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Pickup electronic noise is present in all 3 bands on the left hand side. The amplitude peaks at 0.16 DN, 0.12 and 0.15 at J, H and K. There is some indication that K has some pickup on the right hand side as well, with a maximum amplitude of 0.11 DN. The limits on the right hand side for J and K are 0.04 and 0.05 DN.
The one sigma error in calculating the amplitude of the pickup is observed to be 0.019 DN at J and 0.032 DN at H, as calculated from the right hand side for J and H, assuming that there is no actual pickup noise detected.
The following plots show the detected amplitude vs. detected period using T. Jarrett's latest modified Fourier Transform software, which performs a Fourier transform to find the dominant period, and then analyzes the coadd the determine the actual amplitude near that period.
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http://spider.ipac.caltech.edu/staff/tchester/2mass/analysis/noise/j_bias/971116n/s116/index.html
Comments and feedback: Tom Chester
Last update: 9 November 1998.