{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:YORC4BNJOQ7WQVYPTG7TPJXICO","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":"380321e2ba758b2432a3588fb62ced1b12a06a3a2d150ecd65091c533d396f57","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-07-23T16:16:59Z","title_canon_sha256":"7d31da63271671a9a4f4173ff94d29d636beff5722b6c973afd3a1cf9447f4f7"},"schema_version":"1.0","source":{"id":"astro-ph/0207506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0207506","created_at":"2026-07-04T15:18:00Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0207506v1","created_at":"2026-07-04T15:18:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0207506","created_at":"2026-07-04T15:18:00Z"},{"alias_kind":"pith_short_12","alias_value":"YORC4BNJOQ7W","created_at":"2026-07-04T15:18:00Z"},{"alias_kind":"pith_short_16","alias_value":"YORC4BNJOQ7WQVYP","created_at":"2026-07-04T15:18:00Z"},{"alias_kind":"pith_short_8","alias_value":"YORC4BNJ","created_at":"2026-07-04T15:18:00Z"}],"graph_snapshots":[{"event_id":"sha256:1d25eb781c12c04ce19aa1ea5ceced8b4a68e952ea617fba0d96b4edf3356da2","target":"graph","created_at":"2026-07-04T15:18:00Z","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/0207506/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The BL Lac object H1426+428 was recently detected as a high energy gamma-ray source by the VERITAS collaboration (Horan et al. 2002). We have reanalyzed the 2001 portion of the data used in the detection in order to examine the spectrum of H1426+428 above 250 GeV. We find that the time-averaged spectrum agrees with a power law of the shape dF/dE = 10^(-7.31 +- 0.15(stat) +- 0.16(syst)) x E^(-3.50 +- 0.35(stat) +- 0.05(syst)) m^(-2)s^(-1)TeV^(-1) The statistical evidence from our data for emission above 2.5 TeV is 2.6 sigma. With 95% c.l., the integral flux of H1426+428 above 2.5 TeV is larger ","authors_text":"A. Falcone, A.M. Hillas, B. Power-Mooney, C. Duke, D.A. Carter-Lewis, D. Horan, D.J. Fegan, D. Kieda, D. M\\\"uller, D. Petry, F. Krennrich, G.H. Sembroski, G. Walker, H.J. Rose, I. de la Calle Perez, I.H. Bond, J.A. Gaidos, J. Hall, J.H. Buckley, J. Holder, J. Kildea, J. Knapp, J.P. Finley, J. Quinn, K. Gibbs, K. Kosack, M. Jordan, M. Kertzman, M. Page, M. Schroedter, N. Stanton, N.W. Reay, P. Moriarty, P.T. Reynolds, R. Ong, R. Pallassini, R. Sidwell, S. Gammell, S.J. Fegan, S. LeBohec, S.M. Bradbury, S.P. Swordy, S.P. Wakely, T.A. Hall, T.C. Weekes, T.N. Nagai, V.V. Vassiliev, W. Cui","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2002-07-23T16:16:59Z","title":"The TeV spectrum of H1426+428"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0207506","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:c668e2e4c4b7c494da956bb2a66311b6900f26adbaca373cff81866ec06b7e54","target":"record","created_at":"2026-07-04T15:18:00Z","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":"380321e2ba758b2432a3588fb62ced1b12a06a3a2d150ecd65091c533d396f57","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2002-07-23T16:16:59Z","title_canon_sha256":"7d31da63271671a9a4f4173ff94d29d636beff5722b6c973afd3a1cf9447f4f7"},"schema_version":"1.0","source":{"id":"astro-ph/0207506","kind":"arxiv","version":1}},"canonical_sha256":"c3a22e05a9743f68570f99bf37a6e81385434232cfb8e1303f90e290b4e34f0d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c3a22e05a9743f68570f99bf37a6e81385434232cfb8e1303f90e290b4e34f0d","first_computed_at":"2026-07-04T15:18:00.466970Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:18:00.466970Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PCh+iqMfUi8XzibJNnqiC7sm4QOMCa+p/0kFsnCInZskGaVAxBtgbJVTblKBwDVEyTQF/qy6UR1qYgHOL460BA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:18:00.467500Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0207506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c668e2e4c4b7c494da956bb2a66311b6900f26adbaca373cff81866ec06b7e54","sha256:1d25eb781c12c04ce19aa1ea5ceced8b4a68e952ea617fba0d96b4edf3356da2"],"state_sha256":"ea50ddefc0ef7b83086f8f0ab1bad381dbb7f37262f8f1b094099db52192bd2d"}