(*TEST* flat inverted) --- filter SG, bin 2, night 210406, compared to previous night 210330, sigma = 0.0205 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SR, bin 2, night 210406, compared to previous night 210330, sigma = 0.0147 --- (flat / previous inverted)
(flat inverted) --- filter B, bin 2, night 210317
(flat inverted) --- filter SG, bin 2, night 210406
(flat inverted) --- filter SI, bin 2, night 210317
(flat inverted) --- filter SR, bin 2, night 210330
(flat inverted) --- filter V, bin 2, night 210322