{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:2S5FOU7UA7NZLPLD3CUWMLTMLQ","short_pith_number":"pith:2S5FOU7U","canonical_record":{"source":{"id":"0910.5726","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-29T23:54:46Z","cross_cats_sorted":[],"title_canon_sha256":"59f1799ebb80a3a8021f2e2f5b2a835c2cd0630acf06082c74d96151554b9955","abstract_canon_sha256":"f71f90f1162dd23672d7390036d7460de787e37511d5daf9247b050f90a84c07"},"schema_version":"1.0"},"canonical_sha256":"d4ba5753f407db95bd63d8a9662e6c5c2ff5088ad363056a7e9b23db2eea4f75","source":{"kind":"arxiv","id":"0910.5726","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5726","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5726v2","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5726","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"pith_short_12","alias_value":"2S5FOU7UA7NZ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"2S5FOU7UA7NZLPLD","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"2S5FOU7U","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:2S5FOU7UA7NZLPLD3CUWMLTMLQ","target":"record","payload":{"canonical_record":{"source":{"id":"0910.5726","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-29T23:54:46Z","cross_cats_sorted":[],"title_canon_sha256":"59f1799ebb80a3a8021f2e2f5b2a835c2cd0630acf06082c74d96151554b9955","abstract_canon_sha256":"f71f90f1162dd23672d7390036d7460de787e37511d5daf9247b050f90a84c07"},"schema_version":"1.0"},"canonical_sha256":"d4ba5753f407db95bd63d8a9662e6c5c2ff5088ad363056a7e9b23db2eea4f75","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:33:39.888081Z","signature_b64":"6XO7WgtPWXPb60ahBfOSiva+NMhOEy4cffDK0jjSTFPGRqB8pKN4TeeGumf83dKZXSzbOtu2PoZ7sZHGPfJ2Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d4ba5753f407db95bd63d8a9662e6c5c2ff5088ad363056a7e9b23db2eea4f75","last_reissued_at":"2026-05-18T04:33:39.887576Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:33:39.887576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.5726","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":"2026-05-18T04:33:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VxQRSZtpmfFFj4xZPYPDARDj48Af6ve0V42puhyH8QN27pVYRDIYOgl9GsY0QNGgzLESF1XgpyW+/8jmSTAhCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:17:21.121742Z"},"content_sha256":"b680dc3e2289c6d16ee0ce805fe1dbf0fa9e49630362ad6cf21d2208aef705ca","schema_version":"1.0","event_id":"sha256:b680dc3e2289c6d16ee0ce805fe1dbf0fa9e49630362ad6cf21d2208aef705ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:2S5FOU7UA7NZLPLD3CUWMLTMLQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"External forward shock origin of high energy emission for three GRBs detected by Fermi","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Pawan Kumar, Rodolfo Barniol Duran","submitted_at":"2009-10-29T23:54:46Z","abstract_excerpt":"We analyze the >100MeV data for 3 GRBs detected by Fermi (GRBs 080916C, 090510, 090902B) and find that these photons were generated via synchrotron emission in the external forward shock. We arrive at this conclusion by four different methods as follows. (1) We check the light curve and spectral behavior of the >100MeV data, and late time X-ray and optical data, and find them consistent with the closure relations for the external forward shock radiation. (2) We calculate the expected external forward shock synchrotron flux at 100MeV, and it matches the observed flux value. (3) We determine the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5726","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":"2026-05-18T04:33:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oQv2+H26GO3D3V3eAukDawkNxOcGym/vaLUvUK07by22LsMfHOa29fCljtrTZO863/vRK6wU6/eTgiU+uFjUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:17:21.122402Z"},"content_sha256":"d3ffa41606a5ffdacf004c57566e21b3e3b1fedb8275b432e9c476398d700be6","schema_version":"1.0","event_id":"sha256:d3ffa41606a5ffdacf004c57566e21b3e3b1fedb8275b432e9c476398d700be6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/bundle.json","state_url":"https://pith.science/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/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":"2026-05-28T18:17:21Z","links":{"resolver":"https://pith.science/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ","bundle":"https://pith.science/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/bundle.json","state":"https://pith.science/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2S5FOU7UA7NZLPLD3CUWMLTMLQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:2S5FOU7UA7NZLPLD3CUWMLTMLQ","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":"f71f90f1162dd23672d7390036d7460de787e37511d5daf9247b050f90a84c07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-29T23:54:46Z","title_canon_sha256":"59f1799ebb80a3a8021f2e2f5b2a835c2cd0630acf06082c74d96151554b9955"},"schema_version":"1.0","source":{"id":"0910.5726","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5726","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5726v2","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5726","created_at":"2026-05-18T04:33:39Z"},{"alias_kind":"pith_short_12","alias_value":"2S5FOU7UA7NZ","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"2S5FOU7UA7NZLPLD","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"2S5FOU7U","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:d3ffa41606a5ffdacf004c57566e21b3e3b1fedb8275b432e9c476398d700be6","target":"graph","created_at":"2026-05-18T04:33:39Z","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 >100MeV data for 3 GRBs detected by Fermi (GRBs 080916C, 090510, 090902B) and find that these photons were generated via synchrotron emission in the external forward shock. We arrive at this conclusion by four different methods as follows. (1) We check the light curve and spectral behavior of the >100MeV data, and late time X-ray and optical data, and find them consistent with the closure relations for the external forward shock radiation. (2) We calculate the expected external forward shock synchrotron flux at 100MeV, and it matches the observed flux value. (3) We determine the","authors_text":"Pawan Kumar, Rodolfo Barniol Duran","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-29T23:54:46Z","title":"External forward shock origin of high energy emission for three GRBs detected by Fermi"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5726","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:b680dc3e2289c6d16ee0ce805fe1dbf0fa9e49630362ad6cf21d2208aef705ca","target":"record","created_at":"2026-05-18T04:33:39Z","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":"f71f90f1162dd23672d7390036d7460de787e37511d5daf9247b050f90a84c07","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-10-29T23:54:46Z","title_canon_sha256":"59f1799ebb80a3a8021f2e2f5b2a835c2cd0630acf06082c74d96151554b9955"},"schema_version":"1.0","source":{"id":"0910.5726","kind":"arxiv","version":2}},"canonical_sha256":"d4ba5753f407db95bd63d8a9662e6c5c2ff5088ad363056a7e9b23db2eea4f75","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d4ba5753f407db95bd63d8a9662e6c5c2ff5088ad363056a7e9b23db2eea4f75","first_computed_at":"2026-05-18T04:33:39.887576Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:33:39.887576Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6XO7WgtPWXPb60ahBfOSiva+NMhOEy4cffDK0jjSTFPGRqB8pKN4TeeGumf83dKZXSzbOtu2PoZ7sZHGPfJ2Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:33:39.888081Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.5726","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b680dc3e2289c6d16ee0ce805fe1dbf0fa9e49630362ad6cf21d2208aef705ca","sha256:d3ffa41606a5ffdacf004c57566e21b3e3b1fedb8275b432e9c476398d700be6"],"state_sha256":"0013f5150176db83186302a65227e80f88dc04f5304ab6d4d052a49c55ce2b5b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N655/O5T81Sc4Y8oM+D0AyQx0zhRA1NUzZAk7VEuLe2IVxU/FwmQyeuP+UO4i5Hg1v1VwHnH06pGtR/8Dv7QAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:17:21.125643Z","bundle_sha256":"2fbb0d67ceeff44c1e08337af2f6fa9f3bf4d4c8f6c08876b69609332132c677"}}