
Data files regarding PTA observations of a common-process spectrum fit to a power law.
It contains data from their analyses to fit the amplitude and slope of the potential
SGWB observed (observations from 2020-22 papers not confirmed to follow Hellings-Downs curve, yet).

References:

    The references for the NANOGrav, PPTA, and EPTA results are:

        - [NANOGrav], "The NANOGrav 12.5 yr data set: Search for an isotropic
        stochastic gravitational-wave background," Astrophys. J. Lett. 905,
        L34 (2020), arXiv:2009.04496

        - B. Goncharov et al., "On the evidence for a common-spectrum process
        in the search for the nanohertz gravitational-wave background with the
        Parkes Pulsar Timing Array," Astrophys. J. Lett. 917, L19 (2021),
        arXiv:2107.12112

        - S. Chen et al., "Common-red-signal analysis with 24-yr high-precision
        timing of the European Pulsar Timing Array: Inferences in the stochastic
        gravitational-wave background search," Mon. Not. Royal Astron. Soc.
        508, 4970 (2021), arXiv:2110.13184

    - J. Antoniadis et al., "The International Pulsar Timing Array second data
    release: Search for an isotropic Gravitational Wave Background," Mon. Not.
    Royal Astron. Soc. 510, 4873 (2022), arXiv:2201.03980

    These files have been used for the work:

    - A. Roper Pol, C. Caprini, A. Neronov, D. Semikoz, "The gravitational wave signal
    from primordial magnetic fields in the Pulsar Timing Array frequency band,"
    Phys.Rev.D 105, 12, 123502 (2022), arXiv:2201.05630.

    The 'old' reference for EPTA ('EPTA_singlePL_1s_old' and 'EPTA_singlePL_2s_old') is taken from:

    - Talk at the 3rd Annual Assembly GdR “Ondes Gravitationnneles" by S. Chen,
    "25 years of European Pulsar Timing Array."

    The NANOGrav and the old EPTA references were used in the work:

    - A. Neronov, A. Roper Pol, C. Caprini, D. Semikoz, "NANOGrav signal from magnetohydrodynamic
    turbulence at the QCD phase transition in the early Universe," Phys. Rev. D 103, L041302
    (2021), arXiv:2009.14174

Files: 

- 'excluded_max_EPTA24yr'

    includes 'f' and 'CP' corresponding to the maximum values compatible to the observations
    with the 2sigma violin plots using the noise model ENTERPRISE (EP) for common-uncorrelated red
    noise (CURN), see their figure 3

- 'excluded_max_PPTA15yr'

    analogous to 'excluded_max_EPTA...' for PPTA using the assumption of timing noise only in specific pulsars,
    see their figure 1

- 'excluded_max_NG12p5yr'

    analogous to 'excluded_max_EPTA...' for NANOGrav, see their figure 1

- 'excluded_max_IPTA_DR2'

    analogous to 'excluded_max_EPTA...' for IPTA, see their figure 1

- 'EPTA_singlePL_2s_new_42'

    includes 'A' and 'gamma' corresponding to the 2sigma amplitudes of an common-uncorrelated red noise (CURN) power
    law spectrum using the noise model DR 42 Chebyshev for CURN, see their figure 3

- 'EPTA_singlePL_1s_EP' and 'EPTA_singlePL_2s_EP'

    similar to 'EPTA_singlePL_2s_new_42' with 1sigma and 2sigma amplitudes using the noise model
    ENTERPRISE (EP) for CURN 

- 'NANOGrav_brokenPL_1s' and 'NANOGrav_brokenPL_2s'

    similar to 'EPTA_singlePL_2s_new_42' using the broken power law fit of NANOGrav data,
    see their figure 1

- 'NANOGrav_singlePL_1s' and 'NANOGrav_singlePL_2s'

    same as 'NANOGrav_brokenPL' using the single power law fit of NANOGrav data,
    see their figure 1

- 'PPTA_blue_1s' and 'PPTA_blue_2s'
 
    similar to 'EPTA_singlePL_2s_new_42' using the single power law fit of PPTA data and the
    assumption of timing noise only in specific pulsars, see their figure 1

- 'IPTA_1s' and 'IPTA_2s'

    similar to 'EPTA_singlePL_2s_new_42' using the single power law fit of IPTA data (DR2) and
    using the full auto + cross-correlations, see their figure 3
