(*TEST* flat inverted) --- filter SG, bin 2, night 231021, compared to previous night 231019, sigma = 0.0075 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter V, bin 2, night 231021, compared to previous night 231019, sigma = 0.0085 --- (flat / previous inverted)
(flat inverted) --- filter B, bin 2, night 231019
(flat inverted) --- filter I, bin 2, night 231019
(flat inverted) --- filter R, bin 2, night 231019
(flat inverted) --- filter SG, bin 2, night 231021
(flat inverted) --- filter SI, bin 2, night 231019
(flat inverted) --- filter SR, bin 2, night 231019
(flat inverted) --- filter V, bin 2, night 231021