{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:HPKBF7VMP6ZSNP4ELZVFCBRWDD","short_pith_number":"pith:HPKBF7VM","canonical_record":{"source":{"id":"1903.05565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-13T16:05:31Z","cross_cats_sorted":[],"title_canon_sha256":"af43b8236397f760a3811b42d368dee56402fa67211f54def3d4bc892a5201a4","abstract_canon_sha256":"89485f7da6cbf3b9fe38e0fd1305f6429092969d1f2fa541b73a322636c9cad5"},"schema_version":"1.0"},"canonical_sha256":"3bd412feac7fb326bf845e6a51063618c732f61f976db18ca6c866ade919c63f","source":{"kind":"arxiv","id":"1903.05565","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05565","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05565v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05565","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"HPKBF7VMP6ZS","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HPKBF7VMP6ZSNP4E","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HPKBF7VM","created_at":"2026-05-18T12:33:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:HPKBF7VMP6ZSNP4ELZVFCBRWDD","target":"record","payload":{"canonical_record":{"source":{"id":"1903.05565","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-13T16:05:31Z","cross_cats_sorted":[],"title_canon_sha256":"af43b8236397f760a3811b42d368dee56402fa67211f54def3d4bc892a5201a4","abstract_canon_sha256":"89485f7da6cbf3b9fe38e0fd1305f6429092969d1f2fa541b73a322636c9cad5"},"schema_version":"1.0"},"canonical_sha256":"3bd412feac7fb326bf845e6a51063618c732f61f976db18ca6c866ade919c63f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:25.359363Z","signature_b64":"0B4bl0BLytoXqFQocFZAQuV0uYutWcc0LWpHYpejCyDj3RJTLLW5jkmBMzrhrXNciDiuE9rU/lbxFtgAK0TBBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3bd412feac7fb326bf845e6a51063618c732f61f976db18ca6c866ade919c63f","last_reissued_at":"2026-05-17T23:47:25.358736Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:25.358736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.05565","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":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1N7lDdkdfQB49DelMqHUJ90eRYkWpCA0BIAVNwodz4Mw/ra3cnUj/mPLxiEwsGwXK2OZjhfQFJde3QuiXv39AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:35:34.738046Z"},"content_sha256":"1a77aa0885309f9677421a1698d980914453e2e5ad6c07134cf1e49b92c19f79","schema_version":"1.0","event_id":"sha256:1a77aa0885309f9677421a1698d980914453e2e5ad6c07134cf1e49b92c19f79"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:HPKBF7VMP6ZSNP4ELZVFCBRWDD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Four Metal-poor Stars in the Sagittarius Dwarf Spheroidal Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anirudh Chiti, Anna Frebel","submitted_at":"2019-03-13T16:05:31Z","abstract_excerpt":"We present the metallicities and carbon abundances of four newly discovered metal-poor stars with $ -2.2 <$ [Fe/H] $< -1.6$ in the Sagittarius dwarf spheroidal galaxy. These stars were selected as metal-poor member candidates using a combination of public photometry from the SkyMapper Southern Sky Survey and proper motion data from the second data release from the Gaia mission. The SkyMapper filters include a metallicity-sensitive narrow-band $v$ filter centered on the Ca II K line, which we use to identify metal-poor candidates. In tandem, we use proper motion data to remove metal-poor stars "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05565","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":"2026-05-17T23:47:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qn8SDMaMGB6YGOBI5Oh2XhLOqcHPCFd73rVqlQ4MuRCg8VqFWXmmchC4Q+t19Zl0BJ6euYcCI58FQcC91HRXDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T08:35:34.738397Z"},"content_sha256":"56a871dbfb70f2b01a3ef55e1554c511ffd9fc6db61c62ddd55d2e095d339e7a","schema_version":"1.0","event_id":"sha256:56a871dbfb70f2b01a3ef55e1554c511ffd9fc6db61c62ddd55d2e095d339e7a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/bundle.json","state_url":"https://pith.science/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