{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:TPG7ONHDOSBOKU6WBCEUWHWSMH","short_pith_number":"pith:TPG7ONHD","canonical_record":{"source":{"id":"0912.4800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-24T06:30:46Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a42cbb773a2456001f42025b1ef5df87b0c0e8c7acaae182f14bba79e44b3c2d","abstract_canon_sha256":"372a25ae000a2c61a90c70fd6e972faf59b4d74cc87d6efb0d772a64ac11ffbe"},"schema_version":"1.0"},"canonical_sha256":"9bcdf734e37482e553d608894b1ed261f6f04eac96b2b35a1598911abde6df56","source":{"kind":"arxiv","id":"0912.4800","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4800","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4800v1","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4800","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"TPG7ONHDOSBO","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TPG7ONHDOSBOKU6W","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TPG7ONHD","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:TPG7ONHDOSBOKU6WBCEUWHWSMH","target":"record","payload":{"canonical_record":{"source":{"id":"0912.4800","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-24T06:30:46Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"a42cbb773a2456001f42025b1ef5df87b0c0e8c7acaae182f14bba79e44b3c2d","abstract_canon_sha256":"372a25ae000a2c61a90c70fd6e972faf59b4d74cc87d6efb0d772a64ac11ffbe"},"schema_version":"1.0"},"canonical_sha256":"9bcdf734e37482e553d608894b1ed261f6f04eac96b2b35a1598911abde6df56","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:34:00.473679Z","signature_b64":"2DDGmL3EwoMJtPQSSMdcw5wGsYOWsEVsidnElhURpNmEe12GPDPhTVtcJlpV96t2S5jbtWF0mBjTFYZyNd2KCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bcdf734e37482e553d608894b1ed261f6f04eac96b2b35a1598911abde6df56","last_reissued_at":"2026-05-18T04:34:00.473143Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:34:00.473143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.4800","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":"2026-05-18T04:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GwTmNzI5GW5mtTjXdLk9nuRcFPCy0+1ZrvsUxaZDjxbO+J+FQLMBnl4VBmW8K2yOZ9ZkZkoUxFiTaLd8uCdxDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:56:55.488854Z"},"content_sha256":"3e281c72c314975fd7bf69af124cf526b648f306b87c9e559ef286d0c234328d","schema_version":"1.0","event_id":"sha256:3e281c72c314975fd7bf69af124cf526b648f306b87c9e559ef286d0c234328d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:TPG7ONHDOSBOKU6WBCEUWHWSMH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining GRB Initial Lorentz Factor with the Afterglow Onset Feature and Discovery of a Tight Gamma_0-E_iso Correlation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.HE","authors_text":"Bin-Bin Zhang (UNLV), Bing Zhang (UNLV), En-Wei Liang (GXU, Hou-Jun LV (GXU), Jin Zhang (GXTU), Shuang-xi Yi (GXU), Unlv)","submitted_at":"2009-12-24T06:30:46Z","abstract_excerpt":"The onset of GRB afterglow is characterized by a smooth bump in the early afterglow lightcurve. We make an extensive search for such a feature. Twenty optically selected GRBs and 12 X-ray selected GRBs are found, among which 17 optically selected GRBs and 2 X-ray-selected GRBs have redshift measurements. We fit the lightcurves with a smooth broken power-law and measure the temporal characteristic timescales of the bumps at FWHM. Strong mutual correlations among these timescales are found, and a dimmer and broader bump tends to peak at a later peak time. The ratio of rising to decaying timescal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4800","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":""},"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":"2026-05-18T04:34:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OtYaKbaTinIUtniZyd9Vl/0+5UQNLOqtEUzKHmxBbVU1dRG+rfujyO4d+8xAzFJEBJGgJmah8B6D6HVATTUjDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T16:56:55.489199Z"},"content_sha256":"5ff0d684f2f0f895aea932ef8df39b610afcdd2c26539c3c1926dde8016c4f8d","schema_version":"1.0","event_id":"sha256:5ff0d684f2f0f895aea932ef8df39b610afcdd2c26539c3c1926dde8016c4f8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/bundle.json","state_