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Bug about dual image mode?
Dear All, I met a problem with sextractor dual image mode. I tried to use sextractor with dual image mode and single image mode to do photometry to same image: sex -c default.sex a.fits -WEIGHT_IMAGE...
View ArticleAll AstrOmatic tools in OS Ubuntu Astronomy 16.04 (64-bit)
Hello, you can download and try my open project Ubuntu Astronomy 16.04 (64-bit). It contains all AstrOmatic tools.
View Articleastrometric uncertainties
Hello, Some explanation is likely warranted. The observational minor planet community uses diverse tools to acquire astrometry on asteroids and comets. The Catalina Sky Survey (CSS)...
View ArticleHow to fit a linear distortion ?
Hi I was testing what happens when using a 1st order polynomial fit in Scamp (DISTORT_DEGREES=1), that is a linear model for the distortions. The distortion model is then x' = PV1_0 + PV1_1x + PV1_2y...
View ArticleHow do I create mosaic distortion plots?
Given a 4 CCD mosaic camera, if I treat CCDs separately in Sextractor and Scamp, is there any way to assembly the individual CCD distortion PNG maps into one single mosaic plot? Many thanks in advance!
View ArticleHow to set Scamp VizieR catalog search radius?
I think I've read the SCAMP manual quite well, but I could not find if there is a way to tell/order Scamp to search stars in VizieR within a (safer larger) radius, there is such an option in Scamp?...
View ArticleInaccurate astrometry in SCAMP/SWarp workflow - A challenge?
Hello to everyone who reads this. I have a problem that has plagued me for a little while and, honestly, am not sure whether it is with SCAMP or SWarp. The work that I do is typically with largish...
View ArticleDetermining camera+lens distortions with Scamp
Hi I am digitizing old astronomical photographic glass plates with a digital camera, and I want to determine the distortions caused by the camera+lens combination. I have got the following recipe: 1)...
View ArticleDelete all FITS keywords?
Is there any way to delete all the keywords from one FITS image header? Otherwise, could I replace one existing long header of an existing image with another small set defined in ASCII format? Many...
View ArticlePoor astrometric solution with UCAC-4
Hello all, on several fields I came across poor astrometric solution when using UCAC-4. There was always much better solution with UCAC-3 on the same images. The most obvious difference was the...
View ArticleBug: image offset by 1 column
I recently switched from stiff version 2.4.0 to 2.6.1. Unfortunately the new version suffers from a bug which causes the image to roll by 1 pixel to the left. I'd much appreciate an updated program...
View Articledwarf galaxies
Hi, any idea how to set Sextractor parameters to make it see a (nearby) dwarf galaxy as a single galaxy and not a bunch of stars? Anyone had an experience with dwarfs?
View ArticleSTABILITY_TYPE =- PREDISTORTED mode?
Does anyone have more information about how the STABILITY_TYPE=PREDISTORTED mode works? Does scamp expect a "scamp-type" distortion solution (i.e. PV keywords) in the header? If I then ask scamp to...
View ArticleHow can I save the astrometry error result as text file ?
Hi, As I know, I can check astrometry result from only PS images. But, when I deal with a lot of data, checking images one by one is very hard work. So, I want to know how result data can save to text...
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Tricks to install scamp plplot/qhull in openSUSE Tumbleweed
Dear Folks, I've noted that the installation of scamp in new LINUX boxes is an issue. For many LINUX distributions, default plplot libraries are version 5.11 or higher and the library libplplotd.so.11...
View ArticleSegmentation map missing object
I am using SExtractor 2.19.5 and have come across a bug that seems to have been reported back in 2008. In rare instances, we are seeing that a detected object is not present in the segmentation map,...
View ArticleSegmentation fault
I am new to scamp. I have used sextractor on many occasions.. I got the segmentation fault with scamp. I believe I may not be running it properly. In short, first I run sextractor with: sex -c...
View ArticleBackground Subtraction issue when swarping
Hi all, I have a question related to the background subtraction of SWarp (v2.38.0). I was trying to combine a list of images into a single mosaic. Hence I would like to subtract the background of each...
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A pattern in simulated image.
Hi all, I'm trying to simulate HST/ACS F606W and F814W band images. After using Stuff to create a mock catalogs for both bands, on simulated images the pattern is clearly visible (see image: left panel...
View ArticleScamp fails to run
Hi, I successfully installed scamp-2.0.4, however, when I try to test if it works correctly following the install by typing 'scamp' in the command line, I get the following error message: dyld: Library...
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