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jroulet / O2_samples

Supplementary material to https://arxiv.org/abs/1904.07214 "New Binary Black Hole Mergers in the Second Observing Run of Advanced LIGO and Advanced Virgo"
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Access to PSDs? #1

Open avivajpeyi opened 4 years ago

avivajpeyi commented 4 years ago

Hi @jroulet!

I tried plotting the LVC GW150914 posterior samples (obtained from GWOSC) against your GW150914 samples, and the results appear rather different: GW150914_corner

I was wondering -- could you upload your PSDs that you used for your analysis? Id like to try re-doing your analysis to better understand why the results are so different.

Thanks!

jroulet commented 4 years ago

Dear Avi, Thank you for your interest. I do not recover your plot when I download the samples myself from the repository, please find attached the plot I get. The culprits seem to be the transformations of the mass parameters. The samples report mchirp and eta. To be sure: mchirp is the detector-frame chirp mass, i.e. mchirp = (1+z) (m1_sourcem2_source)0.6 / (m1_source+m2_source)0.2 where z is the cosmological redshift and m1_source, m2_source are the source-frame component masses. eta is the symmetric mass ratio: eta = m1*m2/(m1+m2)**2

Could you please double-check whether you are using these definitions? This said, if you still would like to have the PSDs let me know and I will be happy to provide them. Best regards, Javier

El lun, 30 nov 2020 a las 21:31, Avi Vajpeyi (notifications@github.com) escribió:

Hi @jroulet https://github.com/jroulet!

I tried plotting the LVC GW150914 posterior samples (obtained from GWOSC) against your GW150914 samples, and the results appear rather different: [image: test] https://user-images.githubusercontent.com/15642823/100689792-4e544f00-33d9-11eb-9c49-eb7ee08ce2c2.png

I was wondering -- could you upload your PSDs that you used for your analysis? Id like to try re-doing your analysis to better understand why the results are so different.

Thanks!

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avivajpeyi commented 4 years ago

Ah, I did not realise the samples headings were for

Correcting the above, I get: test (haven't calculated the z values as they take a while to compute).

Would it still be possible to upload your PSDs?