/usr/share/sextractor/gauss_2.0_3x3.conv is in sextractor 2.4.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | CONV NORM
# 3x3 convolution mask of a gaussian PSF with FWHM = 2.0 pixels.
0.260856 0.483068 0.260856
0.483068 0.894573 0.483068
0.260856 0.483068 0.260856
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