{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:RJXGP2Q3XG2LLFRBU2YQ6TI736","short_pith_number":"pith:RJXGP2Q3","canonical_record":{"source":{"id":"1910.05360","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-10-11T18:17:56Z","cross_cats_sorted":[],"title_canon_sha256":"61acd18200edc84b7272931373cfcd4e9fe38a68a48ef3da60406c9952e6b457","abstract_canon_sha256":"f135c84bd6dee15f3653279a7cfa317b8a67b2734a57ea823096912247c9a713"},"schema_version":"1.0"},"canonical_sha256":"8a6e67ea1bb9b4b59621a6b10f4d1fdfa094f4903f56bfef36c17cb5c37b2a9b","source":{"kind":"arxiv","id":"1910.05360","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.05360","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"1910.05360v1","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.05360","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"RJXGP2Q3XG2L","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_16","alias_value":"RJXGP2Q3XG2LLFRB","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_8","alias_value":"RJXGP2Q3","created_at":"2026-07-05T00:32:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:RJXGP2Q3XG2LLFRBU2YQ6TI736","target":"record","payload":{"canonical_record":{"source":{"id":"1910.05360","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-10-11T18:17:56Z","cross_cats_sorted":[],"title_canon_sha256":"61acd18200edc84b7272931373cfcd4e9fe38a68a48ef3da60406c9952e6b457","abstract_canon_sha256":"f135c84bd6dee15f3653279a7cfa317b8a67b2734a57ea823096912247c9a713"},"schema_version":"1.0"},"canonical_sha256":"8a6e67ea1bb9b4b59621a6b10f4d1fdfa094f4903f56bfef36c17cb5c37b2a9b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:32:01.068928Z","signature_b64":"6oNaPjpIaULaWzUYvICvn8NTtOzTIFC8fk9pHp6ayEmw65h5N4N3qJLdf7BLniP8QA9ndGOCD39IXdwu+8/wAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a6e67ea1bb9b4b59621a6b10f4d1fdfa094f4903f56bfef36c17cb5c37b2a9b","last_reissued_at":"2026-07-05T00:32:01.068437Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:32:01.068437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1910.05360","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":"2026-07-05T00:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j7ozdQGQjTA7b+kKPspY43dRDivQKO7qMidafZ8FV+i5JBuNyhVKSanuRCbr0veyoGMat5PQPYu9qk6n38O2Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T19:46:16.255247Z"},"content_sha256":"abe5109572e8fcc9dd13762905096925d9beec86da21501be4d448fa02ad3b3b","schema_version":"1.0","event_id":"sha256:abe5109572e8fcc9dd13762905096925d9beec86da21501be4d448fa02ad3b3b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:RJXGP2Q3XG2LLFRBU2YQ6TI736","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectroscopy of the Young Stellar Association Price-Whelan 1: Origin in the Magellanic Leading Arm and Constraints on the Milky Way Hot Halo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Adrian M. Price-Whelan, David Aguado, David L. Nidever, Douglas Boubert, N. Wyn Evans, Rachael L. Beaton, Rana Ezzeddine, Semyeong Oh, Terese T. Hansen, Yumi Choi","submitted_at":"2019-10-11T18:17:56Z","abstract_excerpt":"We report spectroscopic measurements of stars in the recently discovered young stellar association Price-Whelan 1 (PW 1), which was found in the vicinity of the Leading Arm (LA) of the Magellanic Stream. We obtained Magellan+MIKE high-resolution spectra of the 28 brightest stars in PW 1 and used The Cannon to determine their stellar parameters. We find that the mean metallicity of PW 1 is [Fe/H]=-1.23 with a small scatter of 0.06 dex and the mean radial velocity is Vhelio=276.7 km/s with a dispersion of 11.0 km/s. Our results are consistent in Teff, logg, and [Fe/H] with the young and metal-po"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.05360","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/1910.05360/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":"2026-07-05T00:32:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G5LLJGjaVY4XLM4oT40TE5F35mXbefr0f7R8KkUMTTg5/5uHSosAeqjy81303bhH0RlVtvlSmavtoSj4cHosCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T19:46:16.255777Z"},"content_sha256":"fca1cb7290037183f70b15c43ff7fe4bf5ac5232b5e65f0fd316864c97d757eb","schema_version":"1.0","event_id":"sha256:fca1cb7290037183f70b15c43ff7fe4bf5ac5232b5e65f0fd316864c97d757eb"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/bundle.json","state_url":"https://pith.science/