{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:7BY66VCHBX4OEUQPWAQ4KTHUQZ","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":"4e7706cac07a34aac44598026f99bb3856b3a8ac932280da7cf06250c643611e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-11T19:12:38Z","title_canon_sha256":"1176ee69e45239664e28fab4a5176f5365c2bf4a216bcc4f3730168816e52834"},"schema_version":"1.0","source":{"id":"0905.1674","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.1674","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"arxiv_version","alias_value":"0905.1674v1","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1674","created_at":"2026-05-18T04:29:43Z"},{"alias_kind":"pith_short_12","alias_value":"7BY66VCHBX4O","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"7BY66VCHBX4OEUQP","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"7BY66VCH","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:f8dcb12b05e764d04b46439d29ab35c01f8bfcb41ba88426e1b750a01c8ba4d3","target":"graph","created_at":"2026-05-18T04:29:43Z","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 present first results of a study aimed to constrain the star formation rate and dust content of galaxies at z~2. We use a sample of BzK-selected star-forming galaxies, drawn from the COSMOS survey, to perform a stacking analysis of their 1.4 GHz radio continuum as a function of different stellar population properties, after removing AGN contaminants from the sample. Dust unbiased star formation rates are derived from radio fluxes assuming the local radio-IR correlation. The main results of this work are: i) specific star formation rates are constant over about 1 dex in stellar mass and up t","authors_text":"A.M. Koekemoer (STScI), A. Renzini (INAF-Padova), C.J. Willott (NRC-HIA), C.L. Carilli (NRAO), D. Thompson (LBTO/UofA), E. Daddi (CEA), E. Schinnerer (MPIA), F. Civano (CfA), F.N. Owen (NRAO), H. Aussel (CEA), H.J. Mc Cracken (IAP), J.P. Kneib (LAM), M. Pannella (NRAO), M. Salvato (CIT), N. Scoville (CIT), O. Ilbert (IfA/LAM), V. Smolcic (CIT), V. Strazzullo (NRAO), Y. Mellier (IAP), Y. Taniguchi (GSSE)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-11T19:12:38Z","title":"Star formation and dust obscuration at z~2: galaxies at the dawn of downsizing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1674","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":"sha256:8811fc8e0eb8d94832f4e9f33d09ed3d0be7e7d6b9fc2879c7535ba573f01da9","target":"record","created_at":"2026-05-18T04:29:43Z","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":"4e7706cac07a34aac44598026f99bb3856b3a8ac932280da7cf06250c643611e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-05-11T19:12:38Z","title_canon_sha256":"1176ee69e45239664e28fab4a5176f5365c2bf4a216bcc4f3730168816e52834"},"schema_version":"1.0","source":{"id":"0905.1674","kind":"arxiv","version":1}},"canonical_sha256":"f871ef54470df8e2520fb021c54cf4866dab4a5c1759198b77b213ae0617b8bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f871ef54470df8e2520fb021c54cf4866dab4a5c1759198b77b213ae0617b8bb","first_computed_at":"2026-05-18T04:29:43.078017Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:29:43.078017Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uQI/veoL6PwRJXChFWxWGCLjBCroAB/gcFqLjqe9Y1KV66rBI8pUDYlQg3fN6HBAufnmRIJFij2W/mek9lIODQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:29:43.078493Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.1674","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8811fc8e0eb8d94832f4e9f33d09ed3d0be7e7d6b9fc2879c7535ba573f01da9","sha256:f8dcb12b05e764d04b46439d29ab35c01f8bfcb41ba88426e1b750a01c8ba4d3"],"state_sha256":"a336c8016391e221b200c0223c59e04f7129d1b593d739da1b600bad3ed14a91"}