Event Version List
Return all event versions
Query Parameters
name-contains=<string>release=<cat1>[,<cat2>]min-<param-name>=<value>max-<param-name>=<value>lastver=<bool>: iftrueor empty, include only the last version of each event on the list. Defaults to false.include-default-parameters: iftrueor empty, include a list with the preferred values for default parameters.pagesize=<int>: Number of results to return per page.
Find the full list of allowed parameter <param-name>s in the /default-parameters/ endpoint.
Example:
GET /api/v2/event-versions?format=api&include-default-parameters=true
{ "next": "https://gwosc.org/api/v2/event-versions?format=api&include-default-parameters=true&page=2", "previous": null, "results_count": 358, "results_per_page": 20, "num_pages": 18, "page_number": 1, "results": [ { "name": "GW250114_082203", "shortName": "GW250114_082203-v1", "gps": 1420878141.2, "version": 1, "catalog": "O4_Discovery_Papers", "detectors": [ "H1", "L1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW250114_082203-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 28.6, "upper_error": 0.5, "lower_error": -0.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.03, "upper_error": 0.03, "lower_error": -0.04, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 62.7, "upper_error": 1.0, "lower_error": -1.1, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 403.0, "upper_error": 74.0, "lower_error": -70.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 33.6, "upper_error": 1.2, "lower_error": -0.8, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 32.2, "upper_error": 0.8, "lower_error": -1.3, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.09, "upper_error": 0.01, "lower_error": -0.01, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 65.8, "upper_error": 1.1, "lower_error": -1.2, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW241110_124123", "shortName": "GW241110_124123-v1", "gps": 1415277701.7, "version": 1, "catalog": "O4_Discovery_Papers", "detectors": [ "H1", "L1", "V1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW241110_124123-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 9.8, "upper_error": 0.5, "lower_error": -0.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.28, "upper_error": 0.23, "lower_error": -0.2, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 736.0, "upper_error": 270.0, "lower_error": -267.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 17.2, "upper_error": 5.0, "lower_error": -4.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 7.7, "upper_error": 2.2, "lower_error": -1.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 0.00063, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW241011_233834", "shortName": "GW241011_233834-v1", "gps": 1412725132.9, "version": 1, "catalog": "O4_Discovery_Papers", "detectors": [ "H1", "V1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW241011_233834-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 9.1, "upper_error": 0.1, "lower_error": -0.1, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": 0.49, "upper_error": 0.06, "lower_error": -0.07, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 214.0, "upper_error": 44.0, "lower_error": -48.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 19.6, "upper_error": 3.6, "lower_error": -2.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 5.9, "upper_error": 0.8, "lower_error": -0.8, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 1e-05, "upper_error": null, "lower_error": null, "is_upper_limit": true, "is_lower_limit": false } ] }, { "name": "GW240109_050431", "shortName": "GW240109_050431-v1", "gps": 1388811889.8, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW240109_050431-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 19.6, "upper_error": 2.7, "lower_error": -2.2, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.07, "upper_error": 0.2, "lower_error": -0.23, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 45.1, "upper_error": 6.5, "lower_error": -5.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 1510.0, "upper_error": 1010.0, "lower_error": -770.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 28.8, "upper_error": 7.5, "lower_error": -6.2, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 18.1, "upper_error": 4.8, "lower_error": -4.1, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.29, "upper_error": 0.16, "lower_error": -0.13, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 47.1, "upper_error": 6.7, "lower_error": -5.7, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 0.00022999999999999998, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.99, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": true }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 10.4, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW240107_013215", "shortName": "GW240107_013215-v1", "gps": 1388626353.7, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1", "L1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW240107_013215-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 36.2, "upper_error": 14.0, "lower_error": -9.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": 0.3, "upper_error": 0.3, "lower_error": -0.36, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 87.0, "upper_error": 28.0, "lower_error": -19.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 5800.0, "upper_error": 4800.0, "lower_error": -3200.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 59.0, "upper_error": 27.0, "lower_error": -18.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 32.0, "upper_error": 20.0, "lower_error": -16.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.87, "upper_error": 0.56, "lower_error": -0.43, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 91.0, "upper_error": 29.0, "lower_error": -20.