{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:QOXZHVHNAINOUSZTGFATVS42DO","short_pith_number":"pith:QOXZHVHN","canonical_record":{"source":{"id":"1507.00873","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-03T11:11:23Z","cross_cats_sorted":[],"title_canon_sha256":"2247ac607fe2df8eeedcde4a246018009ecae52504ef23eff3d0b253acaad9f2","abstract_canon_sha256":"ac06e032ae9a339b7963f9c955d96fc94a219a648201397287afc3db8564ceac"},"schema_version":"1.0"},"canonical_sha256":"83af93d4ed021aea4b3331413acb9a1b96825377ff1c6ec72d5a4afeba6f8002","source":{"kind":"arxiv","id":"1507.00873","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00873","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00873v2","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00873","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"pith_short_12","alias_value":"QOXZHVHNAINO","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QOXZHVHNAINOUSZT","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QOXZHVHN","created_at":"2026-05-18T12:29:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:QOXZHVHNAINOUSZTGFATVS42DO","target":"record","payload":{"canonical_record":{"source":{"id":"1507.00873","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-03T11:11:23Z","cross_cats_sorted":[],"title_canon_sha256":"2247ac607fe2df8eeedcde4a246018009ecae52504ef23eff3d0b253acaad9f2","abstract_canon_sha256":"ac06e032ae9a339b7963f9c955d96fc94a219a648201397287afc3db8564ceac"},"schema_version":"1.0"},"canonical_sha256":"83af93d4ed021aea4b3331413acb9a1b96825377ff1c6ec72d5a4afeba6f8002","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:27:23.243014Z","signature_b64":"eaT+u80bZQfhaZGeqZTUQZvzReJVYli5jdvP7SU4ejxR3uozOwDs0r0gLL1qQA7DT7g2ijx1kDz7SiroMMzuAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"83af93d4ed021aea4b3331413acb9a1b96825377ff1c6ec72d5a4afeba6f8002","last_reissued_at":"2026-05-18T01:27:23.242483Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:27:23.242483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.00873","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":"2026-05-18T01:27:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s9bDUBRI1V+cVnMntjjwXZshgZgvO1EO8q3eTo3qPmO/rT4/p7zmpvh8pZih7pV3HimaMGbhYn8BUG9q/nqmDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:56:48.233213Z"},"content_sha256":"c051eb9a505bfb061ef463487ef8f8d182339bc93e7395a2560e8c4edbb70a92","schema_version":"1.0","event_id":"sha256:c051eb9a505bfb061ef463487ef8f8d182339bc93e7395a2560e8c4edbb70a92"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:QOXZHVHNAINOUSZTGFATVS42DO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hydrodynamic properties of gamma-ray bursts outflows deduced from thermal component","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"Asaf Pe'er, Davide Lazzatti, Felix Ryde, Hugh Barlow, Josefin Larsson, Mario Livio, Raffaella Margutti, Shane O'Mahony","submitted_at":"2015-07-03T11:11:23Z","abstract_excerpt":"We study the properties of a significant thermal emission component that was identified in 47 GRBs observed by different instruments. Within the framework of the \"fireball\" model, we deduce the values of the Lorentz factor Gamma, and the acceleration radius, r_0, for these bursts. We find that all the values of Gamma in our sample are in the range 10^2 <= Gamma <= 10^3, with <Gamma> = 370. We find a very weak dependence of Gamma on the acceleration radius r_0, Gamma ~ r_0^alpha with alpha = -0.10 +- 0.09 at sigma = 2.1 confidence level. The values of r_0 span a wide range, 10^6.5 <= r_0 <= 10^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00873","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":"2026-05-18T01:27:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mos4MRgMwQTV8NwIFHeCDTymBSW09ZWlX1PfILNlrfsTvbldyeJonTsMOzAUFnIO7G8Tnpt3ICcfuF0omgAOBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T02:56:48.233917Z"},"content_sha256":"019399348e6dee3948020d8c464dc369a1c062cbe910524e0739ad6337ec77aa","schema_version":"1.0","event_id":"sha256:019399348e6dee3948020d8c464dc369a1c062cbe910524e0739ad6337ec77aa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QOXZHVHNAINOUSZTGFATVS42DO/bundle.json","state_url":"https://pith.science