{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ZUSOX5X45J36D2ISQJIO3PEUUM","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":"58ebf61117cf4369f9033e996843e779e4aefe6dda48bca3177531b2a0c3abb8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-02T21:40:12Z","title_canon_sha256":"8859a3061680450a3c6056b4928ff322d1fb4a32f86fe2d2f77e2f940d83b0ef"},"schema_version":"1.0","source":{"id":"1312.0637","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.0637","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"arxiv_version","alias_value":"1312.0637v3","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.0637","created_at":"2026-05-18T01:45:59Z"},{"alias_kind":"pith_short_12","alias_value":"ZUSOX5X45J36","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_16","alias_value":"ZUSOX5X45J36D2IS","created_at":"2026-05-18T12:28:09Z"},{"alias_kind":"pith_short_8","alias_value":"ZUSOX5X4","created_at":"2026-05-18T12:28:09Z"}],"graph_snapshots":[{"event_id":"sha256:0505c20e0ff767e8c418f1bb587fa7efcf5f6624491cbcc9139ce03da173c90b","target":"graph","created_at":"2026-05-18T01:45:59Z","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":"Understanding the diversity in spectra is the key to determining the physical parameters of galaxies. The optical spectra of galaxies are highly convoluted with continuum and lines which are potentially sensitive to different physical parameters. Defining the wavelength regions of interest is therefore an important question. In this work, we identify informative wavelength regions in a single-burst stellar populations model by using the CUR Matrix Decomposition. Simulating the Lick/IDS spectrograph configuration, we recover the widely used Dn(4000), Hbeta, and HdeltaA to be most informative. S","authors_text":"Alex Szalay (JHU), Ching-Wa Yip (JHU), Istvan Csabai (ELTE), Laszlo Dobos (ELTE), Michael Mahoney (Stanford), Rosemary Wyse (JHU), Tamas Budavari (JHU)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-02T21:40:12Z","title":"Objective Identification of Informative Wavelength Regions in Galaxy Spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.0637","kind":"arxiv","version":3},"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:b62df6cb2c7a47c99e4f33589c3164ce46be02de66977b58bcaee786466dc710","target":"record","created_at":"2026-05-18T01:45:59Z","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":"58ebf61117cf4369f9033e996843e779e4aefe6dda48bca3177531b2a0c3abb8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-12-02T21:40:12Z","title_canon_sha256":"8859a3061680450a3c6056b4928ff322d1fb4a32f86fe2d2f77e2f940d83b0ef"},"schema_version":"1.0","source":{"id":"1312.0637","kind":"arxiv","version":3}},"canonical_sha256":"cd24ebf6fcea77e1e9128250edbc94a305d9ab2250eeea481f25d5f87bb34be4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cd24ebf6fcea77e1e9128250edbc94a305d9ab2250eeea481f25d5f87bb34be4","first_computed_at":"2026-05-18T01:45:59.537250Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:45:59.537250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"scOrLNH6fQShv7jlnpeKMwDJlY+UKSKMPsPsD33VLjRy1cT82nTmQrNDfsDcNLPdyjT6fuNVTCpFOUCI1o6cBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:45:59.537709Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.0637","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b62df6cb2c7a47c99e4f33589c3164ce46be02de66977b58bcaee786466dc710","sha256:0505c20e0ff767e8c418f1bb587fa7efcf5f6624491cbcc9139ce03da173c90b"],"state_sha256":"ee3f9ce4cd477fa85e38ffd086575a05be6301033d2d3bcc8162c711665c0e56"}