{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2003:KHSLFRIQD5UHYQHWWDMO6PCQJL","short_pith_number":"pith:KHSLFRIQ","canonical_record":{"source":{"id":"astro-ph/0305227","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-13T14:47:13Z","cross_cats_sorted":[],"title_canon_sha256":"a722df138390520c6a1a2955c877c8c0fd4790bf95949dc99bb199a63dcbb2fe","abstract_canon_sha256":"c3f55255c59a66a238bbc244932ffde860d4cfe4fb414dabee7d03e0ced484f7"},"schema_version":"1.0"},"canonical_sha256":"51e4b2c5101f687c40f6b0d8ef3c504ae4f23781c8af643602bff86ca5beb3e0","source":{"kind":"arxiv","id":"astro-ph/0305227","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0305227","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305227v2","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305227","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_12","alias_value":"KHSLFRIQD5UH","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"KHSLFRIQD5UHYQHW","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"KHSLFRIQ","created_at":"2026-07-04T15:32:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2003:KHSLFRIQD5UHYQHWWDMO6PCQJL","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0305227","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-13T14:47:13Z","cross_cats_sorted":[],"title_canon_sha256":"a722df138390520c6a1a2955c877c8c0fd4790bf95949dc99bb199a63dcbb2fe","abstract_canon_sha256":"c3f55255c59a66a238bbc244932ffde860d4cfe4fb414dabee7d03e0ced484f7"},"schema_version":"1.0"},"canonical_sha256":"51e4b2c5101f687c40f6b0d8ef3c504ae4f23781c8af643602bff86ca5beb3e0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:32:02.553657Z","signature_b64":"OLkwFk4+mz2mwytZDjP/NZCqpPd4pVWh4lpP3dGyLjubQ/kAA9W0XSQ9nkgBjf10lnf1jt9ceRyJnFBAta3MDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"51e4b2c5101f687c40f6b0d8ef3c504ae4f23781c8af643602bff86ca5beb3e0","last_reissued_at":"2026-07-04T15:32:02.553216Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:32:02.553216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0305227","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":"2026-07-04T15:32:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"USrCKTu2Iy5V0lxKqOe8Ni67TPbEktk/T0fHrAoEMi9AmEYYRi5JhzRKDWGGab3weDV2oNm+oU23KWOD1uF1DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:53:12.742683Z"},"content_sha256":"24cb4cd6949f0b74d5eb4d645763ae86f5e38eb41889a0e2d3c3c361c6d9b411","schema_version":"1.0","event_id":"sha256:24cb4cd6949f0b74d5eb4d645763ae86f5e38eb41889a0e2d3c3c361c6d9b411"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2003:KHSLFRIQD5UHYQHWWDMO6PCQJL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Variable polarization in the optical afterglow of GRB 021004","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. J. Castro-Tirado, A. S. Fruchter, C. Kouveliotou, E. Palazzi, E. Pian, E. P. J. van den Heuvel, E. Rol, H. Pedersen, I. Burud, I. Salamanca, J. Gorosabel, J. Hjorth, J. M. Castro Cer\\'on, J. P. U. Fynbo, J. Rhoads, L. Kaper, M. P. Egholm, N. Masetti, N. Tanvir, P. Moller, P. Vreeswijk, R. A. M. J. Wijers","submitted_at":"2003-05-13T14:47:13Z","abstract_excerpt":"We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the observations shows a 45 degree change in the position angle from 9 hours after the burst to 16 hours after the burst, and comparison with published data from later epochs even shows a 90 degree change between 9 and 89 hours after the burst. The degree of linear polarization shows a marginal change, but is also consistent with being constant in time. In the context o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305227","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/astro-ph/0305227/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":"2026-07-04T15:32:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AsxrirWpGR1N8AuGdHbSJD2QKwpWHD8kotiPgk4IzRFvhy48vArOS8CJ+UL5qlVhfbGgavX9MbD17N1fnOcZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T19:53:12.743418Z"},"content_sha256":"c4bad8b88e64b0c850c6ef84d702f94b4bc87c66801699b6058c1f8367244c70","schema_version":"1.0","event_id":"sha256:c4bad8b88e64b0c850c6ef84d702f94b4bc87c66801699b6058c1f8367244c70"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/bundle.json","state_url":"https://pith.science/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/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