{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:GA3BNDUWRF7AA2S4UA3I5MZM3O","short_pith_number":"pith:GA3BNDUW","schema_version":"1.0","canonical_sha256":"3036168e96897e006a5ca0368eb32cdb9f747425acaef41d110ee9e18ba5911e","source":{"kind":"arxiv","id":"0910.4859","version":1},"attestation_state":"computed","paper":{"title":"The progenitor mass of the magnetar SGR1900+14","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Ben Davies (Leeds/RIT), Caltech), Christine Trombley (RIT), Chryssa Kouveliotou (NASA - MSFC), Don F. Figer (RIT), Hawaii), Rolf-Peter Kudritzki (Ifa, Stefanie Wachter (SSC","submitted_at":"2009-10-26T12:10:42Z","abstract_excerpt":"Magnetars are young neutron stars with extreme magnetic fields (B > 10^{14}-10^{15}G). How these fields relate to the properties of their progenitor stars is not yet clearly established. However, from the few objects associated with young clusters it has been possible to estimate the initial masses of the progenitors, with results indicating that a very massive progenitor star (M_prog >40Msun) is required to produce a magnetar. Here we present adaptive-optics assisted Keck/NIRC2 imaging and Keck/NIRSPEC spectroscopy of the cluster associated with the magnetar SGR 1900+14, and report that the i"},"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":"0910.4859","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2009-10-26T12:10:42Z","cross_cats_sorted":["astro-ph.GA","astro-ph.HE"],"title_canon_sha256":"97fd4e97b30619eb19fb1ccb8cc2c0a9daa3623965badbf63f27c53f21ebd71e","abstract_canon_sha256":"5142c84b958089e162d927bd642c7c3f99fc3bcc273f376e449eeb518d66ddf8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:34:12.881496Z","signature_b64":"lz9Kv5Y5Jcftyq2tzGoyyuqzwxHNTzVYhzNTfHTI46frw9hCf+dHKZT0n72IUqivCT4UGmsyusUyj2NykBf8Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3036168e96897e006a5ca0368eb32cdb9f747425acaef41d110ee9e18ba5911e","last_reissued_at":"2026-05-18T02:34:12.881097Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:34:12.881097Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The progenitor mass of the magnetar SGR1900+14","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Ben Davies (Leeds/RIT), Caltech), Christine Trombley (RIT), Chryssa Kouveliotou (NASA - MSFC), Don F. Figer (RIT), Hawaii), Rolf-Peter Kudritzki (Ifa, Stefanie Wachter (SSC","submitted_at":"2009-10-26T12:10:42Z","abstract_excerpt":"Magnetars are young neutron stars with extreme magnetic fields (B > 10^{14}-10^{15}G). How these fields relate to the properties of their progenitor stars is not yet clearly established. However, from the few objects associated with young clusters it has been possible to estimate the initial masses of the progenitors, with results indicating that a very massive progenitor star (M_prog >40Msun) is required to produce a magnetar. Here we present adaptive-optics assisted Keck/NIRC2 imaging and Keck/NIRSPEC spectroscopy of the cluster associated with the magnetar SGR 1900+14, and report that the i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.4859","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":"0910.4859","created_at":"2026-05-18T02:34:12.881160+00:00"},{"alias_kind":"arxiv_version","alias_value":"0910.4859v1","created_at":"2026-05-18T02:34:12.881160+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.4859","created_at":"2026-05-18T02:34:12.881160+00:00"},{"alias_kind":"pith_short_12","alias_value":"GA3BNDUWRF7A","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"GA3BNDUWRF7AA2S4","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"GA3BNDUW","created_at":"2026-05-18T12:25:59.703012+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/GA3BNDUWRF7AA2S4UA3I5MZM3O","json":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O.json","graph_json":"https://pith.science/api/pith-number/GA3BNDUWRF7AA2S4UA3I5MZM3O/graph.json","events_json":"https://pith.science/api/pith-number/GA3BNDUWRF7AA2S4UA3I5MZM3O/events.json","paper":"https://pith.science/paper/GA3BNDUW"},"agent_actions":{"view_html":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O","download_json":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O.json","view_paper":"https://pith.science/paper/GA3BNDUW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0910.4859&json=true","fetch_graph":"https://pith.science/api/pith-number/GA3BNDUWRF7AA2S4UA3I5MZM3O/graph.json","fetch_events":"https://pith.science/api/pith-number/GA3BNDUWRF7AA2S4UA3I5MZM3O/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O/action/storage_attestation","attest_author":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O/action/author_attestation","sign_citation":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O/action/citation_signature","submit_replication":"https://pith.science/pith/GA3BNDUWRF7AA2S4UA3I5MZM3O/action/replication_record"}},"created_at":"2026-05-18T02:34:12.881160+00:00","updated_at":"2026-05-18T02:34:12.881160+00:00"}