2023-04-14

AB magnitudes from ESA Gaia

I got frustrated by this ESA Gaia documentation today. People: If you put something in a table, name it in the table the same way you name it in the equations in your paper! And if you explain completely two magnitude systems, then make note of which one you used in the catalog. Anyway, I finally figured out how to convert ESA Gaia magnitudes to and from calibrated flux densities (and therefore AB magnitudes) after re-reading the documentation a few times. This is for my quasar homogeneity projects with Abby Williams (NYU) and Kate Storey-Fisher (NYU).

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