{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:KYFK64F4V64G2VMIBBENR7PMSB","short_pith_number":"pith:KYFK64F4","schema_version":"1.0","canonical_sha256":"560aaf70bcafb86d55880848d8fdec90460039b244198c338fce2eca49fc6109","source":{"kind":"arxiv","id":"2508.08889","version":2},"attestation_state":"computed","paper":{"title":"Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole Spacetime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"A. A. Ara\\'ujo Filho, Iarley P. Lobo, N. Heidari, Yuxuan Shi","submitted_at":"2025-08-12T12:25:47Z","abstract_excerpt":"This work investigates additional gravitational features of a newly proposed black hole spacetime within Kalb-Ramond gravity, incorporating non-commutative corrections arising from a gauge-theoretic approach recently introduced in the literature [arXiv:2507.17390]. Accordingly, null geodesics are solved numerically to trace photon paths; the photon sphere and shadow are determined. From Event Horizon Telescope (EHT) measurements of $Sgr A^{*}$, constraints on the parameters $\\Theta$ (which encapsulates the non-commutativity) and $\\ell$ (the Lorentz-violating parameter) are established. To exam"},"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":"2508.08889","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2025-08-12T12:25:47Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"8abd06e2d72a10e2dc6106074e80fefe838ea6aa1f2a415596d18594bf7722b1","abstract_canon_sha256":"856aa91f90afeaf43eca7fed644b823f0bb510ed2a945823e566dfdb3c9eaa50"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-29T02:05:35.769611Z","signature_b64":"/5+qfpRcvX4ITCt8kZ9iMBDeV89Vr9l1G+vOT63mPgjDhpPcTGvLmzZQXRzy9V+b03rXCQ8yF/rVW3P5ufCyDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"560aaf70bcafb86d55880848d8fdec90460039b244198c338fce2eca49fc6109","last_reissued_at":"2026-05-29T02:05:35.769058Z","signature_status":"signed_v1","first_computed_at":"2026-05-29T02:05:35.769058Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole Spacetime","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"gr-qc","authors_text":"A. A. Ara\\'ujo Filho, Iarley P. Lobo, N. Heidari, Yuxuan Shi","submitted_at":"2025-08-12T12:25:47Z","abstract_excerpt":"This work investigates additional gravitational features of a newly proposed black hole spacetime within Kalb-Ramond gravity, incorporating non-commutative corrections arising from a gauge-theoretic approach recently introduced in the literature [arXiv:2507.17390]. Accordingly, null geodesics are solved numerically to trace photon paths; the photon sphere and shadow are determined. From Event Horizon Telescope (EHT) measurements of $Sgr A^{*}$, constraints on the parameters $\\Theta$ (which encapsulates the non-commutativity) and $\\ell$ (the Lorentz-violating parameter) are established. To exam"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2508.08889","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/2508.08889/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":"2508.08889","created_at":"2026-05-29T02:05:35.769115+00:00"},{"alias_kind":"arxiv_version","alias_value":"2508.08889v2","created_at":"2026-05-29T02:05:35.769115+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2508.08889","created_at":"2026-05-29T02:05:35.769115+00:00"},{"alias_kind":"pith_short_12","alias_value":"KYFK64F4V64G","created_at":"2026-05-29T02:05:35.769115+00:00"},{"alias_kind":"pith_short_16","alias_value":"KYFK64F4V64G2VMI","created_at":"2026-05-29T02:05:35.769115+00:00"},{"alias_kind":"pith_short_8","alias_value":"KYFK64F4","created_at":"2026-05-29T02:05:35.769115+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2509.17867","citing_title":"The Flight of the Bumblebee in a Non-Commutative Geometry: A New Black Hole Solution","ref_index":32,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB","json":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB.json","graph_json":"https://pith.science/api/pith-number/KYFK64F4V64G2VMIBBENR7PMSB/graph.json","events_json":"https://pith.science/api/pith-number/KYFK64F4V64G2VMIBBENR7PMSB/events.json","paper":"https://pith.science/paper/KYFK64F4"},"agent_actions":{"view_html":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB","download_json":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB.json","view_paper":"https://pith.science/paper/KYFK64F4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2508.08889&json=true","fetch_graph":"https://pith.science/api/pith-number/KYFK64F4V64G2VMIBBENR7PMSB/graph.json","fetch_events":"https://pith.science/api/pith-number/KYFK64F4V64G2VMIBBENR7PMSB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB/action/storage_attestation","attest_author":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB/action/author_attestation","sign_citation":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB/action/citation_signature","submit_replication":"https://pith.science/pith/KYFK64F4V64G2VMIBBENR7PMSB/action/replication_record"}},"created_at":"2026-05-29T02:05:35.769115+00:00","updated_at":"2026-05-29T02:05:35.769115+00:00"}