Frequently Asked Questions (about the FITS archive) . HyperLeda home | Documentation | ... Some variations in the setup are accepted in a given dataset depending on the context: In broad Band Imaging, the observations taken through different filters (U B V R and I) belong to the same dataset. ... What data are archived in the HFA? The HFA stores files as they are provided, ie., it can be raw observation files or pre-reduced files (flatfielded and wavelength calibrated). ... HyperLeda . ...