The latest incarnation of “The Beast”

4 Responses to The latest incarnation of “The Beast”

1. Robin says:

   May 10, 2015 at 1:45 pm

   Hi Greg, good to visit your site as always.

   I’m interested to discover that your three Sky-90s are all carrying OSC cameras. Having not paid close enough attention before, I think I always assumed they were R,G and B. How does one go about stacking/integrating subframes from three different cameras and scopes doing the same job? Do you create master subs off each scope that you then re-stack?
2. Greg Parker says:

   May 10, 2015 at 2:32 pm

   Hi Robin – I have a master set of bias and flats for each scope at the imaging temperature. I then calibrate each set (scope 1, scope 2, scope 3) using the appropriate set of bias and flats. All the calibrated subs are then colour converted (in one go). Finally all the subs are stacked as a single set in Maxim DL. Since the 3 scopes aren’t exactly aligned, there is a built-in dither so in principle I don’t really need to dither the subs to get rid of hot pixels – but in practice, I do anyway.
3. Geoff Ruzgar says:

   June 13, 2015 at 9:21 pm

   Hi Greg
   I read your fascinating article in Astronomy Now Feb 2015 and came over to your site to see some of your wonderful work. In our group we have many international observers and astroimagers some of them probably well known to you. I was wondering if you would allow me to post a link to here so they can see the mini wasp array for themselves.
   Anyway keep up the good work.
   best regards
   Geoff Ruzgar
4. Greg Parker says:

   June 14, 2015 at 8:33 am

   Of course Geoff – please go ahead.
   Greg