{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:5ZGZHHHP6VOLVZ6KVCBKTB44WE","short_pith_number":"pith:5ZGZHHHP","canonical_record":{"source":{"id":"1206.6533","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-27T22:31:15Z","cross_cats_sorted":[],"title_canon_sha256":"b4b0fd0bce6094cf531da48dd1a1923759a2553619f4e6267392af8b8453e0c8","abstract_canon_sha256":"7f7734d6d831f874cb842934beb48a687865f46f9e4acb9686e06dfbe89518e6"},"schema_version":"1.0"},"canonical_sha256":"ee4d939ceff55cbae7caa882a9879cb13ee257af437894b3d8c082390d9ca6f1","source":{"kind":"arxiv","id":"1206.6533","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6533","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6533v2","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6533","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"5ZGZHHHP6VOL","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5ZGZHHHP6VOLVZ6K","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5ZGZHHHP","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:5ZGZHHHP6VOLVZ6KVCBKTB44WE","target":"record","payload":{"canonical_record":{"source":{"id":"1206.6533","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-27T22:31:15Z","cross_cats_sorted":[],"title_canon_sha256":"b4b0fd0bce6094cf531da48dd1a1923759a2553619f4e6267392af8b8453e0c8","abstract_canon_sha256":"7f7734d6d831f874cb842934beb48a687865f46f9e4acb9686e06dfbe89518e6"},"schema_version":"1.0"},"canonical_sha256":"ee4d939ceff55cbae7caa882a9879cb13ee257af437894b3d8c082390d9ca6f1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:44:39.213789Z","signature_b64":"AANCgwz6sQio0yAAKX+9bm3wL6csYgGSh5gZyZHAwzRAvBNDpuwez1F4yxS5PCuwBmAIOeQiINeSLCZ99CJ/BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ee4d939ceff55cbae7caa882a9879cb13ee257af437894b3d8c082390d9ca6f1","last_reissued_at":"2026-05-18T00:44:39.213289Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:44:39.213289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.6533","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Id5osScKFu96q1Y4pJE8mvk+geZHWNyS8Y8MI8QSkR2kUH0W7+ZxL9BBT4LI7Ai7rzaIAlx7dUtaawDfT7G9Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:30:07.063822Z"},"content_sha256":"bf2d8df1760201193d84e0fa7b9e60d4d08e6cc7eef4665e2c64b20ec0f39952","schema_version":"1.0","event_id":"sha256:bf2d8df1760201193d84e0fa7b9e60d4d08e6cc7eef4665e2c64b20ec0f39952"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:5ZGZHHHP6VOLVZ6KVCBKTB44WE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ruprecht 147: The oldest nearby open cluster as a new benchmark for stellar astrophysics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Angie Wolfgang, Jason L. Curtis, Jason T. Wright, John A. Johnson, John M. Brewer","submitted_at":"2012-06-27T22:31:15Z","abstract_excerpt":"Ruprecht 147 is a hitherto unappreciated open cluster that holds great promise as a standard in fundamental stellar astrophysics. We have conducted a radial velocity survey of astrometric candidates with Lick, Palomar, and MMT observatories and have identified over 100 members, including 5 blue stragglers, 11 red giants, and 5 double-lined spectroscopic binaries (SB2s). We estimate the cluster metallicity from spectroscopic analysis, using Spectroscopy Made Easy (SME), and find it to be [M/H] = +0.07 \\pm 0.03. We have obtained deep CFHT/MegaCam g'r'i' photometry and fit Padova isochrones to th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6533","kind":"arxiv","version":2},"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":"2026-05-18T00:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wke04Cr2GNZrN1nu58l8UzbI/dE2gy0sdjJIvg8QAxSk9MhZyyfg/UUZN9fF3Z/WHY5B9b5/hmcHTjIlP9LwCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T22:30:07.064527Z"},"content_sha256":"d25cff210e4bd02a5da0901168bc8a7d4d7dc17f9d22b2f09a739b3cac1fcfd6","schema_version":"1.0","event_id":"sha256:d25cff210e4bd02a5da0901168bc8a7d4d7dc17f9d22b2f09a739b3cac1fcfd6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/bundle.json","state_url":"https://pith.science/