We have conducted a mini-survey for low-frequency radio emission from some of the closest brown dwarfs to the Sun with rapid rotation rates: SIMP J013656.5+093347, WISEPC J150649.97+702736.0, and WISEPA J174124.26+255319.5. We have placed robust 3-sigma upper limits on the flux density in the 111 - 169 MHz frequency range for these targets: WISE 1506: < 0.72 mJy; WISE 1741: < 0.87 mJy; SIMP 0136: < 0.66 mJy. At 8 hours of integration per target to achieve these limits, we find that systematic and detailed study of this class of object at LOFAR frequencies will require a substantial dedication of resources.
@article{arxiv.1608.03852,
title = {A LOFAR mini-survey for low-frequency radio emission from the nearest brown dwarfs},
author = {Ben Burningham and M. Hardcastle and J. D. Nichols and S. L. Casewell and S. P. Littlefair and C. Stark and M. R. Burleigh and S. Metchev and M. E. Tannock and R. J. van Weeren and W. L. Williams and G. A. Wynn},
journal= {arXiv preprint arXiv:1608.03852},
year = {2016}
}