Dear all,
Thanks for your comments and suggestions. I just got a Pixinsight tutorial on processing M42 in order to not "blow up" the core. I will try to process again and see if it works. I will post it here as soons as I can.
Pixinsight is complex and is said that there is "a tough learning curve": so far, it seems true to me. Looks like there are 20 different ways to do the same thing in PI
))))). It may be computational demanding; once, I tried to run drizzle; it took so long to finish that I do not run drizzle anymore.
Regards, fernando