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NaNs in DCHISQ,RCHI2 outputs for DR4 #147

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djschlegel opened this Issue May 9, 2017 · 0 comments

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djschlegel commented May 9, 2017

A total of 7 bricks in DR4 (dr4b) have NaNs in a handful of the DCHISQ,RCHI2 outputs. This appears to be due to a bug in rendering the model images.

Those files are:
tractor-1312p457.fits
tractor-1798p450.fits
tractor-2076p525.fits
tractor-2346p535.fits
tractor-2484p402.fits
tractor-2547p540.fits
tractor-2819p415.fits

For the brick 1312p457, 5 objects have non-finite values for the r-band RCHI2, and all fall within a region where the model image has been rendered with crazy-looking values (between approx -1e20 and +1e20). The actual image does not have crazy values, but this region is next to masked areas.

screen shot 2017-05-09 at 1 55 14 pm

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