16517

A special calibration program to better determine an adequate instrument set up comma cenwave and aperture comma to use for the NUV flat field. The Deuterium lamp that is used for the NUV flat field monitoring program has been generally fading comma but not at a predictable rate and one cenwave has even been increasing in brightness over the last few years. This program would measure the count rates at 9 different cenwaves to have a better handle on the current spectrum of the lamp. For this program we only need a decent enough SNR to reliably measure the global count rate (local SNR > 5) comma which is achievable with virgul500s exposures for each cenwave. These observations fit within 2 internal orbits. The apertures for each cenwave have been chosen to ensure that the global count rates are sufficient but not above the nonlinearity limit or unsafe for the detector.