{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:QY2XCI7DEPTCZ4BHAYUGV54NND","short_pith_number":"pith:QY2XCI7D","canonical_record":{"source":{"id":"1006.5453","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"e419edc0263bd4bf027965d8c30b401f7045254ab9b2b65342b3ff00bf1a6ed0","abstract_canon_sha256":"37f1ad6993477afde70ddbb6d5c425996d21dce12ec2bb7b69486d0bf5b91b56"},"schema_version":"1.0"},"canonical_sha256":"86357123e323e62cf02706286af78d68fd0fbf4eab35d97272206e9c936ca769","source":{"kind":"arxiv","id":"1006.5453","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.5453","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"arxiv_version","alias_value":"1006.5453v1","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.5453","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"pith_short_12","alias_value":"QY2XCI7DEPTC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"QY2XCI7DEPTCZ4BH","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"QY2XCI7D","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:QY2XCI7DEPTCZ4BHAYUGV54NND","target":"record","payload":{"canonical_record":{"source":{"id":"1006.5453","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"e419edc0263bd4bf027965d8c30b401f7045254ab9b2b65342b3ff00bf1a6ed0","abstract_canon_sha256":"37f1ad6993477afde70ddbb6d5c425996d21dce12ec2bb7b69486d0bf5b91b56"},"schema_version":"1.0"},"canonical_sha256":"86357123e323e62cf02706286af78d68fd0fbf4eab35d97272206e9c936ca769","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:06:34.745245Z","signature_b64":"+V+JfIuf9s3f4m1v0cednXfTNz/70cDLXC2hzCUQ5ytgYIyU1Njs7N/TmQpoYVzXGBvF1NcU37jxQnND8f2rDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"86357123e323e62cf02706286af78d68fd0fbf4eab35d97272206e9c936ca769","last_reissued_at":"2026-05-18T02:06:34.744429Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:06:34.744429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1006.5453","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:06:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eodLU8HYiiRK4Ik1HQX7Ma0cuEDkrrAtmaEWdo61qZhj1avvrirCQ2SJcEHYinT4CZ88KN9K/q87g2EkQ/gOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:02:26.916869Z"},"content_sha256":"71c676a683da4dc16abae4a7ede09ad15dc6510442ca28be2a1ca7c72fff008e","schema_version":"1.0","event_id":"sha256:71c676a683da4dc16abae4a7ede09ad15dc6510442ca28be2a1ca7c72fff008e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:QY2XCI7DEPTCZ4BHAYUGV54NND","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Age Spread of Quiescent Galaxies with the NEWFIRM Medium-band Survey: Identification of the Oldest Galaxies out to z~2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Muzzin, D.A. Wake, D. Marchesini, G. Brammer, G.D. Illingworth, G. Rudnick, I. Labbe, K.E. Whitaker, K.-S. Lee, M. Franx, M. Kriek, P.G. van Dokkum, R. Bezanson, R.F. Quadri","submitted_at":"2010-06-28T20:00:04Z","abstract_excerpt":"With a complete, mass-selected sample of quiescent galaxies from the NEWFIRM Medium-Band Survey (NMBS), we study the stellar populations of the oldest and most massive galaxies (>10^11 Msun) to high redshift. The sample includes 570 quiescent galaxies selected based on their extinction-corrected U-V colors out to z=2.2, with accurate photometric redshifts, sigma_z/(1+z)~2%, and rest-frame colors, sigma_U-V~0.06 mag. We measure an increase in the intrinsic scatter of the rest-frame U-V colors of quiescent galaxies with redshift. This scatter in color arises from the spread in ages of the quiesc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.5453","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:06:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZWJ8APgbs+Ka6a2S53cGPuDD61GfYfW4dOAhTtDQ8jg+7pjZEkk1MfvvlX0AtgqaOJ6ZAorVKVHM9zNZfPNSDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T12:02:26.917407Z"},"content_sha256":"a500ec2afde981f62a9f0a0d376f09f662585b45ea38e39772485d69a6917a0b","schema_version":"1.0","event_id":"sha256:a500ec2afde981f62a9f0a0d376f09f662585b45ea38e39772485d69a6917a0b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/bundle.json","state_url":"https://pith.science/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