{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QXAOI5X7O7OC7SUSYOMRANE2ZK","short_pith_number":"pith:QXAOI5X7","canonical_record":{"source":{"id":"1901.02674","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-01-09T11:00:38Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"773b70e1676d3642af7aa1df76b8b47489773ea7cdaf00390d2949201cba75b1","abstract_canon_sha256":"73d847ecb5af54adb26a70f08402254086098dd8b3deed8682a49437e3800bda"},"schema_version":"1.0"},"canonical_sha256":"85c0e476ff77dc2fca92c39910349aca91172c30e9cd7d7e2d827f79e635323c","source":{"kind":"arxiv","id":"1901.02674","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02674","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02674v2","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02674","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"QXAOI5X7O7OC","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QXAOI5X7O7OC7SUS","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QXAOI5X7","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QXAOI5X7O7OC7SUSYOMRANE2ZK","target":"record","payload":{"canonical_record":{"source":{"id":"1901.02674","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-01-09T11:00:38Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"773b70e1676d3642af7aa1df76b8b47489773ea7cdaf00390d2949201cba75b1","abstract_canon_sha256":"73d847ecb5af54adb26a70f08402254086098dd8b3deed8682a49437e3800bda"},"schema_version":"1.0"},"canonical_sha256":"85c0e476ff77dc2fca92c39910349aca91172c30e9cd7d7e2d827f79e635323c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:37.814063Z","signature_b64":"feqXtqh+C3SeGl6yJADDX435Dxv6Og39hc7gQYBJo9wyCRGw/ofh7ge2xfK4LNziMQD/veJUB+BFzQxkBVGyBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85c0e476ff77dc2fca92c39910349aca91172c30e9cd7d7e2d827f79e635323c","last_reissued_at":"2026-05-17T23:44:37.813592Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:37.813592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.02674","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HbdWSZUIxaYD0dOwn5uhPQ951hYL/QRal7VqMckaelHfwWlRHY6gjmM63O/hbYkV40TmUYZ3h2+2qvf/Ct0vCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:25:21.990476Z"},"content_sha256":"edd602b77ee5abbc238a9c36143073e1459a5028ac98be08d8200063d9c56ec8","schema_version":"1.0","event_id":"sha256:edd602b77ee5abbc238a9c36143073e1459a5028ac98be08d8200063d9c56ec8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QXAOI5X7O7OC7SUSYOMRANE2ZK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Search for gravitational lensing signatures in LIGO-Virgo binary black hole events","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"gr-qc","authors_text":"A.K. Mehta, D. Keitel, K. Haris, K.K.Y. Ng, O.A. Hannuksela, P. Ajith, S. Kumar, T.G.F. Li","submitted_at":"2019-01-09T11:00:38Z","abstract_excerpt":"We search for signatures of gravitational lensing in the binary black hole events detected by Advanced LIGO and Virgo during their first two observational runs. In particular, we look for three effects: 1) evidence of lensing magnification in the individual signals due to galaxy lenses, 2) evidence of multiple images due to strong lensing by galaxies, 3) evidence of wave optics effects due to point-mass lenses. We find no compelling evidence of any of these signatures in the observed gravitational wave signals. However, as the sensitivities of gravitational wave detectors improve in the future"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02674","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-17T23:44:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1HpIR3Aj+ubfe++nIcPKq6BDvloSZ/Q5omum2wVjvOVjxYMtSctUbdoD3RhlmAOGQJRD7/jRWjhUYNZqn1gFBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T10:25:21.991137Z"},"content_sha256":"a5d450f8e15ebcd0cf29d015be949ed2cbc0880a52e71eec1eae16f4c345eb04","schema_version":"1.0","event_id":"sha256:a5d450f8e15ebcd0cf29d015be949ed2cbc0880a52e71eec1eae16f4c345eb04"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/bundle.json","state_url":"https://pith.science/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/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":"2026-05-31T10:25:21Z","links":{"resolver":"https://pith.science/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK","bundle":"https://pith.science/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/bundle.json","state":"https://pith.science/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QXAOI5X7O7OC7SUSYOMRANE2ZK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QXAOI5X7O7OC7SUSYOMRANE2ZK","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":"73d847ecb5af54adb26a70f08402254086098dd8b3deed8682a49437e3800bda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-01-09T11:00:38Z","title_canon_sha256":"773b70e1676d3642af7aa1df76b8b47489773ea7cdaf00390d2949201cba75b1"},"schema_version":"1.0","source":{"id":"1901.02674","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02674","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02674v2","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02674","created_at":"2026-05-17T23:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"QXAOI5X7O7OC","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QXAOI5X7O7OC7SUS","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QXAOI5X7","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:a5d450f8e15ebcd0cf29d015be949ed2cbc0880a52e71eec1eae16f4c345eb04","target":"graph","created_at":"2026-05-17T23:44:37Z","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"},"paper":{"abstract_excerpt":"We search for signatures of gravitational lensing in the binary black hole events detected by Advanced LIGO and Virgo during their first two observational runs. In particular, we look for three effects: 1) evidence of lensing magnification in the individual signals due to galaxy lenses, 2) evidence of multiple images due to strong lensing by galaxies, 3) evidence of wave optics effects due to point-mass lenses. We find no compelling evidence of any of these signatures in the observed gravitational wave signals. However, as the sensitivities of gravitational wave detectors improve in the future","authors_text":"A.K. Mehta, D. Keitel, K. Haris, K.K.Y. Ng, O.A. Hannuksela, P. Ajith, S. Kumar, T.G.F. Li","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-01-09T11:00:38Z","title":"Search for gravitational lensing signatures in LIGO-Virgo binary black hole events"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02674","kind":"arxiv","version":2},"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:edd602b77ee5abbc238a9c36143073e1459a5028ac98be08d8200063d9c56ec8","target":"record","created_at":"2026-05-17T23:44:37Z","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":"73d847ecb5af54adb26a70f08402254086098dd8b3deed8682a49437e3800bda","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-01-09T11:00:38Z","title_canon_sha256":"773b70e1676d3642af7aa1df76b8b47489773ea7cdaf00390d2949201cba75b1"},"schema_version":"1.0","source":{"id":"1901.02674","kind":"arxiv","version":2}},"canonical_sha256":"85c0e476ff77dc2fca92c39910349aca91172c30e9cd7d7e2d827f79e635323c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85c0e476ff77dc2fca92c39910349aca91172c30e9cd7d7e2d827f79e635323c","first_computed_at":"2026-05-17T23:44:37.813592Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:37.813592Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"feqXtqh+C3SeGl6yJADDX435Dxv6Og39hc7gQYBJo9wyCRGw/ofh7ge2xfK4LNziMQD/veJUB+BFzQxkBVGyBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:37.814063Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.02674","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edd602b77ee5abbc238a9c36143073e1459a5028ac98be08d8200063d9c56ec8","sha256:a5d450f8e15ebcd0cf29d015be949ed2cbc0880a52e71eec1eae16f4c345eb04"],"state_sha256":"df02d871f89ba7c32c2c2e8be64d875aa81b49f6641f01e3e6c30f3b0efd037b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8G3SBeq8HQGGvhrcybc9gMnY6+70Bvlv2AVRUjjJ8QW2QgBg5xVzu4g4XQhf8guJ/iQSUCioNayiQEC4ADMAAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T10:25:21.994305Z","bundle_sha256":"a28d9acdbefcddd5c260e60bbfd347c0012d094b0464ce5b2612de63c5841105"}}