{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:37UVYAGE4OVREHT3TDTLYGLKW6","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":"af6a3ef3efb9da71e58d6883f9b9caf492046ece882c12b5e0319dcbb2a33d2e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-15T20:00:01Z","title_canon_sha256":"0f5f0c9be466305b67b2ca4ec2cef9de54fe8e1b3f487fd24b07757db4f9bfdb"},"schema_version":"1.0","source":{"id":"1307.4081","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1307.4081","created_at":"2026-05-18T01:48:49Z"},{"alias_kind":"arxiv_version","alias_value":"1307.4081v1","created_at":"2026-05-18T01:48:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1307.4081","created_at":"2026-05-18T01:48:49Z"},{"alias_kind":"pith_short_12","alias_value":"37UVYAGE4OVR","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_16","alias_value":"37UVYAGE4OVREHT3","created_at":"2026-05-18T12:27:32Z"},{"alias_kind":"pith_short_8","alias_value":"37UVYAGE","created_at":"2026-05-18T12:27:32Z"}],"graph_snapshots":[{"event_id":"sha256:017c8a013349f894a2b4d74b590ecb7a812d8bafd6e8e172f7b5372a432681f8","target":"graph","created_at":"2026-05-18T01:48:49Z","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"},"paper":{"abstract_excerpt":"We use medium-band near-infrared (NIR) Hubble Space Telescope WFC3 photometry with model NIR spectra of Asymptotic Giant Branch (AGB) stars to develop a new tool for efficiently distinguishing carbon-rich (C-type) AGB stars from oxygen-rich (M-type) AGB stars in galaxies at the edge of and outside the Local Group. We present the results of a test of this method on a region of the inner disk of M31, where we find a surprising lack of C stars, contrary to the findings of previous C star searches in other regions of M31. We find only 1 candidate C star (plus up to 6 additional, less certain C sta","authors_text":"B. Aringer, B. F. Williams, C. E. Dorman, D. R. Weisz, J. J. Dalcanton, J. L. Melbourne, K. A. G. Olsen, L. Girardi, M. L. Boyer, P. Guhathakurta, P. Marigo, P. Rosenfield, W. Nowotny","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-15T20:00:01Z","title":"Is there a metallicity ceiling to form carbon stars? - A novel technique reveals a scarcity of C stars in the inner M31 disk"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1307.4081","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":"sha256:0e7316c811179eaffe663f8d9a2158d1608795fa5c5e78a2c12315529b09a3d8","target":"record","created_at":"2026-05-18T01:48:49Z","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":"af6a3ef3efb9da71e58d6883f9b9caf492046ece882c12b5e0319dcbb2a33d2e","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-07-15T20:00:01Z","title_canon_sha256":"0f5f0c9be466305b67b2ca4ec2cef9de54fe8e1b3f487fd24b07757db4f9bfdb"},"schema_version":"1.0","source":{"id":"1307.4081","kind":"arxiv","version":1}},"canonical_sha256":"dfe95c00c4e3ab121e7b98e6bc196ab79ab703b906475c93c659ca42e17e9e0a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dfe95c00c4e3ab121e7b98e6bc196ab79ab703b906475c93c659ca42e17e9e0a","first_computed_at":"2026-05-18T01:48:49.973551Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:48:49.973551Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1kTQtM3Nhbd4FOqteRbw45njlmbYC5lZEO8hd+6zqM+qpfyCBr1aYhcwmkFSBxIhxNt3+DgjqJUxtHUj6qdyAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:48:49.974242Z","signed_message":"canonical_sha256_bytes"},"source_id":"1307.4081","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0e7316c811179eaffe663f8d9a2158d1608795fa5c5e78a2c12315529b09a3d8","sha256:017c8a013349f894a2b4d74b590ecb7a812d8bafd6e8e172f7b5372a432681f8"],"state_sha256":"3d8a036a204abad1840a281959446c4550ca4d6a1f4a73d6c66f7305959e0b5a"}