The NANOGrav 12.5-year narrowband data set (public release "12yv4") is the supplemental data set accompanying Alam et al. 2021, "The NANOGrav 12.5 yr Data Set: Observations and Narrowband Timing of 47 Millisecond Pulsars," 2021, Astrophysical Journal Supplements, 252, 4, DOI: 10.3847/1538-4365/abc6a0. It contains narrowband pulse times of arrival, one-dimensional pulse templates, pulsar timing models, timing residuals, and clock files.
\n\nDetails about the contents of these files are contained in NANOGrav_12yv4_narrowband/README, as well as in NANOGrav_12yv4_narrowband/narrowband/README.narrowband. The wideband version of this dataset (published in Alam et al. 2021, ApJS, 252, 5, DOI: 10.3847/1538-4365/abc6a1) can be found at Zenodo DOI: 10.5281/zenodo.4312887. Both the narrowband and wideband data sets are also available at data.nanograv.org.
\n\nAnalysis of the 12.5-year narrowband dataset will be published in Arzoumanian et al. 2021, "The NANOGrav 12.5-year Data Set: Search for an Isotropic Gravitational-Wave Background," accepted for publication in ApJ Letters, 2020arXiv200904496A.
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