hi guys,
recently I showed you my prelim. result on M27.
now I have some O3 in addtion to OSC and Ha.
what started last year in july, ended now...
when I still had my one shot color CCD (M25C) I collected some 3.8
hours of data in a night of not very good seeing last year..
in june and july 08 I acquired H-alpha and O3.
more than 12 hours total exposure time...phew - I think this gonna
become normal...
I think the image is deep in both, Ha and O3 now, and it is another
combination of different CCDs.
one shot and mono.
as for the sensitivity of CCD:
boy - that was a tremendous difference!
2.5 hours of O3 (2x2) showed much more data than 6 hours of Ha (2x2).
the SX H16 is very sensitive to green obviously, but way less
sensitive to red...unfortunately.
NP - it's just a matter of exp-time...*g*.
on the other hand - the 4021 chip is nice to handle, as it is qute
"calm"...
o.k. - end of speach - here we are with more than 12 hours tot. exp-time:
http://www.stargazer-observatory.com/M27-9.html
thanks for looking.
best regards,
Dietmar