$ 16:45: Biases and 900-sec Dark

$ 18:30: The fog has lifted, but it's still mostly couldy, and humidity is 98%. The satellite images look promising, though.

$ 19:00: It's still almost completely overcast, and the humidity is 99%, so there's no chance to do twilight flats this evening.

$ 20:00: Dome flats!

Dome was illuminated, but roof lights and stairwell lights were off.
V 3 sec 30,000 counts
R 3 sec 33,000 counts
U 600 sec 30,000 counts
B 20 sec 30,000 counts
G 3 sec 20,000 counts

$ 22:00: Humidity still >99%. Dome flats continue...

Jose did a quick comparison of the R-band dome flats to R-band sky flats taken 2 days ago. The ratio image shows variations on order of 10% across the detector. Not too bad.

$ 00:00: Humidity remains at 99%, but the sky is finally mostly clear.

$ 02:30: Humidity now 98%. At this rate, we'll be able to open the dome in a mere 20 hours...

$ 04:00: Humidity now 97.4%.

-- JasonHarris - 14 Apr 2007
Topic revision: r6 - 14 Apr 2007, JasonHarris
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