{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:OOXVSNNVJXF2EPYZC2YVKPVRQG","short_pith_number":"pith:OOXVSNNV","canonical_record":{"source":{"id":"1008.2253","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-08-13T04:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"830d5674ef6aa34515d2caf4f042ab7ec52e8a04df893683aae1af26c1d5158d","abstract_canon_sha256":"b63434a8b8319445b2d0e64f9bb3e75fb96cbcdbd7dec4dff09de6eaeea90b05"},"schema_version":"1.0"},"canonical_sha256":"73af5935b54dcba23f1916b1553eb181a7ec6f6b4d5aacd36fe8fb3ce0ae9b3e","source":{"kind":"arxiv","id":"1008.2253","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2253","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2253v2","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2253","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"pith_short_12","alias_value":"OOXVSNNVJXF2","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OOXVSNNVJXF2EPYZ","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OOXVSNNV","created_at":"2026-05-18T12:26:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:OOXVSNNVJXF2EPYZC2YVKPVRQG","target":"record","payload":{"canonical_record":{"source":{"id":"1008.2253","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-08-13T04:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"830d5674ef6aa34515d2caf4f042ab7ec52e8a04df893683aae1af26c1d5158d","abstract_canon_sha256":"b63434a8b8319445b2d0e64f9bb3e75fb96cbcdbd7dec4dff09de6eaeea90b05"},"schema_version":"1.0"},"canonical_sha256":"73af5935b54dcba23f1916b1553eb181a7ec6f6b4d5aacd36fe8fb3ce0ae9b3e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:56:47.369996Z","signature_b64":"k8SxBjwB5Ov70akQmhvWxORWPWJKgiVDLbyFJSvNE5sik88kP7Sij0subgC3WdtW9JzR6q1ndVio7gsdgYsMBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"73af5935b54dcba23f1916b1553eb181a7ec6f6b4d5aacd36fe8fb3ce0ae9b3e","last_reissued_at":"2026-05-18T00:56:47.369500Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:56:47.369500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1008.2253","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:56:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WUoD6MdJauN8RGshCRCf7DWCiaPf+8TumMwtJJqGYM8cgDNqY8sRPF4Y/11S8o0qXLhgzq+esxhaUolIDzIYBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:51:39.567128Z"},"content_sha256":"e1f52f3e2c8b56c6b016b1975d40132780b72c0e0a08bbdbc2d7c44f225d0b40","schema_version":"1.0","event_id":"sha256:e1f52f3e2c8b56c6b016b1975d40132780b72c0e0a08bbdbc2d7c44f225d0b40"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:OOXVSNNVJXF2EPYZC2YVKPVRQG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Revised Limit of the Lorentz Factors of GRBs with Two Emitting Regions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Tsvi Piran, Yi-Zhong Fan, Yuan-Chuan Zou","submitted_at":"2010-08-13T04:55:21Z","abstract_excerpt":"Fermi observations of GeV emission from GRBs have suggested that the Lorentz factor of some GRBs is around a thousand or even higher. At the same time the same Fermi observations have shown an extended GeV emission indicating that this higher energy emission might be a part of the afterglow and it does not come from the same region as the lower energy prompt emission. If this interpretation is correct than we should reconsider the opacity limits on the Loretnz factor of the emitting regions which are based on a one-zone model. We describe here a two-zone model in which the GeV photons are emit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2253","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T00:56:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1Pv09O3KrypWUwDAR9PCFGHoCLQQ9HUTUEk1OxJxOVEofRkB1EeYJN5EnFhhbi3oKcCuiB5LukuqlMboIaBeCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T19:51:39.567919Z"},"content_sha256":"014895d7212418fc07cfa55dad54a4a7bdf5dadb41ced48768515009212883a3","schema_version":"1.0","event_id":"sha256:014895d7212418fc07cfa55dad54a4a7bdf5dadb41ced48768515009212883a3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/bundle.json","state_url":"https://pith.science/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