Howdy, Stranger!
It looks like you're new here. If you want to get involved, click one of these buttons!
BlockHead
About
- Username
- BlockHead
- Joined
- Visits
- 257
- Last Active
- Roles
- Member, Administrator
Comments
-
M109 in particular is not a very contrasty galaxy in color... so look for any subtle color bits to bring out.-the Blockhead
-
I wouldn't worry about the scatter too much. The fit that I show isn't terrible (or unusual). There is some solid clumping there! And again, as I first mentioned, even with so few stars..the and was not that bad right? That should really give you s…
-
Craig, I am going to guess you have not installed the local GAIA DR3 and both APASS databases?We are getting different results. Although the scatter is still there...it appears the fit is more determined and believable. Note the weight coefficients …
-
I see... yes, M109 is a particularly star poor field. And 600 second exposures is definitely healthy! Most times when people post problems like this...it is due to very poor data. So, to begin with you can make the RGB channel combine image availabl…
-
This looks like you have very noisy data. The stars are either very faint in your data (you do not have many bright ones) or your exposures are very short. OSC data in particular is prone to this kind of thing (you didn't specify). Under these cond…
-
HI Dave, You might have illustrated a different common problem. The image you have attached is a JPEG image- likely saved from a linear image you had on your PixInsight desktop. You will need to convert it to a permanently stretched creature (non-li…
-
Hi John, You know..I really wonder how important deconvolution really is in NB imagery- If you have enough signal, applying it to the Lumnance image alone is sufficient. If think what you are really asking is how you can get the OIII and SII compone…
-
Yes, I agree people like Juan (and other developers..in my earlier days it was Stan Moore) are amazing. They understand at a very deep level the math behind the algorithms. You might be surprised to learn however that they cannot foresee how the too…
-
Oh yes... the moon is a trouble maker. Not only does it brighten the sky..but the sky is BLUE! So scattered moonlight creates color issues too! -the Blockhead
-
Ooooh... that is a *very* good point. The FITs headers should be carried along. I did not notice this.Thank you, I will inform Hartmut. -the Blockhead
-
Hi Nick, Yes, DBE is your best hope- but ultimately getting good initial data is better than any post-processing could hope to do. I am surprised the flat field image didn't do more- if it did, DBE would have less heavy lifting to do...and give you …
-
I am glad the reason was a simple one. -the Blockhead
-
Yes, you have multiple entries in your Fits Header for the coordinates. Your acquisition software is writing, presumably, bad coordinates into the header file. In the meantime, check "ignore existing metadata" under the Plate Solving options of PCC.…
-
Hi Allen, When you loaded the files... did you "install" them like I did by pressing the round "global" execute button?This is found in the GAIA and APASS processes. -the Blockhead
-
Thank you Shannon!-the Blockhead
-
Great!
-
Hi Wade, Nicely done. I looked at your result by applying your DBE sample pattern to my image.I think your technique in general has merit. I had never really considered it- mostly because I thinkit happens naturally with small numbers of samples tha…
-
Give it a go and let me know: https://drive.google.com/file/d/1f6O8GkOXy_6JF0ju3CGgx8bmpqIhec7i/view?usp=sharing -the Blockhead
-
Sorry..I thought you had a DSLR.So... you say the issue is in the raw untouched data... that would be strange...but if the data is signed it could be possible. can you make some raw data available that show the issue?-the Blockhead
-
Yes... I think you did answer your question!-the Blockhead