Program ID 6898: GHRS Cycle 6:
CRIMP2 - Condensed-Regimen Integrated Monitoring Program
for Side 2 of the GHRS
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Plan
Purpose: The purpose of this program is to monitor the sensitivity, wavelength and detector calibrations of Side 2.
Description: Four times per year (twice in Cycle 6) the following observations will be done:
DETECTOR CALIBRATIONS:
1) dark count measurement 2) focus check at nominal high voltage and tweak current 3) flat field exposure at center of photocathode 4) coarse sample mapping function at central y deflection 5) coarse line mapping function at central x deflection
SENSITIVITY MONITORING
The sensitivity calibration will be monitored with the UV spectrophotometric standard star BD+28D4211. The medium resolution gratings will measure the standard through the LSA and SSA. 5 observations will be made between 1200 and 3000 Å
WAVELENGTH MONITORING
The spectral cal lamp mini-functional test for the first order gratings will be done. It is an internal test which makes measurements of the lamp (SC2). It is used to monitor the carrousel function, y deflections, resolving power, and sensitivity.
Fraction of GO Programs Supported: All GHRS programs using gratings G160M (19%), G200M (7%), and G270M (15%).
Resources:
Observation: Internal-16 orbits (8 orbits for each of the 2 executions. Note: the internal orbits are full orbits). External-6 orbits (3 orbits for each of the 2 executions).
Analysis: 0.24 FTE. The data will be reduced and analyzed by a technical assistants, L. E. Sherbert (0.08 FTE) and A. Gonnella (0.08 FTE) under the supervision of an Instrument Scientist (0.04 FTE per execution for a total of 0.08 FTE).
Special Requirements: One complete set of observations (detector + sensitivity + wavelengths) should be on one SMS. The detector calibrations themselves should be executed within 24 hours. The 3 repeats should occur should occur every 120 +/- 10 days.
Accuracy: Relative sensitivities will be measured to better than 2%. Wavelengths should be good to within 1 diode RMS.
Products: The results of the test will be discussed in an ISR to be published 2 months after completion of the program.