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THE PROPERTIES OF THE 500 K DWARF UGPS J072227.51โ€“054031.2 AND A STUDY OF THE FAR-RED FLUX OF COLD BROWN DWARFS

THE PROPERTIES OF THE 500 K DWARF UGPS J072227.51โ€“054031.2 AND A STUDY OF THE FAR-RED FLUX OF COLD BROWN DWARFS

We present i and z photometry for 25 T dwarfs and one L dwarf. Combined with published photometry, the data show that the i - z, z - Y and z - J colors of T dwarfs are very red, and continue to increase through to the late-type T dwarfs, โ€ฆ