OPTICAL-IDENTIFICATION OF EUV SOURCES - THE SECRETS OF EUVE-J2056-17.1

We present optical, ultraviolet (UV), and extreme ultraviolet (EUV) re sults for a new active late-type dwarf star discovered by the Extreme Ultraviolet Explorer (EUVE). A large flare with an energy in excess of 10(35) erg and duration of similar to 1.1 days was detected in the EW E Lex/B band (60-200 Angstrom). The energetics of the event indicate t hat radiative losses in the EUV are a significant contributor to the e nergy budget in stellar flares. The ''quiescent'' EUV emission of the source is similar to the most active flare stars with the ''quiescent' ' optical spectrum showing strong H alpha, Ca II H & K, and Mg II h & k emission. A strong Li I 6707.8 Angstrom absorption line is also pres ent in the spectrum. We have estimated a Li abundance of log N(Li) = 2 .5+/-0.4. Although the high Li abundance suggests that EUVE J2056-17.1 is a young object having recently arrived on the main sequence; the h igh flare activity favours an interpretation where the enhanced Li is sustained by spallation reactions.