{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:LKDSJBS3ZCKSAPQQJMDXZ4DVAA","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":"cfef5eeade56281b1a5558b5c980101afcfba3122f83d3f5e983296386e4949d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-18T21:00:00Z","title_canon_sha256":"76770ccc4116daee7b34bd2c67b4ed1253edda962e770f62193e4c8ae521825b"},"schema_version":"1.0","source":{"id":"1212.4492","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.4492","created_at":"2026-05-18T01:52:30Z"},{"alias_kind":"arxiv_version","alias_value":"1212.4492v1","created_at":"2026-05-18T01:52:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.4492","created_at":"2026-05-18T01:52:30Z"},{"alias_kind":"pith_short_12","alias_value":"LKDSJBS3ZCKS","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"LKDSJBS3ZCKSAPQQ","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"LKDSJBS3","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:013136f8054ce99c1d26cc2cb15f1748875826479c40124ff9ec3e2e5284e74b","target":"graph","created_at":"2026-05-18T01:52:30Z","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":"Soft X-ray absorption in excess of Galactic is observed in the afterglows of most gamma-ray bursts (GRBs), but the correct solution to its origin has not been arrived at after more than a decade of work, preventing its use as a powerful diagnostic tool. We resolve this long-standing problem and find that He in the GRB's host HII region is responsible for most of the absorption. We show that the X-ray absorbing column density (N_Hx) is correlated with both the neutral gas column density and with the optical afterglow extinction (Av). This correlation explains the connection between dark bursts ","authors_text":"(2) LAM-CNRS, (3) IAA-CSIC, (4) U. Iceland, 5), (5) OKC, Anja C. Andersen (1), Daniele Malesani (1) ((1) DARK, Darach Watson (1), Giorgos Leloudas (1, Javier Gorosabel (3), Jens Hjorth (1), Johan P. U. Fynbo (1), P\\'all Jakobsson (4), Peter Laursen (1), Tayyaba Zafar (2), Thomas Kr\\\"uhler (1), U. Copenhagen, U. Stockholm)","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-18T21:00:00Z","title":"Helium in natal HII regions: the origin of the X-ray absorption in gamma-ray burst afterglows"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.4492","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:ca964422fea9e50076f38c644a41ad38baeda5c9214ff9063e6b8fc8bc9398e4","target":"record","created_at":"2026-05-18T01:52:30Z","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":"cfef5eeade56281b1a5558b5c980101afcfba3122f83d3f5e983296386e4949d","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-12-18T21:00:00Z","title_canon_sha256":"76770ccc4116daee7b34bd2c67b4ed1253edda962e770f62193e4c8ae521825b"},"schema_version":"1.0","source":{"id":"1212.4492","kind":"arxiv","version":1}},"canonical_sha256":"5a8724865bc895203e104b077cf0750033c30df9c7a98b93f74d5a45e632d515","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5a8724865bc895203e104b077cf0750033c30df9c7a98b93f74d5a45e632d515","first_computed_at":"2026-05-18T01:52:30.797921Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:30.797921Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QWqOYVSWoVKvhRWuY/X9IHY1fni+SmmsKSR8knIfmmsFWv8wlzkKkSBJrNVMIo+8QyMdieoqMw7M6xm3GBZ1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:30.798574Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.4492","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ca964422fea9e50076f38c644a41ad38baeda5c9214ff9063e6b8fc8bc9398e4","sha256:013136f8054ce99c1d26cc2cb15f1748875826479c40124ff9ec3e2e5284e74b"],"state_sha256":"1b43bb7116752da6063e9d966b49162324339f6fd3b0d11ecd0836f92619e032"}