observational techniques used

URI: https://gptkb.org/prop/observational_techniques_used
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gptkb:supernova_SN_1901_B photometry and spectroscopy
gptkb:comet_81_P/_Schwassmann-Wachmann_52 various observational techniques used
gptkb:LMC_4 photometry and spectroscopy
gptkb:comet_50_P/_Schwassmann-Wachmann_21 CCD imaging.