AMATEUR ASTRONOMY SITE
Javier Gómez Laina                                                                                  M31  - The Great Andromeda Galaxy -

                                              push here for full resolution (3100x2500 - 635 Kb)


Object  M31,   The Great Andromeda Galaxy, and its satellite galaxies, M32 & ngc205.
Telescope Celestron C-8 203mm  f3.0     TeleVue 76 guide telescope & QuickCam.
CCD  Starlight MX716 CCD camera. 
MOSAIC  28 frames           ( 7 width  x  4 height )
Exposures
 (each frame)
L
R
G
B
32'  unfiltered  (32 x 60")     --     --     -- 
Date
5  -  15   Nov   2004
Processing Flats, Darks & Bias calibration and aligning  in AIPWin. 
Combining in Ray Gralak's Sigma-Clip. 
Deconvolution in AstroArt with Robert Vanderbei's  plug-in. 
Mosaic combining in Maxim DL. 
PhotoShop: Gradients removing.  Jerry Lodriguss' Layer Mask method for avoiding sobre-exposure on Galaxy's core.  Curves and slight unsharp mask. 
Noise processing in Pleiades Astrophoto's  PixInsight LE.