Eta range selection for EPD and TPC event planes

This is an update since my last post: https://drupal.star.bnl.gov/STAR/blog/dchen/eta-weighing-epd-event-planes-fxt-72-gev

In that post, I showed that POL3 didn't give confident fits to v1 VS. eta in each centrality. I want to improve the quality of the v1, so I need to find good eta ranges for EPD and TPC event planes where they have good correlations.

Please check the attachment for the details:

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Update (June 24, 2020), a new attachment for EPD meeting: