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)
19990016	47	Red Green Blue z 19.08 znorm 14.90 sky 13.9 13.8 13.7 S/N 15.5 24.4 29.0 S/N(c) 21.6 21.7 14.2 SN(E/C) 0.86
19990017	47	Red Green Blue z 19.07 znorm 14.89 sky 13.9 13.9 13.8 S/N 15.4 24.1 28.5 S/N(c) 21.2 21.3 13.9 SN(E/C) 0.87
19990018	47	Red Green Blue z 19.09 znorm 14.91 sky 13.9 13.9 13.9 S/N 15.6 24.4 29.1 S/N(c) 21.5 21.6 14.3 SN(E/C) 0.84
19990019	47	Red Green Blue z 19.06 znorm 14.88 sky 14.2 14.0 13.9 S/N 15.3 24.2 28.3 S/N(c) 21.1 21.5 14.1 SN(E/C) 0.86