/usr/share/sextractor/tophat_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 top-hat PSF with diameter = 2.0 pixels.
0.080000 0.460000 0.080000
0.460000 1.000000 0.460000
0.080000 0.460000 0.080000
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