halo221+84

Number of visits: 6

cohort types: med, short

Priority Levels (in descending order):
'anc': ancillary targets
'sqo2': W+D giants as selected using Nidever giant selection criteria
    and J-K_raw > 0.3.
'sqo3': low S/N W+D giants as selected using Nidever selection criteria,
     J-K_raw > 0.3, these stars use the H magnitude cuts for long targets
    (12.8 < H_raw < 13.3).
'sqo6': stars with no W+D data and J-K_raw > 0.3.
'sqo4': W+D dwarfs as selected using Nidever giant selection criteria and
     J-K_raw > 0.5.
'sqo5': W+D dwarfs as selected using Nidever giant selection criteria and
     0.3 < J-K_raw < 0.5.

Fiber Distribution (see notes):
M1 97
S1 157
S2 157

Notes: 

IMPORTANT: The giant/dwarf/no W+D photometry selection was incorrect.  We
thought that the giant flag in the SQO files corresponded to -1=dwarf, 0=no W+D,
1=giant but the in reality -1=no W+D, 0=dwarf, 1=giant.  The targets selected in
sqo4 and sqo5 were intended to be stars without W+D photometry are they actually
dwarfs.  The reverse situation occurred with the targets selected in sqo6 (we
wanted to choose dwarfs but got stars without W+D photometry).  Note that the
legend in the CMD is also incorrectly labeled (it reflects the intended
selection criteria, not the acutal selection criteria).


No high resolution, proper motion, or radial velocity targets were targets were
provided.  No dwarfs needed to be selected.

The open cluster Melotte 111 (Coma star cluster in Coma Berenices at d = 96 pc)
is in the field, so dwarfs (sqo6) are prioritized over stars without W+D
photometry (sqo4 and sqo5).

Increased the maximum number of fibers selected to 254 stars (instead of the
normal 250) because 4 ancillary targets collided with halo stars.

The data from the SQO file was scrambled in RA (this only affects the selection
of stars from the lowest priority class, blue no W+D stars).  Unfortunately, the
code does not use a known random seed, so the selection must be reconstructed
from the target list.

Used uncorrected colors for color cut on SQO targets.

Used fiber jacket diameter of 70", which is too small to avoid all fiber
collisions (need 71.5").

Revision gc_target_halo221+84.py used to select target list: 127846