Left plots: red are targets, blue are telluric. Observed mags are calculated from median value of green chip. Zeropoint gives overall throughput: bigger number is more throughput.
First spatial plots: circles are objects, squares are tellurics, crosses are sky fibers. Colors give deviation of observed mag from expected 2MASS mag using the median zeropoint; red is brighter
Second spatial plots: circles are sky fibers. Colors give sky line brightness relative to plate median sky line brightness

Frame

Nreads

Zeropoints

Mag plots

Spatial mag deviation

Spatial sky 16325A emission deviations (filled: sky, open: star)

Spatial sky continuum emission

Spatial sky telluric CO2 absorption deviations (filled: H < 10)

18830078

	Red	Green	Blue
z		19.95
znorm		15.02
sky	14.8	14.4	14.5
S/N	26.1	37.3	44.0
S/N(c)	49.3	43.6	30.8
SN(E/C) 0.28

18830079

	Red	Green	Blue
z		19.90
znorm		14.97
sky	14.8	14.5	14.5
S/N	25.7	36.7	43.0
S/N(c)	48.4	42.8	30.1
SN(E/C) 0.30