{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:IXM67NHBVOHBW5FP55CLEBWDEJ","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":"c0238abef74de5a3490436417e8e6dd237030de6c7d0759fb8c3916559127a43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:02Z","title_canon_sha256":"6a6495e4a001d0940cc416f4d874a62bf7c3eb8d208fc711916ea5636535911e"},"schema_version":"1.0","source":{"id":"1210.2393","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2393","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2393v2","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2393","created_at":"2026-05-18T01:54:04Z"},{"alias_kind":"pith_short_12","alias_value":"IXM67NHBVOHB","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"IXM67NHBVOHBW5FP","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"IXM67NHB","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:ec6e6c7b7630df3129fe423e13168269d639767889596c66d2c2d6197cf82fb7","target":"graph","created_at":"2026-05-18T01:54:04Z","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 contribution of star-forming galaxies to the ionizing background at z~3, building on previous work based on narrowband (NB3640) imaging in the SSA22a field. We use new Keck/LRIS spectra of Lyman break galaxies (LBGs) and narrowband-selected Lya emitters (LAEs) to measure redshifts for 16 LBGs and 87 LAEs at z>3.055, such that our NB3640 imaging probes the Lyman-continuum (LyC) region. When we include the existing set of spectroscopically-confirmed LBGs, our total sample with z>3.055 consists of 41 LBGs and 91 LAEs, of which nine LBGs and 20 LAEs are detected in our NB3640 im","authors_text":"Alice E. Shapley, Brian Siana, Charles C. Steidel, Daniel B. Nestor, Katherine A. Kornei","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:02Z","title":"A Refined Estimate of the Ionizing Emissivity from Galaxies at z~3: Spectroscopic Follow-up in the SSA22a Field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2393","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":"sha256:379316ae7f5d643ec572f0e67af46d3af8aca76dce486f6a49b4de25a0158de3","target":"record","created_at":"2026-05-18T01:54:04Z","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":"c0238abef74de5a3490436417e8e6dd237030de6c7d0759fb8c3916559127a43","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-10-08T20:00:02Z","title_canon_sha256":"6a6495e4a001d0940cc416f4d874a62bf7c3eb8d208fc711916ea5636535911e"},"schema_version":"1.0","source":{"id":"1210.2393","kind":"arxiv","version":2}},"canonical_sha256":"45d9efb4e1ab8e1b74afef44b206c3226c19a69f320cd5aacb71adcd9f4ab12d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"45d9efb4e1ab8e1b74afef44b206c3226c19a69f320cd5aacb71adcd9f4ab12d","first_computed_at":"2026-05-18T01:54:04.426772Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:54:04.426772Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KR3FZ5xIfmwejd/DJ1erlj1FaijZkEYl+xRkQxs8vALGlWPcVhycY/bEJevDh38Rs+iIVqq83/wjWRzOWgR1AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:54:04.427193Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2393","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:379316ae7f5d643ec572f0e67af46d3af8aca76dce486f6a49b4de25a0158de3","sha256:ec6e6c7b7630df3129fe423e13168269d639767889596c66d2c2d6197cf82fb7"],"state_sha256":"bcb2be5dc95bf9adda6197640a9e66fe56beb41feece02de4c9e2b88368bedb0"}