****************************************************** PR # 31009 We propose to obtain a 40 ksec image of the center of the Lupus 3 dar k cloud, which is a nearby (140 pc) star-forming region that has low extinction and is rich in low mass M-type pre-main-sequence stars. O ur objectives are: (i) to determine if the optical census of young M stars in Lupus 3 is complete, (ii) to determine how the X-ray propert ies of these stars vary with age and mass, (iii) to obtain estimates of flare temperatures and duty cycles in young M stars, and (iv) to identify the origin of the X-ray emission of the pair of rare young A-type stars HR5999/6000. ******************************************************