Troubleshooting guide

the actual present bias value hit the Update All button on the UFSTATUS GUI.
WEATHER A numerical descriptor of common environmental conditions (1=photometric, 2=thin
cirrus, 3=broken clouds, 4=overcast, 5=snowing, 6=fog).
WIND A numerical range descriptor of the wind speed (1=calm, 2=low, 3=moderate, 4=high,
5=closed).
After prompting you for all of these parameters, config.exposure.pl will ask if you want to change the
bias. If you do it will automatically run the script set.bias.pl. In imaging mode, the bias should always be
set to 1.0 V.
If you wish to change just the exposure time or the filename, and don't want to run through the entire list of
parameters, then use any of the set.exposuretime.pl or set.filename.pl.
D. Taking Images at a Single Pointing
The most useful script for quickly looking at an image with the present telescope pointing and instrument
configuration is singleimage.pl. This takes an image immediately upon hitting return and displays in ds9.
E. Taking Dithered Images
FLAMINGOS also has the ability to take a sequence of images using a set of pre-determined dither patterns. In
order to configure the dither pattern, run config.dither.kpno.pl. This allows you to change the following
parameters:
DPATTERN The desired dither pattern. Your choices are 2x2, 3x3, 4x4, 5x5, 5box, 5plus, and
45rot_5x5 pattern rotated by 45 degrees. The offsets always are in the form of (δra,
δdec). The 5box pattern is the 2x2 pattern with the central pointing; 5plus is the 5box
pattern rotated by 45 degrees.
D_SCALE Additional scale factor for the offsets. The default of D_SCALE = 1 will add a border to
your images of 15 arcseconds, for a net increase of 30 arcseconds to the total field
of view of the final stacked image, for any of choice of DPATTERN.
D_RPTPOS Number of times to repeat each dither position.
D_RPTPAT Number of times to repeat the entire dither pattern.
STARTPOS Starting position in the dither pattern, where 0 is the first position of the pattern. This is
very useful if the system crashes or hangs mid-sequence, however do not forget to reset it
back to 0.
USENUDGE Nudge pointing center on pattern repeats; 0 = do not nudge, 1 = perform nudge.
NUDGESIZE Radial size in arcseconds of nudge, randomly chosen in one of the cardinal (ra, dec)
directions.
THROW Radial length in arcseconds to other nod beam (not functional in imaging mode).
THROW_PA PA of other beam for nodding (not functional in imaging mode).
After you have configured your dither sequence, run dither.source.kpno.pl to execute the dither pattern
and take images. Immediately after hitting return this script print out information about the requested dither
pattern, and it will ask you to type either HOME or CLEAR before beginning to execute the dither pattern.
If you have any offsets showing on the TCS, typing HOME will cause the script to dither about the pointing
center where the offsets are (0, 0), while typing CLEAR will absorb any offsets present into the current
FLAMINGOS@4-m, Ver. 2.34, 2006 Apr 04 Page 19 of 44