Stability of the GHRS Side 1 Sensitivity
Abstract
The ultraviolet flux standard BD+28D4211 is observed with the GHRS and grating G140L to monitor the long-term stability of the instrument sensitivity between 1100A and 1640A. Four observations obtained on days 94.098, 94.164, 94.213, and 94.294 are available for the wavelength range 1100A - 1350A. Data for the range 1350A - 1600A are available for days 94.164, 94.213, and 94.294. The GHRS sensitivity between 1175A and 1640A is stable within 1.5%. We find marginal evidence for a sensitivity decrease below 1200A. The decrease is largest at the shortest wavelength observed (~5% at 1125 A) but has little statistical significance due to low counts at these wavelengths.
- Publication:
-
GHRS Instrument Science Report 069
- Pub Date:
- November 1994
- Bibcode:
- 1994ghrs.rept...69L
- Keywords:
-
- Hubble Space Telescope;
- HST;
- Space Telescope Science Institute;
- GHRS;
- Goddard High Resolution Spectograph