{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:EGKDLPMIJHSTFSUAELVH7ZFPXV","short_pith_number":"pith:EGKDLPMI","canonical_record":{"source":{"id":"astro-ph/9905032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-05T12:18:37Z","cross_cats_sorted":[],"title_canon_sha256":"03ce8ec1328367e3c5035650df41d582dc0ea9e59ed532cb86304073bf906b82","abstract_canon_sha256":"65d83fdbf40666f1b55642cfeda0bd8579d3c5125344cf85cc8a399006f5a5a3"},"schema_version":"1.0"},"canonical_sha256":"219435bd8849e532ca8022ea7fe4afbd7c26a738bb95f551b60fed076752be6b","source":{"kind":"arxiv","id":"astro-ph/9905032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9905032","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9905032v1","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9905032","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_12","alias_value":"EGKDLPMIJHST","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_16","alias_value":"EGKDLPMIJHSTFSUA","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_8","alias_value":"EGKDLPMI","created_at":"2026-07-04T14:48:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:EGKDLPMIJHSTFSUAELVH7ZFPXV","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9905032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-05T12:18:37Z","cross_cats_sorted":[],"title_canon_sha256":"03ce8ec1328367e3c5035650df41d582dc0ea9e59ed532cb86304073bf906b82","abstract_canon_sha256":"65d83fdbf40666f1b55642cfeda0bd8579d3c5125344cf85cc8a399006f5a5a3"},"schema_version":"1.0"},"canonical_sha256":"219435bd8849e532ca8022ea7fe4afbd7c26a738bb95f551b60fed076752be6b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:48:54.450275Z","signature_b64":"YzVUK2UV/NIGSP6XziKhnfQzZWjtnoOuPdEkWnDeMd+JVSdwvlQW1xgETBTiamAqECQf9DWQEhsIMTFfTRzNCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"219435bd8849e532ca8022ea7fe4afbd7c26a738bb95f551b60fed076752be6b","last_reissued_at":"2026-07-04T14:48:54.449880Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:48:54.449880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9905032","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":"2026-07-04T14:48:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b3QJASVMA0Cv2XBbWxeXNdR+OPBoICysAOGHyFW0NiCPhVzl/HuBjZpzwGldyzvB1R6B+Oiw0L4+8Gr6mSWOCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T10:33:56.843465Z"},"content_sha256":"27fb81c1b8a5d07875d02462391acb84d4f4b788382ef32c71492491f547c5aa","schema_version":"1.0","event_id":"sha256:27fb81c1b8a5d07875d02462391acb84d4f4b788382ef32c71492491f547c5aa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:EGKDLPMIJHSTFSUAELVH7ZFPXV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observations of Mkn 421 during 1997 and 1998 in the energy range above 500 GeV with the HEGRA stereoscopic Cherenkov telescope system","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"et al. ( The HEGRA Collaboration ), F. A. Aharonian","submitted_at":"1999-05-05T12:18:37Z","abstract_excerpt":"Since its commissioning in fall 1996, the stereoscopic system of Imaging Atmospheric Cherenkov Telescope (IACTs) of HEGRA with an energy threshold of 500 GeV, an angular resolution of 0.1 degree and an energy resolution of 20% per individual photon, and an energy flux sensitivity nu F_nu at 1 TeV of 1E-11erg/cm**2 s (S/N = 5 sigma) for one hour of observation time has been used to monitor the BL Lac object Mkn 421 on a regular basis. In this letter, we report detailed temporal and spectral information about the TeV characteristics of Mkn 421 in 1997 and 1998. We study the light curve, the shor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9905032","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/astro-ph/9905032/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":"2026-07-04T14:48:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IQHTUY1ZmMT93MDfw3/Gfx1c9tCkseAmHZig3ARVV52LJbBw/0+QEOTlN9LBaxRc+IanUpxTElGeaELIlROgDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T10:33:56.844224Z"},"content_sha256":"31b0601e242fc49896d0d33a58926eecf1e81668243a0013b8ed3b33816f6d59","schema_version":"1.0","event_id":"sha256:31b0601e242fc49896d0d33a58926eecf1e81668243a0013b8ed3b33816f6d59"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/bundle.json","state_url":"https://pith.science/