One of our functional tests of astrometry.net is a run through an immense amount of SDSS data, looking to see what percentage we solve (>99 percent) and what percentage solve as false positives (we have never had one, so <3×10−5). I diagnosed a failure today and found this (small cutout shown below). It is an engineering-grade SDSS image, where the PSF is double-peaked, and different stars have different peaks dominant (some left, some right). Now that's what I call bad data. Can we be blamed for failing to solve that?
Did the peak finder think they were multiple objects and this screwed up the quad finding?
ReplyDelete(p.s. my "word verification" for this comment was eatpo :)