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FORS1 IMG: ZERO POINTS (long term trending)

Postscript version available here
zero points of photometric nights
2006-09-03 to 2006-12-03
Filter avg. zero point range frames
U25.12 +/- 0.08 24.94 ... 25.2514
B27.71 +/- 0.04 27.66 ... 27.7713
V28.01 +/- 0.02 27.98 ... 28.0412
R27.91 +/- 0.03 27.86 ... 27.9813
I27.07 +/- 0.03 27.02 ... 27.1313

avg. zero point average of the zero points per frame of all photometric nights, weighted by their inverse error
range range of zero points observed in the photometric nights
frames Total number of frames in photometric nights

For daily FORS1 health check, focus on:

boxes per standard filter (UBVRI_BESSELL): The DFO generated zeropoints (black) come per frame, with errorbars. Blue are the values generated by the quick-look pipeline on Paranal, one value per pointing. There may be several entries per night.

Values are generated for 4port, 1x1 binning and standard resolution collimator only. Blue dots are latest values from PSO; others come from regular processing by QC Garching.