{
  "analysis_date": "2026-09-09",
  "protocol": "Atlas JLA v1",
  "data_url": "https://supernovae.in2p3.fr/sdss_snls_jla/jla_likelihood_v6.tgz",
  "data_sha256": "2f06277628ab53ca6590c7da679714b39b2b5a0973c2f8978cebdb1626e762f4",
  "paper_url": "https://www.jp-petit.org/papers/cosmo/2018-AstrophysSpaceSci.pdf",
  "paper_sha256": "f68fece1b103e0ef7757cd0e4c509425562cf5055285fbfd7358a2b4561f26c9",
  "paper_doi": "10.1007/s10509-018-3365-3",
  "published_2018": {
    "q0": -0.087,
    "error_reported": 0.015,
    "chi2": 657,
    "dof": 738
  },
  "versions": {
    "python": "3.12.14",
    "numpy": "2.3.5",
    "scipy": "1.17.0",
    "matplotlib": "3.10.8"
  },
  "zmin": 0.01006,
  "zmax": 1.299106,
  "checks": {
    "JLA_reference_chi2": 682.8955207136313,
    "JLA_reference_expected_approx": 682.9,
    "Janus_quadrature_max_relative_error": 4.440892098500626e-16,
    "checks": "740 unique rows; covariance symmetry/Cholesky; Milne and Einstein-de Sitter limits; noiseless parameter recovery; quadrature; JLA reference; two-start joint fits"
  },
  "conditional": {
    "janus": {
      "parameter": -0.06757179068963362,
      "profile_delta_chi2_1": [
        -0.09513070426102148,
        -0.0386701188036568
      ],
      "offset": 43.21342990054641,
      "chi2": 691.0563066561917,
      "n": 740,
      "k": 2,
      "dof": 738,
      "alpha": 0.141,
      "beta": 3.101,
      "host_step": -0.07,
      "covariance": "full",
      "redshift_frames": true
    },
    "lcdm": {
      "parameter": 0.2946544371541997,
      "profile_delta_chi2_1": [
        0.26198653219591456,
        0.3289613877218351
      ],
      "offset": 43.159000252902025,
      "chi2": 682.7477900994975,
      "n": 740,
      "k": 2,
      "dof": 738,
      "alpha": 0.141,
      "beta": 3.101,
      "host_step": -0.07,
      "covariance": "full",
      "redshift_frames": true
    },
    "delta_chi2_janus_minus_lcdm": 8.308516556694258
  },
  "joint": {
    "janus": {
      "parameter": -0.06706464903968304,
      "alpha": 0.13997189427039386,
      "beta": 3.101119714467783,
      "offset": 43.21459115250106,
      "host_step": -0.07284001269835624,
      "chi2": 691.0038848592335,
      "n": 740,
      "k": 5,
      "dof": 735,
      "redshift_frames": true,
      "optimizer_agreement": 1.3642420526593924e-12
    },
    "lcdm": {
      "parameter": 0.29438290086406904,
      "alpha": 0.14133587147278798,
      "beta": 3.1028258679700427,
      "offset": 43.158916196414985,
      "host_step": -0.06991923499468086,
      "chi2": 682.74425360149,
      "n": 740,
      "k": 5,
      "dof": 735,
      "redshift_frames": true,
      "optimizer_agreement": 7.958078640513122e-13
    },
    "delta_chi2_janus_minus_lcdm": 8.259631257743536
  },
  "sensitivity": {
    "janus": {
      "diagonal_only": {
        "parameter": -0.06421639495036545,
        "profile_delta_chi2_1": [
          -0.08133120419156713,
          -0.04663975234205215
        ],
        "offset": 43.22832344941126,
        "chi2": 583.7709123140108,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": -0.07,
        "covariance": "diagonal",
        "redshift_frames": true
      },
      "no_host_step": {
        "parameter": -0.07191552226494613,
        "profile_delta_chi2_1": [
          -0.09923106287898971,
          -0.043265377237434344
        ],
        "offset": 43.18649340269208,
        "chi2": 701.9025301073278,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": 0.0,
        "covariance": "full",
        "redshift_frames": true
      },
      "zcmb_only": {
        "parameter": -0.06688626890098297,
        "profile_delta_chi2_1": [
          -0.09447902954738499,
          -0.03795003700746764
        ],
        "offset": 43.21453436219436,
        "chi2": 691.3034636329878,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": -0.07,
        "covariance": "full",
        "redshift_frames": false
      }
    },
    "lcdm": {
      "diagonal_only": {
        "parameter": 0.29600499235263117,
        "profile_delta_chi2_1": [
          0.27637194311136365,
          0.31626052673353866
        ],
        "offset": 43.17094224488656,
        "chi2": 569.3540142712851,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": -0.07,
        "covariance": "diagonal",
        "redshift_frames": true
      },
      "no_host_step": {
        "parameter": 0.2882194525468553,
        "profile_delta_chi2_1": [
          0.2559018266927432,
          0.32216314007370983
        ],
        "offset": 43.130956779360574,
        "chi2": 692.4229662593394,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": 0.0,
        "covariance": "full",
        "redshift_frames": true
      },
      "zcmb_only": {
        "parameter": 0.2954697059912003,
        "profile_delta_chi2_1": [
          0.2627690114314925,
          0.32980948800892007
        ],
        "offset": 43.160188347184935,
        "chi2": 682.8871530393801,
        "n": 740,
        "k": 2,
        "dof": 738,
        "alpha": 0.141,
        "beta": 3.101,
        "host_step": -0.07,
        "covariance": "full",
        "redshift_frames": false
      }
    }
  },
  "revision_2024": {
    "doi": "10.1140/epjc/s10052-024-13569-w",
    "publication_date": "2024-11-26",
    "article_number": 1226,
    "pdf_sha256": "f7d507f78f952d0bf5727e7e27945c178c77a7ab2ac5df10552026e3b6a6811c",
    "scope": "Documentary comparison: section 10 figure 10 cites reference 4 (2018). No new SN fit is assigned a separate chi-square here. Revised field equations are not fully rederived by this script."
  },
  "plots": {
    "maximum_absolute_curve_difference_mag": 0.19986618773963016,
    "at_redshift": 1.299106
  }
}