{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:QWQ3KFYV5T427T4RBNQUUPCZOF","short_pith_number":"pith:QWQ3KFYV","canonical_record":{"source":{"id":"1812.00198","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-01T12:22:04Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"820a1c736e18c6aead1fe0ef03d4a41e5a9eebf532e0ef39d99d11ced2b905e6","abstract_canon_sha256":"6f95bc84ee87792581d06b62284ca4a33b0f17bc37f614dfad6cace98c334e0b"},"schema_version":"1.0"},"canonical_sha256":"85a1b51715ecf9afcf910b614a3c597164565dab84c2d1f153fd7368c45fa90f","source":{"kind":"arxiv","id":"1812.00198","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.00198","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1812.00198v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.00198","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"QWQ3KFYV5T42","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QWQ3KFYV5T427T4R","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QWQ3KFYV","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:QWQ3KFYV5T427T4RBNQUUPCZOF","target":"record","payload":{"canonical_record":{"source":{"id":"1812.00198","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-01T12:22:04Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"820a1c736e18c6aead1fe0ef03d4a41e5a9eebf532e0ef39d99d11ced2b905e6","abstract_canon_sha256":"6f95bc84ee87792581d06b62284ca4a33b0f17bc37f614dfad6cace98c334e0b"},"schema_version":"1.0"},"canonical_sha256":"85a1b51715ecf9afcf910b614a3c597164565dab84c2d1f153fd7368c45fa90f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:10.812067Z","signature_b64":"VkrBL2EO2l74VTVunlzny10sXyH65CUbPaZGpr6o+3QDqBrimoq9HSiZLrdNfKpmga/rH8W36qRDin7jJbm+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"85a1b51715ecf9afcf910b614a3c597164565dab84c2d1f153fd7368c45fa90f","last_reissued_at":"2026-05-17T23:55:10.811473Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:10.811473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.00198","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wcvazoz1DWmtjfqikhRJdTbrjRSb1X/h+zSgRWgybhmI0iWcLobeAgx1CpA02wPTQbl4XHhSp7PJMzdUEY3wAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:27:30.206154Z"},"content_sha256":"72ec573ddbc3c0d58f21afbadc67c0494fe7593bd72679c3cbfe696bcd4824cf","schema_version":"1.0","event_id":"sha256:72ec573ddbc3c0d58f21afbadc67c0494fe7593bd72679c3cbfe696bcd4824cf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:QWQ3KFYV5T427T4RBNQUUPCZOF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Origins of Young Stars in the Direction of the Leading Arm of the Magellanic Stream: Abundances, Kinematics, and Orbits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Christian Moni Bidin, Dana I. Casetti-Dinescu, Gang Zhao, Katherine Vieira, Lan Zhang, Rene A. Mendez, Terrence M. Girard, Vladimir I. Korchagin, William F. van Altena","submitted_at":"2018-12-01T12:22:04Z","abstract_excerpt":"We explore the origins of the young B-type stars found by Casetti-Dinescu et al.(2014) at the outskirts of the Milky-Way disk in the sky region of Leading Arm of the Magellanic Stream. High-resolution spectroscopic observations made with the MIKE instrument on the Magellan Clay 6.5m telescope for nine stars are added to the previous sample analyzed by Zhang et al. (2017). We compile a sample of fifteen young stars with well-determined stellar types, ages, abundances and kinematics. With proper motions from Gaia DR2 we also derive orbits in a realistic Milky-Way potential. We find that our prev"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.00198","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":"2026-05-17T23:55:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/111nTy2LpN5g4T5+HGVVDwD59l0agWy3YqoJKhJejpmANGksQrnp5SjV0EKEkItvqNsZo0AjjxfO9oN2j2rBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T17:27:30.206848Z"},"content_sha256":"f49e840da741fcf588d4f12796954f2804b9f1033ef772b34aa1d58db7251630","schema_version":"1.0","event_id":"sha256:f49e840da741fcf588d4f12796954f2804b9f1033ef772b34aa1d58db7251630"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/bundle.json","state_url":"https://pith.science/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