{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:IAAL2W57J54LOJMR37F4VBQKY2","short_pith_number":"pith:IAAL2W57","schema_version":"1.0","canonical_sha256":"4000bd5bbf4f78b72591dfcbca860ac684371d63168f0cb9b224a43d075aebb1","source":{"kind":"arxiv","id":"2512.08531","version":2},"attestation_state":"computed","paper":{"title":"NICER Perspective on TeV Blazar Mrk~421: X-ray Variability and Particle Acceleration","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Gopal Bhatta, Navaneeth P K, Sangeetha Kizhakkekalam, Tek P. Adhikari","submitted_at":"2025-12-09T12:23:04Z","abstract_excerpt":"Mrk~421 is one of the most fascinating blazars, widely studied across the electromagnetic spectrum using observations at various wavebands, from radio to the TeV gamma ray bands. We present the first detailed spectral and timing analysis of the TeV blazar Mrk~421 based on 45 X-ray observations from the \\textit{NICER} X-ray telescope, collected over two years from 2022 to 2024. The source exhibits strong X-ray variability across intraday and long-term timescales. During this period, we observe a dramatic change in flux, from $\\sim 50$ to $\\sim 1380$~cts~s$^{-1}$, representing a $\\sim 28$-fold i"},"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":"2512.08531","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-12-09T12:23:04Z","cross_cats_sorted":[],"title_canon_sha256":"575f2473ed6c74560bbd7d7aa8cd904382f20ac1271c0fb4d5122a0c09ebde1c","abstract_canon_sha256":"b071d909cac44af8f7aac52977a9ff53caf13a4149ebc15871235443de9f60c8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-04T01:09:40.228133Z","signature_b64":"CylDOSkeIueRCnsG/UUnVIvDSRJ8al9QUiXjyLJAph0eWyBmHG8fv9O+Z/UMkIj66Mg5rtVG4dvcl5eXqUKxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4000bd5bbf4f78b72591dfcbca860ac684371d63168f0cb9b224a43d075aebb1","last_reissued_at":"2026-06-04T01:09:40.227638Z","signature_status":"signed_v1","first_computed_at":"2026-06-04T01:09:40.227638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"NICER Perspective on TeV Blazar Mrk~421: X-ray Variability and Particle Acceleration","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Gopal Bhatta, Navaneeth P K, Sangeetha Kizhakkekalam, Tek P. Adhikari","submitted_at":"2025-12-09T12:23:04Z","abstract_excerpt":"Mrk~421 is one of the most fascinating blazars, widely studied across the electromagnetic spectrum using observations at various wavebands, from radio to the TeV gamma ray bands. We present the first detailed spectral and timing analysis of the TeV blazar Mrk~421 based on 45 X-ray observations from the \\textit{NICER} X-ray telescope, collected over two years from 2022 to 2024. The source exhibits strong X-ray variability across intraday and long-term timescales. During this period, we observe a dramatic change in flux, from $\\sim 50$ to $\\sim 1380$~cts~s$^{-1}$, representing a $\\sim 28$-fold i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2512.08531","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/2512.08531/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":"2512.08531","created_at":"2026-06-04T01:09:40.227703+00:00"},{"alias_kind":"arxiv_version","alias_value":"2512.08531v2","created_at":"2026-06-04T01:09:40.227703+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2512.08531","created_at":"2026-06-04T01:09:40.227703+00:00"},{"alias_kind":"pith_short_12","alias_value":"IAAL2W57J54L","created_at":"2026-06-04T01:09:40.227703+00:00"},{"alias_kind":"pith_short_16","alias_value":"IAAL2W57J54LOJMR","created_at":"2026-06-04T01:09:40.227703+00:00"},{"alias_kind":"pith_short_8","alias_value":"IAAL2W57","created_at":"2026-06-04T01:09:40.227703+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.15867","citing_title":"Spectral-Regime Overlap and Transition-like Behavior in the Blazar Population from Multi-Instrument X-ray and TeV Observations","ref_index":60,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2","json":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2.json","graph_json":"https://pith.science/api/pith-number/IAAL2W57J54LOJMR37F4VBQKY2/graph.json","events_json":"https://pith.science/api/pith-number/IAAL2W57J54LOJMR37F4VBQKY2/events.json","paper":"https://pith.science/paper/IAAL2W57"},"agent_actions":{"view_html":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2","download_json":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2.json","view_paper":"https://pith.science/paper/IAAL2W57","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2512.08531&json=true","fetch_graph":"https://pith.science/api/pith-number/IAAL2W57J54LOJMR37F4VBQKY2/graph.json","fetch_events":"https://pith.science/api/pith-number/IAAL2W57J54LOJMR37F4VBQKY2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2/action/storage_attestation","attest_author":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2/action/author_attestation","sign_citation":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2/action/citation_signature","submit_replication":"https://pith.science/pith/IAAL2W57J54LOJMR37F4VBQKY2/action/replication_record"}},"created_at":"2026-06-04T01:09:40.227703+00:00","updated_at":"2026-06-04T01:09:40.227703+00:00"}