(*TEST* flat inverted) --- filter B, bin 2, night 210609, compared to previous night 210428, sigma = 0.0158 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 210609, compared to previous night 210428, sigma = 0.0208 --- (flat / previous inverted)
(flat inverted) --- filter B, bin 2, night 210609
(flat inverted) --- filter SG, bin 2, night 210602
(flat inverted) --- filter SI, bin 2, night 210609
(flat inverted) --- filter SR, bin 2, night 210602
(flat inverted) --- filter V, bin 2, night 210501