{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ZRT47O3MBLUZ7WROM5ZXMOJJED","short_pith_number":"pith:ZRT47O3M","canonical_record":{"source":{"id":"1912.05389","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-12-11T15:30:42Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"f67e95dbc33298ee37561dffd27e68d74cf8247e1636c98ca7e383c9598625fb","abstract_canon_sha256":"855b36e7b512d711e01a51381783cfebdaaf82cae40bab87f5db01a8ecf7b828"},"schema_version":"1.0"},"canonical_sha256":"cc67cfbb6c0ae99fda2e677376392920e4513e3f598106bbff381194b4e80090","source":{"kind":"arxiv","id":"1912.05389","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.05389","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1912.05389v3","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.05389","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"ZRT47O3MBLUZ","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_16","alias_value":"ZRT47O3MBLUZ7WRO","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_8","alias_value":"ZRT47O3M","created_at":"2026-07-05T01:44:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ZRT47O3MBLUZ7WROM5ZXMOJJED","target":"record","payload":{"canonical_record":{"source":{"id":"1912.05389","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-12-11T15:30:42Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"f67e95dbc33298ee37561dffd27e68d74cf8247e1636c98ca7e383c9598625fb","abstract_canon_sha256":"855b36e7b512d711e01a51381783cfebdaaf82cae40bab87f5db01a8ecf7b828"},"schema_version":"1.0"},"canonical_sha256":"cc67cfbb6c0ae99fda2e677376392920e4513e3f598106bbff381194b4e80090","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:44:37.182554Z","signature_b64":"GxBwlWCGZvF75R1InBenr3YZ0r0Slr/st3K5PhC5ERjdSdt8iLNgRIg+W/knPtBXVil9BT7lNxxbCASjN4t7Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc67cfbb6c0ae99fda2e677376392920e4513e3f598106bbff381194b4e80090","last_reissued_at":"2026-07-05T01:44:37.182195Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:44:37.182195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.05389","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LN6lKvtXeXIDYoQ3hmCMohVOvbILvnf5sFQEX7JorRb/Xbj1b17MAH/j1KeU50T5y8fWNLu7BC7pyTqOvitXCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:41:16.524631Z"},"content_sha256":"d9edd2a15e6346c659ff055edea6eb8b92865181b91590f874e16b52521e11fc","schema_version":"1.0","event_id":"sha256:d9edd2a15e6346c659ff055edea6eb8b92865181b91590f874e16b52521e11fc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ZRT47O3MBLUZ7WROM5ZXMOJJED","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for strongly lensed counterpart images of binary black hole mergers in the first two LIGO observing runs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Connor McIsaac, David Bacon, David Keitel, Ian Harry, Oliver Edy, Simone Mozzon, Thomas Collett","submitted_at":"2019-12-11T15:30:42Z","abstract_excerpt":"Strong gravitational lensing can produce multiple images of the same gravitational-wave signal, each arriving at different times and with different magnification. Previous work has explored if lensed pairs exist among the known high-significance events and found no evidence of this. However, the possibility remains that weaker counterparts of these events are present in the data, unrecovered by previous searches. We conduct a targeted search specifically looking for sub-threshold lensed images of known binary black hole (BBH) observations. We recover candidates matching three of the additional"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.05389","kind":"arxiv","version":3},"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/1912.05389/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":"2026-07-05T01:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qYuUjko0xuHoBJPIjMpNUYVavIRY9LLSJ476ZuroB2T4MnDE3In82uSTyKm8xkN1dfnRbe5R4/QY3duD8vPlDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T20:41:16.525559Z"},"content_sha256":"98b2ab4e3274dac0524b7d7afc0cdd44af4bb21d34c7cf87a6de00977a37bc6f","schema_version":"1.0","event_id":"sha256:98b2ab4e3274dac0524b7d7afc0cdd44af4bb21d34c7cf87a6de00977a37bc6f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/bundle.json","state_url":"https://pith.science/