{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:X4BZ6RGCBEMJPQISUCLJLBTCMO","short_pith_number":"pith:X4BZ6RGC","schema_version":"1.0","canonical_sha256":"bf039f44c2091897c112a096958662638b9cdc60fffd77bd1980b9069c589e11","source":{"kind":"arxiv","id":"1306.6552","version":1},"attestation_state":"computed","paper":{"title":"The nature of extremely red galaxies in the local universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Ribeiro da Silva, L. Sodr\\'e Jr., W. A. Santos","submitted_at":"2013-06-27T15:55:14Z","abstract_excerpt":"We investigate the nature of extremely red galaxies (ERGs), objects whose colours are redder than those found in the red sequence present in colour-magnitude diagrams of galaxies. We selected from the Sloan Digital Sky Survey Data Release 7 a volume-limited sample of such galaxies in the redshift interval 0.010 < z < 0.030, brighter than M_r = -17.8 (magnitudes dereddened, corrected for the Milky Way extinction) and with (g-r) colours larger than those of galaxies in the red sequence. This sample contains 416 ERGs, which were classified visually. Our classification was cross-checked with other"},"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":"1306.6552","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-27T15:55:14Z","cross_cats_sorted":[],"title_canon_sha256":"90aca394422faada15a9184b6795d059f7a99122dbc09c5eff5718f052183a8c","abstract_canon_sha256":"d6879d6ecb2b88c7f98b0dacae87d3baccb9bfc21118ab51e080db61234bae79"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:07.059061Z","signature_b64":"9sj3bikjdoCGFKNtn5HXGEmw4gQlSmxPV+u/IXQq7CtNArZjBbvyLOKJ0YQSQFA8uUjFtBnA3T+V2X5ebqAaAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bf039f44c2091897c112a096958662638b9cdc60fffd77bd1980b9069c589e11","last_reissued_at":"2026-05-18T01:49:07.058649Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:07.058649Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The nature of extremely red galaxies in the local universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Ribeiro da Silva, L. Sodr\\'e Jr., W. A. Santos","submitted_at":"2013-06-27T15:55:14Z","abstract_excerpt":"We investigate the nature of extremely red galaxies (ERGs), objects whose colours are redder than those found in the red sequence present in colour-magnitude diagrams of galaxies. We selected from the Sloan Digital Sky Survey Data Release 7 a volume-limited sample of such galaxies in the redshift interval 0.010 < z < 0.030, brighter than M_r = -17.8 (magnitudes dereddened, corrected for the Milky Way extinction) and with (g-r) colours larger than those of galaxies in the red sequence. This sample contains 416 ERGs, which were classified visually. Our classification was cross-checked with other"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.6552","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":"1306.6552","created_at":"2026-05-18T01:49:07.058698+00:00"},{"alias_kind":"arxiv_version","alias_value":"1306.6552v1","created_at":"2026-05-18T01:49:07.058698+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.6552","created_at":"2026-05-18T01:49:07.058698+00:00"},{"alias_kind":"pith_short_12","alias_value":"X4BZ6RGCBEMJ","created_at":"2026-05-18T12:28:06.772260+00:00"},{"alias_kind":"pith_short_16","alias_value":"X4BZ6RGCBEMJPQIS","created_at":"2026-05-18T12:28:06.772260+00:00"},{"alias_kind":"pith_short_8","alias_value":"X4BZ6RGC","created_at":"2026-05-18T12:28:06.772260+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"1906.10744","citing_title":"The angular scale of homogeneity in the Local Universe with the SDSS blue galaxies","ref_index":58,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO","json":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO.json","graph_json":"https://pith.science/api/pith-number/X4BZ6RGCBEMJPQISUCLJLBTCMO/graph.json","events_json":"https://pith.science/api/pith-number/X4BZ6RGCBEMJPQISUCLJLBTCMO/events.json","paper":"https://pith.science/paper/X4BZ6RGC"},"agent_actions":{"view_html":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO","download_json":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO.json","view_paper":"https://pith.science/paper/X4BZ6RGC","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1306.6552&json=true","fetch_graph":"https://pith.science/api/pith-number/X4BZ6RGCBEMJPQISUCLJLBTCMO/graph.json","fetch_events":"https://pith.science/api/pith-number/X4BZ6RGCBEMJPQISUCLJLBTCMO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO/action/storage_attestation","attest_author":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO/action/author_attestation","sign_citation":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO/action/citation_signature","submit_replication":"https://pith.science/pith/X4BZ6RGCBEMJPQISUCLJLBTCMO/action/replication_record"}},"created_at":"2026-05-18T01:49:07.058698+00:00","updated_at":"2026-05-18T01:49:07.058698+00:00"}