WBPP 2.4.5

[wboeck]

I recently updated Pixinsight. It included a newer version 2.4.5 of WBPP. I have tried to process several photos of M51 and the Fireworks Galaxy. I am getting strange results and cannot figure out what is happening. When the script is running, I get a lot of warnings about the metadata does not include noise data so it needs to use the raw data. The final master light image has a white background with spots. I did not have this issue with earlier versions of the WBPP. I am sure that I have something set up incorrectIy. I have attached screenshots showing the results and settings.



thanks,

Wayne

 

[wboeck]

Here is what one sub looks like.

 

[pfile]

this looks like darks not matching the lights in some way. if this is a cmos camera it's important that all these things are true:

• the gain and offset of the lights match the darks and bias
• lights, darks and bias were all taken with the same kind of driver (ascom vs. integrated) and with the same capture software
• the version of the capture software is the same between lights, darks and bias
• the duration of the darks matches the duration of the lights, if your camera exhibits amp glow.

these things should also be true of the flats and the flat darks.

rob

 

[wboeck]

I noticed that the BIAS offset frames were different than the rest so I just took a new set. The offset was the same for the darks, flats and lights. All of the frames were taken with the same version of SGP along with the same ASCOM drivers. I ran WBPP and ended up with the same results as before. I attached the fits header for the BIAS, Flats, Darks and Lights.

 

[pfile]

can you upload one bias, one dark and one light to a file hoster like google drive and post the link here?

 

[robyx]

One more point to be noticed, since by looking at the master light result, the background looks completely cut off:

- ensure that the median value of the master dark is lower than the median value of a light frame, if not then, disregarding the FITS hedaer data, it means that there was light infiltration or something different was set in the camera configuration (like the pedestal value in the drivers settings which is not reported in the FITS header)
- ensure you set a proper value of the output pedestal
- VERY important, the camera model cannot be seen (it's reported as a generic ASI), with some CMOS cameras (like the 294) you should never shoot too short frames (under 1 second or similar, depending on the model) since the electronic switches working mode and so the data is uncorrelated with longer frames. In that case, keep your flats above a couple of seconds.

 

[wboeck]

can you upload one bias, one dark and one light to a file hoster like google drive and post the link here?

Here is a link to the files using Dropbox. I hope it works. I have never shared files this way.
Go to folder

Wayne

 

[pfile]

can you set the link to "public"? it wants me to sign in to download the files.

thanks

rob

 

[wboeck]

can you set the link to "public"? it wants me to sign in to download the files.

thanks

rob

Dropbox stopped allowing public links. Must be for security. Here are Google Drive links. Hope they work.

https://drive.google.com/file/d/1SDRrD_Mw573EbMI-l6Ms386fWiDspALj/view?usp=sharing, https://drive.google.com/file/d/1XqXY0lRkGXWLRN6SnVabEAZAi0lLB8rV/view?usp=sharing, https://drive.google.com/file/d/1YOmFpJvqag07ASMuStXN7a87zoWw1Y73/view?usp=sharing, https://drive.google.com/file/d/1oS8hppdeR93fPUaaESkGVUgqztS2Gypa/view?usp=sharing, https://drive.google.com/file/d/1vUSIrEs4dRYOQ6Qj8RvjrbUazrLS7b3K/view?usp=sharing

 

[wboeck]

Here is a link to the WBPP log.

20220808185715.log

drive.google.com

 

[wboeck]

One more point to be noticed, since by looking at the master light result, the background looks completely cut off:

- ensure that the median value of the master dark is lower than the median value of a light frame, if not then, disregarding the FITS hedaer data, it means that there was light infiltration or something different was set in the camera configuration (like the pedestal value in the drivers settings which is not reported in the FITS header)
- ensure you set a proper value of the output pedestal
- VERY important, the camera model cannot be seen (it's reported as a generic ASI), with some CMOS cameras (like the 294) you should never shoot too short frames (under 1 second or similar, depending on the model) since the electronic switches working mode and so the data is uncorrelated with longer frames. In that case, keep your flats above a couple of seconds.

I changed the Pedestal Output to automatic instead of 0 and it works better. I will look at the flats and adjust those as well. I recently changed the camera gain in SGP and this was the first time processing so that must have caused the problem.

Thanks