(*TEST* flat inverted) --- filter Halpha, bin 2, night 211015
(*TEST* flat inverted) --- filter SG, bin 2, night 211015, compared to previous night 211014, sigma = 0.0065 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SI, bin 2, night 211015, compared to previous night 211014, sigma = 0.0054 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SR, bin 2, night 211015, compared to previous night 211014, sigma = 0.0048 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SU, bin 2, night 211015, compared to previous night 211014, sigma = 0.0071 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter SZ, bin 2, night 211015, compared to previous night 211014, sigma = 0.0064 --- (flat / previous inverted)