{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GVZMVANM7YGANEBL6SE55PLED5","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":"e2f4dc8eb29af39c4635aa303a0de8ae43633b751bd2bc43039c2454607135c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-15T17:55:01Z","title_canon_sha256":"376817356c03ff9057d3a542b30bdcb8b9524922b3aa1ca51368b175df4d0a60"},"schema_version":"1.0","source":{"id":"1806.06065","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.06065","created_at":"2026-05-18T00:03:46Z"},{"alias_kind":"arxiv_version","alias_value":"1806.06065v1","created_at":"2026-05-18T00:03:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.06065","created_at":"2026-05-18T00:03:46Z"},{"alias_kind":"pith_short_12","alias_value":"GVZMVANM7YGA","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GVZMVANM7YGANEBL","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GVZMVANM","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:51916e6b7ecb2be148a80e8480e5a716e425c220f356eb304ddbbf676ee02728","target":"graph","created_at":"2026-05-18T00:03:46Z","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 21-cm Spectral Line Observations of Neutral Gas with the VLA (21-SPONGE), a Karl G. Jansky Very Large Array (VLA) large project (~600 hours) for measuring the physical properties of Galactic neutral hydrogen (HI). 21-SPONGE is distinguished among previous Galactic HI studies as a result of: (1) exceptional optical depth sensitivity ($\\sigma_{\\tau} < 10^{-3}$ per $0.42\\rm\\,km\\,s^{-1}$ channels over 57 lines of sight); (2) matching 21 cm emission spectra with highest-possible angular resolution (~4') from the Arecibo Observatory; (3) detailed comparisons with numerical simulations for","authors_text":"Brian Babler, Carl Heiles, Chang-Goo Kim, Claire E. Murray, John M. Dickey, Snezana Stanimirovic, W. M. Goss","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-15T17:55:01Z","title":"The 21-SPONGE HI Absorption Line Survey II: The temperature of Galactic HI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.06065","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":"sha256:628ab633a8e31f92dc4fef2917e5385f6ec793cd3dab1c83ae5dc9031cbfae0c","target":"record","created_at":"2026-05-18T00:03:46Z","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":"e2f4dc8eb29af39c4635aa303a0de8ae43633b751bd2bc43039c2454607135c2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-06-15T17:55:01Z","title_canon_sha256":"376817356c03ff9057d3a542b30bdcb8b9524922b3aa1ca51368b175df4d0a60"},"schema_version":"1.0","source":{"id":"1806.06065","kind":"arxiv","version":1}},"canonical_sha256":"3572ca81acfe0c06902bf489debd641f55cc8bd25bf858e69a8a82ab93a847d1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3572ca81acfe0c06902bf489debd641f55cc8bd25bf858e69a8a82ab93a847d1","first_computed_at":"2026-05-18T00:03:46.609470Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:03:46.609470Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ki9ta1bCs5dAxBXHDOEs7MYAZIQWPF8nCOhXSAonrIMikmGw9Mwpw9jxIq66BiUvdr4T1OXQhcdB0c8it+BbCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:03:46.610062Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.06065","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:628ab633a8e31f92dc4fef2917e5385f6ec793cd3dab1c83ae5dc9031cbfae0c","sha256:51916e6b7ecb2be148a80e8480e5a716e425c220f356eb304ddbbf676ee02728"],"state_sha256":"f747cc743d75710e7f14683b9bfcf628f3b8e996edc211f6248515c7080f9f19"}