(*TEST* flat inverted) --- filter B, bin 1, night 230618, compared to previous night 230617, sigma = 0.0270 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter I, bin 1, night 230618, compared to previous night 230617, sigma = 0.0038 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter R, bin 1, night 230618, compared to previous night 230617, sigma = 0.0418 --- (flat / previous inverted)
(*TEST* flat inverted) --- filter V, bin 1, night 230618, compared to previous night 230617, sigma = 0.0329 --- (flat / previous inverted)