/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":"2026-05-31T19:51:39Z","links":{"resolver":"https://pith.science/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG","bundle":"https://pith.science/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/bundle.json","state":"https://pith.science/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OOXVSNNVJXF2EPYZC2YVKPVRQG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:OOXVSNNVJXF2EPYZC2YVKPVRQG","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":"b63434a8b8319445b2d0e64f9bb3e75fb96cbcdbd7dec4dff09de6eaeea90b05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-08-13T04:55:21Z","title_canon_sha256":"830d5674ef6aa34515d2caf4f042ab7ec52e8a04df893683aae1af26c1d5158d"},"schema_version":"1.0","source":{"id":"1008.2253","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1008.2253","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"arxiv_version","alias_value":"1008.2253v2","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1008.2253","created_at":"2026-05-18T00:56:47Z"},{"alias_kind":"pith_short_12","alias_value":"OOXVSNNVJXF2","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_16","alias_value":"OOXVSNNVJXF2EPYZ","created_at":"2026-05-18T12:26:12Z"},{"alias_kind":"pith_short_8","alias_value":"OOXVSNNV","created_at":"2026-05-18T12:26:12Z"}],"graph_snapshots":[{"event_id":"sha256:014895d7212418fc07cfa55dad54a4a7bdf5dadb41ced48768515009212883a3","target":"graph","created_at":"2026-05-18T00:56:47Z","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":"Fermi observations of GeV emission from GRBs have suggested that the Lorentz factor of some GRBs is around a thousand or even higher. At the same time the same Fermi observations have shown an extended GeV emission indicating that this higher energy emission might be a part of the afterglow and it does not come from the same region as the lower energy prompt emission. If this interpretation is correct than we should reconsider the opacity limits on the Loretnz factor of the emitting regions which are based on a one-zone model. We describe here a two-zone model in which the GeV photons are emit","authors_text":"Tsvi Piran, Yi-Zhong Fan, Yuan-Chuan Zou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-08-13T04:55:21Z","title":"A Revised Limit of the Lorentz Factors of GRBs with Two Emitting Regions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.2253","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:e1f52f3e2c8b56c6b016b1975d40132780b72c0e0a08bbdbc2d7c44f225d0b40","target":"record","created_at":"2026-05-18T00:56:47Z","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":"b63434a8b8319445b2d0e64f9bb3e75fb96cbcdbd7dec4dff09de6eaeea90b05","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2010-08-13T04:55:21Z","title_canon_sha256":"830d5674ef6aa34515d2caf4f042ab7ec52e8a04df893683aae1af26c1d5158d"},"schema_version":"1.0","source":{"id":"1008.2253","kind":"arxiv","version":2}},"canonical_sha256":"73af5935b54dcba23f1916b1553eb181a7ec6f6b4d5aacd36fe8fb3ce0ae9b3e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"73af5935b54dcba23f1916b1553eb181a7ec6f6b4d5aacd36fe8fb3ce0ae9b3e","first_computed_at":"2026-05-18T00:56:47.369500Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:56:47.369500Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k8SxBjwB5Ov70akQmhvWxORWPWJKgiVDLbyFJSvNE5sik88kP7Sij0subgC3WdtW9JzR6q1ndVio7gsdgYsMBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:56:47.369996Z","signed_message":"canonical_sha256_bytes"},"source_id":"1008.2253","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e1f52f3e2c8b56c6b016b1975d40132780b72c0e0a08bbdbc2d7c44f225d0b40","sha256:014895d7212418fc07cfa55dad54a4a7bdf5dadb41ced48768515009212883a3"],"state_sha256":"ed82a14ddf15128a15239a2fa084a16f9cf6a11599e60feb54c9e7384a74a62e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qnvU3R5zq4r60bx8sL0x+wSqT7mBiIFU4Mnoo4XdPmtH8DpqBITlouWJN115eMqbEilmIat7TDVl2ZWVDKXLDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T19:51:39.572089Z","bundle_sha256":"ff1c8852b99f8bb086f83b5cc1d8c702e86fbbf0d1f1c6524f7b05a62f3c8112"}}