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Published 20 hours ago • verified publisher icon JohannesBuchner

p_any cutoff

Open satishastro opened this issue 9 months ago • 1 comments

Q. The value of the p_any cutoff, calculated in the following manner, can be used again to improve the best match or just to report in a paper to show the percentage of false detections.

You can calibrate a p_any cut-off with the following steps:

  1. Create a offset catalogue to simulate random sky positions: nway-create-fake-catalogue.py --radius 40 COSMOS_XMM.fits COSMOS_XMM-fake.fits
  2. Match the offset catalogue in the same way as this run: ../nway.py COSMOS_XMM-fake.fits :pos_err COSMOS_OPTICAL.fits 0.1 --out=examplenway.fits-fake.fits --radius 20 --prior-completeness 0.9
  3. determining the p_any cutoff that corresponds to a false-detection rate nway-calibrate-cutoff.py examplenway.fits examplenway.fits-fake.fits

satishastro avatar Sep 16 '23 23:09 satishastro

That is true; I guess it should be stated clearer in the manual?

JohannesBuchner avatar Oct 02 '23 08:10 JohannesBuchner