I have same troubles with nebula coaddition

[oleg]

I have same troubles with nebula coaddition.
Look at the attached screenshot


Info about used data:
instrument - VLT@OmegaCam
object name - Messier 42
filter - R_SDSS
number of frames - 3

[oleg]

I have decided to do the tests using the part of the sky without nebula.

Info about used data:
instrument - VLT@OmegaCam
object centre coordinates - RA 09:52:43.0 DE +12:50:04.9
filter - R_SDSS
number of frames - 5

OMEGA.2011-04-19T00:57:04.565.fits
OMEGA.2011-04-19T00:58:18.406.fits
OMEGA.2011-04-19T01:01:02.638.fits
OMEGA.2011-04-19T01:02:46.378.fits
OMEGA.2011-04-21T00:15:22.051.fits

Hmmm...
I can't understand what the problem is
Look at the setting screenshots.

Why can't I get the stable results???

[oleg]

[oleg]

Look at the screenshots of the coadd.weight.fits from my 16 tests:

[oleg]

My test object

[oleg]

[oleg]

My new 16 tests.
I've changed the settings and got better results!

[oleg]

New settings

[oleg]