{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:XUXPKCTGKDG6PMO5VFLW2VKSHQ","short_pith_number":"pith:XUXPKCTG","canonical_record":{"source":{"id":"1203.4265","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-19T21:06:34Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"b4601b651fcff5e6059c6ec276ebb3668db8679c9241138a93da74b63629857e","abstract_canon_sha256":"5d048db036e72db636641720f6ff6aee55b7df6acb30501410715552d20f8152"},"schema_version":"1.0"},"canonical_sha256":"bd2ef50a6650cde7b1dda9576d55523c241b4d1baa8f5a6f6e6016be06f40a2d","source":{"kind":"arxiv","id":"1203.4265","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.4265","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"1203.4265v1","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.4265","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"XUXPKCTGKDG6","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XUXPKCTGKDG6PMO5","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XUXPKCTG","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:XUXPKCTGKDG6PMO5VFLW2VKSHQ","target":"record","payload":{"canonical_record":{"source":{"id":"1203.4265","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-19T21:06:34Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"b4601b651fcff5e6059c6ec276ebb3668db8679c9241138a93da74b63629857e","abstract_canon_sha256":"5d048db036e72db636641720f6ff6aee55b7df6acb30501410715552d20f8152"},"schema_version":"1.0"},"canonical_sha256":"bd2ef50a6650cde7b1dda9576d55523c241b4d1baa8f5a6f6e6016be06f40a2d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:05.859036Z","signature_b64":"JZRwfazxH5Ls2Xve73JYJEYzxuxgZ+5VOdmEd+2YWKwDMfbYKKEV4vctOd645dNrpp0O9tsvyaKvvH8FqoLkCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd2ef50a6650cde7b1dda9576d55523c241b4d1baa8f5a6f6e6016be06f40a2d","last_reissued_at":"2026-05-18T01:58:05.858624Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:05.858624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.4265","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":"2026-05-18T01:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"urfEJ4BJuSNPBvBCxHLDsI4plG5MyN4iubANc2E+TE6/IsmK+7EQreoBoO/yJJWgWeA/wClebIJ1hSJRs2xqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:32:48.276228Z"},"content_sha256":"6ab4bd98c02e1d982fa70621a52128fc988ad504bfd98761cd7b5606b61364a6","schema_version":"1.0","event_id":"sha256:6ab4bd98c02e1d982fa70621a52128fc988ad504bfd98761cd7b5606b61364a6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:XUXPKCTGKDG6PMO5VFLW2VKSHQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Detailed optical and near-infrared polarimetry, spectroscopy and broadband photometry of the afterglow of GRB 091018: Polarisation evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.CO","authors_text":"A. de Ugarte Postigo, A. Gomboc, A. J. Levan, A. J. van der Horst, A. Melandri, A. Rossi, A. Rowlinson, C. G. Mundell, C. Guidorzi, C. Kouveliotou, E. Palazzi, E. Rol, I. A. Steele, J. Gorosabel, J. Greiner, J. Hjorth, J. P. U. Fynbo, K. Wiersema, L. Kaper, N. R. Tanvir, P. A. Curran, P. A. Evans, P. Goldoni, P. T. O'Brien, R. A. M. J. Wijers, R. Filgas, R. L. C. Starling, S. Covino, S. D. Vergani, S. Klose, S. Kobayashi, T. Kruehler, V. D'Elia","submitted_at":"2012-03-19T21:06:34Z","abstract_excerpt":"[Abridged] A number of phenomena have been observed in GRB afterglows that defy explanation by simple versions of the standard fireball model, leading to a variety of new models. Polarimetry can be a major independent diagnostic of afterglow physics, probing the magnetic field properties and internal structure of the GRB jets. In this paper we present the first high quality multi-night polarimetric light curve of a Swift GRB afterglow, aimed at providing a well calibrated dataset of a typical afterglow to serve as a benchmark system for modelling afterglow polarisation behaviour. In