{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:PZ2UGCY3W4YBWVQVAN2Y5XDYGH","short_pith_number":"pith:PZ2UGCY3","canonical_record":{"source":{"id":"1901.02458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-08T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"ea0e07dc0f862bdd0ce915c95d404ab3933b7abacb13d1c3a24f6830921edfc3","abstract_canon_sha256":"5094fd363ef25df6a3c8a30bf5c103afd7cc4988e21dde397a87fdb15aa6e015"},"schema_version":"1.0"},"canonical_sha256":"7e75430b1bb7301b561503758edc7831fcbd3b6448ad2001b9739c877f7013c6","source":{"kind":"arxiv","id":"1901.02458","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02458","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02458v1","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02458","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"pith_short_12","alias_value":"PZ2UGCY3W4YB","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PZ2UGCY3W4YBWVQV","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PZ2UGCY3","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:PZ2UGCY3W4YBWVQVAN2Y5XDYGH","target":"record","payload":{"canonical_record":{"source":{"id":"1901.02458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-08T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"ea0e07dc0f862bdd0ce915c95d404ab3933b7abacb13d1c3a24f6830921edfc3","abstract_canon_sha256":"5094fd363ef25df6a3c8a30bf5c103afd7cc4988e21dde397a87fdb15aa6e015"},"schema_version":"1.0"},"canonical_sha256":"7e75430b1bb7301b561503758edc7831fcbd3b6448ad2001b9739c877f7013c6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:40.474469Z","signature_b64":"nhlg5nKt+31Td45coA+7gx0y38hZpBj0KfDKRtBPrADkFmjm6JUv1i270YrtIYnLoprhx0UkNrJ+TS2AUhynBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e75430b1bb7301b561503758edc7831fcbd3b6448ad2001b9739c877f7013c6","last_reissued_at":"2026-05-17T23:56:40.473776Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:40.473776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.02458","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":"2026-05-17T23:56:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t+igA6Jw6V34nPcWs4fhUfeiiCKWi62o1xu0Sdo5Snr4G5QquVSFxKBzsfre9U0FNL37rDbBF1+tfRTsJM8VCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:37:28.868187Z"},"content_sha256":"12c7b6dd20b884aca120a0e3605b9a596f15902843efb76a6e9b4285649b8d3a","schema_version":"1.0","event_id":"sha256:12c7b6dd20b884aca120a0e3605b9a596f15902843efb76a6e9b4285649b8d3a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:PZ2UGCY3W4YBWVQVAN2Y5XDYGH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Possible Relic Star Cluster in the Sextans Dwarf Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Hak-Sub Kim, Hyunjin Jeong, Sang-Il Han, Seok-Joo Joo, Suk-Jin Yoon","submitted_at":"2019-01-08T19:00:01Z","abstract_excerpt":"We report a possible discovery of a relic star cluster in the Sextans dwarf spheroidal galaxy. Using the \\textit{hk} index ($\\equiv$($Ca-b$)$-$($b-y$)) as a photometric metallicity indicator, we discriminate the metal-poor and metal-rich stars in the galaxy and find unexpected number density excess of metal-poor stars located 7'.7 ($\\sim$190 pc in projected distance) away from the known galactic center. The $V-I$ color$-$magnitude diagram (CMD) for stars around the density excess reveals that both the main sequence and the giant branch are considerably narrower and redder than the bulk of fiel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02458","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":"2026-05-17T23:56:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tpo+ONERm7Pbnzi16Z7An3iiS8EZM2IWKpdvFuGow5e5osIqyyDjuqwEOPWXFAnBYBcn5p6FZMH50zbPVMS+BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-10T22:37:28.869110Z"},"content_sha256":"af7242a8bfc3d2e8f8f0fefa14312812eaffefe4ab7b2018b3b55aa480cb6aad","schema_version":"1.0","event_id":"sha256:af7242a8bfc3d2e8f8f0fefa14312812eaffefe4ab7b2018b3b55aa480cb6aad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/bundle.json","state_url":"https://pith.science