Agenda
Minutes
calibration Simon: I have a recollection of calibration making a much larger change to the sky location than now
Matt: Yes, this was when there was a single calibration uncertainty across the band, here we are using an envelope which makes the difference much smaller
Matt: These tests all look good to me, not much more we can do. Happy with things as they are.
Simon (in chat): Yup look good
Matt: Is there anything to say about the rest of the results from Sylvia?
Greg: The rough outline is that Sylvia found L.I. and bilby handle the calibration differently. She is investigating that, but this tests suggests that the way they handle the calibration has the same effect on the source parameters, i.e. publication plots are uneffected.
Greg: So are the reviewers happy to sign off at this level?
Reviewers (in chat): yes
GW170817
Greg: Here is a first look at run on O3 L.I. and bilby using a reduced chirp-mass ROQ built by Rory. Things look different, especially in the chirp mass, geocent time, dL, and lambda_tilde
Consensus is that this is likely a prior issue, action item Greg to compare the priors
GW190425
Greg: added to check if there was actually a bug in bilby, this suggests there is not
AOB
Greg: Let's end the recurring meetings. Our final review item is 170817 for which we can just communicate via email and with the LVC meeting next week it will be difficult to meet anyway.
Chat
<08:04:06> "Greg Ashton [h]": https://git.ligo.org/lscsoft/bilby_pipe/wikis/O3-review/minutes/190828 <08:05:05> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_review/calibration_review/compare_all/home.html <08:05:40> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_review/calibration_review/compare_all/html/Comparison_geocent_time.html <08:06:26> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_review/calibration_review/compare_all/html/Comparison_luminosity_distance.html <08:07:02> "Simon Stevenson": What about sky area? <08:07:33> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_review/calibration_review/compare_all/html/Comparison_dec.html <08:07:50> "Simon Stevenson": hand up <08:08:54> "Matt Pitkin [h]": hand up <08:09:45> "Simon Stevenson": ok thanks Matt <08:10:30> "Matt Pitkin [h]": nope <08:10:58> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_review/calibration_review/compare_all/html/Comparison_phi_jl.html <08:12:16> "Simon Stevenson": Yup this looks good <08:15:59> "Matt Pitkin [h]": Yes <08:17:45> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_pe_event_samples/GW170817/comparison/html/Comparison_chirp_mass.html <08:18:22> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/bilby_pe_event_samples/GW170817/comparison/html/Comparison_lambda_tilde.html <08:21:44> "Simon Stevenson": I think seeing a comparison of the priors would be useful. <08:24:41> "Greg Ashton [h]": https://ldas-jobs.ligo.caltech.edu/~gregory.ashton/O3/C01_190425/comparison_EXP2_EXP3_all/home.html <08:25:28> "Matt Pitkin [h]": For lalinference_nest just add "--sampleprior N" where N is the number of samples to draw from the prior <08:27:32> "Simon Stevenson": Looks fine to me <08:27:45> "Matt Pitkin [h]": yes, thanks <08:28:32> "Matt Pitkin [h]": nope <08:28:46> "Simon Stevenson": no <08:28:48> "Matt Pitkin [h]": no, I wont be there <08:29:17> "Matt Pitkin [h]": sounds good <08:29:35> "Matt Pitkin [h]": no objections <08:30:59> "Matt Pitkin [h]": I am very happy for you to do our work for us  <08:31:16> "Simon Stevenson": Bye! <08:31:21> "Isobel Romero-Shaw": bye