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/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":"2026-08-11T20:41:16Z","links":{"resolver":"https://pith.science/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED","bundle":"https://pith.science/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/bundle.json","state":"https://pith.science/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZRT47O3MBLUZ7WROM5ZXMOJJED/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZRT47O3MBLUZ7WROM5ZXMOJJED","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":"855b36e7b512d711e01a51381783cfebdaaf82cae40bab87f5db01a8ecf7b828","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-12-11T15:30:42Z","title_canon_sha256":"f67e95dbc33298ee37561dffd27e68d74cf8247e1636c98ca7e383c9598625fb"},"schema_version":"1.0","source":{"id":"1912.05389","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.05389","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1912.05389v3","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.05389","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"ZRT47O3MBLUZ","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_16","alias_value":"ZRT47O3MBLUZ7WRO","created_at":"2026-07-05T01:44:37Z"},{"alias_kind":"pith_short_8","alias_value":"ZRT47O3M","created_at":"2026-07-05T01:44:37Z"}],"graph_snapshots":[{"event_id":"sha256:98b2ab4e3274dac0524b7d7afc0cdd44af4bb21d34c7cf87a6de00977a37bc6f","target":"graph","created_at":"2026-07-05T01:44:37Z","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/1912.05389/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Strong gravitational lensing can produce multiple images of the same gravitational-wave signal, each arriving at different times and with different magnification. Previous work has explored if lensed pairs exist among the known high-significance events and found no evidence of this. However, the possibility remains that weaker counterparts of these events are present in the data, unrecovered by previous searches. We conduct a targeted search specifically looking for sub-threshold lensed images of known binary black hole (BBH) observations. We recover candidates matching three of the additional","authors_text":"Connor McIsaac, David Bacon, David Keitel, Ian Harry, Oliver Edy, Simone Mozzon, Thomas Collett","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-12-11T15:30:42Z","title":"Search for strongly lensed counterpart images of binary black hole mergers in the first two LIGO observing runs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.05389","kind":"arxiv","version":3},"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:d9edd2a15e6346c659ff055edea6eb8b92865181b91590f874e16b52521e11fc","target":"record","created_at":"2026-07-05T01:44:37Z","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":"855b36e7b512d711e01a51381783cfebdaaf82cae40bab87f5db01a8ecf7b828","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-12-11T15:30:42Z","title_canon_sha256":"f67e95dbc33298ee37561dffd27e68d74cf8247e1636c98ca7e383c9598625fb"},"schema_version":"1.0","source":{"id":"1912.05389","kind":"arxiv","version":3}},"canonical_sha256":"cc67cfbb6c0ae99fda2e677376392920e4513e3f598106bbff381194b4e80090","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc67cfbb6c0ae99fda2e677376392920e4513e3f598106bbff381194b4e80090","first_computed_at":"2026-07-05T01:44:37.182195Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:44:37.182195Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GxBwlWCGZvF75R1InBenr3YZ0r0Slr/st3K5PhC5ERjdSdt8iLNgRIg+W/knPtBXVil9BT7lNxxbCASjN4t7Cg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:44:37.182554Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.05389","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d9edd2a15e6346c659ff055edea6eb8b92865181b91590f874e16b52521e11fc","sha256:98b2ab4e3274dac0524b7d7afc0cdd44af4bb21d34c7cf87a6de00977a37bc6f"],"state_sha256":"c7dd22b1f8502b6ab31557ed5948f2a63b8a5858dc6a225c69f63ce93eeb8e48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kp0c/Lfv1JFvi0KqPfhADirVZQiOZ3qkn2+/7y1ym0alS1qqx5OCGbDP99bd/MTItxbctU4fktB7+FoIQItvDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T20:41:16.531034Z","bundle_sha256":"1ede4ebb899b28f48763929d9ef753bab069db83ba56a501c2776808229dc93b"}}