{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1997:2FXAYJA7654KPPNNF2S3HVMDMR","short_pith_number":"pith:2FXAYJA7","schema_version":"1.0","canonical_sha256":"d16e0c241ff778a7bdad2ea5b3d583647b851f85df9b9a7d772a5026dc026eaa","source":{"kind":"arxiv","id":"astro-ph/9703035","version":1},"attestation_state":"computed","paper":{"title":"Properties of High Redshift Cluster Ellipticals","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Mark Dickinson (STScI)","submitted_at":"1997-03-06T07:59:01Z","abstract_excerpt":"Cluster ellipticals are often thought to be among the oldest galaxies in the universe, with the bulk of their stellar mass formed at early cosmic epochs. I review recent observations of color evolution in early-type cluster galaxies at high redshift, which show remarkably little change in the color-magnitude relation out to z = 1. Spectra of elliptical galaxies from 1.15 < z < 1.41 demonstrate the presence of a dominant old stellar population even at these large lookback times, although there is some evidence for a tail of later star formation. The Kormendy relation, a photometric/morphologica"},"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":"astro-ph/9703035","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1997-03-06T07:59:01Z","cross_cats_sorted":[],"title_canon_sha256":"7ebabeaab1dc8a540edcbb78c9ab255e733a466539166a0881e65b433e1544d6","abstract_canon_sha256":"a3bafe70cc3cd582b006dffe9a714c12c0794b4b93c93b3bb62669f0591c9987"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:07:38.619696Z","signature_b64":"b2KB+CSQzK0ceDaba9+yPyct/TUkRaBvyQHUIyQNS706KzkwgRx7xfK3LOho9vX1ClnOoR1SbWCo5fV2SNg4Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d16e0c241ff778a7bdad2ea5b3d583647b851f85df9b9a7d772a5026dc026eaa","last_reissued_at":"2026-05-18T01:07:38.619033Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:07:38.619033Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Properties of High Redshift Cluster Ellipticals","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Mark Dickinson (STScI)","submitted_at":"1997-03-06T07:59:01Z","abstract_excerpt":"Cluster ellipticals are often thought to be among the oldest galaxies in the universe, with the bulk of their stellar mass formed at early cosmic epochs. I review recent observations of color evolution in early-type cluster galaxies at high redshift, which show remarkably little change in the color-magnitude relation out to z = 1. Spectra of elliptical galaxies from 1.15 < z < 1.41 demonstrate the presence of a dominant old stellar population even at these large lookback times, although there is some evidence for a tail of later star formation. The Kormendy relation, a photometric/morphologica"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9703035","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":"astro-ph/9703035","created_at":"2026-05-18T01:07:38.619140+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9703035v1","created_at":"2026-05-18T01:07:38.619140+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9703035","created_at":"2026-05-18T01:07:38.619140+00:00"},{"alias_kind":"pith_short_12","alias_value":"2FXAYJA7654K","created_at":"2026-05-18T12:25:48.327863+00:00"},{"alias_kind":"pith_short_16","alias_value":"2FXAYJA7654KPPNN","created_at":"2026-05-18T12:25:48.327863+00:00"},{"alias_kind":"pith_short_8","alias_value":"2FXAYJA7","created_at":"2026-05-18T12:25:48.327863+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/2FXAYJA7654KPPNNF2S3HVMDMR","json":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR.json","graph_json":"https://pith.science/api/pith-number/2FXAYJA7654KPPNNF2S3HVMDMR/graph.json","events_json":"https://pith.science/api/pith-number/2FXAYJA7654KPPNNF2S3HVMDMR/events.json","paper":"https://pith.science/paper/2FXAYJA7"},"agent_actions":{"view_html":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR","download_json":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR.json","view_paper":"https://pith.science/paper/2FXAYJA7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9703035&json=true","fetch_graph":"https://pith.science/api/pith-number/2FXAYJA7654KPPNNF2S3HVMDMR/graph.json","fetch_events":"https://pith.science/api/pith-number/2FXAYJA7654KPPNNF2S3HVMDMR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR/action/storage_attestation","attest_author":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR/action/author_attestation","sign_citation":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR/action/citation_signature","submit_replication":"https://pith.science/pith/2FXAYJA7654KPPNNF2S3HVMDMR/action/replication_record"}},"created_at":"2026-05-18T01:07:38.619140+00:00","updated_at":"2026-05-18T01:07:38.619140+00:00"}