L′ and M′ Photometry of Ultracool Dwarfs

  title={L′ and M′ Photometry of Ultracool Dwarfs},
  author={David A. Golimowski and Sandy K. Leggett and Mark. S. Marley and X. L. Fan and Thomas R. Geballe and Gillian R. Knapp and Frederick John Vrba and Arne Anthon Henden and Christian B. Luginbuhl and Harry H. Guetter and Jeffrey A. Munn and Blaise Joseph Canzian and Wei Zheng and Zlatan I. Tsvetanov and Kuenley Chiu and Karl Glazebrook and Erik Andrew Hoversten and Donald P. Schneider and Jonathan Brinkmann},
  journal={The Astronomical Journal},
  pages={3516 - 3536}
We have compiled L′ (3.4–4.1 μm) and M′ (4.6–4.8 μm) photometry of 63 single and binary M, L, and T dwarfs obtained at the United Kingdom Infrared Telescope using the Mauna Kea Observatory filter set. This compilation includes new L′ measurements of eight L dwarfs and 13 T dwarfs and new M′ measurements of seven L dwarfs, five T dwarfs, and the M1 dwarf Gl 229A. These new data increase by factors of 0.6 and 1.6, respectively, the numbers of ultracool dwarfs (Teff ≲ 2400 K) for which L′ and M… 

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