{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:DQHI2CQOL4XSZLZVM5LQVPUDF7","short_pith_number":"pith:DQHI2CQO","canonical_record":{"source":{"id":"1908.00889","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-02T14:42:14Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"2744e984f97dcb84c901ded4693115afe8c3a63d76cf596d8e5c5697978b4120","abstract_canon_sha256":"b9942e5111494f8a1cd8eff637a098010c6e94af70a13e2f2b06770860b15212"},"schema_version":"1.0"},"canonical_sha256":"1c0e8d0a0e5f2f2caf3567570abe832fc8e659a9fb1e6a4d4e190138d075772d","source":{"kind":"arxiv","id":"1908.00889","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.00889","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"arxiv_version","alias_value":"1908.00889v4","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.00889","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_12","alias_value":"DQHI2CQOL4XS","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_16","alias_value":"DQHI2CQOL4XSZLZV","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_8","alias_value":"DQHI2CQO","created_at":"2026-07-05T00:55:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:DQHI2CQOL4XSZLZVM5LQVPUDF7","target":"record","payload":{"canonical_record":{"source":{"id":"1908.00889","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-02T14:42:14Z","cross_cats_sorted":["astro-ph.CO","gr-qc"],"title_canon_sha256":"2744e984f97dcb84c901ded4693115afe8c3a63d76cf596d8e5c5697978b4120","abstract_canon_sha256":"b9942e5111494f8a1cd8eff637a098010c6e94af70a13e2f2b06770860b15212"},"schema_version":"1.0"},"canonical_sha256":"1c0e8d0a0e5f2f2caf3567570abe832fc8e659a9fb1e6a4d4e190138d075772d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:55:03.028675Z","signature_b64":"GGLFG8foVBNjywaY54+qWe2heX5q7YiTka99VoF3+q907pR/1DjW1FnQS9Me3tsgLzPVViXId9wte+xmpUyBCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1c0e8d0a0e5f2f2caf3567570abe832fc8e659a9fb1e6a4d4e190138d075772d","last_reissued_at":"2026-07-05T00:55:03.028256Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:55:03.028256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.00889","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:55:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pqUUEwyzM8XTOtS8GSzAr0Gxu9UCn2DXsXDFnBz8uGGwVXEwk2viw9mwN8dgbOJcTmyD8mkg96ELFocA47tdAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T10:41:38.008412Z"},"content_sha256":"0618fb900cbb6b9ed22a8f976e78799b04447b288bec954dc19544b6b18e7fd0","schema_version":"1.0","event_id":"sha256:0618fb900cbb6b9ed22a8f976e78799b04447b288bec954dc19544b6b18e7fd0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:DQHI2CQOL4XSZLZVM5LQVPUDF7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On standardizing kilonovae and their use as standard candles to measure the Hubble constant","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"David A. Coulter, Jack Heinzel, Mattia Bulla, Michael W. Coughlin, Nandita Khetan, Nelson Christensen, Ryan J. Foley, Sarah Antier, Tim Dietrich","submitted_at":"2019-08-02T14:42:14Z","abstract_excerpt":"The detection of GW170817 is revolutionizing many areas of astrophysics with the joint observation of gravitational waves and electromagnetic emissions. These multi-messenger events provide a new approach to determine the Hubble constant, thus, they are a promising candidate for mitigating the tension between measurements of Type Ia supernovae via the local distance ladder and the Cosmic Microwave Background. In addition to the \"standard siren\" provided by the gravitational-wave measurement, the kilonova itself has characteristics that allow to improve existing measurements or to perform yet a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.00889","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.00889/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:55:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VyZ7G7i+yPOJwTZ7FScKUEbW8CzhygX5vn95RkyHb1/cuIp8C5uFrcLpXbyuoPvHFYS+0ZjCzJNFPKJTKOhuBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T10:41:38.008978Z"},"content_sha256":"88c3f624d713e6d515a7fdf4b4e3645324f4fbf602aafb649fa7add11fb5876c","schema_version":"1.0","event_id":"sha256:88c3f624d713e6d515a7fdf4b4e3645324f4fbf602aafb649fa7add11fb5876c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/bundle.json","state_url":"https://pith.science