{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:HV6X4X3ZXGQTSNA5NRGOGHTN36","short_pith_number":"pith:HV6X4X3Z","schema_version":"1.0","canonical_sha256":"3d7d7e5f79b9a139341d6c4ce31e6ddf9b42f844643f815c532dbcc95b062f5f","source":{"kind":"arxiv","id":"1301.5870","version":2},"attestation_state":"computed","paper":{"title":"Groups of two galaxies in SDSS: implications of colours on star formation quenching time-scales","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew R. Zentner, Christopher Q. Trinh, Elizabeth J. Barton, James S. Bullock, Michael C. Cooper, Risa H. Wechsler","submitted_at":"2013-01-24T19:21:13Z","abstract_excerpt":"We have devised a method to select galaxies that are isolated in their dark matter halo (N=1 systems) and galaxies that reside in a group of exactly two (N=2 systems). Our N=2 systems are widely-separated (up to $\\sim$\\,200\\,$h^{-1}$\\,kpc), where close galaxy-galaxy interactions are not dominant. We apply our selection criteria to two volume-limited samples of galaxies from SDSS DR6 with $M_{r}-5 \\log_{10} h \\leq$ -19 and -20 to study the effects of the environment of very sparse groups on galaxy colour. For satellite galaxies in a group of two, we find a red excess attributed to star formatio"},"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":"1301.5870","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-01-24T19:21:13Z","cross_cats_sorted":[],"title_canon_sha256":"81343af6d6467c5621f01a6edf3ce4eae73f54ba7ac0ed94954e39d8b3307121","abstract_canon_sha256":"0111b5764fd30b4f6523c4ff64f4854d3450c1ac24b7061149e9254b476d2ef7"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:11:59.238377Z","signature_b64":"HJV2xkLWKluLWO5zBkOPajhXrNpof3/WQ29gDY3QzYzUX1TpyxGDaR8jdmCOZ27EeIkT4AeqBgsOyWFQCQjiDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3d7d7e5f79b9a139341d6c4ce31e6ddf9b42f844643f815c532dbcc95b062f5f","last_reissued_at":"2026-05-18T03:11:59.237781Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:11:59.237781Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Groups of two galaxies in SDSS: implications of colours on star formation quenching time-scales","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Andrew R. Zentner, Christopher Q. Trinh, Elizabeth J. Barton, James S. Bullock, Michael C. Cooper, Risa H. Wechsler","submitted_at":"2013-01-24T19:21:13Z","abstract_excerpt":"We have devised a method to select galaxies that are isolated in their dark matter halo (N=1 systems) and galaxies that reside in a group of exactly two (N=2 systems). Our N=2 systems are widely-separated (up to $\\sim$\\,200\\,$h^{-1}$\\,kpc), where close galaxy-galaxy interactions are not dominant. We apply our selection criteria to two volume-limited samples of galaxies from SDSS DR6 with $M_{r}-5 \\log_{10} h \\leq$ -19 and -20 to study the effects of the environment of very sparse groups on galaxy colour. For satellite galaxies in a group of two, we find a red excess attributed to star formatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.5870","kind":"arxiv","version":2},"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":"1301.5870","created_at":"2026-05-18T03:11:59.237873+00:00"},{"alias_kind":"arxiv_version","alias_value":"1301.5870v2","created_at":"2026-05-18T03:11:59.237873+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.5870","created_at":"2026-05-18T03:11:59.237873+00:00"},{"alias_kind":"pith_short_12","alias_value":"HV6X4X3ZXGQT","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_16","alias_value":"HV6X4X3ZXGQTSNA5","created_at":"2026-05-18T12:27:46.883200+00:00"},{"alias_kind":"pith_short_8","alias_value":"HV6X4X3Z","created_at":"2026-05-18T12:27:46.883200+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/HV6X4X3ZXGQTSNA5NRGOGHTN36","json":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36.json","graph_json":"https://pith.science/api/pith-number/HV6X4X3ZXGQTSNA5NRGOGHTN36/graph.json","events_json":"https://pith.science/api/pith-number/HV6X4X3ZXGQTSNA5NRGOGHTN36/events.json","paper":"https://pith.science/paper/HV6X4X3Z"},"agent_actions":{"view_html":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36","download_json":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36.json","view_paper":"https://pith.science/paper/HV6X4X3Z","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1301.5870&json=true","fetch_graph":"https://pith.science/api/pith-number/HV6X4X3ZXGQTSNA5NRGOGHTN36/graph.json","fetch_events":"https://pith.science/api/pith-number/HV6X4X3ZXGQTSNA5NRGOGHTN36/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36/action/timestamp_anchor","attest_storage":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36/action/storage_attestation","attest_author":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36/action/author_attestation","sign_citation":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36/action/citation_signature","submit_replication":"https://pith.science/pith/HV6X4X3ZXGQTSNA5NRGOGHTN36/action/replication_record"}},"created_at":"2026-05-18T03:11:59.237873+00:00","updated_at":"2026-05-18T03:11:59.237873+00:00"}