Final Calibration of the Berkeley Extreme and Far-Ultraviolet Spectrometer on the ORFEUS-SPAS I and II Missions

The Berkeley Extreme and Far-Ultraviolet Spectrometer flew as part of the ORFEUS telescope on the ORFEUS-SPAS I and II space shuttle missions in 1993 and 1996, respectively. The data obtained by this instrument have now entered the public domain. To facilitate their use by the astronomical community, we have reextracted and recalibrated both data sets, converted them into a standard (FITS) format, and placed them in the Multimission Archive at STScI (MAST). Our final calibration yields improved wavelength scales and effective area curves for both data sets. Based on the development and utilization of the Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometers (ORFEUS), a collaboration of the Institute for Astronomy and Astrophysics at the University of Tübingen, the Space Astrophysics Group of the University of California, Berkeley, and the Landessternwarte Heidelberg.