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)
18820046	94	Red Green Blue z 19.89 znorm 14.96 sky 15.5 14.9 14.6 S/N 29.1 38.6 46.6 S/N(c) 25.3 46.4 28.6 SN(E/C) 0.80
18820047	94	Red Green Blue z 19.86 znorm 14.93 sky 15.5 15.2 15.0 S/N 28.3 38.3 45.8 S/N(c) 25.1 46.2 29.2 SN(E/C) 0.83
18820048	94	Red Green Blue z 19.85 znorm 14.92 sky 15.7 15.4 15.2 S/N 28.1 38.5 45.6 S/N(c) 25.2 46.8 28.1 SN(E/C) 0.87
18820049	94	Red Green Blue z 19.95 znorm 15.02 sky 15.8 15.3 15.2 S/N 29.6 40.7 47.7 S/N(c) 27.0 46.5 28.2 SN(E/C) 0.87