{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:24P2DLMB5HEF2HKKIK7BMZXIOJ","short_pith_number":"pith:24P2DLMB","canonical_record":{"source":{"id":"1808.09778","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-29T13:05:12Z","cross_cats_sorted":[],"title_canon_sha256":"2f056d8836e7775dd14286cb074b3bb228b466d7b015741a13dabcc906ee906f","abstract_canon_sha256":"d892a500ee850b4b4da147ad3d024852e97b345c63ab35fd26df8ce32e80972a"},"schema_version":"1.0"},"canonical_sha256":"d71fa1ad81e9c85d1d4a42be1666e8725f9c708be2be2b5f9544acacb1b482e2","source":{"kind":"arxiv","id":"1808.09778","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09778","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09778v1","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09778","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"pith_short_12","alias_value":"24P2DLMB5HEF","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"24P2DLMB5HEF2HKK","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"24P2DLMB","created_at":"2026-05-18T12:31:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:24P2DLMB5HEF2HKKIK7BMZXIOJ","target":"record","payload":{"canonical_record":{"source":{"id":"1808.09778","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-29T13:05:12Z","cross_cats_sorted":[],"title_canon_sha256":"2f056d8836e7775dd14286cb074b3bb228b466d7b015741a13dabcc906ee906f","abstract_canon_sha256":"d892a500ee850b4b4da147ad3d024852e97b345c63ab35fd26df8ce32e80972a"},"schema_version":"1.0"},"canonical_sha256":"d71fa1ad81e9c85d1d4a42be1666e8725f9c708be2be2b5f9544acacb1b482e2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:06:54.489957Z","signature_b64":"ZAAouvxrEu4Dxw6RFQpl4QaKIpZSlql13B8rTBl3OFpR0padK3GFmRCYYaozNx/B1LQ3x8jwmwVtBwtecXrnAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d71fa1ad81e9c85d1d4a42be1666e8725f9c708be2be2b5f9544acacb1b482e2","last_reissued_at":"2026-05-18T00:06:54.489444Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:06:54.489444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.09778","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":"2026-05-18T00:06:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Lt+XZN5dKyrW71DCkkCRNL7/BeUlQvU71j7O6WCt78ANsQGlk8KAARF/Iypa1aPVd7GxlpTgh0HIykluk62+Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:11:50.475343Z"},"content_sha256":"88badff3da39c7b02b4ea82a6ff3b03f0b93442c82191bfcac3602f2d0c9cb06","schema_version":"1.0","event_id":"sha256:88badff3da39c7b02b4ea82a6ff3b03f0b93442c82191bfcac3602f2d0c9cb06"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:24P2DLMB5HEF2HKKIK7BMZXIOJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Gaia FGK benchmark stars version 2.1","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Carlos Rodrigo, Caroline Soubiran, C. Clare Worley, Keith Hawkins, Marcelo Tucci Maia, Paula Jofre, Sergi Blanco-Cuaresma, Ulrike Heiter","submitted_at":"2018-08-29T13:05:12Z","abstract_excerpt":"The Gaia FGK benchmark stars are among the preferred samples of reference stars to test parametrisation pipelines of spectroscopic surveys. They consist of a small but carefully selected sample whose parameters are derived consistently and homogeneously. Here we summarise this work and provide our current list of stars with associated parameters which are recommended for validation and calibration purposes for stellar surveys. Data available at CDS as catalog III/281."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09778","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":"2026-05-18T00:06:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WjJFd4WZaWrU1ey2ETtZLy9CuGHMHRukeHUKcs1tqMOENKYyxDPoEiOBg9Npfv6/LwEBrYbpiXdB3nuRIPiVDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:11:50.475982Z"},"content_sha256":"b040e2669c155b1d5893d7c4663579252bdc26107213693d27fba82001c369f4","schema_version":"1.0","event_id":"sha256:b040e2669c155b1d5893d7c4663579252bdc26107213693d27fba82001c369f4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/bundle.json","state_url":"https://pith.science/