{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IL6NZZZSR7PMFNLYD6WOPZY26C","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":"717c8e48f56a0433d19e194f7bbd135346b22b6c0ecd0afaa1d1e30413ab6961","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-05T08:29:26Z","title_canon_sha256":"50a96ceb91161607a5ee68b39bbb6b0d6194c35451dd8d31fd13372780d6db3b"},"schema_version":"1.0","source":{"id":"1209.0891","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.0891","created_at":"2026-05-18T03:38:34Z"},{"alias_kind":"arxiv_version","alias_value":"1209.0891v1","created_at":"2026-05-18T03:38:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.0891","created_at":"2026-05-18T03:38:34Z"},{"alias_kind":"pith_short_12","alias_value":"IL6NZZZSR7PM","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IL6NZZZSR7PMFNLY","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IL6NZZZS","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:3439926a5c3b3b4e5bbae53d5572e95c11f94f6b4c1355512a9fa4e02a881c7f","target":"graph","created_at":"2026-05-18T03:38:34Z","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 extreme brightness of gamma-ray burst (GRB) afterglows and their simple spectral shape make them ideal beacons to study the interstellar medium of their host galaxies through absorption line spectroscopy. Using 69 low-resolution GRB afterglow spectra, we conduct a study of the rest-frame equivalent width (EW) distribution of features with an average rest-frame EW larger than 0.5 A. To compare an individual GRB with the sample, we develop EW diagrams as a graphical tool, and we give a catalogue with diagrams for the 69 spectra. We introduce a line strength parameter (LSP) that allows us to ","authors_text":"A. de Ugarte Postigo, B. Milvang-Jensen, C. C. Thoene, D. Malesani, G. Leloudas, J. Gorosabel, J. Hjorth, J. P. U. Fynbo, K. Wiersema, L. Christensen, P. Jakobsson, R. Sanchez-Ramirez, S. Schulze, T. Zafar","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-05T08:29:26Z","title":"The distribution of equivalent widths in long GRB afterglow spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.0891","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:ca8991a74b583673bfd7206563603aaf72e8d4a6c895c2a31e0d22c3f50519b9","target":"record","created_at":"2026-05-18T03:38:34Z","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":"717c8e48f56a0433d19e194f7bbd135346b22b6c0ecd0afaa1d1e30413ab6961","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-09-05T08:29:26Z","title_canon_sha256":"50a96ceb91161607a5ee68b39bbb6b0d6194c35451dd8d31fd13372780d6db3b"},"schema_version":"1.0","source":{"id":"1209.0891","kind":"arxiv","version":1}},"canonical_sha256":"42fcdce7328fdec2b5781face7e71af0beba5536326f6c358189c51a08e4c7fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"42fcdce7328fdec2b5781face7e71af0beba5536326f6c358189c51a08e4c7fd","first_computed_at":"2026-05-18T03:38:34.814278Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:34.814278Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MMfGKl6c3GC8M4lwFET4szsQQNEb1TUn0ijn40TJui0jcEeXBWxKc7uRPz7R5zzPOu+u/lSBZ87QRePxtif0BA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:34.814882Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.0891","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca8991a74b583673bfd7206563603aaf72e8d4a6c895c2a31e0d22c3f50519b9","sha256:3439926a5c3b3b4e5bbae53d5572e95c11f94f6b4c1355512a9fa4e02a881c7f"],"state_sha256":"532589676ea56e5b537695e6d972930f523cbdd102a3120aa99d708348f07f2d"}