{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:X25CQZB3LUE7DSSW7LSZFLIM5F","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":"407c4e85b45ec1e47328a545e34d2c46cbf6fe3390eea626cc1fb8ea2b659ac8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-08-04T20:42:55Z","title_canon_sha256":"089679cb09cac011c5dacd7a9b0629148540b57def396150fbbe9e05df02359a"},"schema_version":"1.0","source":{"id":"2108.02282","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.02282","created_at":"2026-07-05T03:03:41Z"},{"alias_kind":"arxiv_version","alias_value":"2108.02282v1","created_at":"2026-07-05T03:03:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.02282","created_at":"2026-07-05T03:03:41Z"},{"alias_kind":"pith_short_12","alias_value":"X25CQZB3LUE7","created_at":"2026-07-05T03:03:41Z"},{"alias_kind":"pith_short_16","alias_value":"X25CQZB3LUE7DSSW","created_at":"2026-07-05T03:03:41Z"},{"alias_kind":"pith_short_8","alias_value":"X25CQZB3","created_at":"2026-07-05T03:03:41Z"}],"graph_snapshots":[{"event_id":"sha256:63069e89b01775c75cca68cd7b1e6166571c74fb3f1117163499faa2330c8fa9","target":"graph","created_at":"2026-07-05T03:03:41Z","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/2108.02282/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present here, follow-up observations of four Binary black hole BBH events performed with the High Energy Stereoscopic System (H.E.S.S.) in the Very High Energy (VHE) gamma-ray domain during the second and third LIGO/Virgo observation runs. Detailed analyses of the obtained data did not show significant VHE emission. We derive integral upper limit maps considering a generic $E^{-2}$ source spectrum in the most sensitive H.E.S.S energy interval ranging from 1 to 10 TeV. We also consider Extragalactic Background Light absorption effects and derive integral upper limits over the full accessible","authors_text":"Clemens Hoischen, Fabian Sch\\\"ussler, Francois Brun, Halim Ashkar, Heike Prokoph, Monica Seglar Arroyo, Ruslan Konno, Stefan Ohm, Sylvia J Zhu (on behalf of the H.E.S.S. Collaboration)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-08-04T20:42:55Z","title":"H.E.S.S. follow-up of BBH merger events"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.02282","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":"sha256:3d69e13ac609161903da06dede2adaa93d3277d162343680984a7fd40748abd5","target":"record","created_at":"2026-07-05T03:03:41Z","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":"407c4e85b45ec1e47328a545e34d2c46cbf6fe3390eea626cc1fb8ea2b659ac8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2021-08-04T20:42:55Z","title_canon_sha256":"089679cb09cac011c5dacd7a9b0629148540b57def396150fbbe9e05df02359a"},"schema_version":"1.0","source":{"id":"2108.02282","kind":"arxiv","version":1}},"canonical_sha256":"beba28643b5d09f1ca56fae592ad0ce9551c0dd88085a6050803027e1d191c69","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"beba28643b5d09f1ca56fae592ad0ce9551c0dd88085a6050803027e1d191c69","first_computed_at":"2026-07-05T03:03:41.831742Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:03:41.831742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k9iW8rJumj8sj7Pvo1P5qAwRCnTSJH1Us1kSOjaS6wgc3mQXdd9Nm/JgdTAju74rwal9y8tLBum+OOcoOWFSCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:03:41.832180Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.02282","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d69e13ac609161903da06dede2adaa93d3277d162343680984a7fd40748abd5","sha256:63069e89b01775c75cca68cd7b1e6166571c74fb3f1117163499faa2330c8fa9"],"state_sha256":"712d2240354051c5d5f3ac7267f59f2d0291d29a4d8613c48f2bddc741210502"}