{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:E7T3HCEP476PZINXYENULMORY5","short_pith_number":"pith:E7T3HCEP","canonical_record":{"source":{"id":"astro-ph/9801049","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-07T15:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"37157aecc1d086669ba14fce8645362c8658e4cdf5eb50a17fb2f2a58b947d58","abstract_canon_sha256":"8710a55df35727c9da6d9b42c5996162b99997d2956bebfc6230b54335d61511"},"schema_version":"1.0"},"canonical_sha256":"27e7b3888fe7fcfca1b7c11b45b1d1c7591c985bc332c87eb37bfca8afd4af14","source":{"kind":"arxiv","id":"astro-ph/9801049","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9801049","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9801049v1","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9801049","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"pith_short_12","alias_value":"E7T3HCEP476P","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"E7T3HCEP476PZINX","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"E7T3HCEP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:E7T3HCEP476PZINXYENULMORY5","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9801049","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-07T15:00:14Z","cross_cats_sorted":[],"title_canon_sha256":"37157aecc1d086669ba14fce8645362c8658e4cdf5eb50a17fb2f2a58b947d58","abstract_canon_sha256":"8710a55df35727c9da6d9b42c5996162b99997d2956bebfc6230b54335d61511"},"schema_version":"1.0"},"canonical_sha256":"27e7b3888fe7fcfca1b7c11b45b1d1c7591c985bc332c87eb37bfca8afd4af14","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:14.510480Z","signature_b64":"cLcna7MCyLeoabHW2c+L71/iZPHGN96Er0JGwQAq7ujVtCljjof54UPlPvx9QoFrt4lM0XbpgmFD2Rhrn3BcAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"27e7b3888fe7fcfca1b7c11b45b1d1c7591c985bc332c87eb37bfca8afd4af14","last_reissued_at":"2026-05-18T01:40:14.509804Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:14.509804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9801049","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":"2026-05-18T01:40:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pFkFY2/xj57JngrsY/G8ozxo3uqwwbXJIv1yyQ1i0HDi0RFcAwM3JVL2Rfbq/ZjU7GZbNrhCVCxi39q57Sv4AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:12:46.480432Z"},"content_sha256":"d601c47b04f251f4794ade781a85007a9d2de0f1de75c689fc98d0c2716c1236","schema_version":"1.0","event_id":"sha256:d601c47b04f251f4794ade781a85007a9d2de0f1de75c689fc98d0c2716c1236"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:E7T3HCEP476PZINXYENULMORY5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rapid Variability of Gamma-Ray Blazars: A Model for MKN 421","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"F.Pacini, M.Salvati, M.Spada","submitted_at":"1998-01-07T15:00:14Z","abstract_excerpt":"The extremely rapid burst of TeV photons from Mkn 421 (15 May 1996) can be reconciled with the standard properties of a relativistic gamma-ray emitting jet (bulk Lorentz factor $\\approx$ 10; size $\\10^{17}$ cm) if one assumes that the electrons are accelerated in conical shocks with both opening and viewing angles $\\approx 1/\\Gamma$. If the injection time and the cooling time are much less than the photon crossing time, an emission ring moves along the jet and leads to the appearance of a very rapid flare, in satisfactory agreement with the observations."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9801049","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":""},"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":"2026-05-18T01:40:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oCE89LWuajFULFu6NQzl7z3QihG6BjtjyG1fwt2Tm5toKUEwmXT2rsxcXw7MrPFnOxbirZepVVtU/2a91IKrCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T21:12:46.480768Z"},"content_sha256":"c055d302d01635f70b5badf519d5b151a6424dc964335a01850e64b2dcdb5521","schema_version":"1.0","event_id":"sha256:c055d302d01635f70b5badf519d5b151a6424dc964335a01850e64b2dcdb5521"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E7T3HCEP476PZINXYENULMORY5/bundle.json","state_url":"https://pith