{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:26P35X6M3GKDL4653ALGDHW57E","short_pith_number":"pith:26P35X6M","canonical_record":{"source":{"id":"1902.02780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T18:59:59Z","cross_cats_sorted":[],"title_canon_sha256":"cf84d5ccbf2705c3d6447e5cee224ebb2f6c367c368358ae4742ee1290adb171","abstract_canon_sha256":"ef168256d6815d5b00b4cd3408d0a4ab1a536d997b98f6395e88611a6832c2bd"},"schema_version":"1.0"},"canonical_sha256":"d79fbedfccd99435f3ddd816619eddf9132a558a33c001f7ba755fee5f30e536","source":{"kind":"arxiv","id":"1902.02780","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02780","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02780v1","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02780","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_12","alias_value":"26P35X6M3GKD","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_16","alias_value":"26P35X6M3GKDL465","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_8","alias_value":"26P35X6M","created_at":"2026-07-05T00:13:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:26P35X6M3GKDL4653ALGDHW57E","target":"record","payload":{"canonical_record":{"source":{"id":"1902.02780","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T18:59:59Z","cross_cats_sorted":[],"title_canon_sha256":"cf84d5ccbf2705c3d6447e5cee224ebb2f6c367c368358ae4742ee1290adb171","abstract_canon_sha256":"ef168256d6815d5b00b4cd3408d0a4ab1a536d997b98f6395e88611a6832c2bd"},"schema_version":"1.0"},"canonical_sha256":"d79fbedfccd99435f3ddd816619eddf9132a558a33c001f7ba755fee5f30e536","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:13:41.520165Z","signature_b64":"idrqdTk/T+flKnh0P7u3TQJhJ45XafCvFfXHWF+V5N1y6jfJRusgLV8gvQcSH0kN960gI7EBIsWyG1iCG6ibBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d79fbedfccd99435f3ddd816619eddf9132a558a33c001f7ba755fee5f30e536","last_reissued_at":"2026-07-05T00:13:41.519749Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:13:41.519749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.02780","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":"2026-07-05T00:13:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fVhA6DP20/gru/EJYM8HZN3uRYEVeN3+TDaU9Z++IzhSaaK90VgJKOkgEQnk94LLy9LrYEIvxQg4mMloF0iqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:05:56.429409Z"},"content_sha256":"ece544f0df53864d6c9b5f5e221bd22a646e3cb2514a12c118bf151d784a6d8c","schema_version":"1.0","event_id":"sha256:ece544f0df53864d6c9b5f5e221bd22a646e3cb2514a12c118bf151d784a6d8c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:26P35X6M3GKDL4653ALGDHW57E","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Pristine Dwarf-Galaxy survey - II. In-depth observational study of the faint Milky Way satellite Sagittarius II","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Anke Arentsen, Benjamin P. M. Laevens, David S. Aguado, Dougal Mackey, Else Starkenburg, Jonay I. Gonzalez Hernandez, Julio F. Navarro, Michelle L. M. Collins, Nicolas Longeard, Nicolas Martin, Pascale Jablonka, R. Michael Rich, Rodrigo A. Ibata, Ruben Sanchez-Janssen","submitted_at":"2019-02-07T18:59:59Z","abstract_excerpt":"We present an extensive study of the Sagittarius II (Sgr II) stellar system using MegaCam g and i photometry, narrow-band, metallicity-sensitive Calcium H&K doublet photometry, augmented with Keck II/DEIMOS multi-object spectroscopy. We are able to derive and refine the Sgr II structural and stellar properties: the colour-magnitude diagram implies Sgr II is old (12.0 +- 0.5 Gyr) and metal-poor. The CaHK photometry confirms the metal-poor nature of the satellite ([Fe/H]CaHK = -2.32 +- 0.04 dex) and suggests that Sgr II hosts more than one single stellar population ({\\sigma} CaHK = 0.11+0.05-0.0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02780","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/1902.02780/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":"2026-07-05T00:13:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wg425W5xRVpVm9wFOd2HntPpfk9+1qKAMa8mJ9G7ZepwNkWG7ndO6LeYbTChEGGwaM7pmuDZwcqTIo91I+PNAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:05:56.429944Z"},"content_sha256":"8b507f93e9268a143ce303b77626ba4e88cd9c71878b95e482347fa7d45c5b91","schema_version":"1.0","event_id":"sha256:8b507f93e9268a143ce303b77626ba4e88cd9c71878b95e482347fa7d45c5b91"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/26P35X6M3GKDL4653ALGDHW57E/bundle.json","state_url":"https://pith.science/pith/26P35X6M3GKDL4