/usr/share/sextractor/mexhat_2.5_7x7.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 6 7 8 9 | CONV NORM
# 7x7 convolution mask of a mexican-hat for images with FWHM~2.5 pixels.
-0.000284 -0.002194 -0.007273 -0.010722 -0.007273 -0.002194 -0.000284
-0.002194 -0.015640 -0.041259 -0.050277 -0.041259 -0.015640 -0.002194
-0.007273 -0.041259 -0.016356 0.095837 -0.016356 -0.041259 -0.007273
-0.010722 -0.050277 0.095837 0.402756 0.095837 -0.050277 -0.010722
-0.007273 -0.041259 -0.016356 0.095837 -0.016356 -0.041259 -0.007273
-0.002194 -0.015640 -0.041259 -0.050277 -0.041259 -0.015640 -0.002194
-0.000284 -0.002194 -0.007273 -0.010722 -0.007273 -0.002194 -0.000284
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