Hint of 150 MHz radio emission from the Neptune-mass extrasolar transiting planet HAT-P-11b A. Lecavelier des Etangs, S. K. Sirothia, Gopal-Krishna and P. Zarka A&A, 552 (2013) A65 Published online: 26 March 2013 DOI: 10.1051/0004-6361/201219789