page44M81


































                      Astrophotography by Keith B. Quattrocchi
















                           M81
               Spiral Galaxy in Ursa Major
              LRBG
         
                   
                        Copyright 2013
                      Keith B Quattrocchi

M81size2.jpg




                                      Image Acquisition Information                      
                               Telescope:   16" RCOS Richey Chretien Telescope (ion milled at 6/9) 
                               Camera:       SBIG STL-11000
                               Guiding:       SBIG 402
                               Filters:        Astrodon Ha and Astrodon RBG Filters
                               Mount:        Software Bisque Paramount ME
                               Acquisition Programs:   The Sky,CCDAutopliot IV, CCD Soft. 
                               Processing ProgramsCCDStack, Maxim DL, Photoshop
                               Date: Data processed August 15, 2013.  Data aquisition: June 3, 2013-                               June 30, 2013                              
                               Time: 12 x30 min ( 6 hours) each for each of L, R, G, B:
                               Total of  24 hours imaging time.                              
                               Processing:  CCD Stack and PhotoShop CS/3
Image Infornmation:  M81 is a spiral galaxy in the constelation Ursa Major. 
Processing Infornmation  This LRGB-Ha image was obtained using  AstroDon LRGB filters.  This image was a standard LRGB construct performed in CCDStack.  Further stretching, high pass filtering and background smoothing was performed with Adobe Photoshop CS/4.  All data stretching was by minimal stretching with gamma and DDP in CCD Stack and then further stretching with curves/levels in photoshop.   

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