/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":"2026-05-28T08:35:34Z","links":{"resolver":"https://pith.science/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD","bundle":"https://pith.science/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/bundle.json","state":"https://pith.science/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HPKBF7VMP6ZSNP4ELZVFCBRWDD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:HPKBF7VMP6ZSNP4ELZVFCBRWDD","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":"89485f7da6cbf3b9fe38e0fd1305f6429092969d1f2fa541b73a322636c9cad5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-13T16:05:31Z","title_canon_sha256":"af43b8236397f760a3811b42d368dee56402fa67211f54def3d4bc892a5201a4"},"schema_version":"1.0","source":{"id":"1903.05565","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.05565","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"arxiv_version","alias_value":"1903.05565v1","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.05565","created_at":"2026-05-17T23:47:25Z"},{"alias_kind":"pith_short_12","alias_value":"HPKBF7VMP6ZS","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_16","alias_value":"HPKBF7VMP6ZSNP4E","created_at":"2026-05-18T12:33:18Z"},{"alias_kind":"pith_short_8","alias_value":"HPKBF7VM","created_at":"2026-05-18T12:33:18Z"}],"graph_snapshots":[{"event_id":"sha256:56a871dbfb70f2b01a3ef55e1554c511ffd9fc6db61c62ddd55d2e095d339e7a","target":"graph","created_at":"2026-05-17T23:47:25Z","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 present the metallicities and carbon abundances of four newly discovered metal-poor stars with $ -2.2 <$ [Fe/H] $< -1.6$ in the Sagittarius dwarf spheroidal galaxy. These stars were selected as metal-poor member candidates using a combination of public photometry from the SkyMapper Southern Sky Survey and proper motion data from the second data release from the Gaia mission. The SkyMapper filters include a metallicity-sensitive narrow-band $v$ filter centered on the Ca II K line, which we use to identify metal-poor candidates. In tandem, we use proper motion data to remove metal-poor stars ","authors_text":"Anirudh Chiti, Anna Frebel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-13T16:05:31Z","title":"Four Metal-poor Stars in the Sagittarius Dwarf Spheroidal Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.05565","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":"sha256:1a77aa0885309f9677421a1698d980914453e2e5ad6c07134cf1e49b92c19f79","target":"record","created_at":"2026-05-17T23:47:25Z","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":"89485f7da6cbf3b9fe38e0fd1305f6429092969d1f2fa541b73a322636c9cad5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-03-13T16:05:31Z","title_canon_sha256":"af43b8236397f760a3811b42d368dee56402fa67211f54def3d4bc892a5201a4"},"schema_version":"1.0","source":{"id":"1903.05565","kind":"arxiv","version":1}},"canonical_sha256":"3bd412feac7fb326bf845e6a51063618c732f61f976db18ca6c866ade919c63f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3bd412feac7fb326bf845e6a51063618c732f61f976db18ca6c866ade919c63f","first_computed_at":"2026-05-17T23:47:25.358736Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:25.358736Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0B4bl0BLytoXqFQocFZAQuV0uYutWcc0LWpHYpejCyDj3RJTLLW5jkmBMzrhrXNciDiuE9rU/lbxFtgAK0TBBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:25.359363Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.05565","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a77aa0885309f9677421a1698d980914453e2e5ad6c07134cf1e49b92c19f79","sha256:56a871dbfb70f2b01a3ef55e1554c511ffd9fc6db61c62ddd55d2e095d339e7a"],"state_sha256":"d4655417b857a6871ab736f964078c4bfff9bb7c6e4d9e109e9e6b496b458eac"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"r4RfJzVe3ncKEc3zZYKfd9mRbn1V3NOKICSBBwap3fCe9AiBFCFKAUfC6ovf13nlDhmRzGEJzE7i8fIDOmsnBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T08:35:34.740269Z","bundle_sha256":"fe781df49c7241b42db2a1f3cfa3759e9010ffdcd85f5fba59318d2f794235ac"}}