Our followup spectroscopy has identified two new companions as well as confirmed two companions previously identified from photometry, with spectral types of M7.5 - M9 and masses of ~ 15 - 60 Mjup, indicating a frequency for such wide substellar companions of ~ 0.6 + / -0.3 %. (arxiv.org)
In consequence, this population will typically be of later spectral types, which presents lower fractions of binary systems (Lada 2006); hence the impact of false alarms from faint EBs is less for deeper samples. (aanda.org)
By comparing their distribution with that of the Kepler Objects of Interest detected during the first six quarters of operation of the spacecraft, we infer the false positive rate of Kepler and study its dependence on spectral type, candidate planet size, and orbital period. (arxiv.org)