{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:IEX6GR6H25AX26WXNA7DS7EAKV","short_pith_number":"pith:IEX6GR6H","schema_version":"1.0","canonical_sha256":"412fe347c7d7417d7ad7683e397c80554e02a94f230b654a0d175ebb9c6bad8e","source":{"kind":"arxiv","id":"0801.1184","version":1},"attestation_state":"computed","paper":{"title":"GMASS Ultradeep Spectroscopy of Galaxies at 1.4<z<2. II. Superdense passive galaxies: how did they form and evolve ?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Cimatti (Universita` di Bologna - Dipartimento di Astronomia), A. Franceschini (Universita` di Padova - Dipartimento di Astronomia), A. Renzini (INAF - OAPD), C. Halliday (INAF - OAA), E. Daddi (CEA Saclay), G. Rodighiero (Universita` di Padova - Dipartimento di Astronomia), G. Zamorani (INAF - OABO), J. Kurk (MPIA Heidelberg), L. Pozzetti (INAF - OABO), M. Bolzonella (INAF - OABO), M. Brusa (MPE Garching), M. Dickinson (NOAO), M. Mignoli (INAF - OABO), P. Cassata (LAM), P. Rosati (ESO), S. Berta (MPE Garching)","submitted_at":"2008-01-08T08:37:07Z","abstract_excerpt":"We combine ultradeep optical spectroscopy from the GMASS project (\"Galaxy Mass Assembly ultradeep Spectroscopic Survey\") with GOODS multi-band photometry and HST imaging to study a sample of passive galaxiesat 1.39<z<1.99 selected at 4.5 microns. A stacked spectrum with an equivalent integration time of ~500 hours was obtained is publicly released. The spectral and photometric SED properties indicate very weak or absent star formation, moderately old stellar ages of ~1 Gyr (for solar metallicity) and stellar masses in the range of 10^{10-11} solar masses, thus implying that the major star form"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0801.1184","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2008-01-08T08:37:07Z","cross_cats_sorted":[],"title_canon_sha256":"526df3b81b47db17e1e7831552fdd15afb465b47e5fee3106a687da88e5e3333","abstract_canon_sha256":"b5448ee8a7b390a7abccc5289fd6c740247a3d9b4af2bd8aca43d6dc971d97b9"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:10.851478Z","signature_b64":"qHA2AuPFV7R6CWBOeb6AQb5E3v4CLSxxrBae8EWQWfgVN12a3fwIUV5YS57Ze8+G2lSnTB1yFob5CReYiOPODw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"412fe347c7d7417d7ad7683e397c80554e02a94f230b654a0d175ebb9c6bad8e","last_reissued_at":"2026-05-18T04:23:10.851052Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:10.851052Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"GMASS Ultradeep Spectroscopy of Galaxies at 1.4<z<2. II. Superdense passive galaxies: how did they form and evolve ?","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. Cimatti (Universita` di Bologna - Dipartimento di Astronomia), A. Franceschini (Universita` di Padova - Dipartimento di Astronomia), A. Renzini (INAF - OAPD), C. Halliday (INAF - OAA), E. Daddi (CEA Saclay), G. Rodighiero (Universita` di Padova - Dipartimento di Astronomia), G. Zamorani (INAF - OABO), J. Kurk (MPIA Heidelberg), L. Pozzetti (INAF - OABO), M. Bolzonella (INAF - OABO), M. Brusa (MPE Garching), M. Dickinson (NOAO), M. Mignoli (INAF - OABO), P. Cassata (LAM), P. Rosati (ESO), S. Berta (MPE Garching)","submitted_at":"2008-01-08T08:37:07Z","abstract_excerpt":"We combine ultradeep optical spectroscopy from the GMASS project (\"Galaxy Mass Assembly ultradeep Spectroscopic Survey\") with GOODS multi-band photometry and HST imaging to study a sample of passive galaxiesat 1.39<z<1.99 selected at 4.5 microns. A stacked spectrum with an equivalent integration time of ~500 hours was obtained is publicly released. The spectral and photometric SED properties indicate very weak or absent star formation, moderately old stellar ages of ~1 Gyr (for solar metallicity) and stellar masses in the range of 10^{10-11} solar masses, thus implying that the major star form"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.1184","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0801.1184","created_at":"2026-05-18T04:23:10.851117+00:00"},{"alias_kind":"arxiv_version","alias_value":"0801.1184v1","created_at":"2026-05-18T04:23:10.851117+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.1184","created_at":"2026-05-18T04:23:10.851117+00:00"},{"alias_kind":"pith_short_12","alias_value":"IEX6GR6H25AX","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_16","alias_value":"IEX6GR6H25AX26WX","created_at":"2026-05-18T12:25:57.157939+00:00"},{"alias_kind":"pith_short_8","alias_value":"IEX6GR6H","created_at":"2026-05-18T12:25:57.157939+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV","json":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV.json","graph_json":"https://pith.science/api/pith-number/IEX6GR6H25AX26WXNA7DS7EAKV/graph.json","events_json":"https://pith.science/api/pith-number/IEX6GR6H25AX26WXNA7DS7EAKV/events.json","paper":"https://pith.science/paper/IEX6GR6H"},"agent_actions":{"view_html":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV","download_json":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV.json","view_paper":"https://pith.science/paper/IEX6GR6H","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0801.1184&json=true","fetch_graph":"https://pith.science/api/pith-number/IEX6GR6H25AX26WXNA7DS7EAKV/graph.json","fetch_events":"https://pith.science/api/pith-number/IEX6GR6H25AX26WXNA7DS7EAKV/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV/action/storage_attestation","attest_author":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV/action/author_attestation","sign_citation":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV/action/citation_signature","submit_replication":"https://pith.science/pith/IEX6GR6H25AX26WXNA7DS7EAKV/action/replication_record"}},"created_at":"2026-05-18T04:23:10.851117+00:00","updated_at":"2026-05-18T04:23:10.851117+00:00"}