Astrophotography by Keith B. Quattrocchi

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

 
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 Programs: CCDStack, 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.