{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WFH7GTS3Q63ENL2NEK6URRIXN3","short_pith_number":"pith:WFH7GTS3","canonical_record":{"source":{"id":"1801.03531","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-10T19:38:47Z","cross_cats_sorted":[],"title_canon_sha256":"a721fc4f6efb1a2f1d6be6cb398791ccd103ac461814045b3f3546e4fbb989e9","abstract_canon_sha256":"96801bdf087479d09aae49826014ec0774284880f7baff0dbceeb30a17665e55"},"schema_version":"1.0"},"canonical_sha256":"b14ff34e5b87b646af4d22bd48c5176ee2bdc2af30bd2c70d7146d0a9165aa6f","source":{"kind":"arxiv","id":"1801.03531","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03531","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03531v2","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03531","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"pith_short_12","alias_value":"WFH7GTS3Q63E","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WFH7GTS3Q63ENL2N","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WFH7GTS3","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WFH7GTS3Q63ENL2NEK6URRIXN3","target":"record","payload":{"canonical_record":{"source":{"id":"1801.03531","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-10T19:38:47Z","cross_cats_sorted":[],"title_canon_sha256":"a721fc4f6efb1a2f1d6be6cb398791ccd103ac461814045b3f3546e4fbb989e9","abstract_canon_sha256":"96801bdf087479d09aae49826014ec0774284880f7baff0dbceeb30a17665e55"},"schema_version":"1.0"},"canonical_sha256":"b14ff34e5b87b646af4d22bd48c5176ee2bdc2af30bd2c70d7146d0a9165aa6f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:18:52.370988Z","signature_b64":"pWZdyN3RVUqqVRSn1S/cQ1KjV6CyOsn7QVha6mK8w2ALkGcJo9oMfesWCXvanLy9G6Zmy3mdI6ehcX/R9zl3BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b14ff34e5b87b646af4d22bd48c5176ee2bdc2af30bd2c70d7146d0a9165aa6f","last_reissued_at":"2026-05-18T00:18:52.370435Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:18:52.370435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.03531","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":"2026-05-18T00:18:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z1USGi87XSArq61VnfCmu333xnhLNCYdotSHkDf3DxBD4bzfXbBopQH44shY0sQe7x1EneCDnlTRSry7+pLUAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:44:11.393948Z"},"content_sha256":"97e6130ef99478667e1deb52116d1f361127b4702606315ec8307bc84a893ee2","schema_version":"1.0","event_id":"sha256:97e6130ef99478667e1deb52116d1f361127b4702606315ec8307bc84a893ee2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WFH7GTS3Q63ENL2NEK6URRIXN3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Binary Neutron Star event LIGO/VIRGO GW170817 a hundred and sixty days after merger: synchrotron emission across the electromagnetic spectrum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Hajela, A. Kathirgamaraju, A. MacFadyen, B.D. Metzger, C. Guidorzi, D. Giannios, E. Berger, J. Zrake, K.D. Alexander, L. Sironi, M. Nicholl, P.K. Blanchard, P.K.G. Williams, P.S. Cowperthwaite, Raffaella Margutti, R. Chornock, T. Eftekhari, V.A. Villar, W. Fong, x. Xie","submitted_at":"2018-01-10T19:38:47Z","abstract_excerpt":"We report deep Chandra, HST and VLA observations of the binary neutron star event GW170817 at $t<160$ d after merger. These observations show that GW170817 has been steadily brightening with time and might have now reached its peak, and constrain the emission process as non-thermal synchrotron emission where the cooling frequency $\\nu_c$ is above the X-ray band and the synchrotron frequency $\\nu_m$ is below the radio band. The very simple power-law spectrum extending for eight orders of magnitude in frequency enables the most precise measurement of the index $p$ of the distribution of