{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:RHWMRHMHVLYTMLVG6N4HCMLQGW","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":"16fcc5fb7d3e0c8fbfec46bb448d2b376fde2fb0aee6e529479d2badeae05687","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-03T10:47:47Z","title_canon_sha256":"5e594103f5cb9ef84d700fb25070a260a4c73815ac6a0556825878d945e6b4f8"},"schema_version":"1.0","source":{"id":"0911.0506","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0911.0506","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"arxiv_version","alias_value":"0911.0506v1","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0506","created_at":"2026-05-18T02:11:00Z"},{"alias_kind":"pith_short_12","alias_value":"RHWMRHMHVLYT","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"RHWMRHMHVLYTMLVG","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"RHWMRHMH","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:e7f14ee6ebc1412c16a4a168320e5ca5dbc52347d75a298f86e3877d157279f9","target":"graph","created_at":"2026-05-18T02:11:00Z","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":"Using archival data from the Hubble Space Telescope, we study the quantitative morphological evolution of spectroscopically confirmed bright galaxies in the core regions of nine clusters ranging in redshift from $z = 0.31$ to $z = 0.84$. We use morphological parameters derived from two dimensional bulge-disk decomposition to study the evolution. We find an increase in the mean bulge-to-total luminosity ratio $B/T$ as the Universe evolves. We also find a corresponding increase in the fraction of early type galaxies and in the mean S\\'ersic index. We discuss these results and their implications ","authors_text":"Ajit K. Kembhavi, G. V. Vijayagovindan, Vinu Vikram, Yogesh Wadadekar","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-03T10:47:47Z","title":"Quantitative measure of evolution of bright cluster galaxies at moderate redshifts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0506","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":"sha256:0df1c4e3f4ef0b2b4fc2c37a57fa28feb0d079f17d30e19b15f28535f3271b29","target":"record","created_at":"2026-05-18T02:11:00Z","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":"16fcc5fb7d3e0c8fbfec46bb448d2b376fde2fb0aee6e529479d2badeae05687","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-11-03T10:47:47Z","title_canon_sha256":"5e594103f5cb9ef84d700fb25070a260a4c73815ac6a0556825878d945e6b4f8"},"schema_version":"1.0","source":{"id":"0911.0506","kind":"arxiv","version":1}},"canonical_sha256":"89ecc89d87aaf1362ea6f378713170358da85a97354d1b43f8f2ce95d45fe689","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"89ecc89d87aaf1362ea6f378713170358da85a97354d1b43f8f2ce95d45fe689","first_computed_at":"2026-05-18T02:11:00.303900Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:00.303900Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ddshzsgjwNlkQKnkOFHsBuooBskvF0gVEpeN/CsAMA/drIKWuNyCXYwo9afbdMC1IHYhALl23fFBUNRs8RCjCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:00.304817Z","signed_message":"canonical_sha256_bytes"},"source_id":"0911.0506","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0df1c4e3f4ef0b2b4fc2c37a57fa28feb0d079f17d30e19b15f28535f3271b29","sha256:e7f14ee6ebc1412c16a4a168320e5ca5dbc52347d75a298f86e3877d157279f9"],"state_sha256":"e4381db41fb6f81ba84e6c224905404dcbe0b6dbc3ce296d400f1ab869ea3dd5"}