#- Catalog -ĬATALOG_NAME test.cat # name of the output catalogĬATALOG_TYPE ASCII_HEAD # NONE,ASCII,ASCII_HEAD, ASCII_SKYCAT, # Default configuration file for SExtractor 2.19.5 Is any one know what happened to my image? Bug? The SNR of the source in dual image mode is much lower than that in single image mode. Theoretically speaking, I should get same results for same sources. Sex -c x a.fits,a.fits -WEIGHT_IMAGE a.weight.fits,a.weight.fits -PARAMETERS_NAME dual.param Sex -c x a.fits -WEIGHT_IMAGE a.weight.fits -PARAMETERS_NAME dual.param I tried to use sextractor with dual image mode and single image mode to do photometry to same image: I met a problem with sextractor dual image mode. Gain: 0 e-/ADU Flux scaling (astrom/photom): 1 X / 1 X SWarp 2.38.0 started on at 13:10:47 with 8 threads Are there some flags that I need to add to enable background subtraction for all of the input images? Thanks in advance for your reply! SUBTRACT_BACK Y # Subtraction sky background (Y/N)?īACK_SIZE 128 # Background mesh size (pixels)īACK_FILTERSIZE 3 # Background map filter range (meshes)īelow is the SWarp output of all these images, as you can see only the first one show a non-zero background value. Hence I would like to subtract the background of each of them then combine them together with average or median.īut what I noticed is that the background is only subtracted for the first image in the list, or at least that's what the output of Swarp indicated. I was trying to combine a list of images into a single mosaic. I have a question related to the background subtraction of SWarp (v2.38.0). > WARNING: FLAGS parameter not found in catalog cat.fits > WARNING: precessing EQUINOX 0.00 to 2000.00 SCAMP 2.0.4 started on at 13:19:47 with 4 threads Where default.scamp I changed only FWHM_THRESHOLDS from 0.5 to 10 and MATCH_FLIPPED to YES, since in my case I believe the axes are flipped. sex file to get cat.fits file as an output catalog with all the relevant fields: Where I have put FITS_LDAC as suggested in.

I believe I may not be running it properly. I have used sextractor on many occasions.

Astrometry net compile