astro m4 & ngc6144 re-done

13x120 seconds
Intes MK-69 (6" f/6 Mak-Cass 900mm fl)
Celestron CI-700 Mount w/Gemini
QHY8
reduced 50%
diffraction spike from Antares on left edge of image
reprocessed with better flats and darks
What I thought was an unwanted gradient on the left side of the image is
actually part of the Antares Nebula, vdB 107.
--
John N. Gretchen III
N5JNG NCS304
http://www.tisd.net/~jng3

John N. Gretchen III wrote:

13x120 seconds
Intes MK-69 (6" f/6 Mak-Cass 900mm fl)
Celestron CI-700 Mount w/Gemini
QHY8
reduced 50%
diffraction spike from Antares on left edge of image
reprocessed with better flats and darks
What I thought was an unwanted gradient on the left side of the image is
actually part of the Antares Nebula, vdB 107.

------------------------------------------------------------------------

Much improved. I've learned to check the field with the POSS plates and
Google Images to see if I have a gradient or something real. Before I
did that I managed to completely remove a faint nebula thinking it a
gradient.

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".