J/ApJ/692/L100 Relative photometry of WASP-10 (Johnson+, 2009) ================================================================================ A smaller radius for the transiting exoplanet WASP-10b. Johnson J.A., Winn J.N., Cabrera N.E., Carter J.A. =2009ApJ...692L.100J ================================================================================ ADC_Keywords: Planets ; Photometry ; Stars, double and multiple Keywords: instrumentation: detectors - planetary systems - stars: individual (WASP-10) - techniques: photometric Abstract: We present the photometry of WASP-10 during a transit of its short-period Jovian planet. We employed the novel point-spread function shaping capabilities of the Orthogonal Parallel Transfer Imaging Camera mounted on the UH 2.2m telescope to achieve a photometric precision of 4.7x10^-4^ per 1.3 minute sample. With this new light curve, in conjunction with stellar evolutionary models, we improve on existing measurements of the planetary, stellar, and orbital parameters. We find a stellar radius R_*_=0.698+/-0.012R_{sun}_ and a planetary radius R_P_=1.080+/-0.020R_Jup_. The quoted errors do not include any possible systematic errors in the stellar evolutionary models. Our measurement improves the precision of the planet's radius by a factor of 4, and revises the previous estimate downward by 16% (2.5{sigma}, where {sigma} is the quadrature sum of the respective confidence limits). Our measured radius of WASP-10b is consistent with previously published theoretical radii for irradiated Jovian planets. Description: We observed WASP-10 on UT August 16, spanning a transit time predicted by the ephemeris of Christian et al. (2009MNRAS.392.1585C). We used the Orthogonal Parallel Transfer Imaging Camera (OPTIC) on the University of Hawaii 2.2m telescope atop Mauna Kea, Hawaii. Objects: --------------------------------------------------- RA (2000) DE Designation(s) --------------------------------------------------- 23 15 58.3 +31 27 46 WASP-10 = GSC 02752-00114 --------------------------------------------------- File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 21 194 Relative photometry for WASP-10 (table from erratum in 2010ApJ...712L.122J) -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 F13.5 d HJD Heliocentric Julian Date 15- 21 F7.5 --- RFlux Relative Flux -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Feb-2011