{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:2U2LMHW7UPW7YNEASTBRBSFVG2","short_pith_number":"pith:2U2LMHW7","schema_version":"1.0","canonical_sha256":"d534b61edfa3edfc348094c310c8b536b5eeca5b78e969ec295bfdfb62185904","source":{"kind":"arxiv","id":"1808.09455","version":1},"attestation_state":"computed","paper":{"title":"New constraints on the nature and origin of the Leading Arm of the Magellanic Stream","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.J. Fox, B.P. Wakker, E. D'Onghia, F.J. Lockman, J.C. Howk, K.A. Barger, N. Lehner, P. Richter","submitted_at":"2018-08-28T18:00:02Z","abstract_excerpt":"We present a new precision measurement of gas-phase abundances of S, O, N, Si, Fe, P, Al, Ca as well as molecular hydrogen (H_2) in the Leading Arm (region II, LAII) of the Magellanic Stream (MS) towards the Seyfert galaxy NGC 3783. The results are based on high-quality archival ultraviolet/optical/radio data from various different instruments (HST/STIS, FUSE, AAT, GBT, GB140ft, ATCA). Our study updates previous results from lower-resolution data and provides for the first time a self-consistent component model of the complex multi-phase absorber, delivering important constraints on the nature"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1808.09455","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-08-28T18:00:02Z","cross_cats_sorted":[],"title_canon_sha256":"567b73e4b56ff8209fbf03635622de1c0ad8cc938df58f890f2fb08dc3dcc5ea","abstract_canon_sha256":"5f0e64b712ddd97776aa663e598a1d340747ef2fdc6dd6ba9244fdc979d882ce"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:03:15.182432Z","signature_b64":"XyImtkyuLWTGY2iaomMqDkiP6GgXTenOii/589c9ESmiu7PHv7tKE+GsqGGQUJAPLHmgRpGfBU7ESVnDaQI3CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d534b61edfa3edfc348094c310c8b536b5eeca5b78e969ec295bfdfb62185904","last_reissued_at":"2026-05-18T00:03:15.181892Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:03:15.181892Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"New constraints on the nature and origin of the Leading Arm of the Magellanic Stream","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A.J. Fox, B.P. Wakker, E. D'Onghia, F.J. Lockman, J.C. Howk, K.A. Barger, N. Lehner, P. Richter","submitted_at":"2018-08-28T18:00:02Z","abstract_excerpt":"We present a new precision measurement of gas-phase abundances of S, O, N, Si, Fe, P, Al, Ca as well as molecular hydrogen (H_2) in the Leading Arm (region II, LAII) of the Magellanic Stream (MS) towards the Seyfert galaxy NGC 3783. The results are based on high-quality archival ultraviolet/optical/radio data from various different instruments (HST/STIS, FUSE, AAT, GBT, GB140ft, ATCA). Our study updates previous results from lower-resolution data and provides for the first time a self-consistent component model of the complex multi-phase absorber, delivering important constraints on the nature"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.09455","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1808.09455","created_at":"2026-05-18T00:03:15.181971+00:00"},{"alias_kind":"arxiv_version","alias_value":"1808.09455v1","created_at":"2026-05-18T00:03:15.181971+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.09455","created_at":"2026-05-18T00:03:15.181971+00:00"},{"alias_kind":"pith_short_12","alias_value":"2U2LMHW7UPW7","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_16","alias_value":"2U2LMHW7UPW7YNEA","created_at":"2026-05-18T12:32:02.567920+00:00"},{"alias_kind":"pith_short_8","alias_value":"2U2LMHW7","created_at":"2026-05-18T12:32:02.567920+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2","json":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2.json","graph_json":"https://pith.science/api/pith-number/2U2LMHW7UPW7YNEASTBRBSFVG2/graph.json","events_json":"https://pith.science/api/pith-number/2U2LMHW7UPW7YNEASTBRBSFVG2/events.json","paper":"https://pith.science/paper/2U2LMHW7"},"agent_actions":{"view_html":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2","download_json":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2.json","view_paper":"https://pith.science/paper/2U2LMHW7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1808.09455&json=true","fetch_graph":"https://pith.science/api/pith-number/2U2LMHW7UPW7YNEASTBRBSFVG2/graph.json","fetch_events":"https://pith.science/api/pith-number/2U2LMHW7UPW7YNEASTBRBSFVG2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2/action/storage_attestation","attest_author":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2/action/author_attestation","sign_citation":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2/action/citation_signature","submit_replication":"https://pith.science/pith/2U2LMHW7UPW7YNEASTBRBSFVG2/action/replication_record"}},"created_at":"2026-05-18T00:03:15.181971+00:00","updated_at":"2026-05-18T00:03:15.181971+00:00"}