{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:RZ2URFER23V72ODQI74T63FBZQ","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":"80b8a4f2040ecb030ee8fb26989cf49a1371df9692c2c6fba15c8204bb4a2ef4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-19T17:58:16Z","title_canon_sha256":"0fa93cf255d0be3d56732ef6c461d96591e13e3e0469d4efb602297c9e01e8bd"},"schema_version":"1.0","source":{"id":"1004.3261","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.3261","created_at":"2026-05-18T04:36:50Z"},{"alias_kind":"arxiv_version","alias_value":"1004.3261v2","created_at":"2026-05-18T04:36:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.3261","created_at":"2026-05-18T04:36:50Z"},{"alias_kind":"pith_short_12","alias_value":"RZ2URFER23V7","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"RZ2URFER23V72ODQ","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"RZ2URFER","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:ae7e4d3b3ddf1eba03de015c48c8032cb17997fb77e23b9b934478d94a248b78","target":"graph","created_at":"2026-05-18T04:36:50Z","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":"We present VLT/FORS2 spectroscopy and GROND optical/near-IR photometry of the afterglow of the bright Fermi/LAT GRB 090926A. The spectrum shows prominent Lyman-alpha absorption with N_HI = 10^(21.73 +/- 0.07) cm^-2 and a multitude of metal lines at a common redshift of z=2.1062 +/- 0.0004, which we associate with the redshift of the GRB. The metallicity derived from SII is log(Z/Z_sun) ~ -1.9, one of the lowest values ever found in a GRB Damped Lyman-alpha (DLA) system. This confirms that the spread of metallicity in GRB-DLAs at z~2 is at least two orders of magnitude. We argue that this sprea","authors_text":"2), (2) TUM, (3) TLS Tautenburg, 4), (4) University College Dublin, (5) Clemson University), Arne Rau (1), A. Rossi (3), A. Updike (5) ((1) MPE Garching, F. Olivares E. (1), J. Greiner (1), P. Afonso (1), P. Schady (1), R. Filgas (1), S. Klose (3), S. McBreen (1, S. Savaglio (1), T. Kr\\\"uhler (1","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-19T17:58:16Z","title":"A very metal poor Damped Lyman-alpha system revealed through the most energetic GRB 090926A"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.3261","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":"sha256:0328ea1de247dad45579a13b90c120884effc35412dbfe5e1518d3ef17770567","target":"record","created_at":"2026-05-18T04:36:50Z","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":"80b8a4f2040ecb030ee8fb26989cf49a1371df9692c2c6fba15c8204bb4a2ef4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-04-19T17:58:16Z","title_canon_sha256":"0fa93cf255d0be3d56732ef6c461d96591e13e3e0469d4efb602297c9e01e8bd"},"schema_version":"1.0","source":{"id":"1004.3261","kind":"arxiv","version":2}},"canonical_sha256":"8e75489491d6ebfd387047f93f6ca1cc1907116200045d37021c5db158cd6cbe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8e75489491d6ebfd387047f93f6ca1cc1907116200045d37021c5db158cd6cbe","first_computed_at":"2026-05-18T04:36:50.219689Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:36:50.219689Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Tbq/eFrbvWyj8JzCQwd95z7Sfo4S3P3xK8Zp8dBhl8p42k33WCtKQGyJQuFHrMPdP0+Bm84ogl7X928MxzkyAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:36:50.220156Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.3261","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0328ea1de247dad45579a13b90c120884effc35412dbfe5e1518d3ef17770567","sha256:ae7e4d3b3ddf1eba03de015c48c8032cb17997fb77e23b9b934478d94a248b78"],"state_sha256":"41a70e451a4b96cd9068bc5e4a32e371d1896807b76ef0c3212bcd4ff98fa465"}