Hatena::Groupkanatatmp

KANATA ObsLog

2009-04-15

[] ASAS J150946-2147.7 (J1509-21): gradual fading & no rapid fluctuation

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The outburst of an unidentified object, ASAS J150946-2147.7 (J1509-21), was reported on 6 Apr. We started monitoring of the object on 9 Apr. The object showed small (<0.1 mag), but clear modulations with time-scale of hours. It is now gradually fading with an average rate of ~0.05 mag/day. We also performed high speed photometry on 11 Apr, while no significant rapid variation (10 - 1000 sec) was seen.