-25T12:02:26Z","links":{"resolver":"https://pith.science/pith/QY2XCI7DEPTCZ4BHAYUGV54NND","bundle":"https://pith.science/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/bundle.json","state":"https://pith.science/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QY2XCI7DEPTCZ4BHAYUGV54NND/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:QY2XCI7DEPTCZ4BHAYUGV54NND","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":"37f1ad6993477afde70ddbb6d5c425996d21dce12ec2bb7b69486d0bf5b91b56","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:00:04Z","title_canon_sha256":"e419edc0263bd4bf027965d8c30b401f7045254ab9b2b65342b3ff00bf1a6ed0"},"schema_version":"1.0","source":{"id":"1006.5453","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1006.5453","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"arxiv_version","alias_value":"1006.5453v1","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1006.5453","created_at":"2026-05-18T02:06:34Z"},{"alias_kind":"pith_short_12","alias_value":"QY2XCI7DEPTC","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"QY2XCI7DEPTCZ4BH","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"QY2XCI7D","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:a500ec2afde981f62a9f0a0d376f09f662585b45ea38e39772485d69a6917a0b","target":"graph","created_at":"2026-05-18T02:06:34Z","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":"With a complete, mass-selected sample of quiescent galaxies from the NEWFIRM Medium-Band Survey (NMBS), we study the stellar populations of the oldest and most massive galaxies (>10^11 Msun) to high redshift. The sample includes 570 quiescent galaxies selected based on their extinction-corrected U-V colors out to z=2.2, with accurate photometric redshifts, sigma_z/(1+z)~2%, and rest-frame colors, sigma_U-V~0.06 mag. We measure an increase in the intrinsic scatter of the rest-frame U-V colors of quiescent galaxies with redshift. This scatter in color arises from the spread in ages of the quiesc","authors_text":"A. Muzzin, D.A. Wake, D. Marchesini, G. Brammer, G.D. Illingworth, G. Rudnick, I. Labbe, K.E. Whitaker, K.-S. Lee, M. Franx, M. Kriek, P.G. van Dokkum, R. Bezanson, R.F. Quadri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:00:04Z","title":"The Age Spread of Quiescent Galaxies with the NEWFIRM Medium-band Survey: Identification of the Oldest Galaxies out to z~2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1006.5453","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":"sha256:71c676a683da4dc16abae4a7ede09ad15dc6510442ca28be2a1ca7c72fff008e","target":"record","created_at":"2026-05-18T02:06:34Z","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":"37f1ad6993477afde70ddbb6d5c425996d21dce12ec2bb7b69486d0bf5b91b56","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-06-28T20:00:04Z","title_canon_sha256":"e419edc0263bd4bf027965d8c30b401f7045254ab9b2b65342b3ff00bf1a6ed0"},"schema_version":"1.0","source":{"id":"1006.5453","kind":"arxiv","version":1}},"canonical_sha256":"86357123e323e62cf02706286af78d68fd0fbf4eab35d97272206e9c936ca769","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"86357123e323e62cf02706286af78d68fd0fbf4eab35d97272206e9c936ca769","first_computed_at":"2026-05-18T02:06:34.744429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:06:34.744429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+V+JfIuf9s3f4m1v0cednXfTNz/70cDLXC2hzCUQ5ytgYIyU1Njs7N/TmQpoYVzXGBvF1NcU37jxQnND8f2rDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:06:34.745245Z","signed_message":"canonical_sha256_bytes"},"source_id":"1006.5453","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71c676a683da4dc16abae4a7ede09ad15dc6510442ca28be2a1ca7c72fff008e","sha256:a500ec2afde981f62a9f0a0d376f09f662585b45ea38e39772485d69a6917a0b"],"state_sha256":"d87333e38804f39e08f9b97d325df7ff50bb7220281f5b465a125148b0053884"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DTrTSqCt187zFH7K/9ifw/hjWLPRg7OSMqkzhQjUxRMrqb/vc1nJWEJJTOfQx4uUXqfXWycRC+/bFF2nrAbUDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T12:02:26.919879Z","bundle_sha256":"02ba70ab0c5f902b7d588234699a69b03ee5570ff2db60e4b87bab43d342cd60"}}