MDM Observatory 2.4m Telescope Observing Report for 2015 May 11

Observer(s): Oey, Spencer
Institution(s): Michigan

Instrument: CCDS

Worked for 1.5 hours (all night)
Conditions were Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Clear, Winds Calm
   Mid: Clear, Winds Calm
   End: Clear, Winds Calm

Observing Summary:

Spent all night from 8:00 until 3:00 trying 
to get the pointing set up.  sometimes got it, and then
had a couple self-inflicted resets.  When lost, spent hours
trying to get it back.  Finally diagnosed that the default
pointing seems to be off by about 12 arcmin North.

Eric warned that the collimation is off.  This is indeed the
case -- images are severely distorted, look like cones.  Losing
lots of light from slit.  Makes using guider scary, but guider
seems to be working ok on the 3 exposures we tried, in spite
of the strange PSF.


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Submitted on 2015 May 12 [5:41:11]