{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MZ7WCQLZLVCINQHGQOSEUXLF6Q","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":"9734df10f1af5fc766830b45a2e2fd1e339b5f31c5c295a019a6d9a308bbf1fa","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-24T20:00:46Z","title_canon_sha256":"d34682ff482236523c7b5be305d07d19e5d8acf7bf8e506256a693acf7cf0235"},"schema_version":"1.0","source":{"id":"1506.07525","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.07525","created_at":"2026-05-18T01:19:02Z"},{"alias_kind":"arxiv_version","alias_value":"1506.07525v1","created_at":"2026-05-18T01:19:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.07525","created_at":"2026-05-18T01:19:02Z"},{"alias_kind":"pith_short_12","alias_value":"MZ7WCQLZLVCI","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MZ7WCQLZLVCINQHG","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MZ7WCQLZ","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:865a8200362301b5564e2f7863efa30f2f410705bf565913f1fe1714946bef61","target":"graph","created_at":"2026-05-18T01:19:02Z","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 ISM properties of 13 star-forming galaxies within the z~2 COSMOS cluster. We show that the cluster members have [NII]/Ha and [OIII]/Hb emission-line ratios similar to z~2 field galaxies, yet systematically different emission-line ratios (by ~0.17 dex) from the majority of local star-forming galaxies. We find no statistically significant difference in the [NII]/Ha and [OIII]/Hb line ratios or ISM pressures among the z~2 cluster galaxies and field galaxies at the same redshift. We show that our cluster galaxies have significantly larger ionization parameters (by up to an order","authors_text":"Adam Tomczak, Caroline Straatman, Glenn G. Kacprzak, Ivo Labbe, Karl Glazebrook, Kim-Vy H. Tran, Lee Spitler, Lisa J. Kewley, Michael Cowley, Michael Dopita, Themiya Nanayakkara, Tiantian Yuan","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-24T20:00:46Z","title":"Z-FIRE: ISM properties of the z = 2.095 COSMOS Cluster"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.07525","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":"sha256:2ab2d916af978ade962769995f07ea16266f7633faadd15a70558f30bef88d17","target":"record","created_at":"2026-05-18T01:19:02Z","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":"9734df10f1af5fc766830b45a2e2fd1e339b5f31c5c295a019a6d9a308bbf1fa","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-06-24T20:00:46Z","title_canon_sha256":"d34682ff482236523c7b5be305d07d19e5d8acf7bf8e506256a693acf7cf0235"},"schema_version":"1.0","source":{"id":"1506.07525","kind":"arxiv","version":1}},"canonical_sha256":"667f6141795d4486c0e683a44a5d65f40613e47f370abd5821d94a2a18731e14","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"667f6141795d4486c0e683a44a5d65f40613e47f370abd5821d94a2a18731e14","first_computed_at":"2026-05-18T01:19:02.179199Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:02.179199Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZdJ1m96QXE1+5cnJdJjCiSjHyxA1eCVbYZnf6AIhWHGoxLVfNgddG0aKbL7Vc3BfSO9FYNa3xTWYMeVF8X59CQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:02.179887Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.07525","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ab2d916af978ade962769995f07ea16266f7633faadd15a70558f30bef88d17","sha256:865a8200362301b5564e2f7863efa30f2f410705bf565913f1fe1714946bef61"],"state_sha256":"de3a03eda8365fcc276c11f347ba1d2805dbf90b747b73ab49fdbf9d38944c30"}