particular"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.4265","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":"2026-05-18T01:58:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pXPSxmT+/zXIgXl9FPd9op+GhWkU2Vxcr9HOyE/xXwwUIYpYcol4wOAQDb1LOKT03HpZP5cSfdeYGmLlkYeMDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:32:48.276674Z"},"content_sha256":"1c2460266649e6d41b68c9adf2a402437e773dc09f1cedddcad7907082632b28","schema_version":"1.0","event_id":"sha256:1c2460266649e6d41b68c9adf2a402437e773dc09f1cedddcad7907082632b28"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/bundle.json","state_url":"https://pith.science/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/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":"2026-05-27T07:32:48Z","links":{"resolver":"https://pith.science/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ","bundle":"https://pith.science/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/bundle.json","state":"https://pith.science/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XUXPKCTGKDG6PMO5VFLW2VKSHQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:XUXPKCTGKDG6PMO5VFLW2VKSHQ","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":"5d048db036e72db636641720f6ff6aee55b7df6acb30501410715552d20f8152","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-19T21:06:34Z","title_canon_sha256":"b4601b651fcff5e6059c6ec276ebb3668db8679c9241138a93da74b63629857e"},"schema_version":"1.0","source":{"id":"1203.4265","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.4265","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"arxiv_version","alias_value":"1203.4265v1","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.4265","created_at":"2026-05-18T01:58:05Z"},{"alias_kind":"pith_short_12","alias_value":"XUXPKCTGKDG6","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XUXPKCTGKDG6PMO5","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XUXPKCTG","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:1c2460266649e6d41b68c9adf2a402437e773dc09f1cedddcad7907082632b28","target":"graph","created_at":"2026-05-18T01:58:05Z","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":"[Abridged] A number of phenomena have been observed in GRB afterglows that defy explanation by simple versions of the standard fireball model, leading to a variety of new models. Polarimetry can be a major independent diagnostic of afterglow physics, probing the magnetic field properties and internal structure of the GRB jets. In this paper we present the first high quality multi-night polarimetric light curve of a Swift GRB afterglow, aimed at providing a well calibrated dataset of a typical afterglow to serve as a benchmark system for modelling afterglow polarisation behaviour. In particular","authors_text":"A. de Ugarte Postigo, A. Gomboc, A. J. Levan, A. J. van der Horst, A. Melandri, A. Rossi, A. Rowlinson, C. G. Mundell, C. Guidorzi, C. Kouveliotou, E. Palazzi, E. Rol, I. A. Steele, J. Gorosabel, J. Greiner, J. Hjorth, J. P. U. Fynbo, K. Wiersema, L. Kaper, N. R. Tanvir, P. A. Curran, P. A. Evans, P. Goldoni, P. T. O'Brien, R. A. M. J. Wijers, R. Filgas, R. L. C. Starling, S. Covino, S. D. Vergani, S. Klose, S. Kobayashi, T. Kruehler, V. D'Elia","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-19T21:06:34Z","title":"Detailed optical and near-infrared polarimetry, spectroscopy and broadband photometry of the afterglow of GRB 091018: Polarisation evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.4265","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":"sha256:6ab4bd98c02e1d982fa70621a52128fc988ad504bfd98761cd7b5606b61364a6","target":"record","created_at":"2026-05-18T01:58:05Z","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":"5d048db036e72db636641720f6ff6aee55b7df6acb30501410715552d20f8152","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-03-19T21:06:34Z","title_canon_sha256":"b4601b651fcff5e6059c6ec276ebb3668db8679c9241138a93da74b63629857e"},"schema_version":"1.0","source":{"id":"1203.4265","kind":"arxiv","version":1}},"canonical_sha256":"bd2ef50a6650cde7b1dda9576d55523c241b4d1baa8f5a6f6e6016be06f40a2d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd2ef50a6650cde7b1dda9576d55523c241b4d1baa8f5a6f6e6016be06f40a2d","first_computed_at":"2026-05-18T01:58:05.858624Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:05.858624Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JZRwfazxH5Ls2Xve73JYJEYzxuxgZ+5VOdmEd+2YWKwDMfbYKKEV4vctOd645dNrpp0O9tsvyaKvvH8FqoLkCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:05.859036Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.4265","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6ab4bd98c02e1d982fa70621a52128fc988ad504bfd98761cd7b5606b61364a6","sha256:1c2460266649e6d41b68c9adf2a402437e773dc09f1cedddcad7907082632b28"],"state_sha256":"9c51a4d3748ec96dba15541103bcd95c453fea411d0008a7e23316111e98198a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EYo+9W0nq9ldBJDIwdVK7dv88JbR/Cg0jRniuRlHLdAX2mppl9EgE0D8/NniIba+iVV4twjXPgwPNfzluoUiBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:32:48.279637Z","bundle_sha256":"b36505c3aa3bc643709791e1ccc471a192c7bd1f06b499aa222a65f897693095"}}