/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-15T10:41:38Z","links":{"resolver":"https://pith.science/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7","bundle":"https://pith.science/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/bundle.json","state":"https://pith.science/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DQHI2CQOL4XSZLZVM5LQVPUDF7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:DQHI2CQOL4XSZLZVM5LQVPUDF7","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b9942e5111494f8a1cd8eff637a098010c6e94af70a13e2f2b06770860b15212","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-02T14:42:14Z","title_canon_sha256":"2744e984f97dcb84c901ded4693115afe8c3a63d76cf596d8e5c5697978b4120"},"schema_version":"1.0","source":{"id":"1908.00889","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.00889","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"arxiv_version","alias_value":"1908.00889v4","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.00889","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_12","alias_value":"DQHI2CQOL4XS","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_16","alias_value":"DQHI2CQOL4XSZLZV","created_at":"2026-07-05T00:55:03Z"},{"alias_kind":"pith_short_8","alias_value":"DQHI2CQO","created_at":"2026-07-05T00:55:03Z"}],"graph_snapshots":[{"event_id":"sha256:88c3f624d713e6d515a7fdf4b4e3645324f4fbf602aafb649fa7add11fb5876c","target":"graph","created_at":"2026-07-05T00:55:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.00889/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The detection of GW170817 is revolutionizing many areas of astrophysics with the joint observation of gravitational waves and electromagnetic emissions. These multi-messenger events provide a new approach to determine the Hubble constant, thus, they are a promising candidate for mitigating the tension between measurements of Type Ia supernovae via the local distance ladder and the Cosmic Microwave Background. In addition to the \"standard siren\" provided by the gravitational-wave measurement, the kilonova itself has characteristics that allow to improve existing measurements or to perform yet a","authors_text":"David A. Coulter, Jack Heinzel, Mattia Bulla, Michael W. Coughlin, Nandita Khetan, Nelson Christensen, Ryan J. Foley, Sarah Antier, Tim Dietrich","cross_cats":["astro-ph.CO","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-02T14:42:14Z","title":"On standardizing kilonovae and their use as standard candles to measure the Hubble constant"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.00889","kind":"arxiv","version":4},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0618fb900cbb6b9ed22a8f976e78799b04447b288bec954dc19544b6b18e7fd0","target":"record","created_at":"2026-07-05T00:55:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b9942e5111494f8a1cd8eff637a098010c6e94af70a13e2f2b06770860b15212","cross_cats_sorted":["astro-ph.CO","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2019-08-02T14:42:14Z","title_canon_sha256":"2744e984f97dcb84c901ded4693115afe8c3a63d76cf596d8e5c5697978b4120"},"schema_version":"1.0","source":{"id":"1908.00889","kind":"arxiv","version":4}},"canonical_sha256":"1c0e8d0a0e5f2f2caf3567570abe832fc8e659a9fb1e6a4d4e190138d075772d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1c0e8d0a0e5f2f2caf3567570abe832fc8e659a9fb1e6a4d4e190138d075772d","first_computed_at":"2026-07-05T00:55:03.028256Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:55:03.028256Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GGLFG8foVBNjywaY54+qWe2heX5q7YiTka99VoF3+q907pR/1DjW1FnQS9Me3tsgLzPVViXId9wte+xmpUyBCw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:55:03.028675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.00889","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0618fb900cbb6b9ed22a8f976e78799b04447b288bec954dc19544b6b18e7fd0","sha256:88c3f624d713e6d515a7fdf4b4e3645324f4fbf602aafb649fa7add11fb5876c"],"state_sha256":"e73737ff0af23cd1f1e66cc427072b5e9874191242231748c96600733a8af2b4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jkP7GdRHHR7bQ+/BeAgfueASeqw2PsWUzO9GQyYSoR0dxGYCZPd9Iidu65a8ysmJI4lzN6+MaDm0DzSfk1QqAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T10:41:38.014186Z","bundle_sha256":"ca0590c68d380f22731c7b3cb0585f27dbd66f29ba18c801a31c9d6b0b62a017"}}