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1
well by OK, i mean that the colors seem somewhere in the ballpark (galaxies are white/tan, stars don't look insane), there's no vignetting or dust bunnies (if the flats are upside-down and you have dust, you'll definitely see that.).

anyway the right thing to do is just redo all the calibration frames in SGP; i consider trying to fix the calibration frames kind of a hack (but fun to try)

i processed the image you posted and the colors seem correct. the gradient is removable with DBE. i'm also seeing some  'typical' OSC + refracting optics problems - the blue channel is not well-focused while the red and green seem OK. or, the blue channel might just be suffering from "blue bloat" which i guess is normally taken care of with a UV filter.

rob
2
OK, so this is interesting. I created some new darks, although they are only 300 seconds, not 600 like the lights. Here's the result of a BPP with the new darks and the mirrored flats. I'm a bit surprised at the amount of amp glow, but when I just do a straight STF (click the button in the toolbar), the result is actually not terrible, although there seems to be a serious gradient. Not sure how I'd go about fixing it. https://drive.google.com/open?id=1VHBdPMUqyLMmcfA6mqKcpRoQroub7har
3
Well, what makes the data “ok”? We don’t know if it’s flipped or whatever, at this point, do we? There’s no screen door effect in the flats of course, but maybe I don’t know what makes them good or bad. I thought it was just the orientation that was the problem.
4
well the flats were weak in one channel and that can definitely produce a color cast, but it doesnt matter - you need to do color calibration (or at least view with STF channels unlocked) to see if the data is OK.

rob
5
Well, I think I have somehow rendered my flats completely useless now. After mirroring them vertically and running BPP, the resulting finished product looks very blue. The c_d_r files look good if I run it without the flats though.
6
format explorer > double click fits > untick "thumbnail image" in 'override embedding settings' section, click OK.

rob
7
Well, I did a vertical mirror based on the advice above, but for some reason when I save the file and re-open it, there's a new file with an _thumbnail suffix appended. When I tried running BPP with the newly saved files, it blew up, I believe because of the thumbnails, which incidentally don't show up as separate files.
I got this:

Calibrating target frame 1 of 28
[2018-08-21 21:31:30] Loading target frame:
[2018-08-21 21:31:30] /Volumes/Astronomy Pix/Pictures/Astronomy/ZWO_Flats/Flats-0001 copy.fit
[2018-08-21 21:31:30] * Subimage 1 of 2
[2018-08-21 21:31:30] Reading FITS image: 16-bit integers, 1 channel(s), 5496x3672 pixels: done
[2018-08-21 21:31:31] 46 FITS keywords extracted.
[2018-08-21 21:31:31] * Subimage 2 of 2
[2018-08-21 21:31:31] Reading FITS image: 8-bit integers, 1 channel(s), 400x267 pixels: done
[2018-08-21 21:31:31] *** Error: Incompatible image geometry


8
Bug Reports / Re: 'Unknown exception' : CometAlignment refuses to "Add files"
« Last post by pfile on 2018 August 21 21:17:45 »
what happens if you select only one file? is there a # of files beyond which this happens?

rob
9
Bug Reports / 'Unknown exception' : CometAlignment refuses to "Add files"
« Last post by fkieffer on 2018 August 21 20:06:31 »
Hi,

so I just finished preprocessing some pictures of 21p Giacobini Zinner, everything works fine (on Macbook Pro, PI version 1.8.5.1352), until i ask for some "CometAlignment"

I can't add files : when i'm prompted to select the files, i get an "unknown exception" error message, and I don't know what's causing this !!
Console says :
Code: [Select]
Loading image: w=3906 h=2602 n=3 RGB Float32
63 FITS keyword(s) extracted.

So to be clear, here's how it comes :
clicking on "Add files" -> selecting the files -> clicking "ok" -> console output (see above) -> immediate error message ->  :'( :'(

I can actually select a list of files with any other process, only CometAlignment is causing trouble...
I tried
- rebooting
- reinstalling
- starting PI from another session (user)
- changing the file format, reverting to fit instead of xisf

Nothing seems to have any effect. Ideas ? Thanks for reading (and thanks+++++ for answering  ^-^)
10
General / Re: Splotchy background after Batch Preprocessing and DBE or ABE
« Last post by pfile on 2018 August 21 18:39:48 »
you should be able to tell what transform you need for sure by loading one of your lights with the fits reader set to up-bottom and then loading the same light set to bottom-up and see what transform you need to make them match.

but dont forget to set the reader back to whatever it was set to when you are done!

rob
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