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/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":"2026-08-02T19:46:16Z","links":{"resolver":"https://pith.science/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736","bundle":"https://pith.science/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/bundle.json","state":"https://pith.science/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RJXGP2Q3XG2LLFRBU2YQ6TI736/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:RJXGP2Q3XG2LLFRBU2YQ6TI736","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":"f135c84bd6dee15f3653279a7cfa317b8a67b2734a57ea823096912247c9a713","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-10-11T18:17:56Z","title_canon_sha256":"61acd18200edc84b7272931373cfcd4e9fe38a68a48ef3da60406c9952e6b457"},"schema_version":"1.0","source":{"id":"1910.05360","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1910.05360","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"arxiv_version","alias_value":"1910.05360v1","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1910.05360","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_12","alias_value":"RJXGP2Q3XG2L","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_16","alias_value":"RJXGP2Q3XG2LLFRB","created_at":"2026-07-05T00:32:01Z"},{"alias_kind":"pith_short_8","alias_value":"RJXGP2Q3","created_at":"2026-07-05T00:32:01Z"}],"graph_snapshots":[{"event_id":"sha256:fca1cb7290037183f70b15c43ff7fe4bf5ac5232b5e65f0fd316864c97d757eb","target":"graph","created_at":"2026-07-05T00:32:01Z","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/1910.05360/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report spectroscopic measurements of stars in the recently discovered young stellar association Price-Whelan 1 (PW 1), which was found in the vicinity of the Leading Arm (LA) of the Magellanic Stream. We obtained Magellan+MIKE high-resolution spectra of the 28 brightest stars in PW 1 and used The Cannon to determine their stellar parameters. We find that the mean metallicity of PW 1 is [Fe/H]=-1.23 with a small scatter of 0.06 dex and the mean radial velocity is Vhelio=276.7 km/s with a dispersion of 11.0 km/s. Our results are consistent in Teff, logg, and [Fe/H] with the young and metal-po","authors_text":"Adrian M. Price-Whelan, David Aguado, David L. Nidever, Douglas Boubert, N. Wyn Evans, Rachael L. Beaton, Rana Ezzeddine, Semyeong Oh, Terese T. Hansen, Yumi Choi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-10-11T18:17:56Z","title":"Spectroscopy of the Young Stellar Association Price-Whelan 1: Origin in the Magellanic Leading Arm and Constraints on the Milky Way Hot Halo"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1910.05360","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:abe5109572e8fcc9dd13762905096925d9beec86da21501be4d448fa02ad3b3b","target":"record","created_at":"2026-07-05T00:32:01Z","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":"f135c84bd6dee15f3653279a7cfa317b8a67b2734a57ea823096912247c9a713","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-10-11T18:17:56Z","title_canon_sha256":"61acd18200edc84b7272931373cfcd4e9fe38a68a48ef3da60406c9952e6b457"},"schema_version":"1.0","source":{"id":"1910.05360","kind":"arxiv","version":1}},"canonical_sha256":"8a6e67ea1bb9b4b59621a6b10f4d1fdfa094f4903f56bfef36c17cb5c37b2a9b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a6e67ea1bb9b4b59621a6b10f4d1fdfa094f4903f56bfef36c17cb5c37b2a9b","first_computed_at":"2026-07-05T00:32:01.068437Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:32:01.068437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6oNaPjpIaULaWzUYvICvn8NTtOzTIFC8fk9pHp6ayEmw65h5N4N3qJLdf7BLniP8QA9ndGOCD39IXdwu+8/wAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:32:01.068928Z","signed_message":"canonical_sha256_bytes"},"source_id":"1910.05360","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:abe5109572e8fcc9dd13762905096925d9beec86da21501be4d448fa02ad3b3b","sha256:fca1cb7290037183f70b15c43ff7fe4bf5ac5232b5e65f0fd316864c97d757eb"],"state_sha256":"55d7f670146f5d071def8436ff6b868b20de9ae0de3713ba15bbb0b4311de11d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"49YcwvL0iASY3CyKIuyq2GIWwTVNMnd5DAV2HsrcVN2vhfgCZVuG0j8xUqYGJpEmd+X93jH5h6UvQHjcaCKFBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T19:46:16.259293Z","bundle_sha256":"ae4edf873bca6020f10852824004ad02d66a20af198a186d18d47a9c7ce6a60e"}}