Troubleshooting guide

Appendix 3: XBOX Default Parameter List for Instrument at PA = 90 degrees
PACKAGE = ucsclris
TASK = xbox
image = target.0001 image
input = box1 input file (box locations)
(stars = ) file of star centroids, using 'a' key in imexam
(nxbox = 50 ) nx of extraction box
(nybox = 50 ) ny of extraction box
(xsz = 30. ) x box length (pixels @ .15mm/pix)
(ysz = 30. ) y box height (pixels @ .15mm/pix)
(fwhm = 4. ) star FWHM in x (pixels @ .21''/pix)
tel = 4m Telescope - 2m,4m,MMT or GemS
(rotdir = -1 ) Enter rotator direction (1,-1)
rot_2m = 90. Enter 2m rotation offset
xrot_2m = 1162. Enter 2m center of rotation x
yrot_2m = -1868. Enter 2m center of rotation y
invert2m = no Enter if 2m field is flipped (yes/no)
rot_4m = -90. Enter 4m rotation offset
xrot_4m = 1162. Enter 4m center of rotation x
yrot_4m = -1868. Enter 4m center of rotation y
invert4m = yes Enter if 4m field is flipped (yes/no)
MMT_rot = 90. Enter MMT rotation offset
MMT_xrot = 1024. Enter MMT center of rotation x
MMT_yrot = 1000. Enter MMT center of rotation y
MMT_inve = yes Enter if MMT field is flipped (yes/no)
GemS_rot = 0. Enter Gemini South rotation offset
GemS_xro = 1009. Enter Gemini South center of rotation x
GemS_yro = 989. Enter Gemini South center of rotation y
GemS_inv = no Enter if Gemini South field is flipped (yes/no)
(xoff = 0. ) add'n. x shift to apply (pix)
(yoff = 0. ) add'n. y shift to apply (pix)
(def_ref = 0.2 ) default error estimate
(def_err = 0.2 ) default error estimate
(niter = 6 ) number of iterations in fit
(box_siz = 0.5 ) box half-len (usually acceptable resid)
new_x_fw = 4. [Enter new x FWHM]
new_y_fw = 4. [Enter new y FWHM]
vmag = 100. [magnification factor]
wt = 1. [weight]
(coord = ) graphics cursor input
(mode = ql )
NOTE: To change to position angles other than 90 degrees, it is necessary to change only rot_4m, not
rotdir or invert4m. The invert4m keyword describes the predefined reference field with respect to the real time
telescope image and should not be changed. After changing the rotator in the cage, run
config.mos.dither.kp4m.pl to enter the new rotation angle before running xbox.
FLAMINGOS@4-m, Ver. 2.39, 2013 April 23 Page 45 of 47