{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:OJ3S5HRX5MOD6ANXOSNMGPWDU7","short_pith_number":"pith:OJ3S5HRX","canonical_record":{"source":{"id":"astro-ph/9903088","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-03-05T15:15:09Z","cross_cats_sorted":[],"title_canon_sha256":"44c51050c3c7ee9412add67184b3ceadbbf7d000cba5a93bc30c39c5b12e42e9","abstract_canon_sha256":"c6e196052f06d156f5e13fca7692d138d3ce7bb7a0ba55c81bba4b23cdd4cb36"},"schema_version":"1.0"},"canonical_sha256":"72772e9e37eb1c3f01b7749ac33ec3a7e86205b9be1a081d8031e527e4ef2620","source":{"kind":"arxiv","id":"astro-ph/9903088","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9903088","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9903088v1","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9903088","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_12","alias_value":"OJ3S5HRX5MOD","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_16","alias_value":"OJ3S5HRX5MOD6ANX","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_8","alias_value":"OJ3S5HRX","created_at":"2026-07-04T16:10:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:OJ3S5HRX5MOD6ANXOSNMGPWDU7","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/9903088","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1999-03-05T15:15:09Z","cross_cats_sorted":[],"title_canon_sha256":"44c51050c3c7ee9412add67184b3ceadbbf7d000cba5a93bc30c39c5b12e42e9","abstract_canon_sha256":"c6e196052f06d156f5e13fca7692d138d3ce7bb7a0ba55c81bba4b23cdd4cb36"},"schema_version":"1.0"},"canonical_sha256":"72772e9e37eb1c3f01b7749ac33ec3a7e86205b9be1a081d8031e527e4ef2620","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:10:46.262671Z","signature_b64":"tzumhL4cXN8UjJyOPCA7vS2aojzfAcpFgb9y4znpbojBHAFocvsN79Zt8p9d+PBiqZwFXYOK09GP5mUzeBNcAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"72772e9e37eb1c3f01b7749ac33ec3a7e86205b9be1a081d8031e527e4ef2620","last_reissued_at":"2026-07-04T16:10:46.262148Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:10:46.262148Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/9903088","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":"2026-07-04T16:10:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xyId+DQn9GSdm2Lb41i87KIbzpA/Fs14/LTiMN/r5c78Q0MdkvlijjKUcWyxyfPwcNm7t1CFFgbw2MheIaWaCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:12:49.060178Z"},"content_sha256":"48ff204285081f7a6808daddd3fd59bc16ac61eda51ced89639877dd827d08ee","schema_version":"1.0","event_id":"sha256:48ff204285081f7a6808daddd3fd59bc16ac61eda51ced89639877dd827d08ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:OJ3S5HRX5MOD6ANXOSNMGPWDU7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Flux Variability of Markarian 501 in Very High Energy Gamma Rays","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. C. Breslin, A. J. Rodgers, A. M. Burdett, A. M. Hillas, C. Masterson, D. A. Carter-Lewis, D. J. Fegan, F. Krennrich, F. W. Samuelson, G. H. Sembroski, H. J. Rose, I. H. Bond, J. A. Gaidos, J. Bussons Gordo, J. E. McEnery, J. H. Buckley, J. P. Finley, J. Quinn, M. Catanese, M. F. Cawley, P. J. Boyle, P. Moriarty, R. C. Lamb, R. Srinivasan, R. W. Lessard, S. M. Bradbury, T. C. Weekes, T. Hall, V. V. Vassiliev","submitted_at":"1999-03-05T15:15:09Z","abstract_excerpt":"The BL Lacertae object Markarian 501 was identified as a source of gamma-ray emission at the Whipple Observatory in March 1995. Here we present a flux variability analysis on several times-scales of the 233 hour data set accumulated over 213 nights (from March 1995 to July 1998) with the Whipple Observatory 10 m atmospheric Cherenkov imaging telescope. In 1995, with the exception of a single night, the flux from Markarian 501 was constant on daily and monthly time-scales and had an average flux of only 10% that of the Crab Nebula, making it the weakest VHE source detected to date. In 1996, the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9903088","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/9903088/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":"2026-07-04T16:10:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WHQrhtGbhMSDQqJU+DXB+u9ecox3a+XzR/BK5pv+Pdd48PitBg0YKgDxU8dYx9x8tGNwUvAuChKlvyrq5GAoCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T06:12:49.060751Z"},"content_sha256":"e737ccbeb7e9f2e9dd4c060ba1c3ee718f2d411d9f0c297c7a1c066c716291f3","schema_version":"1.0","event_id":"sha256:e737ccbeb7e9f2e9dd4c060ba1c3ee718f2d411d9f0c297c7a1c066c716291f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/bundle.json","state_url":"https://pith.science/