{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:6SZ72HLPLO6GKQPYIF2UN5EHFB","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b0d0235083824134d91eda29320eacde32a72dfdae85e411ff4b60a8e8689ef0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-08-05T11:51:51Z","title_canon_sha256":"0cebdd660eb65132579d5898318f1e588d0fc801788cfbdebc2f37994fd4fb46"},"schema_version":"1.0","source":{"id":"2308.02853","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.02853","created_at":"2026-07-05T06:38:08Z"},{"alias_kind":"arxiv_version","alias_value":"2308.02853v1","created_at":"2026-07-05T06:38:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.02853","created_at":"2026-07-05T06:38:08Z"},{"alias_kind":"pith_short_12","alias_value":"6SZ72HLPLO6G","created_at":"2026-07-05T06:38:08Z"},{"alias_kind":"pith_short_16","alias_value":"6SZ72HLPLO6GKQPY","created_at":"2026-07-05T06:38:08Z"},{"alias_kind":"pith_short_8","alias_value":"6SZ72HLP","created_at":"2026-07-05T06:38:08Z"}],"graph_snapshots":[{"event_id":"sha256:3e6d6a64f7d179cc6d3325082513f17fcb8f89cfbf2fa3c763e0b2a6c75dae6c","target":"graph","created_at":"2026-07-05T06:38:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2308.02853/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Metallicity gradients refer to the sloped radial profile of metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which are good stellar tracers thanks to their period-luminosity relation allowing precise distance estimation and other advantages. However, the measurement of the inner-disk gradient has been impeded by the incompleteness of previous samples of Cepheids and limitations of optical spectroscopy in observing highly reddened objects. Here we report the meta","authors_text":"A. McWilliam, C. Hull, D. Taniguchi, G. Bono, H. Katoh, H. Kawakita, J. Baba, N. Matsunaga, R. Albarracin, S. Hamano, S. Otsubo, S. S. Elgueta, T. Takeuchi, T. Tsujimoto, V. D'Orazi, Y. Ikeda, Y. Sarugaku","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-08-05T11:51:51Z","title":"Metallicities of Classical Cepheids in the Inner Galactic Disk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.02853","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:6d47284d920290c7ba42bf8533d570b6f5dadc75ee9fb49e1db95306d3be03da","target":"record","created_at":"2026-07-05T06:38:08Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b0d0235083824134d91eda29320eacde32a72dfdae85e411ff4b60a8e8689ef0","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2023-08-05T11:51:51Z","title_canon_sha256":"0cebdd660eb65132579d5898318f1e588d0fc801788cfbdebc2f37994fd4fb46"},"schema_version":"1.0","source":{"id":"2308.02853","kind":"arxiv","version":1}},"canonical_sha256":"f4b3fd1d6f5bbc6541f8417546f487286946b77addb735878c06d033d374e548","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f4b3fd1d6f5bbc6541f8417546f487286946b77addb735878c06d033d374e548","first_computed_at":"2026-07-05T06:38:08.473338Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:38:08.473338Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qbv4R2E79pfFGO5HJ/I7FACmFgU2bQGhLOKCelnKGUc3Oss2RcBihQLWEpih+DXwOi4vFGxHKRHqRhRpbN3ODQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:38:08.473873Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.02853","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6d47284d920290c7ba42bf8533d570b6f5dadc75ee9fb49e1db95306d3be03da","sha256:3e6d6a64f7d179cc6d3325082513f17fcb8f89cfbf2fa3c763e0b2a6c75dae6c"],"state_sha256":"849368ace15248fb6a0765778decd87bef547a88182ff0efe59f75e0003c7df7"}