转过来:
Technical Details Optics: 14" f/10 RCOS Ritchey-Chrétien Cassegrain. Mount: Astro-Physics AP1200GTO. Camera: STL-11000XM. Filters: Custom Scientific 5nm S-II, H-alpha, O-III. Dates/Times: 19, 27 January 2004. Location: my backyard observatory in Austin, Texas. Exposure Details: S-II: 2 hours.H-alpha: 3.5 hours.O-III: 2 hours. Processing: To generate the color, the three emission-line images were first histogram-normalized, so that they each covered the same total range of brightness. These were then combined into an RGB image, and finally the H-alpha data was used for the luminance (brightness data). |