{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:MY4LP6HK7L4UJGRKXXFQTOBQDQ","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":"7862946eec583ba85a4c0b5f587f761bd993521b7631219a3401dae7fbde30f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T22:39:43Z","title_canon_sha256":"fc2c3b77498d1cf80c71866c5e327828fd9412f14ec75548d22ab7cd61f6c80f"},"schema_version":"1.0","source":{"id":"1908.04429","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.04429","created_at":"2026-07-05T00:08:36Z"},{"alias_kind":"arxiv_version","alias_value":"1908.04429v1","created_at":"2026-07-05T00:08:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.04429","created_at":"2026-07-05T00:08:36Z"},{"alias_kind":"pith_short_12","alias_value":"MY4LP6HK7L4U","created_at":"2026-07-05T00:08:36Z"},{"alias_kind":"pith_short_16","alias_value":"MY4LP6HK7L4UJGRK","created_at":"2026-07-05T00:08:36Z"},{"alias_kind":"pith_short_8","alias_value":"MY4LP6HK","created_at":"2026-07-05T00:08:36Z"}],"graph_snapshots":[{"event_id":"sha256:e5535294754ed01a0e5aaf9a8a75cf7210cb6edab0370fbdec8a80420af3e5ae","target":"graph","created_at":"2026-07-05T00:08:36Z","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/1908.04429/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present the first measurements of [Fe/H] and [$\\alpha$/Fe] abundances, obtained using spectral synthesis modeling, for red giant branch stars in M31's giant stellar stream. The spectroscopic observations, obtained at a projected distance of 17 kpc from M31's center, yielded 61 stars with [Fe/H] measurements, including 21 stars with [$\\alpha$/Fe] measurements, from 112 targets identified as M31 stars. The [Fe/H] measurements confirm the expectation from photometric metallicity estimates that stars in this region of M31's halo are relatively metal-rich compared to stars in the MW's inner halo","authors_text":"Evan N. Kirby, Ivanna Escala, Jason S. Kalirai, Jennifer Wojno, Karoline M. Gilbert, Puragra Guhathakurta","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T22:39:43Z","title":"Elemental Abundances in M31: First Alpha and Iron Abundance Measurements in M31's Giant Stellar Stream"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.04429","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":"sha256:22100a1ecc1b214affbcd066bed92347ff7f06e38a95feae53ac8f8ffdc53fd2","target":"record","created_at":"2026-07-05T00:08:36Z","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":"7862946eec583ba85a4c0b5f587f761bd993521b7631219a3401dae7fbde30f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2019-08-12T22:39:43Z","title_canon_sha256":"fc2c3b77498d1cf80c71866c5e327828fd9412f14ec75548d22ab7cd61f6c80f"},"schema_version":"1.0","source":{"id":"1908.04429","kind":"arxiv","version":1}},"canonical_sha256":"6638b7f8eafaf9449a2abdcb09b8301c3b1d0d7ebdb9366004572e844c930c51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6638b7f8eafaf9449a2abdcb09b8301c3b1d0d7ebdb9366004572e844c930c51","first_computed_at":"2026-07-05T00:08:36.841273Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:08:36.841273Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lnUMvqm8vDfJM5rsdBPOLIUGYDHxcV1lN2Yw7ALQd2ZEovhxq+PG/3E+U50cpImNlZ2/O7CAjXLN7YQ+baODDA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:08:36.841822Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.04429","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22100a1ecc1b214affbcd066bed92347ff7f06e38a95feae53ac8f8ffdc53fd2","sha256:e5535294754ed01a0e5aaf9a8a75cf7210cb6edab0370fbdec8a80420af3e5ae"],"state_sha256":"a7797a66c7573aa1cbbec67707c6a922825af7e0c73611dbaf2e19c355f63b47"}