1. UVIS Performance Status
Bill McClintock
UVIS Team Meeting

2. EUV Sensitivity Comparison
EUV sensitivity appears to be stable since the star burn
UVIS Team Meeting

3. EUV Flat Field Comparison
EUV flat field performance appears to be stable since the star burn
UVIS Team Meeting

4. FUV Sensitivity Comparison
FUV sensitivity appears to continuously decline at short wavelengths and increase at long wavelengths
UVIS Team Meeting

5. FUV Flat Field Comparison
Star burned rows have significant degradation
UVIS Team Meeting

6. FUV Sensitivity Comparison
FUV flat field shows evidence for Lyman Alpha ‘burn in’
UVIS Team Meeting

7. Calibration Red Patch 1999-016 Center Occultation lens in place
Mosaic
Center (Star burn)
Slit Drift-Spica Flat Field
Slit Drift-Spica Flat Field
Slit Step (12 rows)
Slit Step (12 rows)
Slit Step (12 rows)
Slit Step (64 rows)
Slit Drift (64 rows)
Slit Step (12 rows)
Slit Drift (14 rows)
UVIS Team Meeting

8. Calibration Red Patch
Based on observation, which included the occultation lens
Lens transmission removed using the ratio of lens/no lens observations.
Red patch corrector derived using the long-slit scan (all 64 rows)
Corrects the row to row variations in the flat field but not the column to column variations
Use FUV_red_patch_1 if there is no additional row to row flatfield corrector
Use FUV_red_patch_1_w_as_ff if you also apply Andrew Steffl’s flat field corrector
UVIS Team Meeting

9. Calibration Red Patch
Except for the star burned rows, the shape of row to row FUV sensitivity is constant to ~ 20%.
Star burn
UVIS Team Meeting