url":"https://pith.science/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/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":"2026-06-01T16:56:55Z","links":{"resolver":"https://pith.science/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH","bundle":"https://pith.science/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/bundle.json","state":"https://pith.science/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TPG7ONHDOSBOKU6WBCEUWHWSMH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:TPG7ONHDOSBOKU6WBCEUWHWSMH","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":"372a25ae000a2c61a90c70fd6e972faf59b4d74cc87d6efb0d772a64ac11ffbe","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-24T06:30:46Z","title_canon_sha256":"a42cbb773a2456001f42025b1ef5df87b0c0e8c7acaae182f14bba79e44b3c2d"},"schema_version":"1.0","source":{"id":"0912.4800","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4800","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4800v1","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4800","created_at":"2026-05-18T04:34:00Z"},{"alias_kind":"pith_short_12","alias_value":"TPG7ONHDOSBO","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"TPG7ONHDOSBOKU6W","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"TPG7ONHD","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:5ff0d684f2f0f895aea932ef8df39b610afcdd2c26539c3c1926dde8016c4f8d","target":"graph","created_at":"2026-05-18T04:34:00Z","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":"The onset of GRB afterglow is characterized by a smooth bump in the early afterglow lightcurve. We make an extensive search for such a feature. Twenty optically selected GRBs and 12 X-ray selected GRBs are found, among which 17 optically selected GRBs and 2 X-ray-selected GRBs have redshift measurements. We fit the lightcurves with a smooth broken power-law and measure the temporal characteristic timescales of the bumps at FWHM. Strong mutual correlations among these timescales are found, and a dimmer and broader bump tends to peak at a later peak time. The ratio of rising to decaying timescal","authors_text":"Bin-Bin Zhang (UNLV), Bing Zhang (UNLV), En-Wei Liang (GXU, Hou-Jun LV (GXU), Jin Zhang (GXTU), Shuang-xi Yi (GXU), Unlv)","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-24T06:30:46Z","title":"Constraining GRB Initial Lorentz Factor with the Afterglow Onset Feature and Discovery of a Tight Gamma_0-E_iso Correlation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4800","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":"sha256:3e281c72c314975fd7bf69af124cf526b648f306b87c9e559ef286d0c234328d","target":"record","created_at":"2026-05-18T04:34:00Z","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":"372a25ae000a2c61a90c70fd6e972faf59b4d74cc87d6efb0d772a64ac11ffbe","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2009-12-24T06:30:46Z","title_canon_sha256":"a42cbb773a2456001f42025b1ef5df87b0c0e8c7acaae182f14bba79e44b3c2d"},"schema_version":"1.0","source":{"id":"0912.4800","kind":"arxiv","version":1}},"canonical_sha256":"9bcdf734e37482e553d608894b1ed261f6f04eac96b2b35a1598911abde6df56","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9bcdf734e37482e553d608894b1ed261f6f04eac96b2b35a1598911abde6df56","first_computed_at":"2026-05-18T04:34:00.473143Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:34:00.473143Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2DDGmL3EwoMJtPQSSMdcw5wGsYOWsEVsidnElhURpNmEe12GPDPhTVtcJlpV96t2S5jbtWF0mBjTFYZyNd2KCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:34:00.473679Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.4800","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e281c72c314975fd7bf69af124cf526b648f306b87c9e559ef286d0c234328d","sha256:5ff0d684f2f0f895aea932ef8df39b610afcdd2c26539c3c1926dde8016c4f8d"],"state_sha256":"cbed23e5292e079d0b7d9a4a08dfe09b150d33da0c8fb223bb319bfaa70f33b5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2wnU0dfjTDbesZjzzz6GEpewUuN/389lkp8dhF4sSPHhvnClshzADOWgju1wYBM3LMGwP/NQ0XJ3/qVpkJ1LDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T16:56:55.491089Z","bundle_sha256":"7d51a7c1a3302cab15a58558ce115b16634e1443c2b5fe0632204c6d3f6ed0c9"}}