.science/pith/E7T3HCEP476PZINXYENULMORY5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E7T3HCEP476PZINXYENULMORY5/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":"2026-06-04T21:12:46Z","links":{"resolver":"https://pith.science/pith/E7T3HCEP476PZINXYENULMORY5","bundle":"https://pith.science/pith/E7T3HCEP476PZINXYENULMORY5/bundle.json","state":"https://pith.science/pith/E7T3HCEP476PZINXYENULMORY5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E7T3HCEP476PZINXYENULMORY5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:E7T3HCEP476PZINXYENULMORY5","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":"8710a55df35727c9da6d9b42c5996162b99997d2956bebfc6230b54335d61511","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-07T15:00:14Z","title_canon_sha256":"37157aecc1d086669ba14fce8645362c8658e4cdf5eb50a17fb2f2a58b947d58"},"schema_version":"1.0","source":{"id":"astro-ph/9801049","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9801049","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9801049v1","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9801049","created_at":"2026-05-18T01:40:14Z"},{"alias_kind":"pith_short_12","alias_value":"E7T3HCEP476P","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"E7T3HCEP476PZINX","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"E7T3HCEP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:c055d302d01635f70b5badf519d5b151a6424dc964335a01850e64b2dcdb5521","target":"graph","created_at":"2026-05-18T01:40:14Z","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"},"paper":{"abstract_excerpt":"The extremely rapid burst of TeV photons from Mkn 421 (15 May 1996) can be reconciled with the standard properties of a relativistic gamma-ray emitting jet (bulk Lorentz factor $\\approx$ 10; size $\\10^{17}$ cm) if one assumes that the electrons are accelerated in conical shocks with both opening and viewing angles $\\approx 1/\\Gamma$. If the injection time and the cooling time are much less than the photon crossing time, an emission ring moves along the jet and leads to the appearance of a very rapid flare, in satisfactory agreement with the observations.","authors_text":"F.Pacini, M.Salvati, M.Spada","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1998-01-07T15:00:14Z","title":"Rapid Variability of Gamma-Ray Blazars: A Model for MKN 421"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9801049","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:d601c47b04f251f4794ade781a85007a9d2de0f1de75c689fc98d0c2716c1236","target":"record","created_at":"2026-05-18T01:40:14Z","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":"8710a55df35727c9da6d9b42c5996162b99997d2956bebfc6230b54335d61511","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1998-01-07T15:00:14Z","title_canon_sha256":"37157aecc1d086669ba14fce8645362c8658e4cdf5eb50a17fb2f2a58b947d58"},"schema_version":"1.0","source":{"id":"astro-ph/9801049","kind":"arxiv","version":1}},"canonical_sha256":"27e7b3888fe7fcfca1b7c11b45b1d1c7591c985bc332c87eb37bfca8afd4af14","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"27e7b3888fe7fcfca1b7c11b45b1d1c7591c985bc332c87eb37bfca8afd4af14","first_computed_at":"2026-05-18T01:40:14.509804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:14.509804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cLcna7MCyLeoabHW2c+L71/iZPHGN96Er0JGwQAq7ujVtCljjof54UPlPvx9QoFrt4lM0XbpgmFD2Rhrn3BcAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:14.510480Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9801049","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d601c47b04f251f4794ade781a85007a9d2de0f1de75c689fc98d0c2716c1236","sha256:c055d302d01635f70b5badf519d5b151a6424dc964335a01850e64b2dcdb5521"],"state_sha256":"80e04ae7ee251ce5e67610b75695704ba7d8d557787da7b45563b25bbfc1f010"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cYq8GqxnbgR3ZzUgQS1zBsALwBo1OZLzYao0V3oRoEf1BBF/NQFTco34xuxUnUEiLLrzudzQ0PPoUNnMlXwiBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T21:12:46.482653Z","bundle_sha256":"43d7c45f0ea762fd0ff8444c19793a224b342cf112a03e0447c773c31d63422e"}}