Dataset Open Access

IPTA DR2 - GWB analysis MCMC output

International Pulsar Timing Array Collaboration

IPTA DR2 common red noise, MCMC output
 

These files are the primary output from a Markov chain Monte Carlo (MCMC) sampling process. They are samples from the posterior probability distribution for a particular model described in the companion paper.

Each zipped tarball contains four files.  The "chain" file has several tab-separated columns, each of which corresponds to a model parameter, except the last four which are metadata.  The parameter names (including metadata) are listed in the companion "params" file.  The frequencies used in the common red noise models are listed in the "crn_frequencies" file.  Additional information is provided in a README file.

Each row of the chain file is one sample from the model posterior.  The first samples at the beginning of the MCMC are the "burn-in" phase, before the chain has converged to the posterior.  We recommend discarding the first ~25% of samples before using them to make inferences.

Files (665.2 MB)
Name Size
iptadr2-fix_gamma_CP.tgz
md5:7d39b956acb49aa9ab87e03bdb78a81b
163.8 MB Download
iptadr2-fix_gamma_HD.tgz
md5:0310306c7490194f0aa1cdd0ff296bc8
53.0 MB Download
iptadr2-free_spec_CP.tgz
md5:4ba210de6003438516fa30cc473839a3
235.5 MB Download
iptadr2-vary_gamma_CP.tgz
md5:e7d6b795e05ec0d7e97b999cf832957c
163.0 MB Download
iptadr2-vary_gamma_HD.tgz
md5:563be3fe1ea175aa9493474ac2309831
49.8 MB Download
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