Polarimetry Calibration Checklist

Switch on the lights in the observing room, and carefully install the calibration optics, then follow the checklist below (for each step, items in bold denote changes from the previous step).

X	Mode	Repeats	Beam Blocked?	LP angle	Retarder?
	Rotate the LP to 0$^\circ$ (40$^\circ$)
	Pol.sum Dark	5	Yes	0$^\circ$	No
	Pol.sum	5	No	0$^\circ$	No
	Pol.sum Calib	1	No	0$^\circ$	Yes
	Pol.sum Dark	5	Yes	90$^\circ$	Yes
	Pol.sum Calib	1	No	90$^\circ$	Yes
	Pol.sum	5	No	90$^\circ$	No
	Rotate the LP to 45$^\circ$ (85$^\circ$)
	Pol.sum Dark	5	Yes	45$^\circ$	No
	Pol.sum	5	No	45$^\circ$	No
	Pol.sum Calib	1	No	45$^\circ$	Yes
	Pol.sum Dark	5	Yes	135$^\circ$	Yes
	Pol.sum Calib	1	No	135$^\circ$	Yes
	Pol.sum	5	No	135$^\circ$	No
	Rotate the LP to 180$^\circ$ (220$^\circ$)
	Pol.sum Dark	5	Yes	180$^\circ$	No
	Pol.sum	5	No	180$^\circ$	No
	Pol.sum Calib	1	No	180$^\circ$	Yes
	Pol.sum Dark	5	Yes	270$^\circ$	Yes
	Pol.sum Calib	1	No	270$^\circ$	Yes
	Pol.sum	5	No	270$^\circ$	No
	Rotate the LP to 225$^\circ$ (265$^\circ$)
	Pol.sum Dark	5	Yes	225$^\circ$	No
	Pol.sum	5	No	225$^\circ$	No
	Pol.sum Calib	1	No	225$^\circ$	Yes
	Pol.sum Dark	5	Yes	315$^\circ$	Yes
	Pol.sum Calib	1	No	315$^\circ$	Yes
	Pol.sum	5	No	315$^\circ$	No

You can now remove the calibration optics.

No. frames:	........................
Date:	........................