{"paper":{"title":"Revisiting the 2021 Outburst of the BHC MAXI J1803-298 Using NICER, NuSTAR, and Insight-HXMT Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"LFQPOs in MAXI J1803-298 arise from the dynamically evolving inner accretion flow.","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Kaushik Chatterjee, Sujoy K. Nath","submitted_at":"2026-05-13T09:20:37Z","abstract_excerpt":"We present a broadband spectral and timing study of the black hole candidate MAXI J1803-298 during its 2021 outburst using simultaneous observations from NICER, NuSTAR, and Insight-HXMT. The combined multi-instrument coverage allows us to investigate the evolution of low-frequency quasi-periodic oscillations (LFQPOs) together with the spectral properties of the source over a wide energy range. During the early observation epoch, the source exhibits a hard or hard-intermediate spectral state dominated by Comptonized emission with reflection features. Spectral modeling within the framework of th"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"The combined spectral and timing results support a scenario in which LFQPOs in MAXI J1803-298 arise from the dynamically evolving inner accretion flow.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"That the two-component advective flow (TCAF) model accurately captures the accretion geometry and yields an unbiased independent black hole mass estimate from the fitted shock location and flow parameters.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Multi-instrument observations of MAXI J1803-298 link LFQPOs to the evolving inner Comptonizing accretion flow in the hard state, with TCAF modeling yielding a black hole mass estimate.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"LFQPOs in MAXI J1803-298 arise from the dynamically evolving inner accretion flow.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"f1c158180899b745321ea4ca8827b391c189672c0c9ce43f7a8237b1729c6464"},"source":{"id":"2605.13232","kind":"arxiv","version":1},"verdict":{"id":"f101e5ef-c532-4374-8794-98db5c24ea98","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:46:21.664093Z","strongest_claim":"The combined spectral and timing results support a scenario in which LFQPOs in MAXI J1803-298 arise from the dynamically evolving inner accretion flow.","one_line_summary":"Multi-instrument observations of MAXI J1803-298 link LFQPOs to the evolving inner Comptonizing accretion flow in the hard state, with TCAF modeling yielding a black hole mass estimate.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"That the two-component advective flow (TCAF) model accurately captures the accretion geometry and yields an unbiased independent black hole mass estimate from the fitted shock location and flow parameters.","pith_extraction_headline":"LFQPOs in MAXI J1803-298 arise from the dynamically evolving inner accretion flow."},"references":{"count":3,"sample":[{"doi":"","year":2015,"title":"A., Cook, R., et al","work_id":"679dc9a7-1f83-4441-bfe6-3c95650afecc","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"10.1088/0004-637x/800/2/109","year":2022,"title":"A., Cook, R., et al","work_id":"ac5aa908-305c-442d-b5b3-b30580ce64ae","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2018,"title":"1989, in Timing Neutron Stars: proceedings of the NA TO Advanced Study Institute on Timing Neutron Stars held April 4-15, 27 Xu, Y ., & Harrison, F","work_id":"63efc0ca-06fc-4837-aca5-38a3faa6d76b","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":3,"snapshot_sha256":"e8d8b66f8285ff10c5a0e1d8421ad34aa0bb1e5b146b052115cdf254fcfce9a0","internal_anchors":0},"formal_canon":{"evidence_count":2,"snapshot_sha256":"c33aa56ae4e25c4a1a2dbc9a4ebc743cbe373395ff295bbac069e04c84f7463f"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}