Below are tables that provide estimates for the maximum number of counts
for a given exposure time for the various filters on both the red and
blue channels of LRIS. Please check the count level before acquiring
several flats in a row because the lamp intensity may vary with time and
dichroic used. .
...
LRIS BLUE: acquired with the mirror.
| |
Dome Lamp |
| |
Imaging |
Spectroscopic |
| Filter |
Time (s) |
Max counts (ADUs) |
Time (s) |
Max counts (ADUs) |
| U |
--- |
--- |
--- |
--- |
| B |
--- |
--- |
--- |
--- |
| G |
--- |
--- |
--- |
--- |
| V |
--- |
--- |
--- |
--- |
LRIS RED: acquired with no dichroic
| |
Dome Lamp |
| |
Imaging |
Spectroscopic |
| Filter |
Time (s) |
Max counts (ADUs) |
Time (s) |
Max counts (ADUs) |
| B |
--- |
--- |
--- |
--- |
| V |
--- |
--- |
--- |
--- |
| R |
--- |
--- |
--- |
--- |
| Rs |
--- |
--- |
--- |
--- |
| I |
--- |
--- |
--- |
--- |