/pith/QOXZHVHNAINOUSZTGFATVS42DO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QOXZHVHNAINOUSZTGFATVS42DO/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":"2026-05-26T02:56:48Z","links":{"resolver":"https://pith.science/pith/QOXZHVHNAINOUSZTGFATVS42DO","bundle":"https://pith.science/pith/QOXZHVHNAINOUSZTGFATVS42DO/bundle.json","state":"https://pith.science/pith/QOXZHVHNAINOUSZTGFATVS42DO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QOXZHVHNAINOUSZTGFATVS42DO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QOXZHVHNAINOUSZTGFATVS42DO","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":"ac06e032ae9a339b7963f9c955d96fc94a219a648201397287afc3db8564ceac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-03T11:11:23Z","title_canon_sha256":"2247ac607fe2df8eeedcde4a246018009ecae52504ef23eff3d0b253acaad9f2"},"schema_version":"1.0","source":{"id":"1507.00873","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.00873","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"arxiv_version","alias_value":"1507.00873v2","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.00873","created_at":"2026-05-18T01:27:23Z"},{"alias_kind":"pith_short_12","alias_value":"QOXZHVHNAINO","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QOXZHVHNAINOUSZT","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QOXZHVHN","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:019399348e6dee3948020d8c464dc369a1c062cbe910524e0739ad6337ec77aa","target":"graph","created_at":"2026-05-18T01:27:23Z","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 study the properties of a significant thermal emission component that was identified in 47 GRBs observed by different instruments. Within the framework of the \"fireball\" model, we deduce the values of the Lorentz factor Gamma, and the acceleration radius, r_0, for these bursts. We find that all the values of Gamma in our sample are in the range 10^2 <= Gamma <= 10^3, with <Gamma> = 370. We find a very weak dependence of Gamma on the acceleration radius r_0, Gamma ~ r_0^alpha with alpha = -0.10 +- 0.09 at sigma = 2.1 confidence level. The values of r_0 span a wide range, 10^6.5 <= r_0 <= 10^","authors_text":"Asaf Pe'er, Davide Lazzatti, Felix Ryde, Hugh Barlow, Josefin Larsson, Mario Livio, Raffaella Margutti, Shane O'Mahony","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-03T11:11:23Z","title":"Hydrodynamic properties of gamma-ray bursts outflows deduced from thermal component"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.00873","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:c051eb9a505bfb061ef463487ef8f8d182339bc93e7395a2560e8c4edbb70a92","target":"record","created_at":"2026-05-18T01:27:23Z","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":"ac06e032ae9a339b7963f9c955d96fc94a219a648201397287afc3db8564ceac","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2015-07-03T11:11:23Z","title_canon_sha256":"2247ac607fe2df8eeedcde4a246018009ecae52504ef23eff3d0b253acaad9f2"},"schema_version":"1.0","source":{"id":"1507.00873","kind":"arxiv","version":2}},"canonical_sha256":"83af93d4ed021aea4b3331413acb9a1b96825377ff1c6ec72d5a4afeba6f8002","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83af93d4ed021aea4b3331413acb9a1b96825377ff1c6ec72d5a4afeba6f8002","first_computed_at":"2026-05-18T01:27:23.242483Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:23.242483Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eaT+u80bZQfhaZGeqZTUQZvzReJVYli5jdvP7SU4ejxR3uozOwDs0r0gLL1qQA7DT7g2ijx1kDz7SiroMMzuAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:23.243014Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.00873","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c051eb9a505bfb061ef463487ef8f8d182339bc93e7395a2560e8c4edbb70a92","sha256:019399348e6dee3948020d8c464dc369a1c062cbe910524e0739ad6337ec77aa"],"state_sha256":"48e11aa30be9c78c57a662696a6b7a27c46c12607f03c5f36287b4e13e08113e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i4INHIx969tp1aYSm4AvUbK+KHc7uF2+q+6KIeXS5sohQzdNqZF6b0vnsFzB66PwObt+NRbGkXmpxN3hmtR3Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T02:56:48.237901Z","bundle_sha256":"3bd2c1102d874173a02c62dec2fec3acbde8daa757fe7165f4a043d4cc4f0ac0"}}