MDM Observatory 2.4m Telescope Observer's Report for 2005 Apr 18

Observer(s): S. Lepine
Institution(s): AMNH

Instrument: Direct + Echelle

Worked for 9 hours (all night)
Conditions were Photometric most of the night.
No equipment or software problems were encountered.

Seeing and Weather:
   High Winds from 11pm until .
   Beg: Seeing 0.9 arcsec, Clear, Winds Moderate
   Mid: Seeing 1.4 arcsec, Clear, Winds High
   End: Seeing 1.5 arcsec, Clear, Winds High

Observing Summary:

Night started with excellent seeing, but increasing winds
(gusting at 20-25mph) ruined things a bit. The seeing became
variable, though still relatively decent. However, the 
telescope at times showed a small (<1 ) but noticeable N-S 
jitter that degraded the seeing and produced elongated PSFs. 
Observing tagets with the telescope pointing downwind 
eliminated the problem. 


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Submitted on 2005 Apr 19 [6:14:33]