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Although this scaling relation has been firmly established for long gamma-ray bursts (lGRBs), systematic investigations for short GRBs (sGRBs) remain absent, leaving the physical differences between the two populations poorly constrained. Here we analyze 33 Swift sGRBs exhibiting prominent X-ray plateaus from newborn millisecond magnetar spin-down, and derive their initial spin period $P_0$ and polar magnetic field $B_p$. sGRB magnetars span $P_0 \\in [1.73,\\,18.28]\\ \\mathrm{ms}$ and $B_p \\in [0.06,\\,2.82] \\time"},"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":"2607.18698","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2026-07-21T04:35:09Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"f897467e876252b328d77cf4dd99723f2faca84d4f341f940c955748c09a0c2b","abstract_canon_sha256":"d1635594cefd0adcefe2fab1f6db172ccee12e102f4af95fa3eb44c33732dbe8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-22T01:23:07.273815Z","signature_b64":"Q8KXTEQGcfnnfAywjU7JL41/XjtZLwRIztE1ayDJ4nqj0VOZps+orjBUbvkSjP3RqQdNq/MevGnOoLhCWClzCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"16eaf87d3ec711d440d98e81b70c76d2462af659e22239ec043d6e214ac70aca","last_reissued_at":"2026-07-22T01:23:07.273023Z","signature_status":"signed_v1","first_computed_at":"2026-07-22T01:23:07.273023Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Universal scaling between magnetar field and initial spin period for short gamma ray bursts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"astro-ph.HE","authors_text":"Fu-Xing Li, Jing Li, Li-Yin Zhu, Ming Lian, Qi-Bin Sun, Qin-Mei Li, Sheng-Bang Qian, Si-Yuan Zhu","submitted_at":"2026-07-21T04:35:09Z","abstract_excerpt":"The $B_p$--$P_0$ correlation serves as a critical probe of magnetar engine physics. 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Here we analyze 33 Swift sGRBs exhibiting prominent X-ray plateaus from newborn millisecond magnetar spin-down, and derive their initial spin period $P_0$ and polar magnetic field $B_p$. sGRB magnetars span $P_0 \\in [1.73,\\,18.28]\\ \\mathrm{ms}$ and $B_p \\in [0.06,\\,2.82] \\time"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.18698","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/2607.18698/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2607.18698","created_at":"2026-07-22T01:23:07.273459+00:00"},{"alias_kind":"arxiv_version","alias_value":"2607.18698v1","created_at":"2026-07-22T01:23:07.273459+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.18698","created_at":"2026-07-22T01:23:07.273459+00:00"},{"alias_kind":"pith_short_12","alias_value":"C3VPQ7J6Y4I5","created_at":"2026-07-22T01:23:07.273459+00:00"},{"alias_kind":"pith_short_16","alias_value":"C3VPQ7J6Y4I5IQGZ","created_at":"2026-07-22T01:23:07.273459+00:00"},{"alias_kind":"pith_short_8","alias_value":"C3VPQ7J6","created_at":"2026-07-22T01:23:07.273459+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/C3VPQ7J6Y4I5IQGZR2A3ODDW2J","json":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J.json","graph_json":"https://pith.science/api/pith-number/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/graph.json","events_json":"https://pith.science/api/pith-number/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/events.json","paper":"https://pith.science/paper/C3VPQ7J6"},"agent_actions":{"view_html":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J","download_json":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J.json","view_paper":"https://pith.science/paper/C3VPQ7J6","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2607.18698&json=true","fetch_graph":"https://pith.science/api/pith-number/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/graph.json","fetch_events":"https://pith.science/api/pith-number/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/action/timestamp_anchor","attest_storage":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/action/storage_attestation","attest_author":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/action/author_attestation","sign_citation":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/action/citation_signature","submit_replication":"https://pith.science/pith/C3VPQ7J6Y4I5IQGZR2A3ODDW2J/action/replication_record"}},"created_at":"2026-07-22T01:23:07.273459+00:00","updated_at":"2026-07-22T01:23:07.273459+00:00"}