WIYN 3.5m WHIRC Observing Report for  2013/04/20

Summary:

We observed 8 supernovae and 1 standard star. Here is a summary of observations:

Name                    | z      |  B-Peak  | 20130420
2013ar                  | 0.06   | 20130323 | 25,25,xx
CSS130317:082848+293031 | 0.08   | 20130319 | 41,36,xx
CSS130218:092354+385837 | 0.05   | 20130310 | xx,41,xx
CSS130415:130408+435408 | 0.06   | 20130424 | 25,25,xx
CSS130415:131729+424430 | 0.036  | 20130411 | 09,16,xx
PSNJ14211513+6134159    | 0.0364 | 20130426 | 16,16,xx
PSNJ17172203+4104002    | 0.0276 | 20130421 | 09,16,xx
SNhunt175               | 0.0409 | 20130318 | 20,16,xx

P212-C in JHKs at 1.02, 1.2, and 1.5 airmasses

Observer: Anja Weyant
Telescope Operator: Karen
Conditions:
wind: 2.9 mph
Humidity: 20.8
Temperature: 20.5 C
Light bands of cirrus drifting by but mostly clear
Seeing: 0.5-0.7" for most of the night.  Seeing around 1" in the morning. 
Moon: 76%

Notes:

Previous observer was worried about a "Herringbone" pattern.  I have seen this 
before in my darks.  It does not seem to impact our science images.  We should 
check this again in case it is getting worse.  It is clearly visible in the 
flats taken from this night.

In the middle of the J dither for 2013ar we had to pause the script for the 
unwrap. Probably two images are no good.  Also, I hit "Observe" and not 
"resume script" so there are a few images where it did not dither before I 
realized that I needed to hit resume script.

Lost guide star in the middle of 3x3x30" dither in H for CSS130317:082848+293031 
(image 197).At the beginning of the 5x5x15" dither in J the target seemed to 
be about an arcmin toofar E.  Probably related to losing guide star.  We moved 
the telescope 60" w to compensate.  Target may be a bit off-center.

Had to pause script a few times for the unwrap.  Did not have any trouble 
restarting script.

Took 520 images.