{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2007:2URDZO2OQHPUNSM5YVEZO22ZAH","short_pith_number":"pith:2URDZO2O","canonical_record":{"source":{"id":"0710.2858","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-15T16:25:09Z","cross_cats_sorted":[],"title_canon_sha256":"6e33414af1f9efc2c5d5e7da0273951f43447cd18f145bc95371c47b5f899c37","abstract_canon_sha256":"0b10995cd72f0c5820bba21dda60a599789f84c88ef0ed1736eb945e5b45041e"},"schema_version":"1.0"},"canonical_sha256":"d5223cbb4e81df46c99dc549976b5901d9a199d57138933e523d97842eaf9471","source":{"kind":"arxiv","id":"0710.2858","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.2858","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"0710.2858v1","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.2858","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"2URDZO2OQHPU","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_16","alias_value":"2URDZO2OQHPUNSM5","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_8","alias_value":"2URDZO2O","created_at":"2026-07-04T15:10:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2007:2URDZO2OQHPUNSM5YVEZO22ZAH","target":"record","payload":{"canonical_record":{"source":{"id":"0710.2858","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-15T16:25:09Z","cross_cats_sorted":[],"title_canon_sha256":"6e33414af1f9efc2c5d5e7da0273951f43447cd18f145bc95371c47b5f899c37","abstract_canon_sha256":"0b10995cd72f0c5820bba21dda60a599789f84c88ef0ed1736eb945e5b45041e"},"schema_version":"1.0"},"canonical_sha256":"d5223cbb4e81df46c99dc549976b5901d9a199d57138933e523d97842eaf9471","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:10:59.924088Z","signature_b64":"TXfZkYV9VHotYD+wk6U0K8wvK+c6XUW9fpooa8J5XToRgRwmMIM69sL/nFAk94w+c7jhu1dnuwnGc/Cu9Q2gDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5223cbb4e81df46c99dc549976b5901d9a199d57138933e523d97842eaf9471","last_reissued_at":"2026-07-04T15:10:59.923668Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:10:59.923668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0710.2858","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:10:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8N/lkh9Ce32EO+dr9tkGSQEvC+t2YehzytXioJ9nx7woSxb2dSwLtuc8wcxrslDAWkdw6HThhgZmRQ2xurPAAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T20:10:34.440367Z"},"content_sha256":"9ff7b464698baf253e19fde6354f72bc6ec9069263c17ef2d5aaeaa7b470f17f","schema_version":"1.0","event_id":"sha256:9ff7b464698baf253e19fde6354f72bc6ec9069263c17ef2d5aaeaa7b470f17f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2007:2URDZO2OQHPUNSM5YVEZO22ZAH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of an unexpected hardening in the spectrum of GRB 021206","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"C. Wigger, E. Bellm, O. Wigger, W. Hajdas","submitted_at":"2007-10-15T16:25:09Z","abstract_excerpt":"GRB 021206 is one of the brightest GRBs ever observed. Its prompt emission, as measured by RHESSI, shows an unexpected spectral feature. The spectrum has a peak energy of about 700 keV and can be described by a Band function up to 4.5 MeV. Above 4.5 MeV, the spectrum hardens again, so that the Band function fails to fit the whole RHESSI energy range up to 17 MeV. Nor does the sum of a blackbody function plus a power law, even though such a function can describe a spectral hardening. The cannonball model on the other hand predicts such a hardening, and we found that it fits the spectrum of GRB "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.2858","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0710.2858/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:10:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k8/DthqEhtIZkFGmrxIzjRAAsN1+ln9xSmJJLapX3Co+48vvtB01P4LnhBXWHNQwgEbt8D/xGl6f3Q97pcqXDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-08T20:10:34.440745Z"},"content_sha256":"38ad642265631b51711e993488aefa930eaa4894b28c6ad1544df76c84f0d1b5","schema_version":"1.0","event_id":"sha256:38ad642265631b51711e993488aefa930eaa4894b28c6ad1544df76c84f0d1b5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/bundle.json","state_url":"https://pith.science/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