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No convergence in MRS noise evaluation routine

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mschuster:
In ImageIntegration I am getting the warning 'No convergence in MRS noise evaluation routine' on the resulting integration. However when I run the NoiseEvaluation script on the result I don't get this warning.

Thanks, Mike

Juan Conejero:
Hi Mike,

This shouldn't happen. I'd need some of these images to investigate what happens. Could you upload them to Endor? Thanks!

mschuster:
Hi Juan,

Data uploaded as MRSNoiseWarning.zip in Forum Shared Files mschuster.

18x2400s dithered H-a subs at 4.2"/pixel calibrated in PI. sub09 is the SA master (not resampled).

Thanks,
Mike

mschuster:
What is the status of this problem? I am seeing this error repeatedly on all of my integrations since July, and sometimes also on individual registered frames.
Thanks,
Mike

Juan Conejero:
Hi Mike,

This bug is now fixed in version 1.8. Sorry for not reporting it here. MRS noise evaluation should never fail in the next version, except in very strange cases (basically, it can only fail when there is virtually no signal in the image).

Along with this bug, I have added the noise evaluation functionality to the ImageCalibration tool. This fixes the problem that we had in previous versions with noise evaluation on smoothed data due to registration interpolation. IC now evaluates the noise just after calibration, and stores the noise estimates in special FITS header keywords. ImageIntegration detects these keywords and uses them if they are present.

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