{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:HJU3PIFP2HPXMOD5U5JQXALUDJ","short_pith_number":"pith:HJU3PIFP","schema_version":"1.0","canonical_sha256":"3a69b7a0afd1df76387da7530b81741a6133602d7b1d5bd105e90aa46d77e1f4","source":{"kind":"arxiv","id":"astro-ph/0307215","version":1},"attestation_state":"computed","paper":{"title":"The Bursting Behavior of 4U 1728-34: Parameters of a Neutron Star and Geometry of a NS-disk system","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Frank Haberl (MPIEP), Lev Titarchuk (GMU/CEOSR), Nickolai Shaposhnikov (GMU/CEOSR)","submitted_at":"2003-07-10T16:06:09Z","abstract_excerpt":"We analyze a set of Type I X-ray bursts from the low mass X-ray binary 4U 1728 -34, observed with Rossi X-ray Timing Explorer (RXTE). and we implement an analytical model of X-ray spectral formation in the neutron star (NS) atmosphere during a burst. We infer the dependence of the neutron star mass and radius with respect to the assumed distance to the system using an analytical model of X-ray burst spectral formation. The model behavior clearly indicates that the burster atmosphere is helium-dominated. Our results strongly favor the soft equation of state (EOS) of NS for 4U 1728-34. We find t"},"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":"astro-ph/0307215","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-07-10T16:06:09Z","cross_cats_sorted":[],"title_canon_sha256":"58eea8e20f470cce115fd1b99fe3882f5f7630888ff8b0500f87e05b23859b07","abstract_canon_sha256":"d592be306feb43f987ff4e7746aed108ccc02f9a98aa51d9b51a173d926b7f40"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:52:08.601960Z","signature_b64":"PEIxAZgqjgYmCAQTkAXhzZ7D109vu0AWaI4F2gN4KVXgg5fjHrcAe589gjbekDMYMayOpiC6x3Us4k19Zr91Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a69b7a0afd1df76387da7530b81741a6133602d7b1d5bd105e90aa46d77e1f4","last_reissued_at":"2026-07-04T16:52:08.601530Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:52:08.601530Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Bursting Behavior of 4U 1728-34: Parameters of a Neutron Star and Geometry of a NS-disk system","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Frank Haberl (MPIEP), Lev Titarchuk (GMU/CEOSR), Nickolai Shaposhnikov (GMU/CEOSR)","submitted_at":"2003-07-10T16:06:09Z","abstract_excerpt":"We analyze a set of Type I X-ray bursts from the low mass X-ray binary 4U 1728 -34, observed with Rossi X-ray Timing Explorer (RXTE). and we implement an analytical model of X-ray spectral formation in the neutron star (NS) atmosphere during a burst. We infer the dependence of the neutron star mass and radius with respect to the assumed distance to the system using an analytical model of X-ray burst spectral formation. The model behavior clearly indicates that the burster atmosphere is helium-dominated. Our results strongly favor the soft equation of state (EOS) of NS for 4U 1728-34. We find t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0307215","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/astro-ph/0307215/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":"astro-ph/0307215","created_at":"2026-07-04T16:52:08.601595+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0307215v1","created_at":"2026-07-04T16:52:08.601595+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0307215","created_at":"2026-07-04T16:52:08.601595+00:00"},{"alias_kind":"pith_short_12","alias_value":"HJU3PIFP2HPX","created_at":"2026-07-04T16:52:08.601595+00:00"},{"alias_kind":"pith_short_16","alias_value":"HJU3PIFP2HPXMOD5","created_at":"2026-07-04T16:52:08.601595+00:00"},{"alias_kind":"pith_short_8","alias_value":"HJU3PIFP","created_at":"2026-07-04T16:52:08.601595+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/HJU3PIFP2HPXMOD5U5JQXALUDJ","json":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ.json","graph_json":"https://pith.science/api/pith-number/HJU3PIFP2HPXMOD5U5JQXALUDJ/graph.json","events_json":"https://pith.science/api/pith-number/HJU3PIFP2HPXMOD5U5JQXALUDJ/events.json","paper":"https://pith.science/paper/HJU3PIFP"},"agent_actions":{"view_html":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ","download_json":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ.json","view_paper":"https://pith.science/paper/HJU3PIFP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/0307215&json=true","fetch_graph":"https://pith.science/api/pith-number/HJU3PIFP2HPXMOD5U5JQXALUDJ/graph.json","fetch_events":"https://pith.science/api/pith-number/HJU3PIFP2HPXMOD5U5JQXALUDJ/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ/action/storage_attestation","attest_author":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ/action/author_attestation","sign_citation":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ/action/citation_signature","submit_replication":"https://pith.science/pith/HJU3PIFP2HPXMOD5U5JQXALUDJ/action/replication_record"}},"created_at":"2026-07-04T16:52:08.601595+00:00","updated_at":"2026-07-04T16:52:08.601595+00:00"}