****************************************************** PR # 41282 We propose follow up 2 pointing observations of multi z system QSOs in Braccesi Field with ASCA. There is a concentration of 35 QSOs/1.7deg**2 with z = 0.2 - 2.2 and are full observations of Einstein IPC/HRI, optical and radio. The main purpose of these observations is to acquire energy spectra of faint "normal" (not OVVs nor BL Lacs) QSOs efficiently and to understand their evolution and contribution to the CXB in 2-10 keV range. Preliminary AO-3 analysis detects as many sources as expected and shows the uniqueness of this field. ******************************************************