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/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":"2026-05-22T22:30:07Z","links":{"resolver":"https://pith.science/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE","bundle":"https://pith.science/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/bundle.json","state":"https://pith.science/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5ZGZHHHP6VOLVZ6KVCBKTB44WE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5ZGZHHHP6VOLVZ6KVCBKTB44WE","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":"7f7734d6d831f874cb842934beb48a687865f46f9e4acb9686e06dfbe89518e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-27T22:31:15Z","title_canon_sha256":"b4b0fd0bce6094cf531da48dd1a1923759a2553619f4e6267392af8b8453e0c8"},"schema_version":"1.0","source":{"id":"1206.6533","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6533","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6533v2","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6533","created_at":"2026-05-18T00:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"5ZGZHHHP6VOL","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5ZGZHHHP6VOLVZ6K","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5ZGZHHHP","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:d25cff210e4bd02a5da0901168bc8a7d4d7dc17f9d22b2f09a739b3cac1fcfd6","target":"graph","created_at":"2026-05-18T00:44:39Z","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":"Ruprecht 147 is a hitherto unappreciated open cluster that holds great promise as a standard in fundamental stellar astrophysics. We have conducted a radial velocity survey of astrometric candidates with Lick, Palomar, and MMT observatories and have identified over 100 members, including 5 blue stragglers, 11 red giants, and 5 double-lined spectroscopic binaries (SB2s). We estimate the cluster metallicity from spectroscopic analysis, using Spectroscopy Made Easy (SME), and find it to be [M/H] = +0.07 \\pm 0.03. We have obtained deep CFHT/MegaCam g'r'i' photometry and fit Padova isochrones to th","authors_text":"Angie Wolfgang, Jason L. Curtis, Jason T. Wright, John A. Johnson, John M. Brewer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-27T22:31:15Z","title":"Ruprecht 147: The oldest nearby open cluster as a new benchmark for stellar astrophysics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6533","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:bf2d8df1760201193d84e0fa7b9e60d4d08e6cc7eef4665e2c64b20ec0f39952","target":"record","created_at":"2026-05-18T00:44:39Z","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":"7f7734d6d831f874cb842934beb48a687865f46f9e4acb9686e06dfbe89518e6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-06-27T22:31:15Z","title_canon_sha256":"b4b0fd0bce6094cf531da48dd1a1923759a2553619f4e6267392af8b8453e0c8"},"schema_version":"1.0","source":{"id":"1206.6533","kind":"arxiv","version":2}},"canonical_sha256":"ee4d939ceff55cbae7caa882a9879cb13ee257af437894b3d8c082390d9ca6f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ee4d939ceff55cbae7caa882a9879cb13ee257af437894b3d8c082390d9ca6f1","first_computed_at":"2026-05-18T00:44:39.213289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:44:39.213289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AANCgwz6sQio0yAAKX+9bm3wL6csYgGSh5gZyZHAwzRAvBNDpuwez1F4yxS5PCuwBmAIOeQiINeSLCZ99CJ/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:44:39.213789Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.6533","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf2d8df1760201193d84e0fa7b9e60d4d08e6cc7eef4665e2c64b20ec0f39952","sha256:d25cff210e4bd02a5da0901168bc8a7d4d7dc17f9d22b2f09a739b3cac1fcfd6"],"state_sha256":"7747b737177bcc864188bff597e0b61604b23160d0536c9f310b1807b71eaab8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e862sjlP6vKfn0/iSqZM5eZIrrkEW+yau3J86HLskZy4i3RbrYfgIDCLNOFs1wK/UDcFhXR5lK9H4q7In9lIBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T22:30:07.068180Z","bundle_sha256":"cd8d485fb33eb109ce54c5472dc432a51d3508a9890b7ed8a1b096ee5bc793f3"}}