{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:N5VIHETG3NZGWQSBQF6YFFF7FK","short_pith_number":"pith:N5VIHETG","canonical_record":{"source":{"id":"1503.07869","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-26T20:00:25Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"7eab3bac16a41952423a22c94882c407cbf072e09c54c396a4e7af3f8a401948","abstract_canon_sha256":"d56e879f4a06577676092648e0a3fa554aa798a69d467d1f6881f82bd28ec923"},"schema_version":"1.0"},"canonical_sha256":"6f6a839266db726b4241817d8294bf2aa62fff14d00e57499f952d39fbcf0fb2","source":{"kind":"arxiv","id":"1503.07869","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07869","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07869v1","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07869","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"pith_short_12","alias_value":"N5VIHETG3NZG","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"N5VIHETG3NZGWQSB","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"N5VIHETG","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:N5VIHETG3NZGWQSBQF6YFFF7FK","target":"record","payload":{"canonical_record":{"source":{"id":"1503.07869","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-26T20:00:25Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"7eab3bac16a41952423a22c94882c407cbf072e09c54c396a4e7af3f8a401948","abstract_canon_sha256":"d56e879f4a06577676092648e0a3fa554aa798a69d467d1f6881f82bd28ec923"},"schema_version":"1.0"},"canonical_sha256":"6f6a839266db726b4241817d8294bf2aa62fff14d00e57499f952d39fbcf0fb2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:30.863115Z","signature_b64":"Os2GWx9Pxg2vNZ0kUUju98ORk+ciQcLhTQjRSkjpY4vMblACHPkmvYjBYkrVDZ4X84wG9jPO24T+s/OqyzrpCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6f6a839266db726b4241817d8294bf2aa62fff14d00e57499f952d39fbcf0fb2","last_reissued_at":"2026-05-18T01:12:30.862796Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:30.862796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.07869","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:12:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HUB82X1WL0NY5/6+RXVql+wQ3aRDbR0gYwc7pfVfhOL20P3XKudsY/XjDdLrFRKRc3HLTwmG9gaVtRdn+AhoAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:12:15.213879Z"},"content_sha256":"b414c263a45f61e625294d486db9ce1335e278906e9cb0566ff6b0a99103b227","schema_version":"1.0","event_id":"sha256:b414c263a45f61e625294d486db9ce1335e278906e9cb0566ff6b0a99103b227"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:N5VIHETG3NZGWQSBQF6YFFF7FK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Comprehensive Study of Detectability and Contamination in Deep Rapid Optical Searches for Gravitational Wave Counterparts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.IM","authors_text":"E. Berger (Harvard University), P.S. Cowperthwaite (Harvard University)","submitted_at":"2015-03-26T20:00:25Z","abstract_excerpt":"The first direct detection of gravitational waves (GW) by the ground-based interferometers is expected to occur within the next few years. These interferometers will detect the mergers of compact object binaries composed of neutron stars and/or black holes to a fiducial distance of ~200 Mpc and a localization region of ~100 sq. deg. To maximize the science gains from such GW detections it is essential to identify electromagnetic (EM) counterparts. The most promising such counterpart is optical/IR emission powered by the radioactive decay of r-process elements synthesized in the neutron-rich me"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07869","kind":"arxiv","version":1},"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":"2026-05-18T01:12:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"P/GrImW3StG1vIDmtgHf2wBCfmQ9ISXJl3uvh3MWmeFoJp6np4LkzG1DU5EFgqESFtkaJK5xypsiEg+/HetXCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T10:12:15.214228Z"},"content_sha256":"f997b60ec00a75ca31940c14ce3db12614bdba53e64fced98cdcc18e44768724","schema_version":"1.0","event_id":"sha256:f997b60ec00a75ca31940c14ce3db12614bdba53e64fced98cdcc18e44768724"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/bundle.json","state_url":"https://pith.science/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/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":"2026-06-02T10:12:15Z","links":{"resolver":"https://pith.science/pith/N5VIHETG3NZGWQSBQF6YFFF7FK","bundle":"https://pith.science/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/bundle.json","state":"https://pith.science/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/N5VIHETG3NZGWQSBQF6YFFF7FK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:N5VIHETG3NZGWQSBQF6YFFF7FK","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":"d56e879f4a06577676092648e0a3fa554aa798a69d467d1f6881f82bd28ec923","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-26T20:00:25Z","title_canon_sha256":"7eab3bac16a41952423a22c94882c407cbf072e09c54c396a4e7af3f8a401948"},"schema_version":"1.0","source":{"id":"1503.07869","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.07869","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"arxiv_version","alias_value":"1503.07869v1","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.07869","created_at":"2026-05-18T01:12:30Z"},{"alias_kind":"pith_short_12","alias_value":"N5VIHETG3NZG","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"N5VIHETG3NZGWQSB","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"N5VIHETG","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:f997b60ec00a75ca31940c14ce3db12614bdba53e64fced98cdcc18e44768724","target":"graph","created_at":"2026-05-18T01:12:30Z","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 first direct detection of gravitational waves (GW) by the ground-based interferometers is expected to occur within the next few years. These interferometers will detect the mergers of compact object binaries composed of neutron stars and/or black holes to a fiducial distance of ~200 Mpc and a localization region of ~100 sq. deg. To maximize the science gains from such GW detections it is essential to identify electromagnetic (EM) counterparts. The most promising such counterpart is optical/IR emission powered by the radioactive decay of r-process elements synthesized in the neutron-rich me","authors_text":"E. Berger (Harvard University), P.S. Cowperthwaite (Harvard University)","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-26T20:00:25Z","title":"A Comprehensive Study of Detectability and Contamination in Deep Rapid Optical Searches for Gravitational Wave Counterparts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.07869","kind":"arxiv","version":1},"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:b414c263a45f61e625294d486db9ce1335e278906e9cb0566ff6b0a99103b227","target":"record","created_at":"2026-05-18T01:12:30Z","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":"d56e879f4a06577676092648e0a3fa554aa798a69d467d1f6881f82bd28ec923","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-03-26T20:00:25Z","title_canon_sha256":"7eab3bac16a41952423a22c94882c407cbf072e09c54c396a4e7af3f8a401948"},"schema_version":"1.0","source":{"id":"1503.07869","kind":"arxiv","version":1}},"canonical_sha256":"6f6a839266db726b4241817d8294bf2aa62fff14d00e57499f952d39fbcf0fb2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6f6a839266db726b4241817d8294bf2aa62fff14d00e57499f952d39fbcf0fb2","first_computed_at":"2026-05-18T01:12:30.862796Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:30.862796Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Os2GWx9Pxg2vNZ0kUUju98ORk+ciQcLhTQjRSkjpY4vMblACHPkmvYjBYkrVDZ4X84wG9jPO24T+s/OqyzrpCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:30.863115Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.07869","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b414c263a45f61e625294d486db9ce1335e278906e9cb0566ff6b0a99103b227","sha256:f997b60ec00a75ca31940c14ce3db12614bdba53e64fced98cdcc18e44768724"],"state_sha256":"c3bf0cf9be80a9880468d3abb17486dc955752bf55461171dee5a8c55f810dc6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UXhily4EUJzd9/Ad8JQFNvPxLaC6vyTVjIo/TN31m2BpHJ3aZOzccOaKDPDcevkhd3QjJvwShGBi0V4wU0+FCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T10:12:15.216165Z","bundle_sha256":"5d9aaf6f040039dfc18825c7081e618f694d6b4df8b15062428e8bd05ec42050"}}