Nightlog 2011-02-05

SA: Encarni
SO: Zolisa
Others:

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Summary
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. Cloudy and humid night again. Could not open.

. Repeated last night's calibration flats, adding also a Ne lamp. QTH1
seemed *much* dimmer for VCAM than last night. QTH2 much brighter. See
attached image (calsys.jpg): top row is for BCAM, bottom row VCAM.
From the left, the lamps used are: QTH1, QTH2 and Ne. The lamps now
give a consistent picture for each instrument, though VCAM still has
some sort of obscuration.

. Also checked stray light due to calsys lamp leaks with the cal
screen out (autocollimator also off). See attached image
(strayLight_calsys.jpg): Top left: all lamps off. Top right: QTH lamp
on. Bottom left: QTH1 on. Bottom right: Ne lamp on. Can clearly see
contamination from QTH2 (top right).

In terms of stats:

IMAGE MEAN MIDPT MODE STDDEV
MIN MAX
lamps_off.fits 270.6 279.2 288.3 64.78
9.667 531.
QTH2.fits 416.4 409.8 349. 93.09
64.5 787.5
QTH1.fits 274.5 283.5 292.6 64.21
16.5 532.
Ne.fits 271.1 279.8 285.9 64.93
9.5 532.

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