{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:MBXDFHWUCT6THA5QL73SD57VFB","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":"d23b8d2e557987f511209ac1451211d531f2082c8ba7fdd2dfd7a3271091526e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-10T20:07:47Z","title_canon_sha256":"66b04e7836b49d169b96784873f05b41168cf0a85362a0f675bf4d16dc92b630"},"schema_version":"1.0","source":{"id":"1306.2338","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.2338","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"arxiv_version","alias_value":"1306.2338v1","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.2338","created_at":"2026-05-18T01:49:24Z"},{"alias_kind":"pith_short_12","alias_value":"MBXDFHWUCT6T","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"MBXDFHWUCT6THA5Q","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"MBXDFHWU","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:89a0d59ef76c148db2ea7afdceea5f51e906aec75a726fad95a781565248f521","target":"graph","created_at":"2026-05-18T01:49:24Z","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 use deep integral field spectroscopy data from the CALIFA survey to study the warm interstellar medium (WIM) of 32 nearby early-type galaxies (ETGs). We propose a tentative subdivision of our sample ETGs into two groups, according to their Ha equivalent width (EW) and Lyman continuum (LyC) photon escape fraction (PLF). Type i ETGs show nearly constant EWs and a PLF~0, suggesting that photoionization by post-AGB stars is the main driver of their faint extranuclear nebular emission. Type ii ETGs are characterized by very low, outwardly increasing EWs, and a PLF as large as ~0.9 in their cente","authors_text":"A. Del Olmo, A. de Lorenzo-Caceres, A. Monreal-Ibero, A.R. Lopez-Sanchez, B. Husemann, B. Ziegler, C. Coritjo, C. Kehrig, D. Mast, G. van de Ven, I. Marquez, J. Bland-Hawthorn, J. Falcon-Barroso, J. Iglesias-Paramo, J.M. Gomes, J.M. Vilchez, L. Galbany, L. Wisotzki, M.D. Lehnert, M. Molla, P. Papaderos, R. Garcia-Benito, S.F. Sanchez, the CALIFA collaboration","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-10T20:07:47Z","title":"Nebular emission and the Lyman continuum photon escape fraction in CALIFA early-type galaxies"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.2338","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:e9ddb3225718b9fea201d13d09ba13a13e5701fd73656508d0e48fdbfd12b888","target":"record","created_at":"2026-05-18T01:49:24Z","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":"d23b8d2e557987f511209ac1451211d531f2082c8ba7fdd2dfd7a3271091526e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-10T20:07:47Z","title_canon_sha256":"66b04e7836b49d169b96784873f05b41168cf0a85362a0f675bf4d16dc92b630"},"schema_version":"1.0","source":{"id":"1306.2338","kind":"arxiv","version":1}},"canonical_sha256":"606e329ed414fd3383b05ff721f7f52863de8dd3da7fdef18213215541e95b4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"606e329ed414fd3383b05ff721f7f52863de8dd3da7fdef18213215541e95b4d","first_computed_at":"2026-05-18T01:49:24.014021Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:24.014021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7tRDT6mu0HT2vTDOTmADv/UlvB5E//oub5tWXyWcQmsxiQ/hadtm85r6oELnefre3jo7C3W5PhOti7WTA9aaDg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:24.014662Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.2338","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9ddb3225718b9fea201d13d09ba13a13e5701fd73656508d0e48fdbfd12b888","sha256:89a0d59ef76c148db2ea7afdceea5f51e906aec75a726fad95a781565248f521"],"state_sha256":"2f74af4ed831abaa67f59e3b67e1e972185042a776cd6e5dc6a5ef58cf0d7ef9"}