... 12+log(O/H) = 8.92 (Anders & Grevesse [ 1989 ]).. MIDAS . MIDAS is an acronym for the European Southern Observatory package -- Munich Image Data Analysis System.. IRAF . IRAF: the Image Reduction and Analysis Facility is distributed by the National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy, In. AURA) under cooperative argeement with the National Science Foundation (NSF)...?ay . ...