Physics Department, The University Of Rhode Island, Kingston, RI 02881
A 0.25m/0.32m lenseless
Schmidt camera mounted piggyback on the University of Rhode Island (URI)
astrometric reflector (Penhallow 1978) is used to determine the positions of
supernovae within 0.1 second of arc. Measurable 15.5 magnitude images can be
obtained on hypered Kodak SR-5 x-ray film in 4 minutes under favorable conditions.
Five exposures with about 16 reference stars are normally used.