{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:PI2TGLOCTCMZZCOWMHPAJIXLAA","short_pith_number":"pith:PI2TGLOC","schema_version":"1.0","canonical_sha256":"7a35332dc298999c89d661de04a2eb00383d1926eaeadbe107e0f697d1018d08","source":{"kind":"arxiv","id":"1508.06942","version":1},"attestation_state":"computed","paper":{"title":"Variable Stars in Local Group Galaxies. I: Tracing the Early Chemical Enrichment and Radial Gradients in the Sculptor dSph with RR Lyrae Stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. Udalski, C. E. Mart\\'inez-V\\'azquez, C. Gallart, E. J. Bernard, G. Bono, G. Fiorentino, G. Iannicola, I. Ferraro, M. Monelli, P. B. Stetson","submitted_at":"2015-08-27T17:18:55Z","abstract_excerpt":"We identified and characterized the largest (536) RR Lyrae (RRL) sample in a Milky Way dSph satellite (Sculptor) based on optical photometry data collected over $\\sim$24 years.\n  The RRLs display a spread in V-magnitude ($\\sim$0.35 mag) which appears larger than photometric errors and the horizontal branch (HB) luminosity evolution of a mono-metallic population. Using several calibrations of two different reddening free and metal independent Period-Wesenheit relations we provide a new distance estimate $\\mu$=19.62 mag ($\\sigma_{\\mu}$=0.04 mag) that agrees well with literature estimates. We con"},"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":"1508.06942","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-08-27T17:18:55Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"b6ce87dfe42ad819fea4fa0d3c13a832a28a274374276117a13bf572def9821d","abstract_canon_sha256":"ddc374ba14bdfb59696bc22ae133edd8a71a174123c8847e9d07a511814a2d8a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:34:37.252670Z","signature_b64":"4zDfXZdfqkIrtw4+6zdKQKrulqj6idmm4295XU1TpTjXkdqym5baexHpmqcHCG9M3btW9CmMOvyyETUgId6cCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a35332dc298999c89d661de04a2eb00383d1926eaeadbe107e0f697d1018d08","last_reissued_at":"2026-05-18T01:34:37.252009Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:34:37.252009Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Variable Stars in Local Group Galaxies. 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Using several calibrations of two different reddening free and metal independent Period-Wesenheit relations we provide a new distance estimate $\\mu$=19.62 mag ($\\sigma_{\\mu}$=0.04 mag) that agrees well with literature estimates. 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