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BlockHead
About
- Username
- BlockHead
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Comments
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In terms of galaxies, the continuum subtraction is important because of the starlight (the galaxy) that the HII regions are blended with. This isn't an issue with vdB 152. Subtracting the continuum contribution of the sky can help with the contrast.…
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Hmmm... this is something I think you need to direct to the official Forum care of Roberto Sartori. When doing grouping- there is A LOT of logic going on behind the scenes. For example (this is very specific, and an advanced thing..do not do this) …
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I suspect that this has less to do with the order of operations and more to do with your choice/setup of the BN correction in SPCC. -the Blockhead
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HI Frederic, This is an example where I think practice needs to play a part of the answer. The first thing that strikes me is that the galaxy is green. (It shouldn't hurt anything... but why did you run SPCC twice?). 1. What did the image look like…
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Hi Steven, Short answer an asteroid.Longer answer... I hope you will find "I have a video for that... " -the Blockhead
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Before I answer ... you took the ratio of these flats right? (not actually a difference, but divided one by the other?) -the Blockhead
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Generally when processing data you will want to keep the files in 32-bit format in order to keep the full precision of the number. Later, when you have a final image (perhaps saving as a TIF) going to 16-bit is no problem. Likely the answer to your…
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Ah... it looks a bit undersampled (and perhaps you used BXT). So, yes, the galaxies will look like stars. There is a small chance if you drizzled the date it *might* help... but no guarantees. I do not know of a good (non-selective) way to do what y…
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Just out of curiosity... it does this on a linear image?-the Blockhead
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This is likely a memory problem... likely in RAM memory. The technical interpretation of a segmentation error is that a program is accessing memory that is not allocated to it. This could either be because of bad programming (not likely or everyone …
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David, This is different. This means your PixInsight has not been updated.You need to go to manage your Repositories and make certain they say 1.8.9-1 .Follow these steps:https://www.adamblockstudios.com/articles/fix-missing-components-pixinsight-in…
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Oh... you did this through the browser IN PixInsight?I know you can do this... but this isn't something I am teaching... I feel there could be some issues.Good catch!-the Blockhead
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Hi Frederic, I explain this in detail in a number of sections on HDRMT. HDRMT uses wavelets- a spatio-frequency function. This function is correlated with the number of pixels that are being operated on. So the size of the frame will give you a uniq…
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It is part of Pixel Math.You will find it in "Generators." -the Blockhead
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Hi Bret, Have you watched my FastTrack Training video? You can see me do this stuff... I believe I specifically step through showing this. You will not want to try to click or open the file. It needs to be loaded into the GAIA process. (PixInsight n…
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Yes, your logic sounds fine to me. There are a number of ways to approach this- but the simplest (these days) would be to create a starless image and use it as a mask (or just apply the color saturation to the starless image itself). You can always …
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I am sorry Bret..I need more information (or a screen capture) to understand.When you download the GAIA star catalogues- you do this from your Browser having navigated to the PI serve (your account, you need to log in). If the pop up you are referr…
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Yes, it would.BUT.. things get tricky. If you start from extracting stars at the linear stage- what happens is that you stretch your Galaxy..and THEN you need to stretch your stars. But how much? They will not play well together unless you are very …