{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:END4IYYCDTTSZ5VSXVX6PINRZC","short_pith_number":"pith:END4IYYC","canonical_record":{"source":{"id":"2402.05184","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-02-07T19:00:35Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"58a54f13ac204a0f1b91525514eea2b4f2cdc4fe7e9b3fc1293c092c47838074","abstract_canon_sha256":"632cd600f2818b1d244ac1dd15165cb4f7cd03bf5c3e5562631030f12ef32612"},"schema_version":"1.0"},"canonical_sha256":"2347c463021ce72cf6b2bd6fe7a1b1c8a85404da3e5906fb7ab3b7c3c2584984","source":{"kind":"arxiv","id":"2402.05184","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.05184","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"arxiv_version","alias_value":"2402.05184v1","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.05184","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_12","alias_value":"END4IYYCDTTS","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_16","alias_value":"END4IYYCDTTSZ5VS","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_8","alias_value":"END4IYYC","created_at":"2026-07-05T07:42:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:END4IYYCDTTSZ5VSXVX6PINRZC","target":"record","payload":{"canonical_record":{"source":{"id":"2402.05184","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-02-07T19:00:35Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"58a54f13ac204a0f1b91525514eea2b4f2cdc4fe7e9b3fc1293c092c47838074","abstract_canon_sha256":"632cd600f2818b1d244ac1dd15165cb4f7cd03bf5c3e5562631030f12ef32612"},"schema_version":"1.0"},"canonical_sha256":"2347c463021ce72cf6b2bd6fe7a1b1c8a85404da3e5906fb7ab3b7c3c2584984","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:42:45.902512Z","signature_b64":"Ye0iAyBR1bT6TMicupgUdTbWDVoYKld8ylCDvotnlyFUMFId9wUvEYa76r/V3zspST1orQt5yyP9Sd5QxG1FDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2347c463021ce72cf6b2bd6fe7a1b1c8a85404da3e5906fb7ab3b7c3c2584984","last_reissued_at":"2026-07-05T07:42:45.902165Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:42:45.902165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2402.05184","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:42:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AAGr09LoxeiafLMYazfKCFVLTlwC4M1iPYcdPqVIuv3MAnpPCopE0vca1PjV2P7o+XONKUeVmQYN5BrwTs3rDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T18:06:51.078288Z"},"content_sha256":"3e62fecb761471ca9a9e253ef452078b7cca003a86e2dbdb3cb54c4bbd21f8f2","schema_version":"1.0","event_id":"sha256:3e62fecb761471ca9a9e253ef452078b7cca003a86e2dbdb3cb54c4bbd21f8f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:END4IYYCDTTSZ5VSXVX6PINRZC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A self-consistent data-driven model for determining stellar parameters from optical and near-IR spectra","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"Brian Hutchinson, Diego Llanes, Keivan G. Stassun, Logan Sizemore, Marina Kounkel, Vedant Chandra","submitted_at":"2024-02-07T19:00:35Z","abstract_excerpt":"Data-driven models, which apply machine learning to infer physical properties from large quantities of data, have become increasingly important for extracting stellar properties from spectra. In general, these methods have been applied to data in one wavelength regime or another. For example, APOGEE Net has been applied to near-IR spectra from the SDSS-V APOGEE survey to predict stellar parameters (Teff, log g, and [Fe/H]) for all stars with Teff from 3,000 to 50,000 K, including pre-main sequence stars, OB stars, main sequence dwarfs, and red giants. The increasing number of large surveys acr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.05184","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2402.05184/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T07:42:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"adqNPHpCaGZD61p3RFxim0DUERM2a0mnY9La5hK8r7x9ivP93WMPocRdpFZQMe6bCJxqCVVuCHFp3tOCJnBmAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T18:06:51.078679Z"},"content_sha256":"da83affa0913de7821edd67fc3b0c3aad945bb603bb3453bf0fa1f95e1c8965b","schema_version":"1.0","event_id":"sha256:da83affa0913de7821edd67fc3b0c3aad945bb603bb3453bf0fa1f95e1c8965b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/END4IYYCDTTSZ5VSXVX6PINRZC/bundle.json","state_url":"https://pith.science/pith/END4IYYCDTTSZ5VSXVX6PINRZC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/END4IYYCDTTSZ5VSXVX6PINRZC/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-06T18:06:51Z","links":{"resolver":"https://pith.science/pith/END4IYYCDTTSZ5VSXVX6PINRZC","bundle":"https://pith.science/pith/END4IYYCDTTSZ5VSXVX6PINRZC/bundle.json","state":"https://pith.science/pith/END4IYYCDTTSZ5VSXVX6PINRZC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/END4IYYCDTTSZ5VSXVX6PINRZC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:END4IYYCDTTSZ5VSXVX6PINRZC","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":"632cd600f2818b1d244ac1dd15165cb4f7cd03bf5c3e5562631030f12ef32612","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-02-07T19:00:35Z","title_canon_sha256":"58a54f13ac204a0f1b91525514eea2b4f2cdc4fe7e9b3fc1293c092c47838074"},"schema_version":"1.0","source":{"id":"2402.05184","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2402.05184","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"arxiv_version","alias_value":"2402.05184v1","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2402.05184","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_12","alias_value":"END4IYYCDTTS","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_16","alias_value":"END4IYYCDTTSZ5VS","created_at":"2026-07-05T07:42:45Z"},{"alias_kind":"pith_short_8","alias_value":"END4IYYC","created_at":"2026-07-05T07:42:45Z"}],"graph_snapshots":[{"event_id":"sha256:da83affa0913de7821edd67fc3b0c3aad945bb603bb3453bf0fa1f95e1c8965b","target":"graph","created_at":"2026-07-05T07:42:45Z","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/2402.05184/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Data-driven models, which apply machine learning to infer physical properties from large quantities of data, have become increasingly important for extracting stellar properties from spectra. In general, these methods have been applied to data in one wavelength regime or another. For example, APOGEE Net has been applied to near-IR spectra from the SDSS-V APOGEE survey to predict stellar parameters (Teff, log g, and [Fe/H]) for all stars with Teff from 3,000 to 50,000 K, including pre-main sequence stars, OB stars, main sequence dwarfs, and red giants. The increasing number of large surveys acr","authors_text":"Brian Hutchinson, Diego Llanes, Keivan G. Stassun, Logan Sizemore, Marina Kounkel, Vedant Chandra","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-02-07T19:00:35Z","title":"A self-consistent data-driven model for determining stellar parameters from optical and near-IR spectra"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2402.05184","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":"sha256:3e62fecb761471ca9a9e253ef452078b7cca003a86e2dbdb3cb54c4bbd21f8f2","target":"record","created_at":"2026-07-05T07:42:45Z","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":"632cd600f2818b1d244ac1dd15165cb4f7cd03bf5c3e5562631030f12ef32612","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2024-02-07T19:00:35Z","title_canon_sha256":"58a54f13ac204a0f1b91525514eea2b4f2cdc4fe7e9b3fc1293c092c47838074"},"schema_version":"1.0","source":{"id":"2402.05184","kind":"arxiv","version":1}},"canonical_sha256":"2347c463021ce72cf6b2bd6fe7a1b1c8a85404da3e5906fb7ab3b7c3c2584984","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2347c463021ce72cf6b2bd6fe7a1b1c8a85404da3e5906fb7ab3b7c3c2584984","first_computed_at":"2026-07-05T07:42:45.902165Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:42:45.902165Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ye0iAyBR1bT6TMicupgUdTbWDVoYKld8ylCDvotnlyFUMFId9wUvEYa76r/V3zspST1orQt5yyP9Sd5QxG1FDg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:42:45.902512Z","signed_message":"canonical_sha256_bytes"},"source_id":"2402.05184","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e62fecb761471ca9a9e253ef452078b7cca003a86e2dbdb3cb54c4bbd21f8f2","sha256:da83affa0913de7821edd67fc3b0c3aad945bb603bb3453bf0fa1f95e1c8965b"],"state_sha256":"8bf6d8cf939736307610e2756a4f0d160488bb62e35c75ec2d038dd56600e6b9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"utlPYpMECB0lsLB/CO1IZfp21zRKpyNpIGsTFj3adsLQ6hfcDhegqoxRoQ9teRxPmCVO6MZOdzf3ISWaPLUBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T18:06:51.080663Z","bundle_sha256":"390305e9333bf7e12d5792f7c7019173e741a1e6913ab95a9c06450fa267114c"}}