Q: Do the F/96 LP filters have accurate relative calibrations?
A: The F/96 LP filters transmissions have been checked using
on-orbit calibration observations and no discrepancies with the
published curves have been identified.
Q: Can a specific spectral region be resolved with the prisms?
A: Recent calibrations of the objective prisms have determined
the best wavelength dispersions and photometry for the wavelengths
1200-3000 Angstroms for the far-UV prism and 1600-4000
Angstroms for the near-UV prisms. Crossing various wide-band
filters with the prisms will help isolate the spectral region
of interest. The simulations using the foc.focprism package
are the best way to tell whether a particular feature will be
resolved and measurable (especially near the ends of the
well-calibrated regions, either on the red or blue ends).
Q: What spatial resolution is needed to get separate spectra from
multiple sources?
A: Any pair of sources at least 0.5 arceseconds apart will be
resolvable at the right orientation angle. Closer pairs
depends on the flux from the two sources.
Q: Will a specific source be detected using the objective prisms?
A: Given a source spectrum, the foc.focprism package routine
SIMPRISM can simulate any objective prism observation to
reasonable accuracy.
