THE OM UV red leak and other NRCO

The OM UV filters have effective wavelengths of 2910, 2310, and 2120 angstroms for UVW1, UVM2, UVW2, respectively. Some evidence has shown that the UV filters might have a red leak which allows light outside nominal bandpass through to the detector. In order to get a quantitative measurement of the UV red leaks, we need to observe one set of stars with different spectral type and interstellar reddening. In this NRCO, we ask for 45 ks observing time to observe 5 targets, with spectral type from O5 to M3.5 and extinction up to Av15.8 mag. Each requested target should be observed in all six filters and two grisms. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]