{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:KOH6FJWF2225GE45QO7YUN57EV","short_pith_number":"pith:KOH6FJWF","canonical_record":{"source":{"id":"1604.02513","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-04-09T02:33:57Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"aab307cc8780afbaaf0b3d45d67e46e28f788cef96fadc597503947a0532a1a2","abstract_canon_sha256":"9e76d85ade5d34afca7492a3b87f7cebd90816354c6c174bc2eeddf0f2848b38"},"schema_version":"1.0"},"canonical_sha256":"538fe2a6c5d6b5d3139d83bf8a37bf2557471900ce0b18ad7041a085cf4cdabb","source":{"kind":"arxiv","id":"1604.02513","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02513","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02513v2","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02513","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"KOH6FJWF2225","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KOH6FJWF2225GE45","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KOH6FJWF","created_at":"2026-05-18T12:30:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:KOH6FJWF2225GE45QO7YUN57EV","target":"record","payload":{"canonical_record":{"source":{"id":"1604.02513","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-04-09T02:33:57Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"aab307cc8780afbaaf0b3d45d67e46e28f788cef96fadc597503947a0532a1a2","abstract_canon_sha256":"9e76d85ade5d34afca7492a3b87f7cebd90816354c6c174bc2eeddf0f2848b38"},"schema_version":"1.0"},"canonical_sha256":"538fe2a6c5d6b5d3139d83bf8a37bf2557471900ce0b18ad7041a085cf4cdabb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:45.274004Z","signature_b64":"6UtsnLFXJH8bWDTQS+24zp14zmljx0G3TbPer+RnEX2rrk92vKA6qZ8yzaWqa9CgQCv3kv+f46K+x8oc73vnCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"538fe2a6c5d6b5d3139d83bf8a37bf2557471900ce0b18ad7041a085cf4cdabb","last_reissued_at":"2026-05-18T01:08:45.273593Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:45.273593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.02513","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":"2026-05-18T01:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wC8vi/safvw7k2Tn2aeomvOIZdQMevs0dioxOgSy/WjzqeRLBhig/XEtJI8sb3MHriwZFenc2IqaITza2ircBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:59:32.005637Z"},"content_sha256":"2f514c059c3479885b0c2ab6a33c573f6ab34e50b069e137150fe2a70ecf3a80","schema_version":"1.0","event_id":"sha256:2f514c059c3479885b0c2ab6a33c573f6ab34e50b069e137150fe2a70ecf3a80"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:KOH6FJWF2225GE45QO7YUN57EV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Limits of Astrophysics with Gravitational-Wave Backgrounds","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"Eric Thrane, Ilya Mandel, Letizia Sammut, Shi Qiu, Thomas Callister","submitted_at":"2016-04-09T02:33:57Z","abstract_excerpt":"The recent Advanced LIGO detection of gravitational waves from the binary black hole GW150914 suggests there exists a large population of merging binary black holes in the Universe. Although most are too distant to be individually resolved by advanced detectors, the superposition of gravitational waves from many unresolvable binaries is expected to create an astrophysical stochastic background. Recent results from the LIGO and Virgo collaborations show that this astrophysical background is within reach of Advanced LIGO. In principle, the binary black hole background encodes interesting astroph"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02513","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":"2026-05-18T01:08:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kdbkPJPG8PY6TeBB4pmnwBE0wvk4KVDyIiYSdvqiIFr36GsuLllueIyHoN+XZCC17dFsxlKXTuZ2L8RLim5ZDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:59:32.005987Z"},"content_sha256":"8072b30c0db8db10df24ff6999ce26be5751b04ca304ad162b9628b826ddbd3e","schema_version":"1.0","event_id":"sha256:8072b30c0db8db10df24ff6999ce26be5751b04ca304ad162b9628b826ddbd3e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KOH6FJWF2225GE45QO7YUN57EV/bundle.json","state_url":"https://pith.science