{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:3OBOEEAACJLX6IUPVU52ZCGID3","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":"4d3d0cf417bd38669f08ea3dc1e14ba167ec558adcdd858cd333f198f4edff64","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-26T07:12:24Z","title_canon_sha256":"3690dee029b79b0da4a354cc322054c806734a1115020be6f3b376b6950ceac3"},"schema_version":"1.0","source":{"id":"1704.07990","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1704.07990","created_at":"2026-05-18T00:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1704.07990v2","created_at":"2026-05-18T00:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1704.07990","created_at":"2026-05-18T00:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"3OBOEEAACJLX","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_16","alias_value":"3OBOEEAACJLX6IUP","created_at":"2026-05-18T12:30:58Z"},{"alias_kind":"pith_short_8","alias_value":"3OBOEEAA","created_at":"2026-05-18T12:30:58Z"}],"graph_snapshots":[{"event_id":"sha256:ef189969384bafc727a5642040a57f2b0ecea477f1ccb4b5da6d7b7b8ed7886e","target":"graph","created_at":"2026-05-18T00:43:34Z","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 paucity of hypervelocity stars (HVSs) known to date has severely hampered their potential to investigate the stellar population of the Galactic Centre and the Galactic Potential. The first Gaia data release gives an opportunity to increase the current sample. The challenge is the disparity between the expected number of hypervelocity stars and that of bound background stars. We have applied a novel data mining algorithm based on machine learning techniques, an artificial neural network, to the Tycho-Gaia astrometric solution (TGAS) catalogue. With no pre-selection of data, we could exclude","authors_text":"A. G. A. Brown, A. Rimoldi, E. M. Rossi, E. Starkenburg, G. Kordopatis, K. Youakim, R. Ashley, T. Marchetti","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-26T07:12:24Z","title":"An artificial neural network to discover Hypervelocity stars: Candidates in Gaia DR1/TGAS"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1704.07990","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":"sha256:8ab16791f3aa3f95ab88a3eed66ae42eaec2c32cd7d3e6d95d15dbf38582466b","target":"record","created_at":"2026-05-18T00:43:34Z","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":"4d3d0cf417bd38669f08ea3dc1e14ba167ec558adcdd858cd333f198f4edff64","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-04-26T07:12:24Z","title_canon_sha256":"3690dee029b79b0da4a354cc322054c806734a1115020be6f3b376b6950ceac3"},"schema_version":"1.0","source":{"id":"1704.07990","kind":"arxiv","version":2}},"canonical_sha256":"db82e2100012577f228fad3bac88c81ecdb849c4beab73707624b40e557c1346","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"db82e2100012577f228fad3bac88c81ecdb849c4beab73707624b40e557c1346","first_computed_at":"2026-05-18T00:43:34.999359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:43:34.999359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vPlHZXqWEJyRmSXgdaEEDfLnYTYj3WKf6DcATbFFzoiE2hL9ULlLbeWQrf6QWPgEFgLoYhCkHtJeh01e3DG3AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:43:34.999872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1704.07990","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8ab16791f3aa3f95ab88a3eed66ae42eaec2c32cd7d3e6d95d15dbf38582466b","sha256:ef189969384bafc727a5642040a57f2b0ecea477f1ccb4b5da6d7b7b8ed7886e"],"state_sha256":"71e43acdbfa4418461977e6325a1519c32d00ab32f75224414ee181f63816256"}