Troubleshooting guide

These may be done in the afternoon.
The following list of commands is used for long slit and MOS plate spectroscopy:
On the flamingos command line:
config.exposure.pl Setup the filename and exposure time.
config.filter.grism.decker.wheels.pl Use to insert filter and grism and appropriate baffle.
config.mos.wheel.pl Use to insert long slit or MOS plate.
config.mos.dither.kp4m.pl Setup the spectroscopy ABBA parameters.
dither.mos.kp4m.pl Take the spectrosopy ABBA data.
set.bias.pl Use to change bias for imaging or spectroscopy.
tweak.decker.pl <delta_angle> Allows adjustments to the Decker wheel position.
tweak.mos.pl <delta_angle> Allows adjustments to the MOS wheel position.
At the iraf cl prompt:
imexam Measure slit profiles and stellar centers (keys: a, x, g, i).
xbox Use to align a MOSplate (keys: q, f, g).
B. Long slit Alignment
1. Set instrument PA before acquiring target.
This must be done first, as the telescope must be at zenith in order to move the rotator.
For safety reasons, have the telescope operator make the rotation from the Cassegrain Cage.
Run config.mos.dither.kp4m.pl, and set the parameter ROT_PA to the new value, so the WCS
compass arrows will display correctly in ds9.
2. Have telescope operator verify pointing on the North Port TV Camera.
Use an SAO star or a Fixed Bright Star near to target field.
There should be a grease pencil mark on the TV monitor indicating where to zero the telescope
pointing.
Take a quick image (2-5 seconds) on FLAMINGOS, and make certain the SAO star is well centered
on the array. If is not, center the star with relative.offset.kpno.pl, then take another image.
Once it is well centered, Z the telescope (cf. § III Nightly Startup Tasks: B. Startup on the sky).
3. Acquire target on FLAMINGOS in K
s
filter.
If necessary, adjust telescope pointing with relative.offset.kpno.pl until target is positioned
close to the center of the array.
4. Have the telescope operator adjust focus.
The guide camera should be confocal with FLAMINGOS and should give a good starting focus.
Next, take a series of images over a range that covers best focus, offsetting the telescope between each
image; use relative.offset.kpno.pl and dither back and forth by 10 – 20 arcseconds. Run
fwscan on the stack of images to determine the best focus setting (cf. III. Nightly Startup Tasks, §B
Startup on the Sky).
Don't spend very long on this, as the focus will change.
Record the middle dome temperature, for reference.
5. Have the telescope operator acquire a guide star, and begin guiding.
Verify that the guide probe radius is greater than 100 mm, in order to avoid vignetting.
6. Take another image with FLAMINGOS, and measure the target's centroid. Use imexam, key a.
7. Insert decker long-slit baffle using config.filter.grism.decker.wheels.pl.
8. Verify decker long-slit is straight along the chip (small dx for a large dy).
FLAMINGOS@4-m, Ver. 2.34, 2006 Apr 04 Page 23 of 44