{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:JUSWWOBTXNE4VRIV5GHQKOKNWJ","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":"9da81bebd284d51886ae501917c6493ad0e398c6e07b8134cd8be1746feb24b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-05T18:12:49Z","title_canon_sha256":"c87653a43ff41342f8c5b4b1eb5d406ca92b61b303eeaf696117610b32b35561"},"schema_version":"1.0","source":{"id":"1706.01481","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.01481","created_at":"2026-05-18T00:05:34Z"},{"alias_kind":"arxiv_version","alias_value":"1706.01481v2","created_at":"2026-05-18T00:05:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.01481","created_at":"2026-05-18T00:05:34Z"},{"alias_kind":"pith_short_12","alias_value":"JUSWWOBTXNE4","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"JUSWWOBTXNE4VRIV","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"JUSWWOBT","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:d80d6dd4858a2f5e222a39c1c6fafe955d39334a25b25a38f2f5502e92e3c8a9","target":"graph","created_at":"2026-05-18T00:05:34Z","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":"We analyze the prompt emission of GRB 100724B and GRB 160509A, two of the brightest Gamma-Ray Bursts (GRBs) observed by Fermi at $\\lesssim{\\rm MeV}$ energies but surprisingly faint at $\\gtrsim100\\;$MeV energies. Time-resolved spectroscopy reveals a sharp high-energy cutoff at energies $E_c\\sim20-60\\;$MeV for GRB~100724B and $E_c\\sim80-150\\;$MeV for GRB~160509A. We first characterize phenomenologically the cutoff and its time evolution. We then fit the data to two models where the high-energy cutoff arises from intrinsic opacity to pair production within the source ($\\tau_{\\gamma\\gamma}$): (i) ","authors_text":"F. Longo, G. Vianello, J. Cohen-Tanugi, J. Granot, N. Omodei, R. Gill","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-05T18:12:49Z","title":"The Bright and the Slow -- GRBs 100724B \\& 160509A with high-energy cutoffs at $\\lesssim100\\;$MeV"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.01481","kind":"arxiv","version":2},"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:cb6cc7ef65d82d67328585e535b55cffdb5cf764e85e5543f26883c39e82414e","target":"record","created_at":"2026-05-18T00:05:34Z","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":"9da81bebd284d51886ae501917c6493ad0e398c6e07b8134cd8be1746feb24b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2017-06-05T18:12:49Z","title_canon_sha256":"c87653a43ff41342f8c5b4b1eb5d406ca92b61b303eeaf696117610b32b35561"},"schema_version":"1.0","source":{"id":"1706.01481","kind":"arxiv","version":2}},"canonical_sha256":"4d256b3833bb49cac515e98f05394db25da106f2cde1f823cfa21db37ae62181","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d256b3833bb49cac515e98f05394db25da106f2cde1f823cfa21db37ae62181","first_computed_at":"2026-05-18T00:05:34.491531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:34.491531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cdePwIyMycWTXRRk8y/AeoLKuoEDJhvUd9ofiDTfLk8JK9CXWp5shjnMNg9XhtzU4HQJ0Vnqr50ISq0sJgutBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:34.491920Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.01481","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb6cc7ef65d82d67328585e535b55cffdb5cf764e85e5543f26883c39e82414e","sha256:d80d6dd4858a2f5e222a39c1c6fafe955d39334a25b25a38f2f5502e92e3c8a9"],"state_sha256":"cc2bbe2841b61784e3c4bd64655f166c3f6d5b9a95352138469044f51ac8086e"}