MDM Trouble Report for 2001 Jun 24

Telescope: 2.4m
Observer(s): John Thorstensen (Dartmouth)
Instrument: modspec + echelle

Problem(s) Encountered:
At HA = 5h 25m E and dec = +37, the telescope began to
slip east relative to the sky.  This was much too fast to guide
out -- it looked as if the track motors had cut out, but they 
hadn't, the telescope would intermittently pick up.  The problem
went away once lower HAs were reached. [I need to reach large
hour angles to squelch daily cycle count ambiguities in period
searches.]  During the slippage the RA readouts appeared to be
accurate (i.e., they were slipping, too.)  

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Submitted on 2001 Jun 25 [2:21:32]