{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QRPY6RHO2IXKC2UM6TZLA2BBCZ","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":"312cf23b54e9f0f75c51a0bd6252e29c0642335c85fe6a5aa0d1d62f4f1b3c22","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-10-23T12:41:05Z","title_canon_sha256":"187f8b592b842b1e0ab78e6eb51c65ec3aab395ab9d61887d5b73f5a9343eb2e"},"schema_version":"1.0","source":{"id":"1810.09819","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.09819","created_at":"2026-05-17T23:58:01Z"},{"alias_kind":"arxiv_version","alias_value":"1810.09819v2","created_at":"2026-05-17T23:58:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.09819","created_at":"2026-05-17T23:58:01Z"},{"alias_kind":"pith_short_12","alias_value":"QRPY6RHO2IXK","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"QRPY6RHO2IXKC2UM","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"QRPY6RHO","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:91cfa2e39fe57c1ed68cee95433221802ea8608b228e0155b86fe880f7933078","target":"graph","created_at":"2026-05-17T23:58:01Z","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 study the three dimensional arrangement of young stars in the solar neighbourhood using the second release of the Gaia mission (Gaia DR2) and we provide a new, original view of the spatial configuration of the star forming regions within 500 pc from the Sun. By smoothing the star distribution through a gaussian filter, we construct three dimensional density maps for early-type stars (upper-main sequence, UMS) and pre-main sequence (PMS) sources. The PMS and the UMS samples are selected through a combination of photometric and astrometric criteria. A side product of the analysis is a three d","authors_text":"A. G. A. Brown, E. Zari, H. Hashemi, K. Jardine, P.T. de Zeeuw","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-10-23T12:41:05Z","title":"3D mapping of young stars in the solar neighbourhood with Gaia DR2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.09819","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:b8f8926aab6cab86a9e85a1d7c27f1a1bd938ec150a4607204654abfd7cf21a5","target":"record","created_at":"2026-05-17T23:58:01Z","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":"312cf23b54e9f0f75c51a0bd6252e29c0642335c85fe6a5aa0d1d62f4f1b3c22","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-10-23T12:41:05Z","title_canon_sha256":"187f8b592b842b1e0ab78e6eb51c65ec3aab395ab9d61887d5b73f5a9343eb2e"},"schema_version":"1.0","source":{"id":"1810.09819","kind":"arxiv","version":2}},"canonical_sha256":"845f8f44eed22ea16a8cf4f2b06821167d57d0c638ea8285e2c6fc906a45b8be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"845f8f44eed22ea16a8cf4f2b06821167d57d0c638ea8285e2c6fc906a45b8be","first_computed_at":"2026-05-17T23:58:01.886453Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:01.886453Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"oP4+osk7znnKnlA3mlIWU4msF3WkoTm7LaWmxelbT0E3C1n5o/KFlZq2sTNGMGOlpol4QzDpip6JjXhMqmIaBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:01.886888Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.09819","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b8f8926aab6cab86a9e85a1d7c27f1a1bd938ec150a4607204654abfd7cf21a5","sha256:91cfa2e39fe57c1ed68cee95433221802ea8608b228e0155b86fe880f7933078"],"state_sha256":"31c4cd45d0a5e0744d27d41b8a36caae2df85a657b57cd10748fd0bbe38370f0"}