PRE PROCESSING IN PI VERSUS BPP OR DSS IS FAILING WITH USE OF ASTRONOMIK CLS

[bulrichl]

Please also upload the MasterDark, thanks.

[ballyhoo]

uhoh, I forgot the master dark.

https://www.dropbox.com/s/dn2qret5bdf5220/MASTER%20DARK%20120%20integration.fit?dl=0

and master bias
https://www.dropbox.com/s/jeipedibqbvhq07/MASTER%20BIAS%20120%20integration.fit?dl=0

[ballyhoo]

you will see the amp glow.


EDIT,

HERE IS A SINGLE DARK.

https://www.dropbox.com/s/mvqhjq0jm75ns64/3%20min%20dark%20120_008.fit?dl=0

[bulrichl]

Congratulations. Your light frames calibrated nicely with your MasterDark and MasterFlat without the strange artifact.

Only the lower right edge is somewhat dark and the lower left edge a little bit brighter than the rest of the image (presumably the flats can be optimized).

I don't know how you calibrate - I used these settings:

- Section 'Master Bias' disabled

- Section 'Master Dark' enabled
MasterDark selected, both 'Calibrate' and 'Optimize' disabled

- Section 'Master Flat' enabled
MasterFlat selected, 'Calibrate' disabled

Calibrated Light frame 2 after debayering is appended as screen section. Good luck!



Bernd

[acmalko]

Same thing !
Unable to reproduce error

Good job bulrichl

[ballyhoo]

Hmm, I wonder whether there was just some incidental drop-down I did or something

Thank you!

[ballyhoo]

I got the same artifact again from last night's integration.   


ABE seems to get artifact removed.

[pfile]

one thing i would do to make your life easier is to put a slightly pink t-shirt over the telescope when taking flats. that will balance the flat histogram a little better. it's not mandatory but will make sure the SNR of your flat's red channel is on par with the SNR of the other channels. of course when you do this you will have to increase your flat exposure and the method will likely not work with twilight flats unless you take some seriously long flats.

rob

[bulrichl]

Sorry, I really don't know what you are doing. I see a completely red image of the NAN. I hope you disabled 'Link channels' when using STF Auto Stretch?

For the image of the Swan nebula I started with the 3 calibrated images, see reply #33. These were debayered (RGGB, VNG), aligned (default settings, image 002 as reference) and integrated. Everything went well, no problems. The resulting integration is appended as screen section.

So you will have to follow that workflow and check each image, the calibrated, the debayered, the aligned ones and finally the integration and observe, in which step of the procedure the artifact appears. This is not a very complex task. I fear that I cannot help you further. Good luck.

Bernd