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C and RC band time-series observations of some bright ultracool dwarfs |
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| Authors: | Chris Koen |
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| Institution: | Department of Statistics, University of the Western Cape, Private Bag X17, Bellville, 7535 Cape, South Africa;South African Astronomical Observatory, PO Box 9, Observatory 7935, Cape, South Africa |
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| Abstract: | The results of more than 100 h of CCD photometric monitoring of 10 L dwarfs and two T dwarfs are presented. Reasonable evidence is shown for I C band variability in DENIS 0255?4700, DENIS 1705?0516 and 2M 2104?1037. Substantial brightening of the T dwarf binary ε Indi Bab was observed over the course of 3.6 h; it is unlikely that this could have been caused by surface spots. No unequivocal variability could be detected in the R C band. |
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| Keywords: | stars: low mass brown dwarfs stars: variables: other |
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