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The ORFEUS II Echelle Spectrometer: Instrument description, performance and data reduction
J. Barnstedt, N. Kappelmann, I. Appenzeller +11
During the second flight of the ORFEUS-SPAS mission in November/December 1996, the Echelle spectrometer was used extensively by the Principal and Guest Investigator teams as one of…
The ORFEUS II Echelle Spectrum of HD 93521: A reference for interstellar molecular hydrogen
J. Barnstedt, W. Gringel, N. Kappelmann +1
During the second flight of the ORFEUS-SPAS mission in November/December 1996, the Echelle spectrometer was used extensively by the Principal and Guest Investigator teams as one of…
ORFEUS II Echelle spectra: Molecular hydrogen at high velocities toward HD 93521
W. Gringel, J. Barnstedt, K. S. de Boer +3
Absorption lines of interstellar molecular hydrogen in the far ultraviolet (FUV) have been observed in the spectrum of the O9.5 halo star HD 93521, located some 1500 pc from the Ga…