non-ther"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03531","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":"2026-05-18T00:18:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VNRCmAjs8cq/OrjAyDzDEsShpUgFKGrR+74rXT5bmsU0v0J/KCwiWPIBD/icWLgrK7c7Rw9FAOZS245B5bLWCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:44:11.394565Z"},"content_sha256":"19a5804b7dfd58e39a8fb3f201927c9a63244c5202cde5d1dc08f34fc1b7db70","schema_version":"1.0","event_id":"sha256:19a5804b7dfd58e39a8fb3f201927c9a63244c5202cde5d1dc08f34fc1b7db70"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/bundle.json","state_url":"https://pith.science/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/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":"2026-05-25T23:44:11Z","links":{"resolver":"https://pith.science/pith/WFH7GTS3Q63ENL2NEK6URRIXN3","bundle":"https://pith.science/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/bundle.json","state":"https://pith.science/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WFH7GTS3Q63ENL2NEK6URRIXN3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WFH7GTS3Q63ENL2NEK6URRIXN3","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":"96801bdf087479d09aae49826014ec0774284880f7baff0dbceeb30a17665e55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-10T19:38:47Z","title_canon_sha256":"a721fc4f6efb1a2f1d6be6cb398791ccd103ac461814045b3f3546e4fbb989e9"},"schema_version":"1.0","source":{"id":"1801.03531","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.03531","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"arxiv_version","alias_value":"1801.03531v2","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.03531","created_at":"2026-05-18T00:18:52Z"},{"alias_kind":"pith_short_12","alias_value":"WFH7GTS3Q63E","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WFH7GTS3Q63ENL2N","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WFH7GTS3","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:19a5804b7dfd58e39a8fb3f201927c9a63244c5202cde5d1dc08f34fc1b7db70","target":"graph","created_at":"2026-05-18T00:18:52Z","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 report deep Chandra, HST and VLA observations of the binary neutron star event GW170817 at $t<160$ d after merger. These observations show that GW170817 has been steadily brightening with time and might have now reached its peak, and constrain the emission process as non-thermal synchrotron emission where the cooling frequency $\\nu_c$ is above the X-ray band and the synchrotron frequency $\\nu_m$ is below the radio band. The very simple power-law spectrum extending for eight orders of magnitude in frequency enables the most precise measurement of the index $p$ of the distribution of non-ther","authors_text":"A. Hajela, A. Kathirgamaraju, A. MacFadyen, B.D. Metzger, C. Guidorzi, D. Giannios, E. Berger, J. Zrake, K.D. Alexander, L. Sironi, M. Nicholl, P.K. Blanchard, P.K.G. Williams, P.S. Cowperthwaite, Raffaella Margutti, R. Chornock, T. Eftekhari, V.A. Villar, W. Fong, x. Xie","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-10T19:38:47Z","title":"The Binary Neutron Star event LIGO/VIRGO GW170817 a hundred and sixty days after merger: synchrotron emission across the electromagnetic spectrum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.03531","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":"sha256:97e6130ef99478667e1deb52116d1f361127b4702606315ec8307bc84a893ee2","target":"record","created_at":"2026-05-18T00:18:52Z","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":"96801bdf087479d09aae49826014ec0774284880f7baff0dbceeb30a17665e55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-01-10T19:38:47Z","title_canon_sha256":"a721fc4f6efb1a2f1d6be6cb398791ccd103ac461814045b3f3546e4fbb989e9"},"schema_version":"1.0","source":{"id":"1801.03531","kind":"arxiv","version":2}},"canonical_sha256":"b14ff34e5b87b646af4d22bd48c5176ee2bdc2af30bd2c70d7146d0a9165aa6f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b14ff34e5b87b646af4d22bd48c5176ee2bdc2af30bd2c70d7146d0a9165aa6f","first_computed_at":"2026-05-18T00:18:52.370435Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:18:52.370435Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pWZdyN3RVUqqVRSn1S/cQ1KjV6CyOsn7QVha6mK8w2ALkGcJo9oMfesWCXvanLy9G6Zmy3mdI6ehcX/R9zl3BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:18:52.370988Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.03531","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:97e6130ef99478667e1deb52116d1f361127b4702606315ec8307bc84a893ee2","sha256:19a5804b7dfd58e39a8fb3f201927c9a63244c5202cde5d1dc08f34fc1b7db70"],"state_sha256":"4be311bb16ab6f7d852b3fa8f69b22489ebb46d22795d32d75f7e11fbea251da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tjyeahW/girI5eWZXwQ6lo5CtBCaR7EeSaIlIMNIQ2Ua5cf0O3hU7l6XAPZ9w2PFXTZTdyYkPSZgfBb4tovGAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:44:11.398713Z","bundle_sha256":"216b6021fa9639c72c765eb65b58baf3ac5adb98457b525f470438f4cac90ce4"}}