{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:VKG2EINX2XY2CJ63OT6XD7ZSIO","short_pith_number":"pith:VKG2EINX","schema_version":"1.0","canonical_sha256":"aa8da221b7d5f1a127db74fd71ff32438467aa832fd7257ce609a8b1cca88566","source":{"kind":"arxiv","id":"2409.13290","version":1},"attestation_state":"computed","paper":{"title":"Exploring Nonlinear Electrodynamics Theories: Shadows of Regular Black Holes and Horizonless Ultra-Compact Objects","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Rahul Kumar Walia","submitted_at":"2024-09-20T07:39:17Z","abstract_excerpt":"In the Einstein-Maxwell theory with nonlinear electrodynamics (NED) fields, the singularity problem in general relativity is potentially resolved, leading to regular black hole solutions. In NED theories, photons follow null geodesics of an effective geometry that differs from the spacetime geometry itself. This raises an important question: Do NED fields produce unique observational signatures in the electromagnetic spectrum that can test regular black holes and NED theories? We analyze the shadows of two NED-charged regular black holes and their horizonless ultracompact objects (HUCOs) under"},"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":"2409.13290","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"gr-qc","submitted_at":"2024-09-20T07:39:17Z","cross_cats_sorted":[],"title_canon_sha256":"28948f4fe9367c82da21b9b769fcb129d2c7150816de0aca03ec32579566b443","abstract_canon_sha256":"219f13f555bf058915025c0a7017b892563f405c8e226dc586e6f76e9ef93226"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:09:32.531642Z","signature_b64":"bY5bS1Fslig2Dzf3aMWM0esINQ+c3DLESKiLdEhb08pqFqIAmg7o9Qa/VsVyTXAgQUk0XtxrxTB7SrMeWP1QCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa8da221b7d5f1a127db74fd71ff32438467aa832fd7257ce609a8b1cca88566","last_reissued_at":"2026-07-05T09:09:32.531074Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:09:32.531074Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Exploring Nonlinear Electrodynamics Theories: Shadows of Regular Black Holes and Horizonless Ultra-Compact Objects","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Rahul Kumar Walia","submitted_at":"2024-09-20T07:39:17Z","abstract_excerpt":"In the Einstein-Maxwell theory with nonlinear electrodynamics (NED) fields, the singularity problem in general relativity is potentially resolved, leading to regular black hole solutions. In NED theories, photons follow null geodesics of an effective geometry that differs from the spacetime geometry itself. This raises an important question: Do NED fields produce unique observational signatures in the electromagnetic spectrum that can test regular black holes and NED theories? We analyze the shadows of two NED-charged regular black holes and their horizonless ultracompact objects (HUCOs) under"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2409.13290","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/2409.13290/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":"2409.13290","created_at":"2026-07-05T09:09:32.531143+00:00"},{"alias_kind":"arxiv_version","alias_value":"2409.13290v1","created_at":"2026-07-05T09:09:32.531143+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2409.13290","created_at":"2026-07-05T09:09:32.531143+00:00"},{"alias_kind":"pith_short_12","alias_value":"VKG2EINX2XY2","created_at":"2026-07-05T09:09:32.531143+00:00"},{"alias_kind":"pith_short_16","alias_value":"VKG2EINX2XY2CJ63","created_at":"2026-07-05T09:09:32.531143+00:00"},{"alias_kind":"pith_short_8","alias_value":"VKG2EINX","created_at":"2026-07-05T09:09:32.531143+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":3,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2606.20284","citing_title":"Constitutive birefringence and critical curves in the rotating Garc\\'ia--D\\'iaz black hole","ref_index":32,"is_internal_anchor":false},{"citing_arxiv_id":"2604.22309","citing_title":"Photon Propagation and Black Hole Imaging in Kruglov Nonlinear Electrodynamics","ref_index":49,"is_internal_anchor":false},{"citing_arxiv_id":"2604.22309","citing_title":"Photon Propagation and Black Hole Imaging in Kruglov Nonlinear Electrodynamics","ref_index":49,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO","json":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO.json","graph_json":"https://pith.science/api/pith-number/VKG2EINX2XY2CJ63OT6XD7ZSIO/graph.json","events_json":"https://pith.science/api/pith-number/VKG2EINX2XY2CJ63OT6XD7ZSIO/events.json","paper":"https://pith.science/paper/VKG2EINX"},"agent_actions":{"view_html":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO","download_json":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO.json","view_paper":"https://pith.science/paper/VKG2EINX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2409.13290&json=true","fetch_graph":"https://pith.science/api/pith-number/VKG2EINX2XY2CJ63OT6XD7ZSIO/graph.json","fetch_events":"https://pith.science/api/pith-number/VKG2EINX2XY2CJ63OT6XD7ZSIO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO/action/storage_attestation","attest_author":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO/action/author_attestation","sign_citation":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO/action/citation_signature","submit_replication":"https://pith.science/pith/VKG2EINX2XY2CJ63OT6XD7ZSIO/action/replication_record"}},"created_at":"2026-07-05T09:09:32.531143+00:00","updated_at":"2026-07-05T09:09:32.531143+00:00"}