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)
19930018	47	Red Green Blue z 18.94 znorm 14.75 sky 14.3 14.1 14.4 S/N 18.9 27.9 32.1 S/N(c) 27.0 16.5 40.5 SN(E/C) 0.47
19930019	47	Red Green Blue z 18.96 znorm 14.78 sky 14.6 14.4 14.5 S/N 18.9 27.9 32.0 S/N(c) 27.1 16.7 41.2 SN(E/C) 0.45
19930020	47	Red Green Blue z 18.93 znorm 14.75 sky 14.3 14.4 14.4 S/N 18.5 27.5 31.6 S/N(c) 26.6 16.3 40.6 SN(E/C) 0.49
19930021	47	Red Green Blue z 18.94 znorm 14.76 sky 14.4 14.3 14.4 S/N 18.8 27.7 31.9 S/N(c) 26.5 16.4 40.6 SN(E/C) 0.48