{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:R5AZHWW7BZFSIOXPERQSNIY25F","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":"0a1705c7f219eaedf0e669e5d3e999df44ad2ea69a965e035c0a1ee5371851bf","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-08-26T14:53:02Z","title_canon_sha256":"57095c439705483df8de3c91357ad1387671eef24efc26dbdbcecd92157997e6"},"schema_version":"1.0","source":{"id":"1108.5318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1108.5318","created_at":"2026-05-18T04:14:38Z"},{"alias_kind":"arxiv_version","alias_value":"1108.5318v1","created_at":"2026-05-18T04:14:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1108.5318","created_at":"2026-05-18T04:14:38Z"},{"alias_kind":"pith_short_12","alias_value":"R5AZHWW7BZFS","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"R5AZHWW7BZFSIOXP","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"R5AZHWW7","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:0b164e6eaf03127eeedbb769785de77c91aac5d4bd7f4282e76cbf08c2cf12e2","target":"graph","created_at":"2026-05-18T04:14:38Z","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 present the results of a multi-technique investigation of the M4.5Ve flare star AP Col, which we discover to be the nearest pre-main-sequence star. These include astrometric data from the CTIO 0.9m, from which we derive a proper motion of 342.0+/-0.5 mas yr^-1, a trigonometric parallax of 119.21+/-0.98 mas (8.39+/-0.07 pc), and photometry and photometric variability at optical wavelengths. We also provide spectroscopic data, including radial velocity (22.4+/-0.3 km s^-1), lithium Equivalent Width (EW) (0.28+/-0.02 A), H-alpha EW (-6.0 to -35 A), {\\it vsini} (11+/-1 km s^-1), and gravity ind","authors_text":"Adric R. Riedel, Carl Melis, John P. Subasavage, Simon J. Murphy, Todd J. Henry, Wei-Chun Jao","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-08-26T14:53:02Z","title":"The Solar Neighborhood. XXVI. AP Col: The Closest (8.4 pc) Pre-Main-Sequence Star"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.5318","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":"sha256:2498517709df8306b59398c7cfc7520b5a8936c296e39abe061dda7dbd3a01ec","target":"record","created_at":"2026-05-18T04:14:38Z","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":"0a1705c7f219eaedf0e669e5d3e999df44ad2ea69a965e035c0a1ee5371851bf","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-08-26T14:53:02Z","title_canon_sha256":"57095c439705483df8de3c91357ad1387671eef24efc26dbdbcecd92157997e6"},"schema_version":"1.0","source":{"id":"1108.5318","kind":"arxiv","version":1}},"canonical_sha256":"8f4193dadf0e4b243aef246126a31ae959ca2cc24ab6a0cb7af9e2fa6385dc6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f4193dadf0e4b243aef246126a31ae959ca2cc24ab6a0cb7af9e2fa6385dc6b","first_computed_at":"2026-05-18T04:14:38.540854Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:14:38.540854Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"4i7jz68JeS4oSNTbm4E6gLF/qQBZuuF9wm0y+1nnN/iEKv0A5G+LDzL5hF+6EnDdZSQmITCMV1/xarbFQSCgCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:14:38.541252Z","signed_message":"canonical_sha256_bytes"},"source_id":"1108.5318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2498517709df8306b59398c7cfc7520b5a8936c296e39abe061dda7dbd3a01ec","sha256:0b164e6eaf03127eeedbb769785de77c91aac5d4bd7f4282e76cbf08c2cf12e2"],"state_sha256":"be92c35c7bad564b3a1394e3499858c8a948db3d19bdf703b089bf28aa02f62b"}