WIYN 3.5m WHIRC Observing Report for 2015/04/24

Summary:

We observed 3 supernovae and 1 standard stars.

Name           | z        | B-Peak   | 20150424
ASASSN-15ho    | 0.0460   | 20150422 | 25,25,.. 
PS15aez        | 0.056    | 20150423 | 25,41,..
ASASSN-15hg    | 0.029771 | 20150420 | 16,16,.. **

P212-C in JHKs at 1.0
P212-C in JH at 1.5



Observer: Kara Ponder
Telescope Operator: Karen Butler
Conditions: Clear and breezy
wind: 25.5 mph,  up to 30 mph with gusts ~40 mph
Humidity: 44 % (up to 90% for about 10 minutes)
Temperature: 6.6 C
Seeing: 1.0
Moon: 43%

Notes:
We had the first half of the night.

We had to power cycle the DHE after getting no counts when we first turned on the detector (was not in use for ~13 days). 

Used WTTM on ASASSN-15ho and PS15aez. Had to switch to regular guiding for PS15aez because wind was too strong. 

** Failed to acquire one image while observing ASASSN-15hg. Usually the next frame has both images on it, but this time the next frame had an unusual pattern on it. The frame after that one got hung at "Read DHE" after integration. There were many errors in the PAN and it kept hanging at "Read DHE" step and never read out the image. The telescope would then dither and start integration again and get hung at "Read DHE". We finally paused the script and unloaded it. It would not read out a single image either. We shut everything down and brought it back up. Karent fixed the problem. Lost ~20 minutes. 

We took 302 images.