NGC7331 and Deer Lick Group Galaxies
Date: 15 Nov night, 2003
Telescope: Celestron 8” SCT with stabilized mirror, on Gemini G-41 mount
Guiding: ST-4 Autoguider with Celestron C80, 80mm F11 refractor piggybacked on C8.
Camera: Genesis KAF1602E with IDAS LPS filter and Astronomik L filter (UV/IR blocking, useless in this case)
Location: Tai Mei Tuk, Hong Kong
Exposure: 19 x 10mins
Software: Image acquisition by MaximDL, calibration and auto-alignment by AIP4win, sigma-combined by Sigma, background smoothed by AIP4win, and final brightness adjustment by Astroart