer an outlier in planetary mass-radius and period-gravity diagrams. We obtain a more precise transit ephemeris for the WASP-7 system. Description: A light curve of one transit of the extrasolar planetary system WASP-7 is presented. The data were obtained using the Danish 1.5m telescope and DFOSC camera at ESO La Silla in 2010, with substantial telescope defocussing in order to improve the photometric precision of the observations. A Johnson I filter and exposure times of 60s were used. Objects: ---------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------- 20 44 10.22 -39 13 30.9 WASP-7 = HD 197286 ---------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file wasp7.dat 36 217 Defocussed photometry of WASP-7
See also: J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009) J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009) J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009) J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010) Byte-by-byte Description of file: wasp7.dat
Bytes Format Units Label Explanations
1- 13 F13.7 d BJD(TDB) Barycentric JD for the midpoint of observation 16- 25 F10.7 mag Imag Differential I-band magnitude of WASP-7 28- 36 F9.7 mag e_Imag Measurement error of the I-band magnitude
Acknowledgements: John Southworth, jkt(at)
(End) John Southworth [Keele Univ., UK], Patricia Vannier [CDS] 06-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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