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Change BAYESTAR low frequency cutoff to 15 Hz

Leo P. Singer requested to merge leo-singer/gwcelery:change-bayestar-f-low-to-15-hz into master

Search pipelines do not report their low frequency cutoffs in a uniform, machine readable way in the coinc.xml files. BAYESTAR has been using a default value of 30 Hz. A mismatch in low frequency cutoff will lead to a systematic bias in luminosity distance.

In O3, search pipelines used the following low frequency cutoffs:

Pipeline Cutoff
gstlal (full bandwidth, stellar mass) 15 Hz
gstlal (full bandwidth, IMBH) 10 Hz
gstlal (early warning) 10 Hz
SPIIR 15 Hz
PyCBC 18-30 Hz depending on template
MBTA (BNS) 25 Hz
MBTA (NSBH) 23 Hz
MBTA (BBH) 21 Hz

15 Hz is a compromise value that is closer to what the pipelines actually use. A complete solution would be to add an f_lower column to the sngl_inspiral table so that pipelines can report their low frequency cutoffs.

Shikata ga nai.

Edited by Leo P. Singer

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