1. Where do I get BEFS archival data?
2. What are the differences between BEFS I and BEFS II?
For BEFS II, two of the four diffraction grating were overcoated
with silicon carbide and the instrument electronics were modified
for improved imaging at high count rates. Three apertures were added
for spectroscopy: 1) with an on-axis 26" hole, 2) a second clear hole displaced by 2.4' and 1.4 times larger for diffuse sky glow or serendipitous
spectroscopy, and 3) a large 2' aperture with a tin filter opaque to FUV
radiation, but transparent in the EUV and used primarily for observations
of epsilon CMa.
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