# Mostly used fields 9h15m, -19d30'. WCS info in first images missing. Filters
# g_SDSS, i_SDSS (only a few).

OBS086 1-4: First images: attempts to achieve focus. Target 9h15m, -19d:30a'
5-8: Made PSF_anisotropy for these. Same field.
9-13: Attemps to determine alignment of N-S. Rotator needed offset of 6deg. to align.
12-13: used by Koen to confirm rotator offset was correct. Quite so.

-------- Restart of Instrument software (activate communication with TCS, so
-------- WCS info now available.

OBS086 1-2:  Ra, Dec, airmass info now in header
(numbering restarts)

BIAS086 1-3: normal biases

FOCUS086 2: Opague filter (oops)
3: Andrea added telescope offset to indicate exposure. Apparently leads to strange artifacts.
4: Telescope software displays strange M2 positions during focus sequence. Turns out a TCS wait command appears to return success before M2 finished movement.
5: Around this time Andrea introduced a forced sleep of 1 sec. after M2 movement6: Sleep increased to 3 sec.
....
10: Tried to get better focus through finer M2 steps.

--- In general focussing was somewhat hard because the guide probe and detector are apparently far apart

OBS086 3: SA107 rotator "0deg"
4: SA107 rotator "180deg"
5-6: defocussed field?
7-14: 8 point jitter
15-19: 5 point dither

20: Longer (120s) exposures to check ghosts.
21: Longer (120s) exposures to check ghosts. In #20: CCD95 and CCD96 crosstalk
22-26: Jitters