(*TEST* flat inverted) --- filter I, bin 1, night 210506, compared to previous night 210505, sigma = 0.0045 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SU, bin 1, night 210506, compared to previous night 210505, sigma = 0.0050 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter Y, bin 1, night 210506, compared to previous night 210505, sigma = 0.0053 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter ZS, bin 1, night 210506, compared to previous night 210505, sigma = 0.0045 --- (flat / previous inverted)