(*TEST* flat inverted) --- filter Clear, bin 1, night 230109, compared to previous night 230106, sigma = 0.0023 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter HA, bin 1, night 230109, compared to previous night 230106, sigma = 0.0023 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter R, bin 1, night 230109, compared to previous night 230106, sigma = 0.0026 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter V, bin 1, night 230109, compared to previous night 230106, sigma = 0.0025 --- (flat / previous inverted)