SIMBAD references

We present the results of intense photometric monitoring in the near-infrared (∼0.9µm) with the TRAPPIST robotic telescope of the newly discovered binary brown dwarf WISEJ104915.57-531906.1, the third closest system to the Sun at a distance of only 2pc. Our twelve nights of time-series photometry reveal a quasi-periodic (P=4.87±0.01h) variability with a maximum peak-peak amplitude of ∼11% and strong night-to-night evolution. We attribute this variability to the rotational modulation of fast-evolving weather patterns in the atmosphere of the coolest component (∼T1-type) of the binary. No periodic signal is detected for the hottest component (∼L8-type). For both brown dwarfs, our data allow us to firmly discard any unique transit during our observations for planets ≥2R_⊕. For orbital periods smaller than ∼9.5h, transiting planets are excluded down to an Earth-size.