{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:6PN7UOYYTJU3PC7HD7HAEDVF44","short_pith_number":"pith:6PN7UOYY","canonical_record":{"source":{"id":"1508.03108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-13T03:15:29Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4815eaaa374afd0ce08ba712cf7e048a7512669a073a525c068ec5c432de334e","abstract_canon_sha256":"f6cf3e942070debab9e2f671f9aa6dd2ddc60f9ff836deb45e23b0ced43225e0"},"schema_version":"1.0"},"canonical_sha256":"f3dbfa3b189a69b78be71fce020ea5e727f3ffec71a2a8e5f407154bedfb4fc1","source":{"kind":"arxiv","id":"1508.03108","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03108","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03108v1","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03108","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"pith_short_12","alias_value":"6PN7UOYYTJU3","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6PN7UOYYTJU3PC7H","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6PN7UOYY","created_at":"2026-05-18T12:29:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:6PN7UOYYTJU3PC7HD7HAEDVF44","target":"record","payload":{"canonical_record":{"source":{"id":"1508.03108","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-13T03:15:29Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"4815eaaa374afd0ce08ba712cf7e048a7512669a073a525c068ec5c432de334e","abstract_canon_sha256":"f6cf3e942070debab9e2f671f9aa6dd2ddc60f9ff836deb45e23b0ced43225e0"},"schema_version":"1.0"},"canonical_sha256":"f3dbfa3b189a69b78be71fce020ea5e727f3ffec71a2a8e5f407154bedfb4fc1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:31:31.621241Z","signature_b64":"f13DgBihxB4elP5rcZUKE8IyC0qsiR0pfDqIwcpzt9KEHYhAhRiJHAT3ZAb6Kqfdqmpx7oTzVy9c38Png4IeBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f3dbfa3b189a69b78be71fce020ea5e727f3ffec71a2a8e5f407154bedfb4fc1","last_reissued_at":"2026-05-18T01:31:31.620644Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:31:31.620644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.03108","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":"2026-05-18T01:31:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YxFW3F7LVPA4BHjBSdxNxz6Fr/whtAuQn//hca9Kxv6BBLHyTRMu8+X2EMk76eV/zsLO77TdItrHBUwlLkY2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:34:01.516556Z"},"content_sha256":"84a888ce11311d4cb7493a411a8b93efbc1e908361599672e88614ff2299faca","schema_version":"1.0","event_id":"sha256:84a888ce11311d4cb7493a411a8b93efbc1e908361599672e88614ff2299faca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:6PN7UOYYTJU3PC7HD7HAEDVF44","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Predicting Gaia's Parallax Distance to the Cygnus OB2 Association with Eclipsing Binaries","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Carlos A. Vargas \\'Alvarez, Daniel C. Kiminki, Henry A. Kobulnicky, Michael J. Alexander, Michael J. Lundquist","submitted_at":"2015-08-13T03:15:29Z","abstract_excerpt":"The Cygnus OB2 Association is one of the nearest and largest collections of massive stars in the Galaxy. Situated at the heart of the \"Cygnus X\" complex of star-forming regions and molecular clouds, its distance has proven elusive owing to the ambiguous nature of kinematic distances along this $\\ell\\simeq80$ degree sightline and the heavy, patchy extinction. In an effort to refine the three-dimensional geometry of key Cygnus~X constituents, we have measured distances to four eclipsing double-lined OB-type spectroscopic binaries that are probable members of Cyg~OB2. We find distances of $1.33\\p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03108","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":"2026-05-18T01:31:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hBN0mfa2tPB6OcXP3L7UYS1ggLq+WszmERD3rBDo4fG7hPVKK5uQ1XlEVyfXizKHJiS7oF76p5VSkYtJiRJvCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T13:34:01.517199Z"},"content_sha256":"fadf54d8faa6514d892434d7f9a63aaa91362273f0fee029b42f51e66e241b16","schema_version":"1.0","event_id":"sha256:fadf54d8faa6514d892434d7f9a63aaa91362273f0fee029b42f51e66e241b16"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/bundle.json","state_url":"https://pith.science/