":"2026-08-06T19:53:12Z","links":{"resolver":"https://pith.science/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL","bundle":"https://pith.science/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/bundle.json","state":"https://pith.science/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KHSLFRIQD5UHYQHWWDMO6PCQJL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:KHSLFRIQD5UHYQHWWDMO6PCQJL","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":"c3f55255c59a66a238bbc244932ffde860d4cfe4fb414dabee7d03e0ced484f7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-13T14:47:13Z","title_canon_sha256":"a722df138390520c6a1a2955c877c8c0fd4790bf95949dc99bb199a63dcbb2fe"},"schema_version":"1.0","source":{"id":"astro-ph/0305227","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0305227","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0305227v2","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0305227","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_12","alias_value":"KHSLFRIQD5UH","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_16","alias_value":"KHSLFRIQD5UHYQHW","created_at":"2026-07-04T15:32:02Z"},{"alias_kind":"pith_short_8","alias_value":"KHSLFRIQ","created_at":"2026-07-04T15:32:02Z"}],"graph_snapshots":[{"event_id":"sha256:c4bad8b88e64b0c850c6ef84d702f94b4bc87c66801699b6058c1f8367244c70","target":"graph","created_at":"2026-07-04T15:32:02Z","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/astro-ph/0305227/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present polarimetric observations of the afterglow of gamma-ray burst (GRB) 021004, obtained with the Nordic Optical Telescope (NOT) and the Very Large Telescope (VLT) between 8 and 17 hours after the burst. Comparison among the observations shows a 45 degree change in the position angle from 9 hours after the burst to 16 hours after the burst, and comparison with published data from later epochs even shows a 90 degree change between 9 and 89 hours after the burst. The degree of linear polarization shows a marginal change, but is also consistent with being constant in time. In the context o","authors_text":"A. J. Castro-Tirado, A. S. Fruchter, C. Kouveliotou, E. Palazzi, E. Pian, E. P. J. van den Heuvel, E. Rol, H. Pedersen, I. Burud, I. Salamanca, J. Gorosabel, J. Hjorth, J. M. Castro Cer\\'on, J. P. U. Fynbo, J. Rhoads, L. Kaper, M. P. Egholm, N. Masetti, N. Tanvir, P. Moller, P. Vreeswijk, R. A. M. J. Wijers","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2003-05-13T14:47:13Z","title":"Variable polarization in the optical afterglow of GRB 021004"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0305227","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":"sha256:24cb4cd6949f0b74d5eb4d645763ae86f5e38eb41889a0e2d3c3c361c6d9b411","target":"record","created_at":"2026-07-04T15:32:02Z","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":"c3f55255c59a66a238bbc244932ffde860d4cfe4fb414dabee7d03e0ced484f7","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2003-05-13T14:47:13Z","title_canon_sha256":"a722df138390520c6a1a2955c877c8c0fd4790bf95949dc99bb199a63dcbb2fe"},"schema_version":"1.0","source":{"id":"astro-ph/0305227","kind":"arxiv","version":2}},"canonical_sha256":"51e4b2c5101f687c40f6b0d8ef3c504ae4f23781c8af643602bff86ca5beb3e0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"51e4b2c5101f687c40f6b0d8ef3c504ae4f23781c8af643602bff86ca5beb3e0","first_computed_at":"2026-07-04T15:32:02.553216Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:32:02.553216Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OLkwFk4+mz2mwytZDjP/NZCqpPd4pVWh4lpP3dGyLjubQ/kAA9W0XSQ9nkgBjf10lnf1jt9ceRyJnFBAta3MDw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:32:02.553657Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0305227","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:24cb4cd6949f0b74d5eb4d645763ae86f5e38eb41889a0e2d3c3c361c6d9b411","sha256:c4bad8b88e64b0c850c6ef84d702f94b4bc87c66801699b6058c1f8367244c70"],"state_sha256":"02a7811a5fb4eef4c21f162b3d75d7aff3b091a4b8b679b453976a0bfea10db2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kA+XZYyFv5Y3eYiGAgH4pwy35955Hsw8jSorGrz5OwDdKcesvJN+yPVPoALk7Vu6IKno+d/BNkHhcQM3pVNTCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T19:53:12.751595Z","bundle_sha256":"ef995439c1029c3602a32bf547c430b6f7abf69964a925376a8b27903140d0c0"}}