{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:4IA22WENZPLXB7CAUIY5GYCX44","short_pith_number":"pith:4IA22WEN","schema_version":"1.0","canonical_sha256":"e201ad588dcbd770fc40a231d36057e72c199542f9448719435028f847f87cb4","source":{"kind":"arxiv","id":"2501.05511","version":2},"attestation_state":"computed","paper":{"title":"X-ray Dips and Polarization Angle Swings in GX 13+1","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alessandro Di Marco, Alessandro Papitto, Anna Bobrikova, Daniele Rogantini, Fabio La Monaca, Juri Poutanen, Luigi Stella, Maria Cristina Baglio, Matteo Bachetti, Maura Pilia, Vladislav Loktev","submitted_at":"2025-01-09T19:00:01Z","abstract_excerpt":"We present the result from the April 2024 observation of the low-mass X-ray binary GX 13+1 with the Imaging X-ray Polarimetry Explorer (IXPE), together with NICER and Swift-XRT coordinated observations. Two light curve dips were observed; during them, the harder Comptonized spectral component was dominant and the polarization degree higher than in the softer, off-dip intervals. Through a joint analysis of the three IXPE observations, which also included the dip from the first observation, we demonstrate that the polarization properties varied in response to the intensity and spectral hardness "},"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":"2501.05511","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-09T19:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"96290424499bfa08c5003afb69c72346f7c268cb8ed668f1475a8b48210b2c5f","abstract_canon_sha256":"9e90c72b26ecbfe51363d87022b2afb0492463f2214479717a072a9790a17c27"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:12:25.035535Z","signature_b64":"PKHXurb3tE20mhPWYo46Hg7i/6kPQ9xmTUx2c5ZdEnuLIorKC3aEq0MLU4l8wFt+wieBcSdT3ZQUOgruttRcBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e201ad588dcbd770fc40a231d36057e72c199542f9448719435028f847f87cb4","last_reissued_at":"2026-07-05T10:12:25.035008Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:12:25.035008Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"X-ray Dips and Polarization Angle Swings in GX 13+1","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Alessandro Di Marco, Alessandro Papitto, Anna Bobrikova, Daniele Rogantini, Fabio La Monaca, Juri Poutanen, Luigi Stella, Maria Cristina Baglio, Matteo Bachetti, Maura Pilia, Vladislav Loktev","submitted_at":"2025-01-09T19:00:01Z","abstract_excerpt":"We present the result from the April 2024 observation of the low-mass X-ray binary GX 13+1 with the Imaging X-ray Polarimetry Explorer (IXPE), together with NICER and Swift-XRT coordinated observations. Two light curve dips were observed; during them, the harder Comptonized spectral component was dominant and the polarization degree higher than in the softer, off-dip intervals. Through a joint analysis of the three IXPE observations, which also included the dip from the first observation, we demonstrate that the polarization properties varied in response to the intensity and spectral hardness "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.05511","kind":"arxiv","version":2},"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/2501.05511/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":"2501.05511","created_at":"2026-07-05T10:12:25.035075+00:00"},{"alias_kind":"arxiv_version","alias_value":"2501.05511v2","created_at":"2026-07-05T10:12:25.035075+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.05511","created_at":"2026-07-05T10:12:25.035075+00:00"},{"alias_kind":"pith_short_12","alias_value":"4IA22WENZPLX","created_at":"2026-07-05T10:12:25.035075+00:00"},{"alias_kind":"pith_short_16","alias_value":"4IA22WENZPLXB7CA","created_at":"2026-07-05T10:12:25.035075+00:00"},{"alias_kind":"pith_short_8","alias_value":"4IA22WEN","created_at":"2026-07-05T10:12:25.035075+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2604.03366","citing_title":"The hitchhiker's guide to the IXPE data analysis","ref_index":13,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44","json":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44.json","graph_json":"https://pith.science/api/pith-number/4IA22WENZPLXB7CAUIY5GYCX44/graph.json","events_json":"https://pith.science/api/pith-number/4IA22WENZPLXB7CAUIY5GYCX44/events.json","paper":"https://pith.science/paper/4IA22WEN"},"agent_actions":{"view_html":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44","download_json":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44.json","view_paper":"https://pith.science/paper/4IA22WEN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2501.05511&json=true","fetch_graph":"https://pith.science/api/pith-number/4IA22WENZPLXB7CAUIY5GYCX44/graph.json","fetch_events":"https://pith.science/api/pith-number/4IA22WENZPLXB7CAUIY5GYCX44/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44/action/storage_attestation","attest_author":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44/action/author_attestation","sign_citation":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44/action/citation_signature","submit_replication":"https://pith.science/pith/4IA22WENZPLXB7CAUIY5GYCX44/action/replication_record"}},"created_at":"2026-07-05T10:12:25.035075+00:00","updated_at":"2026-07-05T10:12:25.035075+00:00"}