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/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":"2026-05-28T13:34:01Z","links":{"resolver":"https://pith.science/pith/6PN7UOYYTJU3PC7HD7HAEDVF44","bundle":"https://pith.science/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/bundle.json","state":"https://pith.science/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6PN7UOYYTJU3PC7HD7HAEDVF44/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:6PN7UOYYTJU3PC7HD7HAEDVF44","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":"f6cf3e942070debab9e2f671f9aa6dd2ddc60f9ff836deb45e23b0ced43225e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-13T03:15:29Z","title_canon_sha256":"4815eaaa374afd0ce08ba712cf7e048a7512669a073a525c068ec5c432de334e"},"schema_version":"1.0","source":{"id":"1508.03108","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.03108","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"arxiv_version","alias_value":"1508.03108v1","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.03108","created_at":"2026-05-18T01:31:31Z"},{"alias_kind":"pith_short_12","alias_value":"6PN7UOYYTJU3","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_16","alias_value":"6PN7UOYYTJU3PC7H","created_at":"2026-05-18T12:29:07Z"},{"alias_kind":"pith_short_8","alias_value":"6PN7UOYY","created_at":"2026-05-18T12:29:07Z"}],"graph_snapshots":[{"event_id":"sha256:fadf54d8faa6514d892434d7f9a63aaa91362273f0fee029b42f51e66e241b16","target":"graph","created_at":"2026-05-18T01:31:31Z","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 Cygnus OB2 Association is one of the nearest and largest collections of massive stars in the Galaxy. Situated at the heart of the \"Cygnus X\" complex of star-forming regions and molecular clouds, its distance has proven elusive owing to the ambiguous nature of kinematic distances along this $\\ell\\simeq80$ degree sightline and the heavy, patchy extinction. In an effort to refine the three-dimensional geometry of key Cygnus~X constituents, we have measured distances to four eclipsing double-lined OB-type spectroscopic binaries that are probable members of Cyg~OB2. We find distances of $1.33\\p","authors_text":"Carlos A. Vargas \\'Alvarez, Daniel C. Kiminki, Henry A. Kobulnicky, Michael J. Alexander, Michael J. Lundquist","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-13T03:15:29Z","title":"Predicting Gaia's Parallax Distance to the Cygnus OB2 Association with Eclipsing Binaries"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.03108","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":"sha256:84a888ce11311d4cb7493a411a8b93efbc1e908361599672e88614ff2299faca","target":"record","created_at":"2026-05-18T01:31:31Z","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":"f6cf3e942070debab9e2f671f9aa6dd2ddc60f9ff836deb45e23b0ced43225e0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-08-13T03:15:29Z","title_canon_sha256":"4815eaaa374afd0ce08ba712cf7e048a7512669a073a525c068ec5c432de334e"},"schema_version":"1.0","source":{"id":"1508.03108","kind":"arxiv","version":1}},"canonical_sha256":"f3dbfa3b189a69b78be71fce020ea5e727f3ffec71a2a8e5f407154bedfb4fc1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f3dbfa3b189a69b78be71fce020ea5e727f3ffec71a2a8e5f407154bedfb4fc1","first_computed_at":"2026-05-18T01:31:31.620644Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:31:31.620644Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f13DgBihxB4elP5rcZUKE8IyC0qsiR0pfDqIwcpzt9KEHYhAhRiJHAT3ZAb6Kqfdqmpx7oTzVy9c38Png4IeBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:31:31.621241Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.03108","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:84a888ce11311d4cb7493a411a8b93efbc1e908361599672e88614ff2299faca","sha256:fadf54d8faa6514d892434d7f9a63aaa91362273f0fee029b42f51e66e241b16"],"state_sha256":"7b0f21dad0398747eeba18607a2f4378c498d992fff2610584bb14fe73f309e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Aa0V223c/bo6B+drtx/gHcAcxx8Q90HOpIaFqLHbuFryMz2Ucjd5LOvBt0nI8KtgQDAtlywFh9HDVuCYSrQ0CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T13:34:01.520381Z","bundle_sha256":"64687f61be0653db59226bcff578102f2b55ca143c48d9eabcade8a2afd0533e"}}