(*TEST* flat inverted) --- filter V, bin 2, night 211106, compared to previous night 211105, sigma = 0.0052 --- (flat / previous inverted)
(flat inverted) --- filter B, bin 2, night 211103
(flat inverted) --- filter SG, bin 2, night 211103
(flat inverted) --- filter SI, bin 2, night 211104
(flat inverted) --- filter SR, bin 2, night 211105
(flat inverted) --- filter V, bin 2, night 211105