/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":"2026-07-08T20:10:34Z","links":{"resolver":"https://pith.science/pith/2URDZO2OQHPUNSM5YVEZO22ZAH","bundle":"https://pith.science/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/bundle.json","state":"https://pith.science/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2URDZO2OQHPUNSM5YVEZO22ZAH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2007:2URDZO2OQHPUNSM5YVEZO22ZAH","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":"0b10995cd72f0c5820bba21dda60a599789f84c88ef0ed1736eb945e5b45041e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-15T16:25:09Z","title_canon_sha256":"6e33414af1f9efc2c5d5e7da0273951f43447cd18f145bc95371c47b5f899c37"},"schema_version":"1.0","source":{"id":"0710.2858","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0710.2858","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"arxiv_version","alias_value":"0710.2858v1","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0710.2858","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_12","alias_value":"2URDZO2OQHPU","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_16","alias_value":"2URDZO2OQHPUNSM5","created_at":"2026-07-04T15:10:59Z"},{"alias_kind":"pith_short_8","alias_value":"2URDZO2O","created_at":"2026-07-04T15:10:59Z"}],"graph_snapshots":[{"event_id":"sha256:38ad642265631b51711e993488aefa930eaa4894b28c6ad1544df76c84f0d1b5","target":"graph","created_at":"2026-07-04T15:10:59Z","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/0710.2858/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"GRB 021206 is one of the brightest GRBs ever observed. Its prompt emission, as measured by RHESSI, shows an unexpected spectral feature. The spectrum has a peak energy of about 700 keV and can be described by a Band function up to 4.5 MeV. Above 4.5 MeV, the spectrum hardens again, so that the Band function fails to fit the whole RHESSI energy range up to 17 MeV. Nor does the sum of a blackbody function plus a power law, even though such a function can describe a spectral hardening. The cannonball model on the other hand predicts such a hardening, and we found that it fits the spectrum of GRB ","authors_text":"C. Wigger, E. Bellm, O. Wigger, W. Hajdas","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2007-10-15T16:25:09Z","title":"Observation of an unexpected hardening in the spectrum of GRB 021206"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.2858","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":"sha256:9ff7b464698baf253e19fde6354f72bc6ec9069263c17ef2d5aaeaa7b470f17f","target":"record","created_at":"2026-07-04T15:10:59Z","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":"0b10995cd72f0c5820bba21dda60a599789f84c88ef0ed1736eb945e5b45041e","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2007-10-15T16:25:09Z","title_canon_sha256":"6e33414af1f9efc2c5d5e7da0273951f43447cd18f145bc95371c47b5f899c37"},"schema_version":"1.0","source":{"id":"0710.2858","kind":"arxiv","version":1}},"canonical_sha256":"d5223cbb4e81df46c99dc549976b5901d9a199d57138933e523d97842eaf9471","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5223cbb4e81df46c99dc549976b5901d9a199d57138933e523d97842eaf9471","first_computed_at":"2026-07-04T15:10:59.923668Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:10:59.923668Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"TXfZkYV9VHotYD+wk6U0K8wvK+c6XUW9fpooa8J5XToRgRwmMIM69sL/nFAk94w+c7jhu1dnuwnGc/Cu9Q2gDQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:10:59.924088Z","signed_message":"canonical_sha256_bytes"},"source_id":"0710.2858","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9ff7b464698baf253e19fde6354f72bc6ec9069263c17ef2d5aaeaa7b470f17f","sha256:38ad642265631b51711e993488aefa930eaa4894b28c6ad1544df76c84f0d1b5"],"state_sha256":"b9101ad57378fffff0ec53cc524c3d162b4307003aafb069385ea2c82fd1d148"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7+M/Q8pKVYlSVVtoI9eE171wV3W2ME3bR6OyolLshC35AZuyKcxBTnZ2L1kF6mB8UeQU0gGfR2tS875RlEK4Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-08T20:10:34.442986Z","bundle_sha256":"b2e6db1a23f305d036fb5d00d88a8f8134c1a63637f752091529d576a72e114a"}}