MDM Trouble Report for 2015 Dec 09

Telescope: 2.4m
Observer(s): Stephen Lawrence (Hofstra/Columbia)
Instrument: OSMOS (imaging mode)

Problem(s) Encountered:
Had troubles with IRAF communicating with ds9, until I found a second ds9 
window the previous observers had been using.  Closing IRAF and both ds9's
and then relaunching from the icons up top fixed the problem.
The  set std image=imt4096  command should be run when using such a big chip.

Is the CCD temperature directly displayed anywhere?

I noted that when a bright or saturated star fell on the chip, particularly near the
center, a four-fold symmetry pattern was produced---cross talk between the
readout amplifiers?  Is this issue known?  I can provide examples.

I was using a narrow-band filter for this first night, and noted either the bandpass
shifted dramatically at low X pixel values or the finder camera pickoff vignettes
the CCD strongly, even when placed at the very outer limit of suitable guide stars
in JSkyCalc.  I suspect it may be the guide probe, but I did have it on one of the
furthest out stars available.  I kept the guider in the same place for my morning
sky flats.

In which directory does the  Target File  get written, when you give it a name and
have it append objects into it?  I couldn't get it to read a file I had written in
/data/hiltner, and I couldn't find the file  Lawrence  that I asked it to append new
target entries into.

I couldn't get the stars in the guider camera to be fully in focus.  The guiding was
more erratic than the 1.3m guider was showing.


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Submitted on 2015 Dec 10 [7:45:44]