/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/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":"2026-06-10T22:37:28Z","links":{"resolver":"https://pith.science/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH","bundle":"https://pith.science/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/bundle.json","state":"https://pith.science/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PZ2UGCY3W4YBWVQVAN2Y5XDYGH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:PZ2UGCY3W4YBWVQVAN2Y5XDYGH","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":"5094fd363ef25df6a3c8a30bf5c103afd7cc4988e21dde397a87fdb15aa6e015","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-08T19:00:01Z","title_canon_sha256":"ea0e07dc0f862bdd0ce915c95d404ab3933b7abacb13d1c3a24f6830921edfc3"},"schema_version":"1.0","source":{"id":"1901.02458","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02458","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02458v1","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02458","created_at":"2026-05-17T23:56:40Z"},{"alias_kind":"pith_short_12","alias_value":"PZ2UGCY3W4YB","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"PZ2UGCY3W4YBWVQV","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"PZ2UGCY3","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:af7242a8bfc3d2e8f8f0fefa14312812eaffefe4ab7b2018b3b55aa480cb6aad","target":"graph","created_at":"2026-05-17T23:56:40Z","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 report a possible discovery of a relic star cluster in the Sextans dwarf spheroidal galaxy. Using the \\textit{hk} index ($\\equiv$($Ca-b$)$-$($b-y$)) as a photometric metallicity indicator, we discriminate the metal-poor and metal-rich stars in the galaxy and find unexpected number density excess of metal-poor stars located 7'.7 ($\\sim$190 pc in projected distance) away from the known galactic center. The $V-I$ color$-$magnitude diagram (CMD) for stars around the density excess reveals that both the main sequence and the giant branch are considerably narrower and redder than the bulk of fiel","authors_text":"Hak-Sub Kim, Hyunjin Jeong, Sang-Il Han, Seok-Joo Joo, Suk-Jin Yoon","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-08T19:00:01Z","title":"A Possible Relic Star Cluster in the Sextans Dwarf Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02458","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":"sha256:12c7b6dd20b884aca120a0e3605b9a596f15902843efb76a6e9b4285649b8d3a","target":"record","created_at":"2026-05-17T23:56:40Z","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":"5094fd363ef25df6a3c8a30bf5c103afd7cc4988e21dde397a87fdb15aa6e015","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-01-08T19:00:01Z","title_canon_sha256":"ea0e07dc0f862bdd0ce915c95d404ab3933b7abacb13d1c3a24f6830921edfc3"},"schema_version":"1.0","source":{"id":"1901.02458","kind":"arxiv","version":1}},"canonical_sha256":"7e75430b1bb7301b561503758edc7831fcbd3b6448ad2001b9739c877f7013c6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7e75430b1bb7301b561503758edc7831fcbd3b6448ad2001b9739c877f7013c6","first_computed_at":"2026-05-17T23:56:40.473776Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:40.473776Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nhlg5nKt+31Td45coA+7gx0y38hZpBj0KfDKRtBPrADkFmjm6JUv1i270YrtIYnLoprhx0UkNrJ+TS2AUhynBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:40.474469Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.02458","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12c7b6dd20b884aca120a0e3605b9a596f15902843efb76a6e9b4285649b8d3a","sha256:af7242a8bfc3d2e8f8f0fefa14312812eaffefe4ab7b2018b3b55aa480cb6aad"],"state_sha256":"fdd266870e4ecf267b44496952aa8a4b732b3340f032a005d4d0f9f0cc42bc31"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J2DEKwWvUkW6xX8SIlZX1VZ4zKyxXHmYZ/pxi9jf890AXBPf2jjEZnpAhsb77SYm+ISR+YUua2Qvn1BI8QMGDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-10T22:37:28.872684Z","bundle_sha256":"bba3989f65b9ad91c6ba4707ab949630afa36d97db3c8f4807b600ccc8ee51c3"}}