(*TEST* flat inverted) --- filter B, bin 2, night 210421, compared to previous night 210408, sigma = 0.0089 --- (flat / previous inverted)(*TEST* flat inverted) --- filter SI, bin 2, night 210421, compared to previous night 210408, sigma = 0.0097 --- (flat / previous inverted)(flat inverted) --- filter B, bin 2, night 210421(flat inverted) --- filter SG, bin 2, night 210419(flat inverted) --- filter SI, bin 2, night 210421(flat inverted) --- filter SR, bin 2, night 210407(flat inverted) --- filter V, bin 2, night 210417