A 15 second flat field observation followed by a 210 second dark count is performed at each of 10 discriminator threshold values for each detector. This test will execute once during Cycle 5. This test is an internal test which makes measurements of the Pt-Ne spectral calibration lamp SC2. The spectra obtained are used to calibrate the carrousel function, Y-deflection function, resolving power sensitivity, and scattered light. This test will executed every 4 months during Cycle 5 for a total of 3 times.
Some wavelengths are out of the nominally useful range but are used in determining the calibration.
Ech-B observations are through the LSA only. Col is used for all observations. The setups for Ech-B are chosen to be the same as those used in the Science Verification period, to be able to compare directly to the original calibrations. The goal of this program is to monitor and document the long-term behavior of the echelle and G140M sensitivities. The results of the test will be documented in an Instrument Science Report .