We report the discovery of two new transiting planets from the WASP survey. WASP-42 b is a 0.500 +/- 0.035 M_jup planet orbiting a K1 star at a separation of 0.0548 +/- 0.0017 AU with a period of 4.9816872 +/- 7.3 x 10^-6 days. The radius of WASP-42 b is 1.080 +/- 0.057 R_jup while its equilibrium temperature is T_eq = 995 +/- 34 K. We detect some evidence for a small but non-zero eccentricity of e=0.060 +/- 0.013. WASP-49 b is a 0.378 +/- 0.027 M_jup planet around an old G6 star. It has a period of 2.7817387 +/- 5.6 x 10^-6 days and a separation of 0.0379 +/- 0.0011 AU. This planet is slightly bloated, having a radius of 1.115 +/- 0.047 R_jup and an equilibrium temperature of T_eq = 1369 +/- 39 K. Both planets have been followed up photometrically, and in total we have obtained 5 full and one partial transit light curves of WASP-42 and 4 full and one partial light curves of WASP-49 using the Euler-Swiss, TRAPPIST and Faulkes South telescopes.
@article{arxiv.1205.2757,
title = {WASP-42 b and WASP-49 b: two new transiting sub-Jupiters},
author = {M. Lendl and D. R. Anderson and A. Collier-Cameron and A. P. Doyle and M. Gillon and C. Hellier and E. Jehin and T. A. Lister and P. F. L. Maxted and F. Pepe and D. Pollacco and D. Queloz and B. Smalley and D. Segransan and A. M. S. Smith and A. H. M. J. Triaud and S. Udry and R. G. West and P. J. Wheatley},
journal= {arXiv preprint arXiv:1205.2757},
year = {2012}
}