From: stephanie snedden
Subject: Re: 2.5m obslog 20061210 (MJD 54080)
Date: Mon, 11 Dec 2006 12:07:10 -0700
On Dec 11, 2006, at 4:56 AM, kpan@apo.nmsu.edu wrote:
>
>          2) three problems for SOP guider display, are they related?
This is a long-standing problem that was resolved by putting a second
gflat in the precalibration sequence. That's why there's a separate
GUI button for pre and post-cals. Now that we have ET slews that also
need two guider flats, we may want to reconsider this fix. I don't
recall the history behind this problem, but maybe Eric does.
>          a) on the SOP guider monitor (display), the gflats (from
>             the first gotoField -gflat) are not in the centers of
>             fibers, and the guider could not get stars to the
> corresponding
>             fiber center on the display. But we think that gflats
> and stars
>             are actually at centers of fibers. Display does not
> show their
>             position properly (see log for cartridge 5).
This is puzzling.  Were there nearby fibers that overlapped on the
display? When you run the cursor over the fiber 11 area on saoDisplay
do you see anything in the enlargement window in the upper right corner?
>          b) for all plats we observed tonight, fiber 11 does not
> have image
>             on the display, but has flux and fwhm measurements which
>             look real (they change with other fibers in a proper
> manner).
Fiber 6 is guiding on a hot pixel when it says the FWHM is 0.98. We
should get new guider darks soon. In the meantime, please disable
fiber 6 for guiding when this happens.
>          c) For all plates we observed tonight, fiber 6 had fwhm
> measurements
>             of 0.98 which is not really for most of time. But
> occasionally,
>             it had true fwhm measurement.
>