{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:ICW22Z77S6NKB5CESJZXBJYSWG","short_pith_number":"pith:ICW22Z77","canonical_record":{"source":{"id":"2302.10213","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-20T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"be6f8ee208ea65896b3d93f300abc5c59141cf80b5c7aa2e677f91b5eab16d77","abstract_canon_sha256":"f1361684fe14e069afe01f6ce3ad5da4e84439257e9087785687c4ed7d13ded7"},"schema_version":"1.0"},"canonical_sha256":"40adad67ff979aa0f444927370a712b1814bb4cf624a885ac9f22d015897e5fa","source":{"kind":"arxiv","id":"2302.10213","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10213","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10213v1","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10213","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_12","alias_value":"ICW22Z77S6NK","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_16","alias_value":"ICW22Z77S6NKB5CE","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_8","alias_value":"ICW22Z77","created_at":"2026-07-05T06:29:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:ICW22Z77S6NKB5CESJZXBJYSWG","target":"record","payload":{"canonical_record":{"source":{"id":"2302.10213","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-20T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"be6f8ee208ea65896b3d93f300abc5c59141cf80b5c7aa2e677f91b5eab16d77","abstract_canon_sha256":"f1361684fe14e069afe01f6ce3ad5da4e84439257e9087785687c4ed7d13ded7"},"schema_version":"1.0"},"canonical_sha256":"40adad67ff979aa0f444927370a712b1814bb4cf624a885ac9f22d015897e5fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:29:41.351171Z","signature_b64":"BFcjXYPR0IMUB2ZCZ2Dp18mlG8RACPJ+dWyLSjAWgzjLZLVcJhCr1eQ/S7QY1MSuZdjoshHhgYu2MySvdBW2Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"40adad67ff979aa0f444927370a712b1814bb4cf624a885ac9f22d015897e5fa","last_reissued_at":"2026-07-05T06:29:41.350729Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:29:41.350729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2302.10213","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:29:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oxOpd8ZBiLsvyfCuwLZ4en/ptBVnctUrRZVOmWSD3m2GCxceL3FxMvtpu09LYrRIQMhHXzDU8G5UCbmvgqt6DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:06:13.223066Z"},"content_sha256":"44b306f6ea8f68733d263a234e31b0c989bc6e68b8b695dab35873d82c5d5a4e","schema_version":"1.0","event_id":"sha256:44b306f6ea8f68733d263a234e31b0c989bc6e68b8b695dab35873d82c5d5a4e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:ICW22Z77S6NKB5CESJZXBJYSWG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Impact of Star-Formation-Rate Surface Density on the Electron Density and Ionization Parameter of High-Redshift Galaxies","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Alice E. Shapley, Alison L. Coil, Bahram Mobasher, Brian Siana, Mariska Kriek, Michael W. Topping, Naveen A. Reddy, Ryan L. Sanders, Saeed Rezaee","submitted_at":"2023-02-20T19:00:04Z","abstract_excerpt":"We use the large spectroscopic dataset of the MOSFIRE Deep Evolution Field (MOSDEF) survey to investigate some of the key factors responsible for the elevated ionization parameters (U) inferred for high-redshift galaxies, focusing in particular on the role of star-formation-rate surface density (Sigma_SFR). Using a sample of 317 galaxies with spectroscopic redshifts z~1.9-3.7, we construct composite rest-frame optical spectra in bins of Sigma_SFR and infer electron densities, n_e, using the ratio of the [OII] 3727, 3730 doublet. Our analysis suggests a significant (~3 sigma) correlation betwee"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10213","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2302.10213/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T06:29:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Czf1+7bNsKuAhcSRdDJqPbGtnGuGUH4sZK0l3Lrew+03FOdSnTCoQ++0gmw1OAZdaeCJPvDNH0uquL5NcVLKDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T22:06:13.223590Z"},"content_sha256":"c38727492a842bb3d3ea02feaf85a64fbbffc762d0bb2b659e75eeb24789d000","schema_version":"1.0","event_id":"sha256:c38727492a842bb3d3ea02feaf85a64fbbffc762d0bb2b659e75eeb24789d000"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ICW22Z77S6NKB5CESJZXBJYSWG/bundle.json","state_url":"https://pith.science/pith/ICW22Z77S6NKB5CESJZXBJYSWG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ICW22Z77S6NKB5CESJZXBJYSWG/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T22:06:13Z","links":{"resolver":"https://pith.science/pith/ICW22Z77S6NKB5CESJZXBJYSWG","bundle":"https://pith.science/pith/ICW22Z77S6NKB5CESJZXBJYSWG/bundle.json","state":"https://pith.science/pith/ICW22Z77S6NKB5CESJZXBJYSWG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ICW22Z77S6NKB5CESJZXBJYSWG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:ICW22Z77S6NKB5CESJZXBJYSWG","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":"f1361684fe14e069afe01f6ce3ad5da4e84439257e9087785687c4ed7d13ded7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-20T19:00:04Z","title_canon_sha256":"be6f8ee208ea65896b3d93f300abc5c59141cf80b5c7aa2e677f91b5eab16d77"},"schema_version":"1.0","source":{"id":"2302.10213","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.10213","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"arxiv_version","alias_value":"2302.10213v1","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.10213","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_12","alias_value":"ICW22Z77S6NK","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_16","alias_value":"ICW22Z77S6NKB5CE","created_at":"2026-07-05T06:29:41Z"},{"alias_kind":"pith_short_8","alias_value":"ICW22Z77","created_at":"2026-07-05T06:29:41Z"}],"graph_snapshots":[{"event_id":"sha256:c38727492a842bb3d3ea02feaf85a64fbbffc762d0bb2b659e75eeb24789d000","target":"graph","created_at":"2026-07-05T06:29:41Z","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/2302.10213/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use the large spectroscopic dataset of the MOSFIRE Deep Evolution Field (MOSDEF) survey to investigate some of the key factors responsible for the elevated ionization parameters (U) inferred for high-redshift galaxies, focusing in particular on the role of star-formation-rate surface density (Sigma_SFR). Using a sample of 317 galaxies with spectroscopic redshifts z~1.9-3.7, we construct composite rest-frame optical spectra in bins of Sigma_SFR and infer electron densities, n_e, using the ratio of the [OII] 3727, 3730 doublet. Our analysis suggests a significant (~3 sigma) correlation betwee","authors_text":"Alice E. Shapley, Alison L. Coil, Bahram Mobasher, Brian Siana, Mariska Kriek, Michael W. Topping, Naveen A. Reddy, Ryan L. Sanders, Saeed Rezaee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-20T19:00:04Z","title":"The Impact of Star-Formation-Rate Surface Density on the Electron Density and Ionization Parameter of High-Redshift Galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.10213","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":"sha256:44b306f6ea8f68733d263a234e31b0c989bc6e68b8b695dab35873d82c5d5a4e","target":"record","created_at":"2026-07-05T06:29:41Z","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":"f1361684fe14e069afe01f6ce3ad5da4e84439257e9087785687c4ed7d13ded7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2023-02-20T19:00:04Z","title_canon_sha256":"be6f8ee208ea65896b3d93f300abc5c59141cf80b5c7aa2e677f91b5eab16d77"},"schema_version":"1.0","source":{"id":"2302.10213","kind":"arxiv","version":1}},"canonical_sha256":"40adad67ff979aa0f444927370a712b1814bb4cf624a885ac9f22d015897e5fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40adad67ff979aa0f444927370a712b1814bb4cf624a885ac9f22d015897e5fa","first_computed_at":"2026-07-05T06:29:41.350729Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:29:41.350729Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"BFcjXYPR0IMUB2ZCZ2Dp18mlG8RACPJ+dWyLSjAWgzjLZLVcJhCr1eQ/S7QY1MSuZdjoshHhgYu2MySvdBW2Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T06:29:41.351171Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.10213","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:44b306f6ea8f68733d263a234e31b0c989bc6e68b8b695dab35873d82c5d5a4e","sha256:c38727492a842bb3d3ea02feaf85a64fbbffc762d0bb2b659e75eeb24789d000"],"state_sha256":"bee9762193de5a4395bf3217c01e987247b855401cef099ea7554151ceb2f921"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IFk6Ln1hjx1HbbUp9rpBKUz7jG6L518svobqciaDhhnZzXkIwSuNFzXTs1umAt/XVk/XQrBp8cH8h+NJCfWEAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T22:06:13.229051Z","bundle_sha256":"8cecf7c9fa84949830f540b6f5ef817481d46fe8872bdfd7663be8ea0bc6fc7e"}}