Narrowband Imaging

Date: April 3, 2008

Telescope: Celestron 8 XLT f/2 on CGE mount

Camera: Starlight Xpress SXV-H9C

Exposure: 12 5-min subframes (60 min total) each Ha and OIII guided with Meade DSI pro and piggybacked Meade DSX-90 at f/13.8 using PHD Guiding.

Comments: HyperStar 3 lens, Astronomik 13nm Hydrogen alpha filter. Only red channel of the H9C camera used. Astronomik 13nm Oxygen III filter. Only green channel of the H9C camera used. Camera inadvertently rotated between Ha and OIII exposures so corners cut on alignment of the images.