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)
19960018	94	Red Green Blue z 19.57 znorm 14.64 sky 14.4 14.2 14.4 S/N 25.9 36.1 42.6 S/N(c) 21.1 60.4 37.9 SN(E/C) 0.76
19960019	94	Red Green Blue z 19.55 znorm 14.61 sky 14.4 14.3 14.3 S/N 25.4 35.6 42.0 S/N(c) 20.8 60.9 51.4 SN(E/C) 0.71
19960020	94	Red Green Blue z 19.20 znorm 14.26 sky 14.4 14.4 14.3 S/N 21.6 30.3 35.7 S/N(c) 18.0 53.8 44.5 SN(E/C) 0.79
19960021	94	Red Green Blue z 19.23 znorm 14.29 sky 14.5 14.5 14.4 S/N 21.0 29.8 35.1 S/N(c) 18.1 54.4 44.8 SN(E/C) 0.81