{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:X34ABNDFCGFGMT5OTS7U4LXAXW","short_pith_number":"pith:X34ABNDF","canonical_record":{"source":{"id":"1602.03847","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-11T19:26:54Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"9d30eb0f50b474b7bade47eb68c89191f415ff1b0c541d46d04522d2de706bbc","abstract_canon_sha256":"544d042f7b5943f519df398de6c2c67893d351a5027a49803b4f0d2931ee50ef"},"schema_version":"1.0"},"canonical_sha256":"bef800b465118a664fae9cbf4e2ee0bd93d91a37b308e9be1dc37d637d576b20","source":{"kind":"arxiv","id":"1602.03847","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.03847","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"arxiv_version","alias_value":"1602.03847v2","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.03847","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"pith_short_12","alias_value":"X34ABNDFCGFG","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"X34ABNDFCGFGMT5O","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"X34ABNDF","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:X34ABNDFCGFGMT5OTS7U4LXAXW","target":"record","payload":{"canonical_record":{"source":{"id":"1602.03847","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-11T19:26:54Z","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"title_canon_sha256":"9d30eb0f50b474b7bade47eb68c89191f415ff1b0c541d46d04522d2de706bbc","abstract_canon_sha256":"544d042f7b5943f519df398de6c2c67893d351a5027a49803b4f0d2931ee50ef"},"schema_version":"1.0"},"canonical_sha256":"bef800b465118a664fae9cbf4e2ee0bd93d91a37b308e9be1dc37d637d576b20","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:41.469501Z","signature_b64":"6MqA8484OGHAb5UjwWclTlzgYFsol5YR9Hxm6M53eVIT2hdTYwDkMEnkUeX8X08Os5vYUnIZp26f5l5mL16FBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bef800b465118a664fae9cbf4e2ee0bd93d91a37b308e9be1dc37d637d576b20","last_reissued_at":"2026-05-18T01:17:41.468770Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:41.468770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.03847","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":"2026-05-18T01:17:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A1NBT0Hh3mfMhaZW16fH0QeHxz93hKKCZFl7o7SblGjGXLBClhRtMeagdTPPVWR0kETcYJDXclsKiyJb3eoXAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T22:03:46.211638Z"},"content_sha256":"d07b39aab4dbf8fb6d932fda50cdb88bfd057e9d8b994f35ef2fbc04818ed8a9","schema_version":"1.0","event_id":"sha256:d07b39aab4dbf8fb6d932fda50cdb88bfd057e9d8b994f35ef2fbc04818ed8a9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:X34ABNDFCGFGMT5OTS7U4LXAXW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"GW150914: Implications for the stochastic gravitational wave background from binary black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.HE"],"primary_cat":"gr-qc","authors_text":"The LIGO Scientific Collaboration, the Virgo Collaboration","submitted_at":"2016-02-11T19:26:54Z","abstract_excerpt":"The LIGO detection of the gravitational wave transient GW150914, from the inspiral and merger of two black holes with masses $\\gtrsim 30\\, \\text{M}_\\odot$, suggests a population of binary black holes with relatively high mass. This observation implies that the stochastic gravitational-wave background from binary black holes, created from the incoherent superposition of all the merging binaries in the Universe, could be higher than previously expected. Using the properties of GW150914, we estimate the energy density of such a background from binary black holes. In the most sensitive part of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.03847","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":"2026-05-18T01:17:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OUUayf8WOR1uYeZQhCwAJpaIb6mM7t0yVHrz8SRtidvYnmIP/DjJLppEuRFjQ8QDyfPz92kRJwnHfmaKPDTwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T22:03:46.212282Z"},"content_sha256":"024d47aae75cfe59905618af9890fb8d2156a1db15010aad5fe874df29f40ec6","schema_version":"1.0","event_id":"sha256:024d47aae75cfe59905618af9890fb8d2156a1db15010aad5fe874df29f40ec6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/bundle.json","state_url":"https://pith.science/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/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":"2026-05-21T22:03:46Z","links":{"resolver":"https://pith.science/pith/X34ABNDFCGFGMT5OTS7U4LXAXW","bundle":"https://pith.science/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/bundle.json","state":"https://pith.science/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X34ABNDFCGFGMT5OTS7U4LXAXW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:X34ABNDFCGFGMT5OTS7U4LXAXW","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":"544d042f7b5943f519df398de6c2c67893d351a5027a49803b4f0d2931ee50ef","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-11T19:26:54Z","title_canon_sha256":"9d30eb0f50b474b7bade47eb68c89191f415ff1b0c541d46d04522d2de706bbc"},"schema_version":"1.0","source":{"id":"1602.03847","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.03847","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"arxiv_version","alias_value":"1602.03847v2","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.03847","created_at":"2026-05-18T01:17:41Z"},{"alias_kind":"pith_short_12","alias_value":"X34ABNDFCGFG","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"X34ABNDFCGFGMT5O","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"X34ABNDF","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:024d47aae75cfe59905618af9890fb8d2156a1db15010aad5fe874df29f40ec6","target":"graph","created_at":"2026-05-18T01:17:41Z","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 LIGO detection of the gravitational wave transient GW150914, from the inspiral and merger of two black holes with masses $\\gtrsim 30\\, \\text{M}_\\odot$, suggests a population of binary black holes with relatively high mass. This observation implies that the stochastic gravitational-wave background from binary black holes, created from the incoherent superposition of all the merging binaries in the Universe, could be higher than previously expected. Using the properties of GW150914, we estimate the energy density of such a background from binary black holes. In the most sensitive part of the","authors_text":"The LIGO Scientific Collaboration, the Virgo Collaboration","cross_cats":["astro-ph.CO","astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-11T19:26:54Z","title":"GW150914: Implications for the stochastic gravitational wave background from binary black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.03847","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:d07b39aab4dbf8fb6d932fda50cdb88bfd057e9d8b994f35ef2fbc04818ed8a9","target":"record","created_at":"2026-05-18T01:17:41Z","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":"544d042f7b5943f519df398de6c2c67893d351a5027a49803b4f0d2931ee50ef","cross_cats_sorted":["astro-ph.CO","astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-02-11T19:26:54Z","title_canon_sha256":"9d30eb0f50b474b7bade47eb68c89191f415ff1b0c541d46d04522d2de706bbc"},"schema_version":"1.0","source":{"id":"1602.03847","kind":"arxiv","version":2}},"canonical_sha256":"bef800b465118a664fae9cbf4e2ee0bd93d91a37b308e9be1dc37d637d576b20","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bef800b465118a664fae9cbf4e2ee0bd93d91a37b308e9be1dc37d637d576b20","first_computed_at":"2026-05-18T01:17:41.468770Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:41.468770Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6MqA8484OGHAb5UjwWclTlzgYFsol5YR9Hxm6M53eVIT2hdTYwDkMEnkUeX8X08Os5vYUnIZp26f5l5mL16FBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:41.469501Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.03847","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d07b39aab4dbf8fb6d932fda50cdb88bfd057e9d8b994f35ef2fbc04818ed8a9","sha256:024d47aae75cfe59905618af9890fb8d2156a1db15010aad5fe874df29f40ec6"],"state_sha256":"946cbe8830d9c687b0e7ac588a2a7b48feff45070b518a4c64f8f814c7f10c8c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+sWt0daoPL6xx7io8hjo/ezUMV8WDGBY0HOHVchzhsEOfYgEIjCWyvnvM1K2WSw3U5WnwUtacAMsHQK25Bx2AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T22:03:46.215449Z","bundle_sha256":"a319d12b578b42c4d23aa51dac881ee5ee927799da8ddb7e578315ea09db24d8"}}