Comment My star photometry memories from the past (Score 1) 13
I did multi-channel photometry of variable stars as an astrophysics student in early 1990s. We did not lead the scientific work, this was for actual scientists.
The measurements are time-consuming and tedious. You sit in an observatory and follow a protocol. Guide the telescope to a comparison star, guide it to the actual star to be measured, back and forth, for hours and hours, for nights and nights. The photometer takes the measurements, prints the graphs to long rolls of paper, that you will later measure by hand. The dome of the observatory was cold, often -10C and below (space around the telescope was kept to overall outdoor temperature), guiding the scope was fully manual work, you got to stay up all nights with no internet yet or social media to scroll. Perfect job for the students
The results were exactly what this article is about. Long time series (many years) of variable star brightness graphs in multiple channels, used to figure out the physics behind the brighness changes. Is this a cepheid where the star itself is pulsating? A rotating pair of stars? Something that we do not yet know and is new to science?
Nobody guessed or hoped that we might be able to detect actual planets at that time.