The ORFEUS II Echelle spectrum of HD 93521: A reference for interstellar molecular hydrogen

During the second flight of the ORFEUS-SPAS mission in November/December 19 96, the Echelle spectrometer was used extensively by the: Principal and Gue st Investigator teams as one of the two focal plane instruments of the ORFE US telescope. The spectrum of IID 93521 was obtained during this mission wi th a total integration time of 1740s. This spectrum shows numerous sharp in terstellar absorption lines. We identified 198 lines of molecular hydrogen including at least 7 lines with a high velocity component. Also most of the 67 identified interstellar metal lilies are visible with a high velocity c omponent. We present; plots of the complete ORFEUS II Echelle spectrum together with tables of all identified interstellar absorption lines including all 14 det ectable H I lines. In addition several identified stellar lines, partially with narrow absorption components, anti stellar wind lines are given in a s eparate table.