Bizare image view after calibration with darks and flats

[Pieter Vuylsteke]

Hi Han,

After your suggestion that i should not debayer, I decided to try the calibration in astap itself.

When I look at an image in the photometry tab, this is what I see.
Is that normal ?

Kind Regards,
Pieter

[Pieter Vuylsteke]

(now gif attachment is present, sorry)

[Pieter Vuylsteke]

Some extra info : this was after I did calibrate + Align.
I started over from scratch and did only calibrate, then all seems fine.

(purpose is to do photometry on 600 files)

[han.k]

1) Calibrate in advance is fine. Better not to calibrate & align. That will most likely ruin the debayer pattern due to cropping. (I haven't checked that, something I will investigate)
2) Check, adjust the debayer setting RGGB or other in the tab stack method. This is required to extract the correct green pixels later. Best to check with a terrestrial image.

3) Then load the images in the photo tab. Press button extract green. New files will be listed after some time.
4) Refresh astrometrical solution or >| button.
5) If cycle is completed, select the Var and Check Star and star 3. If you click a second time on a star the three star will be swapped.
6) Press >| button again and magnitudes will be recorded. (Use V17 database. See tab alignment.)

Will rewrite the instruction today or tomorrow.

[han.k]

Yes calibrate only for photometry . I will add a warning in the code:

█ █ █ █ █ █ Warning, alignment (shifting, rotating) will ruin Bayer pattern!! Select calibrate only for photometry or checkmark "Convert OSC images to colour" █ █ █ █ █ █'

[han.k]

Here a first guideline for DSLR camera users:

http://www.hnsky.org/astap.htm#dslr_photometry

Han