Abstract
We have explored the WISE All-Sky database applying various selection criteria to obtain sample of W2-only detected and low signal-to-noise (S/N≥ 8) late T and Y dwarf candidates. Spurious sources were removed using database selection criteria defined through analysis of a control sample comprising isolated point-like non-variable non-moving sources from the SDSS. We perform J-band photometric follow-up on 4- to 8-m class telescopes to prove the high proper motion and low temperature of these objects. The low resolution near-IR spectroscopy of the best candidates has confirmed a few late T dwarfs (>T8) and one Y dwarf. Here we will present a summary of ground based photometric and spectroscopic follow-up of the candidates.
