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TWEAKREG output figure 1 (i.e. 2d histogram) missing

sczoosczoo Member Posts: 1
Hello all,

I run "tweakreg" on WFC3/UVIS images which were observed in a single day with 4 orbits. Everytime I run "tweakreg", I don't have the two-dimensional histogram of offsets while the other two plots - vector plot and residual plot - come out without any problem.

Anyone knows why?

For your reference, I set both "use2dhist" and "see2dhist" parameters as "yes".
I run PyRAF in AstroConda environment on my iMac OS 10.13.5 (High Sierra).


2560 x 1440 - 1M
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