{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:ZW3HHLXD3KP447FQRIESZFPS36","short_pith_number":"pith:ZW3HHLXD","canonical_record":{"source":{"id":"2507.08778","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-11T17:41:30Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"708962b9c13cebd08a4c0bc9604b952f63859b72618c5ca1c3fcf2f4f60d2bcc","abstract_canon_sha256":"40f7d971e6d82ae40450cbbf14d553e67a7cf4aafa3644129ae38b7d3c3b428a"},"schema_version":"1.0"},"canonical_sha256":"cdb673aee3da9fce7cb08a092c95f2df8a7e7ea4ec923a526c6c77fd126dd4d6","source":{"kind":"arxiv","id":"2507.08778","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.08778","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"arxiv_version","alias_value":"2507.08778v1","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.08778","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_12","alias_value":"ZW3HHLXD3KP4","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_16","alias_value":"ZW3HHLXD3KP447FQ","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_8","alias_value":"ZW3HHLXD","created_at":"2026-07-05T11:35:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:ZW3HHLXD3KP447FQRIESZFPS36","target":"record","payload":{"canonical_record":{"source":{"id":"2507.08778","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-11T17:41:30Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"708962b9c13cebd08a4c0bc9604b952f63859b72618c5ca1c3fcf2f4f60d2bcc","abstract_canon_sha256":"40f7d971e6d82ae40450cbbf14d553e67a7cf4aafa3644129ae38b7d3c3b428a"},"schema_version":"1.0"},"canonical_sha256":"cdb673aee3da9fce7cb08a092c95f2df8a7e7ea4ec923a526c6c77fd126dd4d6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:35:46.338910Z","signature_b64":"6R2+CXqsIN+udZf0uNWhP12DSod7SSTuHiypz3e5yZPXQMTLU9HjP5cHFKT475/rBJ7Dx6U+n0E8C7jev52bDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cdb673aee3da9fce7cb08a092c95f2df8a7e7ea4ec923a526c6c77fd126dd4d6","last_reissued_at":"2026-07-05T11:35:46.338473Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:35:46.338473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2507.08778","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:35:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"X0xryuHvHD1LL6j2n+dXZQt09Jkpucq3Z5YmUyt/VJfMpruTSQ7C6IXwOI/JUmgQoLYYoJDcUPcbHfqsIxYlBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-29T13:33:21.261233Z"},"content_sha256":"cda341fe79183d8ce16deac8869611b2dbea2ff653f12aaaf0c51e996ee8351a","schema_version":"1.0","event_id":"sha256:cda341fe79183d8ce16deac8869611b2dbea2ff653f12aaaf0c51e996ee8351a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:ZW3HHLXD3KP447FQRIESZFPS36","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mining the Alerts: A Preliminary Catalog of Compact Binaries from the Fourth Observing Run","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"astro-ph.HE","authors_text":"Alexander H. Nitz, Alex Correia, Aleyna Aky\\\"uz, Collin D. Capano, Hung Tan, Jada Garofalo, Kanchan Soni, Keisi Kacanja, Labani Roy, Vikas Jadhav Y","submitted_at":"2025-07-11T17:41:30Z","abstract_excerpt":"We present a preliminary catalog of compact binary merger candidates from the ongoing fourth observing run (O4) of Advanced LIGO, Virgo, and KAGRA, based on an analysis of public alerts distributed through GraceDB as of May 2025. We developed and applied methods to estimate the source-frame chirp mass for each candidate by utilizing information from public data products, including source classification probabilities, sky localizations, and observatory status. Combining our O4 analysis with previous catalogs, we provide updated estimates for the local merger rate density. For sources with chirp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.08778","kind":"arxiv","version":1},"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/2507.08778/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":"2026-07-05T11:35:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nVW80ccNkg9/j8jiMXrB/MjZYRHhCdHuOsGHWOskjJNnVN+5XhY2cbvTuUKPATgAfsCZ6SJBWmRq4vfGTOIIDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-29T13:33:21.261625Z"},"content_sha256":"3fc65967c52d2b88f015642c8ac6f625fc45d989b0a05dad51102e799880ab81","schema_version":"1.0","event_id":"sha256:3fc65967c52d2b88f015642c8ac6f625fc45d989b0a05dad51102e799880ab81"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZW3HHLXD3KP447FQRIESZFPS36/bundle.json","state_url":"