{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:3Y6MVVTW4YQVVJ73QJSRMB7IW5","short_pith_number":"pith:3Y6MVVTW","canonical_record":{"source":{"id":"2501.08073","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-14T12:41:55Z","cross_cats_sorted":[],"title_canon_sha256":"6ea6c31659c00a845e3be22e032700b2f4bbd144150c26d007731b68154f385d","abstract_canon_sha256":"5002571e7dd5ed883343c83d70535482829496db88d1a67122b008883f73177c"},"schema_version":"1.0"},"canonical_sha256":"de3ccad676e6215aa7fb82651607e8b767fc13889760918b46518371d849b5fa","source":{"kind":"arxiv","id":"2501.08073","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.08073","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"arxiv_version","alias_value":"2501.08073v1","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.08073","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_12","alias_value":"3Y6MVVTW4YQV","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_16","alias_value":"3Y6MVVTW4YQVVJ73","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_8","alias_value":"3Y6MVVTW","created_at":"2026-07-05T10:00:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:3Y6MVVTW4YQVVJ73QJSRMB7IW5","target":"record","payload":{"canonical_record":{"source":{"id":"2501.08073","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-14T12:41:55Z","cross_cats_sorted":[],"title_canon_sha256":"6ea6c31659c00a845e3be22e032700b2f4bbd144150c26d007731b68154f385d","abstract_canon_sha256":"5002571e7dd5ed883343c83d70535482829496db88d1a67122b008883f73177c"},"schema_version":"1.0"},"canonical_sha256":"de3ccad676e6215aa7fb82651607e8b767fc13889760918b46518371d849b5fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:00:55.373381Z","signature_b64":"WpDGLK2A9pZJJi15iSAASW17VXzEGw6lB4F1LQ5Q0hCU+mqoSyOnpcxMbXc57uknODNjXEny3IkFIVH5GKEBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"de3ccad676e6215aa7fb82651607e8b767fc13889760918b46518371d849b5fa","last_reissued_at":"2026-07-05T10:00:55.372912Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:00:55.372912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2501.08073","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:00:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JAwevAUK+qa71sYnsbDmY67qE8vd5Th80pRP4uVN3XtpTLVcJdscActdq4PAu4a/1GSWLSftYd2yi8BFBmFqDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T09:58:00.982007Z"},"content_sha256":"351b73f1e274be22e9d980e4d5ebd5340e7269ea12cf73b3f00dba1065cb42af","schema_version":"1.0","event_id":"sha256:351b73f1e274be22e9d980e4d5ebd5340e7269ea12cf73b3f00dba1065cb42af"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:3Y6MVVTW4YQVVJ73QJSRMB7IW5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing Spectral Evolution and Intrinsic Variability of Mkn\\,421: A Multi-Epoch AstroSat Study of X-ray Spectra","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Javaid Tantry, Naseer Iqbal, Ranjeev Misra, Sikandar Akbar, Zahir Shah","submitted_at":"2025-01-14T12:41:55Z","abstract_excerpt":"Our study presents a time-resolved X-ray spectral analysis of Mkn 421, using AstroSat observations taken during different epochs between 2016 and 2019. The variability of the source in X-rays is utilized to investigate the evolution of its spectral properties. Each observation period was divided into segments of about 10 ks, and we employed three forms of particle distributions: broken-power law (BPL), log-parabola (LP), and power-law with maximum electron energy (xi-max model) undergoing synchrotron losses to fit the broad X-ray spectrum in each segment. We observed that all of these models p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.08073","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/2501.08073/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:00:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RJdteqzJrfPbPWpDnekRy2t1DAfUA16PKPsCO5w3VWDd+F3xTBGKr/U4urEcIvHt2t0dAonT1YHOsGKy/ad2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T09:58:00.982964Z"},"content_sha256":"1e812c0ef037d15ebb6cacac68b574b2f70dbd10b8760cc9d0615ba299f77d8d","schema_version":"1.0","event_id":"sha256:1e812c0ef037d15ebb6cacac68b574b2f70dbd10b8760cc9d0615ba299f77d8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/bundle.json","state