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Add line persistency figures of merit to lalapps_spec_avg_long

Evan Goetz requested to merge add-line-persistency into master

Description

This MR adds two new features to lalapps_spec_avg_long to enable further study of spectral artifacts: 1) a measure of the percentage of time each bin is above a threshold of 3 times the background noise ("persistency"); and 2) of a list of lines specified by the user and the program outputs another file that reveals when that line is above threshold as a function of time (provides a 0 or 1 as a function of the SFT number for each line specified). The two outputs are beneficial for studying the time variability of lines over the course of long observing intervals. It does not modify any of the other code behaviour.

API Changes and Justification

Backwards Compatible Changes

  • This change introduces no API changes
  • This change adds new API calls

Backwards Incompatible Changes

  • This change modifies an existing API
  • This change removes an existing API

If any of the Backwards Incompatible check boxes are ticked please provide a justification why this change is necessary and why it needs to be done in a backwards incompatible way.

Review Status

Worth having a look over by @keith-riles, @karl-wette, or @david-keitel.

Edited by Evan Goetz

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