NG6960 - Western Veil (Narrowband)

19:38 15/8/2007 UTC

Done! Had an opportunity to finnish this project with 2h30m SII data totalling 5h45m all filters combined. This is my first serious multinight imaging project with narrowband filters. I had my guidescope aligned and camera attached over the three clear nights (spanning almost a week from the 9th to the 15th, cloudy nights counted). I could target to the same field of view by just aiming the finderscope to the same guidestar. This image is composed according to CFHT (or Canada-France-Hawaii Telescope) palette, where H-alpha is mapped to Red, SII to green and OIII to blue. I've only used one quarter of the pixels from the camera. H-alpha and SII only cuts through the red filtered pixels, so everyting else is ignored because they are mostly noise.

NGC/IC Object List:
NGC6960 supernova remnant RA:20h45m42.0 Dec:+30°43m'00" BMag: 7.0, LBN 191 Veil Nebula
NGC6979 gaseous nebula RA:20h51m00.0 Dec:+32°09m'00" BMag: ,

Camera: Modified Canon EOS 350D | Telescope: Skywatcher ED80 Pro 80mm f7.5 refractor, William Optics 0.8x focal reducer | Mount: Orion Skyview Pro, Boxdoerfer PowerFlex MTS-3SLP drive controller | Filters: Astronomik H-alpha 13nm 2", Astronomik OIII 13nm 2", Astronomik SII 13nm 2" | Guiding: Orion ShortTube 80mm f5 refractor, QCGuider, Teleskop-Service 1.5x Barlow, Phillips ToUCam Pro II webcam | Exposure: Ha: 24x300s (2h) ISO800 f6, 6 darks, 9 flats; OIII: 15x300s (1h15m) ISO800 f6, 7 darks, 11 flats; SII 30x300s (2h30m) ISO800 f6, 4 darks, 8 flats. Ha:SII:OIII Mapping (CFHT Palette) | Software: IRIS, GIMP | Location: 60°31'N 26°52'E (Koivula/Kotka,FI) | Image Field: 2.313 x 1.736 degrees | Image Center: Ra 20h47m23s Dec +30°57'47" | Target altitude in the beginning of the exposure 55°