{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:UHDZCFWTZOYQXBGHHZMYVKJ4WK","short_pith_number":"pith:UHDZCFWT","canonical_record":{"source":{"id":"2108.05172","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-11T12:00:21Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"41f5b254b793cfd39bb0540cd784bc4c0e2b8496b525bbf65c94746ed2d013d5","abstract_canon_sha256":"de58daf61dc3f3557860736d9ac721a35f04f676bc5c58ac1f9ef30560c9346f"},"schema_version":"1.0"},"canonical_sha256":"a1c79116d3cbb10b84c73e598aa93cb29a08452a2b25c3b7be4974b8604ee393","source":{"kind":"arxiv","id":"2108.05172","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.05172","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"arxiv_version","alias_value":"2108.05172v1","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.05172","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_12","alias_value":"UHDZCFWTZOYQ","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_16","alias_value":"UHDZCFWTZOYQXBGH","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_8","alias_value":"UHDZCFWT","created_at":"2026-07-05T03:23:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:UHDZCFWTZOYQXBGHHZMYVKJ4WK","target":"record","payload":{"canonical_record":{"source":{"id":"2108.05172","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-11T12:00:21Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"41f5b254b793cfd39bb0540cd784bc4c0e2b8496b525bbf65c94746ed2d013d5","abstract_canon_sha256":"de58daf61dc3f3557860736d9ac721a35f04f676bc5c58ac1f9ef30560c9346f"},"schema_version":"1.0"},"canonical_sha256":"a1c79116d3cbb10b84c73e598aa93cb29a08452a2b25c3b7be4974b8604ee393","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:23:46.905652Z","signature_b64":"79/V1bECinElgM4bOnWvvIRAktGR0L5AkP98BR8B/2rZxDrJwo5fbE4YIzkNQSD5ZTLHQIJ88z5iiPDOVVOeCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1c79116d3cbb10b84c73e598aa93cb29a08452a2b25c3b7be4974b8604ee393","last_reissued_at":"2026-07-05T03:23:46.905169Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:23:46.905169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.05172","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":"2026-07-05T03:23:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6T8rGGurleOIkqaYHak3myWE3XQh0dqLa6sM2ZFRguCWHH1F+JZuxysdVXDOypVJU7WfaUD8hIxJx6fmwEiRBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:48:32.734464Z"},"content_sha256":"edfd627a424a32d04a0504bac8fe48c391205abd4ccecbdb1daf0ce54eec156a","schema_version":"1.0","event_id":"sha256:edfd627a424a32d04a0504bac8fe48c391205abd4ccecbdb1daf0ce54eec156a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:UHDZCFWTZOYQXBGHHZMYVKJ4WK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Clean catalogues of blue horizontal-branch stars using Gaia EDR3","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Ingrid Pelisoli, Richard Culpan, Stephan Geier","submitted_at":"2021-08-11T12:00:21Z","abstract_excerpt":"Context: Blue horizontal-branch stars are very old objects that can be used as markers in studies of the Galactic structure and formation history. To create a clean sky catalogue of blue horizontal-branch stars, we cross-matched the Gaia data release 2 (DR2) dataset with existing reference catalogues to define selection criteria based on Gaia DR2 parameters. Following the publication of Gaia early data release 3 (EDR3), these methods were verified and subsequently applied to this latest release. Aims: The purpose of this catalogue is to identify a set of blue horizontal-branch star candidates "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.05172","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2108.05172/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:23:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y419HiOEqVh0ZcPdsOoJYxp7SM1hHVnadTAgQJnXXdtsbu58NZPVkckKXClRE+Nj2vh4/fcbOGw4D8GLQNNBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:48:32.734853Z"},"content_sha256":"36e2ef339999ca937ea4bc196a81edc1f4ff2be57cd7d4c1402d40a17de27a92","schema_version":"1.0","event_id":"sha256:36e2ef339999ca937ea4bc196a81edc1f4ff2be57cd7d4c1402d40a17de27a92"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/bundle.json","state_url":"https://pith