Page 9 NGC 281

                       Astrophotography by Keith B. Quattrocchi

               NGC 281
               Pac Man Nebula in Cassiopia 
             Narrow Band Image


                                      Image Acquisition Information                      
                               Telescope:   16" RCOS Ritchey-Chretien Telescope (ion milled at f/9) 
                               Camera:       SBIG STL-6303
                               Guiding:       Astrodon  MOAG AOG (SBIG 237 with .65 FLR)
                               Filters:        Astrodon Ha, SII, OIII
                               Mount:        Software Bisque Paramount ME
                               Acquisition Programs:   The Sky,CCDAutopliot III, CCD Soft. 
                               Processing ProgramsCCDStack, Maxim DL, Photoshop
                               Date:: October 14-October 31, 2007                              
                               Time: 24x20 min ( 8 hours) each for Ha, SII, OIII: total 24 hrs                           
                               Processing:  CCD Stack and PhotoShop CS/2
Image Information:  The Pac Man Nebula is an emission nebula energized by a nearby open star cluser.  It primarily is an HII emitter.  The dark "Bok" nodules are believed to contain protostars.. 
Additional Comments:  Standard Narrow Band Image using Hubble Palette (SII, Ha, OIII). Color Image assembled in Maxim DL, overlay of Ha and Narrow Band and High Pass filer used in PS CS/2.  

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