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Its color-magnitude diagrams show the clear existence of the main-sequence stars, of which turn-off point is located around V ~ 18.45 mag and B-V ~ 0.85 mag. Three red clump (RC) stars are identified at V = 16.00 mag, I = 14.41 mag and B-V = 1.35 mag. From the mean Ks-band magnitude of RC stars (Ks=12.39 +- 0.21 mag) in Ruprecht 6 from 2MASS photometry and the known absolute magnitudes of the RC stars (M_Ks = -1.595 +- 0.025 mag), we obtain t"},"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":"1706.03061","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-06-09T06:43:24Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"4318ea2ecd5bd308c0878db0049e5ffb0c53758c6acc6d95c4a6580c7aa33329","abstract_canon_sha256":"0f9a7975f4485db7b549bdff66ed2163625bff5841b9158a561370c4404719bb"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:39:34.008078Z","signature_b64":"6yhC64VdrWYpbO1lVMYTnZyiT+lINqxvn2jtAmNFtHeLWwXsC+OjH4uF7sCD4ueTi1WAiM9qOloLqUFMGWjbCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"19252bcef54cfdad7cdbb963a1290ed45a23f917b2fd6e73a54d23278c6dd187","last_reissued_at":"2026-05-18T00:39:34.007445Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:39:34.007445Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"BVI Photometric Study of the Old Open Cluster Ruprecht 6","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Dae-Sik Moon (U Toronto), Hong Soo Park (KASI/UST), Ilseung Han (KASI/KNU), Jaemann Kyeong (KASI), Joon Hyeop Lee (KASI/UST), Sang Chul KIM (KASI/UST), Seongjae Kim (KASI/KNU), Youngdae Lee (KASI)","submitted_at":"2017-06-09T06:43:24Z","abstract_excerpt":"We present a BVI optical photometric study of the old open cluster Ruprecht 6 using the data obtained with the SMARTS 1.0 m telescope at the CTIO, Chile. 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From the mean Ks-band magnitude of RC stars (Ks=12.39 +- 0.21 mag) in Ruprecht 6 from 2MASS photometry and the known absolute magnitudes of the RC stars (M_Ks = -1.595 +- 0.025 mag), we obtain t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.03061","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":"1706.03061","created_at":"2026-05-18T00:39:34.007537+00:00"},{"alias_kind":"arxiv_version","alias_value":"1706.03061v1","created_at":"2026-05-18T00:39:34.007537+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.03061","created_at":"2026-05-18T00:39:34.007537+00:00"},{"alias_kind":"pith_short_12","alias_value":"DESSXTXVJT62","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_16","alias_value":"DESSXTXVJT6227G3","created_at":"2026-05-18T12:31:10.602751+00:00"},{"alias_kind":"pith_short_8","alias_value":"DESSXTXV","created_at":"2026-05-18T12:31:10.602751+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/DESSXTXVJT6227G3XFR2CKIO2R","json":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R.json","graph_json":"https://pith.science/api/pith-number/DESSXTXVJT6227G3XFR2CKIO2R/graph.json","events_json":"https://pith.science/api/pith-number/DESSXTXVJT6227G3XFR2CKIO2R/events.json","paper":"https://pith.science/paper/DESSXTXV"},"agent_actions":{"view_html":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R","download_json":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R.json","view_paper":"https://pith.science/paper/DESSXTXV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1706.03061&json=true","fetch_graph":"https://pith.science/api/pith-number/DESSXTXVJT6227G3XFR2CKIO2R/graph.json","fetch_events":"https://pith.science/api/pith-number/DESSXTXVJT6227G3XFR2CKIO2R/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R/action/storage_attestation","attest_author":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R/action/author_attestation","sign_citation":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R/action/citation_signature","submit_replication":"https://pith.science/pith/DESSXTXVJT6227G3XFR2CKIO2R/action/replication_record"}},"created_at":"2026-05-18T00:39:34.007537+00:00","updated_at":"2026-05-18T00:39:34.007537+00:00"}