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 0.028, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.99, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": true }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 9.6, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW240105_151143", "shortName": "GW240105_151143-v1", "gps": 1388502721.2, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW240105_151143-v1?format=api", "default_parameters": [ { "name": "far", "unit": "1/yr", "description": "na", "best": 3.3, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.7, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 25.9, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW240104_164932", "shortName": "GW240104_164932-v1", "gps": 1388422190.6, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW240104_164932-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 31.8, "upper_error": 5.1, "lower_error": -3.9, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": 0.09, "upper_error": 0.19, "lower_error": -0.19, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 70.6, "upper_error": 10.7, "lower_error": -7.9, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 1910.0, "upper_error": 1090.0, "lower_error": -950.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 42.3, "upper_error": 9.4, "lower_error": -6.7, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 32.1, "upper_error": 7.5, "lower_error": -8.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.35, "upper_error": 0.16, "lower_error": -0.16, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 74.3, "upper_error": 11.4, "lower_error": -8.5, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 1e-05, "upper_error": null, "lower_error": null, "is_upper_limit": true, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.99, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 14.8, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW231231_154016", "shortName": "GW231231_154016-v1", "gps": 1388072434.7, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW231231_154016-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 17.1, "upper_error": 1.6, "lower_error": -1.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.03, "upper_error": 0.12, "lower_error": -0.12, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 38.1, "upper_error": 4.0, "lower_error": -3.2, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 1070.0, "upper_error": 600.0, "lower_error": -530.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 22.5, "upper_error": 5.7, "lower_error": -3.3, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 17.2, "upper_error": 2.9, "lower_error": -3.2, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.21, "upper_error": 0.1, "lower_error": -0.1, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 39.9, "upper_error": 4.1, "lower_error": -3.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 1e-05, "upper_error": null, "lower_error": null, "is_upper_limit": true, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.99, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": true }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 13.4, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW231231_120147", "shortName": "GW231231_120147-v1", "gps": 1388059325.6, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1", "L1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW231231_120147-v1?format=api", "default_parameters": [ { "name": "far", "unit": "1/yr", "description": "na", "best": 4.5, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.86, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 11.3, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW231230_170116", "shortName": "GW231230_170116-v1", "gps": 1387990895.0, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1", "L1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW231230_170116-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 36.9, "upper_error": 14.3, "lower_error": -8.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.19, "upper_error": 0.34, "lower_error": -0.35, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 85.0, "upper_error": 47.0, "lower_error": -19.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 5700.0, "upper_error": 4800.0, "lower_error": -3200.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 54.0, "upper_error": 50.0, "lower_error": -15.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_2_source", "unit": "M_sun", "description": "na", "best": 35.0, "upper_error": 15.0, "lower_error": -14.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "redshift", "unit": "", "description": "na", "best": 0.87, "upper_error": 0.56, "lower_error": -0.43, "is_upper_limit": false, "is_lower_limit": false }, { "name": "total_mass_source", "unit": "M_sun", "description": "na", "best": 89.0, "upper_error": 49.0, "lower_error": -20.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "far", "unit": "1/yr", "description": "na", "best": 0.42, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "p_astro", "unit": "", "description": "na", "best": 0.96, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false }, { "name": "network_matched_filter_snr", "unit": "", "description": "na", "best": 8.2, "upper_error": null, "lower_error": null, "is_upper_limit": false, "is_lower_limit": false } ] }, { "name": "GW231226_101520", "shortName": "GW231226_101520-v1", "gps": 1387620938.3, "version": 1, "catalog": "GWTC-4.0", "detectors": [ "H1", "L1" ], "detail_url": "https://gwosc.org/api/v2/event-versions/GW231226_101520-v1?format=api", "default_parameters": [ { "name": "chirp_mass_source", "unit": "M_sun", "description": "na", "best": 32.4, "upper_error": 1.8, "lower_error": -1.4, "is_upper_limit": false, "is_lower_limit": false }, { "name": "chi_eff", "unit": "", "description": "na", "best": -0.09, "upper_error": 0.09, "lower_error": -0.1, "is_upper_limit": false, "is_lower_limit": false }, { "name": "final_mass_source", "unit": "M_sun", "description": "na", "best": 71.4, "upper_error": 3.8, "lower_error": -2.8, "is_upper_limit": false, "is_lower_limit": false }, { "name": "luminosity_distance", "unit": "Mpc", "description": "na", "best": 1180.0, "upper_error": 240.0, "lower_error": -350.0, "is_upper_limit": false, "is_lower_limit": false }, { "name": "mass_1_source", "unit": "M_sun", "description": "na", "best": 40.1, "upper_error": 4.4, 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