{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:UFEHVOTVVDLKY2PCNQBPDMRBR7","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":"2899f0852b741d903370d3548314c393f045268579ee553f827859bde95746ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-14T18:00:06Z","title_canon_sha256":"c5ab6852f4eef46b23f1e1e3b92bcc25b5395d621e3c77e07e4ce5ded4a68e3c"},"schema_version":"1.0","source":{"id":"2009.06652","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06652","created_at":"2026-07-05T02:43:08Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06652v2","created_at":"2026-07-05T02:43:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06652","created_at":"2026-07-05T02:43:08Z"},{"alias_kind":"pith_short_12","alias_value":"UFEHVOTVVDLK","created_at":"2026-07-05T02:43:08Z"},{"alias_kind":"pith_short_16","alias_value":"UFEHVOTVVDLKY2PC","created_at":"2026-07-05T02:43:08Z"},{"alias_kind":"pith_short_8","alias_value":"UFEHVOTV","created_at":"2026-07-05T02:43:08Z"}],"graph_snapshots":[{"event_id":"sha256:ed29d2e0fb64263d1f2e9d135d907c47de290a6e92a2e76b3825c8c1e68c5fcd","target":"graph","created_at":"2026-07-05T02:43:08Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2009.06652/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The density and temperature properties of the intergalactic medium (IGM) reflect the heating and ionization history during cosmological structure formation, and are primarily probed by the Lyman-alpha forest of neutral hydrogen absorption features in the observed spectra of background sources (Gunn & Peterson 1965). We present the methodology and initial results from the Cholla IGM Photoheating Simulation (CHIPS) suite performed with the Graphics Process Unit-accelerated Cholla code to study the IGM at high, uniform spatial resolution maintained over large volumes. In this first paper, we exam","authors_text":"(2) University of Pittsburgh), Brant Robertson (1), Bruno Villasenor (1), Evan Schneider (2) ((1) University of California, Piero Madau (1), Santa Cruz","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-14T18:00:06Z","title":"Effects of Photoionization and Photoheating on Lyman-alpha Forest Properties from Cholla Cosmological Simulations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06652","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":"sha256:5c9eee042ab5911eaee970ae05f9ffb65ed36a0cce0e750f14a8abc633b27571","target":"record","created_at":"2026-07-05T02:43:08Z","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":"2899f0852b741d903370d3548314c393f045268579ee553f827859bde95746ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-09-14T18:00:06Z","title_canon_sha256":"c5ab6852f4eef46b23f1e1e3b92bcc25b5395d621e3c77e07e4ce5ded4a68e3c"},"schema_version":"1.0","source":{"id":"2009.06652","kind":"arxiv","version":2}},"canonical_sha256":"a1487aba75a8d6ac69e26c02f1b2218ffa1eccdb926bf428f5b27713f5f66ba5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1487aba75a8d6ac69e26c02f1b2218ffa1eccdb926bf428f5b27713f5f66ba5","first_computed_at":"2026-07-05T02:43:08.833926Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:43:08.833926Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"N6OPCYRWH4s81LlmV0FOKQ4q7OA8EPSyQxiafXaZFcYfWCCwdHZkPzkHeu++Bq8dKPzxCkbdlWVa8KJlvfTcCA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:43:08.834297Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.06652","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c9eee042ab5911eaee970ae05f9ffb65ed36a0cce0e750f14a8abc633b27571","sha256:ed29d2e0fb64263d1f2e9d135d907c47de290a6e92a2e76b3825c8c1e68c5fcd"],"state_sha256":"1ba8a7a2eade5b9746577f823754d4ae4b9ee79d39fe9448b5ca7c77b46e9396"}