Photometric follow-up of the transiting planet WASP-1b
Abstract
We report on photometric follow-up of the recently discovered transiting planet WASP-1b. We observed two transits with the Wise Observatory 1-m telescope, and used a variant of the Eclipsing Binary Orbit Program (EBOP) code together with the Sys-Rem detrending approach to fit the light curve. Assuming a stellar mass of 1.15 M⊙, we derived a planetary radius of Rp= 1.40 ± 0.06RJ and mass of Mp= 0.87 ± 0.07MJ. An uncertainty of 15 per cent in the stellar mass results in an additional systematic uncertainty of 5 per cent in the planetary radius and of 10 per cent in planetary mass. Our observations yielded a slightly better ephemeris for the centre of the transit: Tc [HJD]= (245 4013.3127 ± 0.0004) +Ntr(2.51996 ± 0.00002). The new planet is an inflated, low-density planet, similar to HAT-P-1b and HD 209458b.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- April 2007
- DOI:
- 10.1111/j.1365-2966.2007.11537.x
- arXiv:
- arXiv:astro-ph/0610556
- Bibcode:
- 2007MNRAS.376.1296S
- Keywords:
-
- techniques: photometric;
- stars: individual: WASP-1;
- planetary systems;
- Astrophysics
- E-Print:
- Revised version accepted for publication in MNRAS