_url":"https://pith.science/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-14T09:58:00Z","links":{"resolver":"https://pith.science/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5","bundle":"https://pith.science/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/bundle.json","state":"https://pith.science/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3Y6MVVTW4YQVVJ73QJSRMB7IW5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:3Y6MVVTW4YQVVJ73QJSRMB7IW5","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5002571e7dd5ed883343c83d70535482829496db88d1a67122b008883f73177c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-14T12:41:55Z","title_canon_sha256":"6ea6c31659c00a845e3be22e032700b2f4bbd144150c26d007731b68154f385d"},"schema_version":"1.0","source":{"id":"2501.08073","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2501.08073","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"arxiv_version","alias_value":"2501.08073v1","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2501.08073","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_12","alias_value":"3Y6MVVTW4YQV","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_16","alias_value":"3Y6MVVTW4YQVVJ73","created_at":"2026-07-05T10:00:55Z"},{"alias_kind":"pith_short_8","alias_value":"3Y6MVVTW","created_at":"2026-07-05T10:00:55Z"}],"graph_snapshots":[{"event_id":"sha256:1e812c0ef037d15ebb6cacac68b574b2f70dbd10b8760cc9d0615ba299f77d8d","target":"graph","created_at":"2026-07-05T10:00:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2501.08073/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Our study presents a time-resolved X-ray spectral analysis of Mkn 421, using AstroSat observations taken during different epochs between 2016 and 2019. The variability of the source in X-rays is utilized to investigate the evolution of its spectral properties. Each observation period was divided into segments of about 10 ks, and we employed three forms of particle distributions: broken-power law (BPL), log-parabola (LP), and power-law with maximum electron energy (xi-max model) undergoing synchrotron losses to fit the broad X-ray spectrum in each segment. We observed that all of these models p","authors_text":"Javaid Tantry, Naseer Iqbal, Ranjeev Misra, Sikandar Akbar, Zahir Shah","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-14T12:41:55Z","title":"Probing Spectral Evolution and Intrinsic Variability of Mkn\\,421: A Multi-Epoch AstroSat Study of X-ray Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2501.08073","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:351b73f1e274be22e9d980e4d5ebd5340e7269ea12cf73b3f00dba1065cb42af","target":"record","created_at":"2026-07-05T10:00:55Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5002571e7dd5ed883343c83d70535482829496db88d1a67122b008883f73177c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2025-01-14T12:41:55Z","title_canon_sha256":"6ea6c31659c00a845e3be22e032700b2f4bbd144150c26d007731b68154f385d"},"schema_version":"1.0","source":{"id":"2501.08073","kind":"arxiv","version":1}},"canonical_sha256":"de3ccad676e6215aa7fb82651607e8b767fc13889760918b46518371d849b5fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"de3ccad676e6215aa7fb82651607e8b767fc13889760918b46518371d849b5fa","first_computed_at":"2026-07-05T10:00:55.372912Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:00:55.372912Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WpDGLK2A9pZJJi15iSAASW17VXzEGw6lB4F1LQ5Q0hCU+mqoSyOnpcxMbXc57uknODNjXEny3IkFIVH5GKEBCg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:00:55.373381Z","signed_message":"canonical_sha256_bytes"},"source_id":"2501.08073","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:351b73f1e274be22e9d980e4d5ebd5340e7269ea12cf73b3f00dba1065cb42af","sha256:1e812c0ef037d15ebb6cacac68b574b2f70dbd10b8760cc9d0615ba299f77d8d"],"state_sha256":"de21e050ccb1808660a12645f568c5ba1e751c474ee4f3021e5a41621c92f95f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cfz1P+trVWZB24ximIY+CwIUm66igztRz62h7I23arRjH0JB1GTDsniD3GZkbl/w9HtSX8UXEtbeSy9O9vzKCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T09:58:01.064040Z","bundle_sha256":"597572a613ce27ec4a8c959b4123b10c51185fd68ddf2334badd35a4b21f8c7b"}}