/pith/KOH6FJWF2225GE45QO7YUN57EV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KOH6FJWF2225GE45QO7YUN57EV/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":"2026-05-28T17:59:32Z","links":{"resolver":"https://pith.science/pith/KOH6FJWF2225GE45QO7YUN57EV","bundle":"https://pith.science/pith/KOH6FJWF2225GE45QO7YUN57EV/bundle.json","state":"https://pith.science/pith/KOH6FJWF2225GE45QO7YUN57EV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KOH6FJWF2225GE45QO7YUN57EV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:KOH6FJWF2225GE45QO7YUN57EV","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":"9e76d85ade5d34afca7492a3b87f7cebd90816354c6c174bc2eeddf0f2848b38","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-04-09T02:33:57Z","title_canon_sha256":"aab307cc8780afbaaf0b3d45d67e46e28f788cef96fadc597503947a0532a1a2"},"schema_version":"1.0","source":{"id":"1604.02513","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02513","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02513v2","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02513","created_at":"2026-05-18T01:08:45Z"},{"alias_kind":"pith_short_12","alias_value":"KOH6FJWF2225","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"KOH6FJWF2225GE45","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"KOH6FJWF","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:8072b30c0db8db10df24ff6999ce26be5751b04ca304ad162b9628b826ddbd3e","target":"graph","created_at":"2026-05-18T01:08:45Z","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":"The recent Advanced LIGO detection of gravitational waves from the binary black hole GW150914 suggests there exists a large population of merging binary black holes in the Universe. Although most are too distant to be individually resolved by advanced detectors, the superposition of gravitational waves from many unresolvable binaries is expected to create an astrophysical stochastic background. Recent results from the LIGO and Virgo collaborations show that this astrophysical background is within reach of Advanced LIGO. In principle, the binary black hole background encodes interesting astroph","authors_text":"Eric Thrane, Ilya Mandel, Letizia Sammut, Shi Qiu, Thomas Callister","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-04-09T02:33:57Z","title":"Limits of Astrophysics with Gravitational-Wave Backgrounds"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02513","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":"sha256:2f514c059c3479885b0c2ab6a33c573f6ab34e50b069e137150fe2a70ecf3a80","target":"record","created_at":"2026-05-18T01:08:45Z","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":"9e76d85ade5d34afca7492a3b87f7cebd90816354c6c174bc2eeddf0f2848b38","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-04-09T02:33:57Z","title_canon_sha256":"aab307cc8780afbaaf0b3d45d67e46e28f788cef96fadc597503947a0532a1a2"},"schema_version":"1.0","source":{"id":"1604.02513","kind":"arxiv","version":2}},"canonical_sha256":"538fe2a6c5d6b5d3139d83bf8a37bf2557471900ce0b18ad7041a085cf4cdabb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"538fe2a6c5d6b5d3139d83bf8a37bf2557471900ce0b18ad7041a085cf4cdabb","first_computed_at":"2026-05-18T01:08:45.273593Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:45.273593Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6UtsnLFXJH8bWDTQS+24zp14zmljx0G3TbPer+RnEX2rrk92vKA6qZ8yzaWqa9CgQCv3kv+f46K+x8oc73vnCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:45.274004Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.02513","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2f514c059c3479885b0c2ab6a33c573f6ab34e50b069e137150fe2a70ecf3a80","sha256:8072b30c0db8db10df24ff6999ce26be5751b04ca304ad162b9628b826ddbd3e"],"state_sha256":"a2111ec8cedf498f07f2da40a38ea3fa39975c0527a512146bc05ceb1bcbc3bf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"38pdtyGBIyEVFnoQ3Ysmx8qdqjDJfjSSBlHMUMrAApJ0caj9A/vJ7sF60LuSFg433vDnXb8NKqBTxjY0fsy4BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T17:59:32.008135Z","bundle_sha256":"f32d0d5d14b6326db8999a9b97e2c2b58bf8235bc29355897969002b7499c870"}}