{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:ALK6L3Y444DKX2ZKO3V4KSSBPX","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":"c6b56ebe2e2bec26acc4745be21f13ee24d1d90298dadaa793208bf1a738ae2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T20:07:55Z","title_canon_sha256":"dc0bcd6801493bd5c3fa6ef63789f36ba35724dbfdb7c0418b0efebfa8256402"},"schema_version":"1.0","source":{"id":"1706.07109","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.07109","created_at":"2026-05-18T00:36:31Z"},{"alias_kind":"arxiv_version","alias_value":"1706.07109v2","created_at":"2026-05-18T00:36:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.07109","created_at":"2026-05-18T00:36:31Z"},{"alias_kind":"pith_short_12","alias_value":"ALK6L3Y444DK","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_16","alias_value":"ALK6L3Y444DKX2ZK","created_at":"2026-05-18T12:31:05Z"},{"alias_kind":"pith_short_8","alias_value":"ALK6L3Y4","created_at":"2026-05-18T12:31:05Z"}],"graph_snapshots":[{"event_id":"sha256:a4cc575692c0d6aa0b70003495be17c3e305be785c97e3f01400e54da122dd01","target":"graph","created_at":"2026-05-18T00:36:31Z","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 investigate the relation between the optical extinction ($A_V$) and the hydrogen column density ($N_H$) determined from X-ray observations of a large sample of Galactic sightlines toward 35 supernova remnants, 6 planetary nebulae, and 70 X-ray binaries for which $N_H$ was determined in the literature with solar abundances. We derive an average ratio of ${N_H}/{A_V}=(2.08\\pm0.02)\\times10^{21}{\\rm H\\, cm^{-2}\\, mag^{-1}}$ for the whole Galaxy. We find no correlation between ${N_H}/{A_V}$ and the number density of hydrogen, the distance away from the Galactic centre, and the distance above or ","authors_text":"Aigen Li, Hui Zhu, Mengfei Zhang, Wenwu Tian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T20:07:55Z","title":"The gas-to-extinction ratio and the gas distribution in the Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.07109","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":"sha256:0cc7100e16f2edc5ca693e201b334a2d5ae9e6b4863065a875a12d3a710f5dba","target":"record","created_at":"2026-05-18T00:36:31Z","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":"c6b56ebe2e2bec26acc4745be21f13ee24d1d90298dadaa793208bf1a738ae2f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-21T20:07:55Z","title_canon_sha256":"dc0bcd6801493bd5c3fa6ef63789f36ba35724dbfdb7c0418b0efebfa8256402"},"schema_version":"1.0","source":{"id":"1706.07109","kind":"arxiv","version":2}},"canonical_sha256":"02d5e5ef1ce706abeb2a76ebc54a417dec6a2de532b86921c1783f8acaea0c59","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"02d5e5ef1ce706abeb2a76ebc54a417dec6a2de532b86921c1783f8acaea0c59","first_computed_at":"2026-05-18T00:36:31.129525Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:36:31.129525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lbfrTZCpNYTfFDTQKa5yDqdRVPU4aUki5LeJalvD4J6a1Q8dH+Zb8XuyPad1cg3M27T0NO0ojm3H4T34ABcsBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:36:31.130063Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.07109","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0cc7100e16f2edc5ca693e201b334a2d5ae9e6b4863065a875a12d3a710f5dba","sha256:a4cc575692c0d6aa0b70003495be17c3e305be785c97e3f01400e54da122dd01"],"state_sha256":"dfde7a4974b980416d4e123b33bd6100144752e08674e6b691d2df5a85863b8f"}