653ALGDHW57E/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/26P35X6M3GKDL4653ALGDHW57E/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":"2026-08-05T22:05:56Z","links":{"resolver":"https://pith.science/pith/26P35X6M3GKDL4653ALGDHW57E","bundle":"https://pith.science/pith/26P35X6M3GKDL4653ALGDHW57E/bundle.json","state":"https://pith.science/pith/26P35X6M3GKDL4653ALGDHW57E/state.json","well_known_bundle":"https://pith.science/.well-known/pith/26P35X6M3GKDL4653ALGDHW57E/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:26P35X6M3GKDL4653ALGDHW57E","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":"ef168256d6815d5b00b4cd3408d0a4ab1a536d997b98f6395e88611a6832c2bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T18:59:59Z","title_canon_sha256":"cf84d5ccbf2705c3d6447e5cee224ebb2f6c367c368358ae4742ee1290adb171"},"schema_version":"1.0","source":{"id":"1902.02780","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.02780","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"arxiv_version","alias_value":"1902.02780v1","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.02780","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_12","alias_value":"26P35X6M3GKD","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_16","alias_value":"26P35X6M3GKDL465","created_at":"2026-07-05T00:13:41Z"},{"alias_kind":"pith_short_8","alias_value":"26P35X6M","created_at":"2026-07-05T00:13:41Z"}],"graph_snapshots":[{"event_id":"sha256:8b507f93e9268a143ce303b77626ba4e88cd9c71878b95e482347fa7d45c5b91","target":"graph","created_at":"2026-07-05T00:13:41Z","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/1902.02780/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an extensive study of the Sagittarius II (Sgr II) stellar system using MegaCam g and i photometry, narrow-band, metallicity-sensitive Calcium H&K doublet photometry, augmented with Keck II/DEIMOS multi-object spectroscopy. We are able to derive and refine the Sgr II structural and stellar properties: the colour-magnitude diagram implies Sgr II is old (12.0 +- 0.5 Gyr) and metal-poor. The CaHK photometry confirms the metal-poor nature of the satellite ([Fe/H]CaHK = -2.32 +- 0.04 dex) and suggests that Sgr II hosts more than one single stellar population ({\\sigma} CaHK = 0.11+0.05-0.0","authors_text":"Anke Arentsen, Benjamin P. M. Laevens, David S. Aguado, Dougal Mackey, Else Starkenburg, Jonay I. Gonzalez Hernandez, Julio F. Navarro, Michelle L. M. Collins, Nicolas Longeard, Nicolas Martin, Pascale Jablonka, R. Michael Rich, Rodrigo A. Ibata, Ruben Sanchez-Janssen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T18:59:59Z","title":"The Pristine Dwarf-Galaxy survey - II. In-depth observational study of the faint Milky Way satellite Sagittarius II"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.02780","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:ece544f0df53864d6c9b5f5e221bd22a646e3cb2514a12c118bf151d784a6d8c","target":"record","created_at":"2026-07-05T00:13:41Z","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":"ef168256d6815d5b00b4cd3408d0a4ab1a536d997b98f6395e88611a6832c2bd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-02-07T18:59:59Z","title_canon_sha256":"cf84d5ccbf2705c3d6447e5cee224ebb2f6c367c368358ae4742ee1290adb171"},"schema_version":"1.0","source":{"id":"1902.02780","kind":"arxiv","version":1}},"canonical_sha256":"d79fbedfccd99435f3ddd816619eddf9132a558a33c001f7ba755fee5f30e536","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d79fbedfccd99435f3ddd816619eddf9132a558a33c001f7ba755fee5f30e536","first_computed_at":"2026-07-05T00:13:41.519749Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:13:41.519749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"idrqdTk/T+flKnh0P7u3TQJhJ45XafCvFfXHWF+V5N1y6jfJRusgLV8gvQcSH0kN960gI7EBIsWyG1iCG6ibBA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:13:41.520165Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.02780","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ece544f0df53864d6c9b5f5e221bd22a646e3cb2514a12c118bf151d784a6d8c","sha256:8b507f93e9268a143ce303b77626ba4e88cd9c71878b95e482347fa7d45c5b91"],"state_sha256":"86bec3b6c4507cd2c56c68cffdc443747b92d88b295a2534ca5499e8a70b2772"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wf+yfP1DLVrw/ivKcEuVoPqiG8/hapJ9zaAY4pzR13ZqU7AP5OSHkhHzHvDmtqLuS36p9LxqWJ18W5A7RLgqDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:05:56.434950Z","bundle_sha256":"eff16b4bbc5705d3f1488d40e0914c4809c50d6b040e8d0a0d81e695b33258c4"}}