Used the 9 degree prism this morning to boost the resolution of my spectra. Much better result showing hydrogen emission lines (and a hint of Fe lines?). As Robin says, some drop off at the blue end from interstellar absorption.
Field of view 53 x 55 arc minutes with north and red up.
Yesterday I took a wider angle image to show the nova in context…just 3.5 degrees from the Crab Nebula.
Mike.
British Astronomical Association
Supporting amateur astronomers since 1890
