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)
18540062	47	Red Green Blue z 18.77 znorm 14.59 sky 14.4 14.1 14.1 S/N 14.1 22.3 25.9 S/N(c) 23.0 39.6 8.3 SN(E/C) 0.50
18540063	47	Red Green Blue z 18.85 znorm 14.67 sky 14.6 14.3 14.1 S/N 14.7 23.0 26.7 S/N(c) 23.9 40.6 8.6 SN(E/C) 0.46