/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":"2026-05-28T17:27:30Z","links":{"resolver":"https://pith.science/pith/QWQ3KFYV5T427T4RBNQUUPCZOF","bundle":"https://pith.science/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/bundle.json","state":"https://pith.science/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QWQ3KFYV5T427T4RBNQUUPCZOF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:QWQ3KFYV5T427T4RBNQUUPCZOF","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":"6f95bc84ee87792581d06b62284ca4a33b0f17bc37f614dfad6cace98c334e0b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-01T12:22:04Z","title_canon_sha256":"820a1c736e18c6aead1fe0ef03d4a41e5a9eebf532e0ef39d99d11ced2b905e6"},"schema_version":"1.0","source":{"id":"1812.00198","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.00198","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"arxiv_version","alias_value":"1812.00198v1","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.00198","created_at":"2026-05-17T23:55:10Z"},{"alias_kind":"pith_short_12","alias_value":"QWQ3KFYV5T42","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"QWQ3KFYV5T427T4R","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"QWQ3KFYV","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:f49e840da741fcf588d4f12796954f2804b9f1033ef772b34aa1d58db7251630","target":"graph","created_at":"2026-05-17T23:55:10Z","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 explore the origins of the young B-type stars found by Casetti-Dinescu et al.(2014) at the outskirts of the Milky-Way disk in the sky region of Leading Arm of the Magellanic Stream. High-resolution spectroscopic observations made with the MIKE instrument on the Magellan Clay 6.5m telescope for nine stars are added to the previous sample analyzed by Zhang et al. (2017). We compile a sample of fifteen young stars with well-determined stellar types, ages, abundances and kinematics. With proper motions from Gaia DR2 we also derive orbits in a realistic Milky-Way potential. We find that our prev","authors_text":"Christian Moni Bidin, Dana I. Casetti-Dinescu, Gang Zhao, Katherine Vieira, Lan Zhang, Rene A. Mendez, Terrence M. Girard, Vladimir I. Korchagin, William F. van Altena","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-01T12:22:04Z","title":"The Origins of Young Stars in the Direction of the Leading Arm of the Magellanic Stream: Abundances, Kinematics, and Orbits"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.00198","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":"sha256:72ec573ddbc3c0d58f21afbadc67c0494fe7593bd72679c3cbfe696bcd4824cf","target":"record","created_at":"2026-05-17T23:55:10Z","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":"6f95bc84ee87792581d06b62284ca4a33b0f17bc37f614dfad6cace98c334e0b","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-12-01T12:22:04Z","title_canon_sha256":"820a1c736e18c6aead1fe0ef03d4a41e5a9eebf532e0ef39d99d11ced2b905e6"},"schema_version":"1.0","source":{"id":"1812.00198","kind":"arxiv","version":1}},"canonical_sha256":"85a1b51715ecf9afcf910b614a3c597164565dab84c2d1f153fd7368c45fa90f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"85a1b51715ecf9afcf910b614a3c597164565dab84c2d1f153fd7368c45fa90f","first_computed_at":"2026-05-17T23:55:10.811473Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:10.811473Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VkrBL2EO2l74VTVunlzny10sXyH65CUbPaZGpr6o+3QDqBrimoq9HSiZLrdNfKpmga/rH8W36qRDin7jJbm+Bw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:10.812067Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.00198","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72ec573ddbc3c0d58f21afbadc67c0494fe7593bd72679c3cbfe696bcd4824cf","sha256:f49e840da741fcf588d4f12796954f2804b9f1033ef772b34aa1d58db7251630"],"state_sha256":"cdb21f7c6eb4ad6773b29665c803b97ec4e39f83d00ac9186d5381dfc1c7a85c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tnkqQyquBHoYACH+/DuDJVF6h8iK4WjIhN2rrl2BgOwYAMS2gMzRFl7uQo2ClroNuo2urz7CMKdzFvu+pEhyDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T17:27:30.210737Z","bundle_sha256":"e514f0894590d10790667a64005f23c20ecabbb75be4681511770794a6ebda7d"}}