Download BayTech PS-4A Troubleshooting guide

Halting A Script: Never type Ctrl-C. It is much safer to suspend a job with Ctrl-Z. Then you can kill the
script by typing jobs, and kill -9 %<job number>. If you are moving a wheel, please just wait for the wheel
motion to finish and the script to complete before trying again. If you are taking an image or a sequence of
images, wait until the script starts counting the number of seconds elapsed in the exposure before suspending
the script. Then run ufstop.pl -clean -stop, and start over. Never type Ctrl-C before the exposure time counter
has begun.
Imaging Sensitivity
FWHM = 3 pixels (0.95 arcsec)
Aperture 2.2 arcsec diameter
Band
e/s for
mag = 15
sky
10 σ limiting magnitude
mag arcsec-2
e sec-1 pixel-1
60 seconds
600 seconds
3600 seconds
J
3450
15.7
180
18.8
20.0
21.0
H
4480
13.9
1250
18.0
19.2
20.2
K
4360
12.9
3050
17.5
18.7
19.7
Ks
3800
13.1
2210
17.6
18.8
19.8
These data are from the KPNO FLAMINGOS web site, http://www.kpno.noao.edu/manuals/flmn.
The above data were for the original J, H, and Ks filters, which were loaned to UF from NOAO and Gemini.
New J, H, and Ks filters were installed during the summer of 2003. The signal levels with the new filters are
similar to those in the table.
Decker, Filter, Lyot, and Grism Wheel Positions
DECKER
FILTER
LYOT
GRISM
9000 STEPS
1250 STEPS
1250 STEPS
1250 STEPS
dark
0
J
0
Hartmann1
0
open1
0
imaging
2250
H
208
Hartmann2
178
JH
250
slit
4500
K
417
open
357
true-dark
500
mos
6750
HK
625
gemini
536
open2
750
JH
833
mmt
714
HK
1000
Ks
1042
4m
893
2.1m
1071
Note that the “true-dark” position in the Grism wheel is the only cold dark stop in the instrument and must
be used for obtaining any dark frames.
When using the config.rel.mv.filter.grism.decker.wheels.pl script [Move Wheels], the positions will be split into
positive and negative locations centered on the home position to minimize the motion time. Thus, the HK grism
will have a location step = -250 in that script.
FLAMINGOS@4-m, Ver. 2.39, 2013 April 23
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