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/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":"2026-08-07T06:12:49Z","links":{"resolver":"https://pith.science/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7","bundle":"https://pith.science/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/bundle.json","state":"https://pith.science/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OJ3S5HRX5MOD6ANXOSNMGPWDU7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:OJ3S5HRX5MOD6ANXOSNMGPWDU7","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":"c6e196052f06d156f5e13fca7692d138d3ce7bb7a0ba55c81bba4b23cdd4cb36","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-03-05T15:15:09Z","title_canon_sha256":"44c51050c3c7ee9412add67184b3ceadbbf7d000cba5a93bc30c39c5b12e42e9"},"schema_version":"1.0","source":{"id":"astro-ph/9903088","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9903088","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9903088v1","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9903088","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_12","alias_value":"OJ3S5HRX5MOD","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_16","alias_value":"OJ3S5HRX5MOD6ANX","created_at":"2026-07-04T16:10:46Z"},{"alias_kind":"pith_short_8","alias_value":"OJ3S5HRX","created_at":"2026-07-04T16:10:46Z"}],"graph_snapshots":[{"event_id":"sha256:e737ccbeb7e9f2e9dd4c060ba1c3ee718f2d411d9f0c297c7a1c066c716291f3","target":"graph","created_at":"2026-07-04T16:10:46Z","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/9903088/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The BL Lacertae object Markarian 501 was identified as a source of gamma-ray emission at the Whipple Observatory in March 1995. Here we present a flux variability analysis on several times-scales of the 233 hour data set accumulated over 213 nights (from March 1995 to July 1998) with the Whipple Observatory 10 m atmospheric Cherenkov imaging telescope. In 1995, with the exception of a single night, the flux from Markarian 501 was constant on daily and monthly time-scales and had an average flux of only 10% that of the Crab Nebula, making it the weakest VHE source detected to date. In 1996, the","authors_text":"A. C. Breslin, A. J. Rodgers, A. M. Burdett, A. M. Hillas, C. Masterson, D. A. Carter-Lewis, D. J. Fegan, F. Krennrich, F. W. Samuelson, G. H. Sembroski, H. J. Rose, I. H. Bond, J. A. Gaidos, J. Bussons Gordo, J. E. McEnery, J. H. Buckley, J. P. Finley, J. Quinn, M. Catanese, M. F. Cawley, P. J. Boyle, P. Moriarty, R. C. Lamb, R. Srinivasan, R. W. Lessard, S. M. Bradbury, T. C. Weekes, T. Hall, V. V. Vassiliev","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"1999-03-05T15:15:09Z","title":"The Flux Variability of Markarian 501 in Very High Energy Gamma Rays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9903088","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":"sha256:48ff204285081f7a6808daddd3fd59bc16ac61eda51ced89639877dd827d08ee","target":"record","created_at":"2026-07-04T16:10:46Z","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":"c6e196052f06d156f5e13fca7692d138d3ce7bb7a0ba55c81bba4b23cdd4cb36","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"1999-03-05T15:15:09Z","title_canon_sha256":"44c51050c3c7ee9412add67184b3ceadbbf7d000cba5a93bc30c39c5b12e42e9"},"schema_version":"1.0","source":{"id":"astro-ph/9903088","kind":"arxiv","version":1}},"canonical_sha256":"72772e9e37eb1c3f01b7749ac33ec3a7e86205b9be1a081d8031e527e4ef2620","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"72772e9e37eb1c3f01b7749ac33ec3a7e86205b9be1a081d8031e527e4ef2620","first_computed_at":"2026-07-04T16:10:46.262148Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:10:46.262148Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tzumhL4cXN8UjJyOPCA7vS2aojzfAcpFgb9y4znpbojBHAFocvsN79Zt8p9d+PBiqZwFXYOK09GP5mUzeBNcAA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:10:46.262671Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/9903088","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48ff204285081f7a6808daddd3fd59bc16ac61eda51ced89639877dd827d08ee","sha256:e737ccbeb7e9f2e9dd4c060ba1c3ee718f2d411d9f0c297c7a1c066c716291f3"],"state_sha256":"4b534d717f5c9453ffa013b874b1f2db14de28f8ca730e39d20fcc1021800595"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"05ZdjP+HQrVs5ZFrAZOyUGWFV6NfesI3i2FWH/tfZ0whoMPPmnhbkbUKTdyqD1H7g7DI8aUoR6Gdtb44FUPLCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T06:12:49.064580Z","bundle_sha256":"48dd389825af646ba9b365ee7fa8036d6c6352a1aac84057243253f9ca050fb9"}}