{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:KKXY46SBCHF7FRCZ6CAZ7U4IN4","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":"c831d8f66d95e0025dd5b224ab18bc61211c06eadb66ed97b19148e4206ed58b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-09-16T21:05:32Z","title_canon_sha256":"a3323dc9ed32aa7eb6d9fd998fc561c31ccd720ca4b4aa05d965bd2238dd5980"},"schema_version":"1.0","source":{"id":"1409.4804","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.4804","created_at":"2026-05-18T01:34:50Z"},{"alias_kind":"arxiv_version","alias_value":"1409.4804v2","created_at":"2026-05-18T01:34:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.4804","created_at":"2026-05-18T01:34:50Z"},{"alias_kind":"pith_short_12","alias_value":"KKXY46SBCHF7","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_16","alias_value":"KKXY46SBCHF7FRCZ","created_at":"2026-05-18T12:28:35Z"},{"alias_kind":"pith_short_8","alias_value":"KKXY46SB","created_at":"2026-05-18T12:28:35Z"}],"graph_snapshots":[{"event_id":"sha256:36aeb54f3146ef055547864b2c317ed4eed476d26442a8d8342760c13ad64791","target":"graph","created_at":"2026-05-18T01:34:50Z","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 reionisation of the Universe is thought to have ended around z~6, as inferred from spectroscopy of distant bright background sources, such as quasars (QSO) and gamma-ray burst (GRB) afterglows. Furthermore, spectroscopy of a GRB afterglow provides insight in its host galaxy, which is often too dim and distant to study otherwise. We present the high S/N VLT/X-shooter spectrum of GRB130606A at z=5.913. We aim to measure the degree of ionisation of the IGM between 5.02<z<5.84 and to study the chemical abundance pattern and dust content of its host galaxy. We measured the flux decrement due to","authors_text":"A. De Cia, A. de Ugarte Postigo, A. J. Levan, B. Milvang-Jensen, C. Ledoux, D. Malesani, D. Xu, G. Tagliaferri, H. Flores, J. Datson, J. Hjorth, J.-K. Krogager, J. P. U. Fynbo, J. Sollerman, K. Mikkelsen, K. Wiersema, L. Kaper, M. Sparre, N. Aghanim, N. R. Tanvir, O. E. Hartoog, P. Goldoni, P. Jakobsson, P. M{\\o}ller, P. M. Vreeswijk, R. Salinas, S. Covino, S. D. Vergani, T. Goto, T. Kr\\\"uhler, V. D'Elia","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-09-16T21:05:32Z","title":"VLT/X-shooter spectroscopy of the afterglow of the Swift GRB 130606A: Chemical abundances and reionisation at $z\\sim6$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.4804","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":"sha256:4a342e5dac676f56fbb49881b535167672153854ad9fad6825d04d1b66f5a6b9","target":"record","created_at":"2026-05-18T01:34:50Z","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":"c831d8f66d95e0025dd5b224ab18bc61211c06eadb66ed97b19148e4206ed58b","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-09-16T21:05:32Z","title_canon_sha256":"a3323dc9ed32aa7eb6d9fd998fc561c31ccd720ca4b4aa05d965bd2238dd5980"},"schema_version":"1.0","source":{"id":"1409.4804","kind":"arxiv","version":2}},"canonical_sha256":"52af8e7a4111cbf2c459f0819fd3886f0d75a7adef2c0c3f5383ccc9e7e73700","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52af8e7a4111cbf2c459f0819fd3886f0d75a7adef2c0c3f5383ccc9e7e73700","first_computed_at":"2026-05-18T01:34:50.891524Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:34:50.891524Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gr2k4Sa/VQMKyEvqAM4qTY3tvPgVXLGHTM0z38oFm1RwRpmnxuANuugwHA34bE2BKownM0mt4aaAS93O4xDDAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:34:50.892061Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.4804","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a342e5dac676f56fbb49881b535167672153854ad9fad6825d04d1b66f5a6b9","sha256:36aeb54f3146ef055547864b2c317ed4eed476d26442a8d8342760c13ad64791"],"state_sha256":"1760cd2276fd6f69076e87a286fee63773b4c0241d0b8853c85b3aa376bb8275"}