.science/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/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":"2026-08-03T15:48:32Z","links":{"resolver":"https://pith.science/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK","bundle":"https://pith.science/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/bundle.json","state":"https://pith.science/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UHDZCFWTZOYQXBGHHZMYVKJ4WK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:UHDZCFWTZOYQXBGHHZMYVKJ4WK","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":"de58daf61dc3f3557860736d9ac721a35f04f676bc5c58ac1f9ef30560c9346f","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-11T12:00:21Z","title_canon_sha256":"41f5b254b793cfd39bb0540cd784bc4c0e2b8496b525bbf65c94746ed2d013d5"},"schema_version":"1.0","source":{"id":"2108.05172","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.05172","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"arxiv_version","alias_value":"2108.05172v1","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.05172","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_12","alias_value":"UHDZCFWTZOYQ","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_16","alias_value":"UHDZCFWTZOYQXBGH","created_at":"2026-07-05T03:23:46Z"},{"alias_kind":"pith_short_8","alias_value":"UHDZCFWT","created_at":"2026-07-05T03:23:46Z"}],"graph_snapshots":[{"event_id":"sha256:36e2ef339999ca937ea4bc196a81edc1f4ff2be57cd7d4c1402d40a17de27a92","target":"graph","created_at":"2026-07-05T03:23:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2108.05172/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Context: Blue horizontal-branch stars are very old objects that can be used as markers in studies of the Galactic structure and formation history. To create a clean sky catalogue of blue horizontal-branch stars, we cross-matched the Gaia data release 2 (DR2) dataset with existing reference catalogues to define selection criteria based on Gaia DR2 parameters. Following the publication of Gaia early data release 3 (EDR3), these methods were verified and subsequently applied to this latest release. Aims: The purpose of this catalogue is to identify a set of blue horizontal-branch star candidates ","authors_text":"Ingrid Pelisoli, Richard Culpan, Stephan Geier","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-11T12:00:21Z","title":"Clean catalogues of blue horizontal-branch stars using Gaia EDR3"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.05172","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:edfd627a424a32d04a0504bac8fe48c391205abd4ccecbdb1daf0ce54eec156a","target":"record","created_at":"2026-07-05T03:23:46Z","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":"de58daf61dc3f3557860736d9ac721a35f04f676bc5c58ac1f9ef30560c9346f","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-08-11T12:00:21Z","title_canon_sha256":"41f5b254b793cfd39bb0540cd784bc4c0e2b8496b525bbf65c94746ed2d013d5"},"schema_version":"1.0","source":{"id":"2108.05172","kind":"arxiv","version":1}},"canonical_sha256":"a1c79116d3cbb10b84c73e598aa93cb29a08452a2b25c3b7be4974b8604ee393","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1c79116d3cbb10b84c73e598aa93cb29a08452a2b25c3b7be4974b8604ee393","first_computed_at":"2026-07-05T03:23:46.905169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:23:46.905169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"79/V1bECinElgM4bOnWvvIRAktGR0L5AkP98BR8B/2rZxDrJwo5fbE4YIzkNQSD5ZTLHQIJ88z5iiPDOVVOeCg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:23:46.905652Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.05172","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edfd627a424a32d04a0504bac8fe48c391205abd4ccecbdb1daf0ce54eec156a","sha256:36e2ef339999ca937ea4bc196a81edc1f4ff2be57cd7d4c1402d40a17de27a92"],"state_sha256":"257313370982c7a5140f5596f5ce93afc90a2549ed9f402f05b1649ef3b73f30"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ggMbxrfLUob0Yw2tgz9TV5JzhQt8a7VXNW/QOxld5HJeTer43CHPEke/EV/XSLCo1wX1UFqX+DPZ7Ph72WACAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T15:48:32.738089Z","bundle_sha256":"e9e9f8d682ffe10bce2b7f3e6ecac4f6c089abd35a7175fb9f1b5276ec1aef49"}}