{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:ITBZMTREPBNXVN65VZYLF4Q7CD","short_pith_number":"pith:ITBZMTRE","schema_version":"1.0","canonical_sha256":"44c3964e24785b7ab7ddae70b2f21f10e58fd64f57ff0f6e88416b1e9340208e","source":{"kind":"arxiv","id":"1105.5378","version":1},"attestation_state":"computed","paper":{"title":"A Survey of CN and CH Variations in Galactic Globular Clusters from SDSS Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jason P. Smolinski, Sarah L. Martell, Timothy C. Beers, Young Sun Lee","submitted_at":"2011-05-26T19:18:13Z","abstract_excerpt":"We present a homogeneous survey of the CN and CH bandstrengths in eight Galactic globular clusters observed during the course of the Sloan Extension for Galactic Understanding and Exploration (SEGUE) sub-survey of the SDSS. We confirm the existence of a bimodal CN distribution among RGB stars in all of the clusters with metallicity greater than [Fe/H] = -1.7; the lowest metallicity cluster with an observed CN bimodality is M53, with [Fe/H] ~ -2.1. There is also some evidence for individual CN groups on the subgiant branches of M92, M2, and M13, and on the red giant branches of M92 and NGC 5053"},"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":"1105.5378","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-05-26T19:18:13Z","cross_cats_sorted":[],"title_canon_sha256":"6db61f782662426ea6bc1b89366c81cec468dbd65c582dd4f6cb83f5cc0f2987","abstract_canon_sha256":"ad02463b7e5a48dea0a166f7e5272ddf3842c73703b0bfba7a2cc48198ad87ff"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:50.319058Z","signature_b64":"jOMLUihejFF+9c5zI3JPRfyVIWBpnRPN2sk7x1Vi/GO4ADFGqM9nvYfACi3gdrlDF3J7ve0WxPktk5dc8wZFCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"44c3964e24785b7ab7ddae70b2f21f10e58fd64f57ff0f6e88416b1e9340208e","last_reissued_at":"2026-05-18T02:01:50.318226Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:50.318226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Survey of CN and CH Variations in Galactic Globular Clusters from SDSS Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Jason P. Smolinski, Sarah L. Martell, Timothy C. Beers, Young Sun Lee","submitted_at":"2011-05-26T19:18:13Z","abstract_excerpt":"We present a homogeneous survey of the CN and CH bandstrengths in eight Galactic globular clusters observed during the course of the Sloan Extension for Galactic Understanding and Exploration (SEGUE) sub-survey of the SDSS. We confirm the existence of a bimodal CN distribution among RGB stars in all of the clusters with metallicity greater than [Fe/H] = -1.7; the lowest metallicity cluster with an observed CN bimodality is M53, with [Fe/H] ~ -2.1. There is also some evidence for individual CN groups on the subgiant branches of M92, M2, and M13, and on the red giant branches of M92 and NGC 5053"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.5378","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":"1105.5378","created_at":"2026-05-18T02:01:50.318371+00:00"},{"alias_kind":"arxiv_version","alias_value":"1105.5378v1","created_at":"2026-05-18T02:01:50.318371+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1105.5378","created_at":"2026-05-18T02:01:50.318371+00:00"},{"alias_kind":"pith_short_12","alias_value":"ITBZMTREPBNX","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_16","alias_value":"ITBZMTREPBNXVN65","created_at":"2026-05-18T12:26:32.869790+00:00"},{"alias_kind":"pith_short_8","alias_value":"ITBZMTRE","created_at":"2026-05-18T12:26:32.869790+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/ITBZMTREPBNXVN65VZYLF4Q7CD","json":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD.json","graph_json":"https://pith.science/api/pith-number/ITBZMTREPBNXVN65VZYLF4Q7CD/graph.json","events_json":"https://pith.science/api/pith-number/ITBZMTREPBNXVN65VZYLF4Q7CD/events.json","paper":"https://pith.science/paper/ITBZMTRE"},"agent_actions":{"view_html":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD","download_json":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD.json","view_paper":"https://pith.science/paper/ITBZMTRE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1105.5378&json=true","fetch_graph":"https://pith.science/api/pith-number/ITBZMTREPBNXVN65VZYLF4Q7CD/graph.json","fetch_events":"https://pith.science/api/pith-number/ITBZMTREPBNXVN65VZYLF4Q7CD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD/action/storage_attestation","attest_author":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD/action/author_attestation","sign_citation":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD/action/citation_signature","submit_replication":"https://pith.science/pith/ITBZMTREPBNXVN65VZYLF4Q7CD/action/replication_record"}},"created_at":"2026-05-18T02:01:50.318371+00:00","updated_at":"2026-05-18T02:01:50.318371+00:00"}