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/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":"2026-05-28T20:11:50Z","links":{"resolver":"https://pith.science/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ","bundle":"https://pith.science/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/bundle.json","state":"https://pith.science/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/24P2DLMB5HEF2HKKIK7BMZXIOJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:24P2DLMB5HEF2HKKIK7BMZXIOJ","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":"d892a500ee850b4b4da147ad3d024852e97b345c63ab35fd26df8ce32e80972a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-29T13:05:12Z","title_canon_sha256":"2f056d8836e7775dd14286cb074b3bb228b466d7b015741a13dabcc906ee906f"},"schema_version":"1.0","source":{"id":"1808.09778","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.09778","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"arxiv_version","alias_value":"1808.09778v1","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09778","created_at":"2026-05-18T00:06:54Z"},{"alias_kind":"pith_short_12","alias_value":"24P2DLMB5HEF","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_16","alias_value":"24P2DLMB5HEF2HKK","created_at":"2026-05-18T12:31:59Z"},{"alias_kind":"pith_short_8","alias_value":"24P2DLMB","created_at":"2026-05-18T12:31:59Z"}],"graph_snapshots":[{"event_id":"sha256:b040e2669c155b1d5893d7c4663579252bdc26107213693d27fba82001c369f4","target":"graph","created_at":"2026-05-18T00:06:54Z","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 Gaia FGK benchmark stars are among the preferred samples of reference stars to test parametrisation pipelines of spectroscopic surveys. They consist of a small but carefully selected sample whose parameters are derived consistently and homogeneously. Here we summarise this work and provide our current list of stars with associated parameters which are recommended for validation and calibration purposes for stellar surveys. Data available at CDS as catalog III/281.","authors_text":"Carlos Rodrigo, Caroline Soubiran, C. Clare Worley, Keith Hawkins, Marcelo Tucci Maia, Paula Jofre, Sergi Blanco-Cuaresma, Ulrike Heiter","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-29T13:05:12Z","title":"The Gaia FGK benchmark stars version 2.1"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09778","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":"sha256:88badff3da39c7b02b4ea82a6ff3b03f0b93442c82191bfcac3602f2d0c9cb06","target":"record","created_at":"2026-05-18T00:06:54Z","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":"d892a500ee850b4b4da147ad3d024852e97b345c63ab35fd26df8ce32e80972a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-08-29T13:05:12Z","title_canon_sha256":"2f056d8836e7775dd14286cb074b3bb228b466d7b015741a13dabcc906ee906f"},"schema_version":"1.0","source":{"id":"1808.09778","kind":"arxiv","version":1}},"canonical_sha256":"d71fa1ad81e9c85d1d4a42be1666e8725f9c708be2be2b5f9544acacb1b482e2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d71fa1ad81e9c85d1d4a42be1666e8725f9c708be2be2b5f9544acacb1b482e2","first_computed_at":"2026-05-18T00:06:54.489444Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:06:54.489444Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZAAouvxrEu4Dxw6RFQpl4QaKIpZSlql13B8rTBl3OFpR0padK3GFmRCYYaozNx/B1LQ3x8jwmwVtBwtecXrnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:06:54.489957Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.09778","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:88badff3da39c7b02b4ea82a6ff3b03f0b93442c82191bfcac3602f2d0c9cb06","sha256:b040e2669c155b1d5893d7c4663579252bdc26107213693d27fba82001c369f4"],"state_sha256":"3d0727c7c86f31d484b98c28eb32e587cf723b53ef63e1c8b54679b55e0f040d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TvCjx0ZmNjn39wGb7Xc/s93nwc/WPZwVXktfZez3fh8bcWlHnUIGbIC9+tfu+E2LUb60EsBS0MrSni3u8p1JDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:11:50.479502Z","bundle_sha256":"b658fb1dfbf7c95e14c1197306dba12f44fc8e88ead65cf613fc7f80baadb1cc"}}