{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:XQA7REFIIGH7YVMHCIT6CADQDW","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":"b099dd4b44fec980f5284dedf58741c8492990277ae2d7a61ec348904d8b2d5c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-07T19:14:00Z","title_canon_sha256":"67e4812c0ba0587b514491c2a2af5f4cd4deaa3dbf1e716c0dc3ec1c45f8bd49"},"schema_version":"1.0","source":{"id":"1101.1503","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1101.1503","created_at":"2026-05-18T02:23:00Z"},{"alias_kind":"arxiv_version","alias_value":"1101.1503v2","created_at":"2026-05-18T02:23:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1101.1503","created_at":"2026-05-18T02:23:00Z"},{"alias_kind":"pith_short_12","alias_value":"XQA7REFIIGH7","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_16","alias_value":"XQA7REFIIGH7YVMH","created_at":"2026-05-18T12:26:47Z"},{"alias_kind":"pith_short_8","alias_value":"XQA7REFI","created_at":"2026-05-18T12:26:47Z"}],"graph_snapshots":[{"event_id":"sha256:17392a30a52e3d67886e6fbbe23b316ae836b025b80513b808916298b4109652","target":"graph","created_at":"2026-05-18T02:23:00Z","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 brightness of gamma-ray burst (GRB) afterglows and their occurrence in young, blue galaxies make them excellent probes to study star forming regions in the distant Universe. We here elucidate dust extinction properties in the early Universe through the analysis of the afterglows of all known z > 6 GRBs: GRB 090423, 080913 and 050904, at z = 8.2, 6.69, and 6.295, respectively. We gather all available optical and near-infrared photometry, spectroscopy and X-ray data to construct spectral energy distributions (SEDs) at multiple epochs. We then fit the SEDs at all epochs with a dust-attenuated","authors_text":"1 Nial R. Tanvir (2), (2) Univ. Leicester, (3) Univ. Warwick), Darach J. Watson (1), Johan P. U. Fynbo (1), Rhaana L. C. Starling (2) Andrew J. Levan (3) ((1) DARK, Tayyaba Zafar (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-07T19:14:00Z","title":"Exploring dust extinction at the edge of reionization"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1503","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":"sha256:9599f716e398e39f56272e5012f3b3bf3a37cec92ff1b407911c1d2757b8cec3","target":"record","created_at":"2026-05-18T02:23:00Z","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":"b099dd4b44fec980f5284dedf58741c8492990277ae2d7a61ec348904d8b2d5c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2011-01-07T19:14:00Z","title_canon_sha256":"67e4812c0ba0587b514491c2a2af5f4cd4deaa3dbf1e716c0dc3ec1c45f8bd49"},"schema_version":"1.0","source":{"id":"1101.1503","kind":"arxiv","version":2}},"canonical_sha256":"bc01f890a8418ffc55871227e100701daa38dc2b59ae90294e779564b942e759","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc01f890a8418ffc55871227e100701daa38dc2b59ae90294e779564b942e759","first_computed_at":"2026-05-18T02:23:00.003164Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:23:00.003164Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BPBQqA5LvxeEPwDuRQK6tjKwEu1PpfSGU+fRoqXMpn68yxqKRtZ3htIkPD0P5OBYK214KEAybNfkEvyM7hm7Bg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:23:00.003793Z","signed_message":"canonical_sha256_bytes"},"source_id":"1101.1503","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9599f716e398e39f56272e5012f3b3bf3a37cec92ff1b407911c1d2757b8cec3","sha256:17392a30a52e3d67886e6fbbe23b316ae836b025b80513b808916298b4109652"],"state_sha256":"58c749cec19399a7534f25b22f5904b2d911ba78ef2df6c18868043bb46701de"}