https://pith.science/pith/ZW3HHLXD3KP447FQRIESZFPS36/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZW3HHLXD3KP447FQRIESZFPS36/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":"2026-07-29T13:33:21Z","links":{"resolver":"https://pith.science/pith/ZW3HHLXD3KP447FQRIESZFPS36","bundle":"https://pith.science/pith/ZW3HHLXD3KP447FQRIESZFPS36/bundle.json","state":"https://pith.science/pith/ZW3HHLXD3KP447FQRIESZFPS36/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZW3HHLXD3KP447FQRIESZFPS36/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:ZW3HHLXD3KP447FQRIESZFPS36","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":"40f7d971e6d82ae40450cbbf14d553e67a7cf4aafa3644129ae38b7d3c3b428a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-11T17:41:30Z","title_canon_sha256":"708962b9c13cebd08a4c0bc9604b952f63859b72618c5ca1c3fcf2f4f60d2bcc"},"schema_version":"1.0","source":{"id":"2507.08778","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2507.08778","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"arxiv_version","alias_value":"2507.08778v1","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.08778","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_12","alias_value":"ZW3HHLXD3KP4","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_16","alias_value":"ZW3HHLXD3KP447FQ","created_at":"2026-07-05T11:35:46Z"},{"alias_kind":"pith_short_8","alias_value":"ZW3HHLXD","created_at":"2026-07-05T11:35:46Z"}],"graph_snapshots":[{"event_id":"sha256:3fc65967c52d2b88f015642c8ac6f625fc45d989b0a05dad51102e799880ab81","target":"graph","created_at":"2026-07-05T11:35:46Z","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/2507.08778/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a preliminary catalog of compact binary merger candidates from the ongoing fourth observing run (O4) of Advanced LIGO, Virgo, and KAGRA, based on an analysis of public alerts distributed through GraceDB as of May 2025. We developed and applied methods to estimate the source-frame chirp mass for each candidate by utilizing information from public data products, including source classification probabilities, sky localizations, and observatory status. Combining our O4 analysis with previous catalogs, we provide updated estimates for the local merger rate density. For sources with chirp","authors_text":"Alexander H. Nitz, Alex Correia, Aleyna Aky\\\"uz, Collin D. Capano, Hung Tan, Jada Garofalo, Kanchan Soni, Keisi Kacanja, Labani Roy, Vikas Jadhav Y","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-11T17:41:30Z","title":"Mining the Alerts: A Preliminary Catalog of Compact Binaries from the Fourth Observing Run"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.08778","kind":"arxiv","version":1},"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:cda341fe79183d8ce16deac8869611b2dbea2ff653f12aaaf0c51e996ee8351a","target":"record","created_at":"2026-07-05T11:35:46Z","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":"40f7d971e6d82ae40450cbbf14d553e67a7cf4aafa3644129ae38b7d3c3b428a","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-07-11T17:41:30Z","title_canon_sha256":"708962b9c13cebd08a4c0bc9604b952f63859b72618c5ca1c3fcf2f4f60d2bcc"},"schema_version":"1.0","source":{"id":"2507.08778","kind":"arxiv","version":1}},"canonical_sha256":"cdb673aee3da9fce7cb08a092c95f2df8a7e7ea4ec923a526c6c77fd126dd4d6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cdb673aee3da9fce7cb08a092c95f2df8a7e7ea4ec923a526c6c77fd126dd4d6","first_computed_at":"2026-07-05T11:35:46.338473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:35:46.338473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6R2+CXqsIN+udZf0uNWhP12DSod7SSTuHiypz3e5yZPXQMTLU9HjP5cHFKT475/rBJ7Dx6U+n0E8C7jev52bDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T11:35:46.338910Z","signed_message":"canonical_sha256_bytes"},"source_id":"2507.08778","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cda341fe79183d8ce16deac8869611b2dbea2ff653f12aaaf0c51e996ee8351a","sha256:3fc65967c52d2b88f015642c8ac6f625fc45d989b0a05dad51102e799880ab81"],"state_sha256":"376ecc03c43a92bc936b2e7321a0d0b0ec6ec0611b9c11371bce89d0b979f701"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l3XQYVVlYcGRc02NWwmlMLZfKQd1mMgAIZ4sI75le/r+L4GSkYxd2zmf08rPixcp4REhHMs66LJi5APb3wzgBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-29T13:33:21.264170Z","bundle_sha256":"b1b9133326cb00d9fa64ae174aa5e3a1dd99907c3201b1b609ceeeab0ff5d24c"}}