EUVE Deep Survey Observations of a Large Flare on AU MIC

We have made the first observation of a stellar flare in the EUV at 100 second time resolution. The flare was first detected on AU Mic by the EUVE Deep Survey Instrument at 12:38 UT on July 15, 1992, during a four-day observation from July 14 to 18, 1992. This was a large flare detected in the Lexan/boron band (centered at 100 Angstroms) with an observed peak count rate of approximately 7 counts per second, corresponding to a peak luminousity of 10(30) ergs sec(-1) in our bandpass. This is significantly above the measured quiescent level of 0.4 +/- 0.2 counts per second. The flare consisted of a peak lasting approximately 2 hours, followed by a decaying tail that lasted over a day. We compare this EUV observation with stellar flare observations in other bandpasses and discuss the implications of this long decay. This work has been supported by NASA grant NAGW-1290 and NASA contracts NAS5-30180 and NAS5-29298.