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/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":"2026-08-12T10:33:56Z","links":{"resolver":"https://pith.science/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV","bundle":"https://pith.science/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/bundle.json","state":"https://pith.science/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EGKDLPMIJHSTFSUAELVH7ZFPXV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:EGKDLPMIJHSTFSUAELVH7ZFPXV","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":"65d83fdbf40666f1b55642cfeda0bd8579d3c5125344cf85cc8a399006f5a5a3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-05T12:18:37Z","title_canon_sha256":"03ce8ec1328367e3c5035650df41d582dc0ea9e59ed532cb86304073bf906b82"},"schema_version":"1.0","source":{"id":"astro-ph/9905032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9905032","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9905032v1","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9905032","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_12","alias_value":"EGKDLPMIJHST","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_16","alias_value":"EGKDLPMIJHSTFSUA","created_at":"2026-07-04T14:48:54Z"},{"alias_kind":"pith_short_8","alias_value":"EGKDLPMI","created_at":"2026-07-04T14:48:54Z"}],"graph_snapshots":[{"event_id":"sha256:31b0601e242fc49896d0d33a58926eecf1e81668243a0013b8ed3b33816f6d59","target":"graph","created_at":"2026-07-04T14:48:54Z","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/astro-ph/9905032/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Since its commissioning in fall 1996, the stereoscopic system of Imaging Atmospheric Cherenkov Telescope (IACTs) of HEGRA with an energy threshold of 500 GeV, an angular resolution of 0.1 degree and an energy resolution of 20% per individual photon, and an energy flux sensitivity nu F_nu at 1 TeV of 1E-11erg/cm**2 s (S/N = 5 sigma) for one hour of observation time has been used to monitor the BL Lac object Mkn 421 on a regular basis. In this letter, we report detailed temporal and spectral information about the TeV characteristics of Mkn 421 in 1997 and 1998. We study the light curve, the shor","authors_text":"et al. ( The HEGRA Collaboration ), F. A. Aharonian","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-05-05T12:18:37Z","title":"Observations of Mkn 421 during 1997 and 1998 in the energy range above 500 GeV with the HEGRA stereoscopic Cherenkov telescope system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9905032","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":"sha256:27fb81c1b8a5d07875d02462391acb84d4f4b788382ef32c71492491f547c5aa","target":"record","created_at":"2026-07-04T14:48:54Z","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":"65d83fdbf40666f1b55642cfeda0bd8579d3c5125344cf85cc8a399006f5a5a3","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-05-05T12:18:37Z","title_canon_sha256":"03ce8ec1328367e3c5035650df41d582dc0ea9e59ed532cb86304073bf906b82"},"schema_version":"1.0","source":{"id":"astro-ph/9905032","kind":"arxiv","version":1}},"canonical_sha256":"219435bd8849e532ca8022ea7fe4afbd7c26a738bb95f551b60fed076752be6b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"219435bd8849e532ca8022ea7fe4afbd7c26a738bb95f551b60fed076752be6b","first_computed_at":"2026-07-04T14:48:54.449880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:48:54.449880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YzVUK2UV/NIGSP6XziKhnfQzZWjtnoOuPdEkWnDeMd+JVSdwvlQW1xgETBTiamAqECQf9DWQEhsIMTFfTRzNCA==","signature_status":"signed_v1","signed_at":"2026-07-04T14:48:54.450275Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9905032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:27fb81c1b8a5d07875d02462391acb84d4f4b788382ef32c71492491f547c5aa","sha256:31b0601e242fc49896d0d33a58926eecf1e81668243a0013b8ed3b33816f6d59"],"state_sha256":"7826e51f48ae361a1ca28e4d7b001bd79ba9da4adf1d2de1814ee12c348985f9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"A3wlEQlh5NqPzB/BJiltwgb5ETEnclm69S/mftXro13dm9aW024vCW56Xn/cC6v+ZJFhihbV5wo7VOmwcWBVBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T10:33:56.850111Z","bundle_sha256":"28ddcc104efd6c480ffb2448bd48c4286a63776eb5a766adea30d47cdbb1bd58"}}