Baseline Calibrations
A full set of calibration templates with standard instrument configurations and exposure times can be found in the LUCI OT Libraries -> Calibrations Folder.
LUCI Calibrations
| Observing Mode |
Instrument Configuration | Calibration Unit Flats | Arcs | Twilight Flats | Darks | Photometric Standards | Telluric |
|---|---|---|---|---|---|---|---|
| Imaging Seeing-Limited |
Camera: N3.75 Mask: No mask in use Diffuser: Mirror |
About Twilight Flats | Darks | About Photometric Standards | |||
| Imaging Diffraction-Limited |
Camera: N30 Mask: N30_FieldStop Diffuser: Mirror |
||||||
| Long-Slit Spectroscopy | Camera: N1.8 or N3.75 Mask: LS_0.25arcsec, LS_0.50arcsec, LS_0.75arcsec, LS_1.0arcsec, LS_1.5_2.0arcsec Diffuser: G210, G200 |
About Arcs |
Darks | About Photometric Standards | About Tellurics | ||
| Multi-Slit Spectroscopy | Camera: N1.8or N3.75 Mask: Custom Diffuser: G210, G200, |
*Scale times for custom mask slit widths |
*Scale times for custom mask slit widths |
Notes about scaling library exposure times:
- ARCS: Arc exposure times do not need to be scaled.
- FLATS: Templates are generated using the 1″ slit. For other slit widths scale inversely by the ratio of the slit widths (1″ slits should need half the time of 0.5″ slits) and also inversely as the square of the ratio of pixel scales (so flats with the N3.75 camera should take 4 times as long as the equivalent flats through the N1.8 camera).
The G040 grating for Ao spectroscopy is being installed in LUCI1 and is pending commissioning on both sides. It is not available for science.
