{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:4APSFVZ7C53HINY36ZVIMQD3SZ","short_pith_number":"pith:4APSFVZ7","schema_version":"1.0","canonical_sha256":"e01f22d73f177674371bf66a86407b967b6624b35773c98dd9c01a8a760d76a8","source":{"kind":"arxiv","id":"2302.13061","version":1},"attestation_state":"computed","paper":{"title":"Non-LTE analysis for Helium and Strontium lines in the kilonova AT2017gfo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Kenta Hotokezaka, Masaomi Tanaka, Nanae Domoto, Yuta Tarumi","submitted_at":"2023-02-25T11:11:18Z","abstract_excerpt":"Kilonova spectra imprint valuable information about the elements synthesized in neutron star mergers. In AT2017gfo, the kilonova associated with GW170817, the spectroscopic feature centered around 8000 angstroms has been interpreted as the P-Cygni profile arising from singly ionized Strontium. Recently, Perego et al. (2022) suggested that Helium 10833 line can be an alternative explanation of the feature. Here, we study the line features under non-local thermodynamic equilibrium. We find that the ionization of ejecta by the stopping of radioactive decay product can significantly enhance the io"},"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":"2302.13061","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2023-02-25T11:11:18Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"24899ab350386317a797b60bd6b5596ff3a8f43cda0b9b02a9d3ba59d55b3aef","abstract_canon_sha256":"83d452dbe6e5c3d07a07fb005177becf8c23a7aea76d25008cb47d5c532b49d6"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:45:42.846925Z","signature_b64":"riXw+lxR859KCGawZC4McDxhhUSsz0PTZjggUCKZjxboKhHcQLfuAg3GmVzkLSDK/+c5UnoxmfZ32VCFm/EBDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e01f22d73f177674371bf66a86407b967b6624b35773c98dd9c01a8a760d76a8","last_reissued_at":"2026-07-05T05:45:42.846568Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:45:42.846568Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Non-LTE analysis for Helium and Strontium lines in the kilonova AT2017gfo","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.HE","authors_text":"Kenta Hotokezaka, Masaomi Tanaka, Nanae Domoto, Yuta Tarumi","submitted_at":"2023-02-25T11:11:18Z","abstract_excerpt":"Kilonova spectra imprint valuable information about the elements synthesized in neutron star mergers. In AT2017gfo, the kilonova associated with GW170817, the spectroscopic feature centered around 8000 angstroms has been interpreted as the P-Cygni profile arising from singly ionized Strontium. Recently, Perego et al. (2022) suggested that Helium 10833 line can be an alternative explanation of the feature. Here, we study the line features under non-local thermodynamic equilibrium. We find that the ionization of ejecta by the stopping of radioactive decay product can significantly enhance the io"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.13061","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/2302.13061/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":"2302.13061","created_at":"2026-07-05T05:45:42.846618+00:00"},{"alias_kind":"arxiv_version","alias_value":"2302.13061v1","created_at":"2026-07-05T05:45:42.846618+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.13061","created_at":"2026-07-05T05:45:42.846618+00:00"},{"alias_kind":"pith_short_12","alias_value":"4APSFVZ7C53H","created_at":"2026-07-05T05:45:42.846618+00:00"},{"alias_kind":"pith_short_16","alias_value":"4APSFVZ7C53HINY3","created_at":"2026-07-05T05:45:42.846618+00:00"},{"alias_kind":"pith_short_8","alias_value":"4APSFVZ7","created_at":"2026-07-05T05:45:42.846618+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":4,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.11299","citing_title":"A magnetar formation in binary neutron star merger","ref_index":126,"is_internal_anchor":false},{"citing_arxiv_id":"2604.22671","citing_title":"Exploring the diversity of kilonovae with 3D radiative transfer I. The polar direction","ref_index":77,"is_internal_anchor":false},{"citing_arxiv_id":"2604.05703","citing_title":"Non-LTE Ionization Modeling for Helium and Strontium in Neutron Star Merger Ejecta","ref_index":71,"is_internal_anchor":false},{"citing_arxiv_id":"2604.05812","citing_title":"Strontium and helium in the kilonova AT2017gfo: Origin of the 1{\\mu}m feature constrained via NLTE calculations","ref_index":83,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ","json":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ.json","graph_json":"https://pith.science/api/pith-number/4APSFVZ7C53HINY36ZVIMQD3SZ/graph.json","events_json":"https://pith.science/api/pith-number/4APSFVZ7C53HINY36ZVIMQD3SZ/events.json","paper":"https://pith.science/paper/4APSFVZ7"},"agent_actions":{"view_html":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ","download_json":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ.json","view_paper":"https://pith.science/paper/4APSFVZ7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2302.13061&json=true","fetch_graph":"https://pith.science/api/pith-number/4APSFVZ7C53HINY36ZVIMQD3SZ/graph.json","fetch_events":"https://pith.science/api/pith-number/4APSFVZ7C53HINY36ZVIMQD3SZ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ/action/storage_attestation","attest_author":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ/action/author_attestation","sign_citation":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ/action/citation_signature","submit_replication":"https://pith.science/pith/4APSFVZ7C53HINY36ZVIMQD3SZ/action/replication_record"}},"created_at":"2026-07-05T05:45:42.846618+00:00","updated_at":"2026-07-05T05:45:42.846618+00:00"}