{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:HJYB53O7DJYBSNA2JO7DHMK35V","short_pith_number":"pith:HJYB53O7","canonical_record":{"source":{"id":"2404.01269","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-01T17:45:36Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7c6578de6195bb8398bd14a81112f59039a6989c12fb0b59c21c7be3a419ecac","abstract_canon_sha256":"be0a5adbdd6ddba6833811adfb61e1825141a367533881a7196bb81f99074e5e"},"schema_version":"1.0"},"canonical_sha256":"3a701eeddf1a7019341a4bbe33b15bed577a616c2ffb4930e99902af921a22d0","source":{"kind":"arxiv","id":"2404.01269","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.01269","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"arxiv_version","alias_value":"2404.01269v2","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.01269","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_12","alias_value":"HJYB53O7DJYB","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_16","alias_value":"HJYB53O7DJYBSNA2","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_8","alias_value":"HJYB53O7","created_at":"2026-07-05T10:20:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:HJYB53O7DJYBSNA2JO7DHMK35V","target":"record","payload":{"canonical_record":{"source":{"id":"2404.01269","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-01T17:45:36Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7c6578de6195bb8398bd14a81112f59039a6989c12fb0b59c21c7be3a419ecac","abstract_canon_sha256":"be0a5adbdd6ddba6833811adfb61e1825141a367533881a7196bb81f99074e5e"},"schema_version":"1.0"},"canonical_sha256":"3a701eeddf1a7019341a4bbe33b15bed577a616c2ffb4930e99902af921a22d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:20:11.068851Z","signature_b64":"e7ozYj4WaUpkkSWKdzSWJc3q7y1lFXI7e0wJKRhrvVD/cm/sOcpOJFaoASb75qhAuMpzd8Kpkp72tPy3k8DmAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a701eeddf1a7019341a4bbe33b15bed577a616c2ffb4930e99902af921a22d0","last_reissued_at":"2026-07-05T10:20:11.068399Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:20:11.068399Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2404.01269","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T10:20:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ahk4MwxdZOnyhn42SURJVW/R1iGwXgFGGTHOEvuRU4AN9a5xMXbdTyKMNbjYTt4W/otAbZ9+609Daz7eORz3Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T01:48:06.539740Z"},"content_sha256":"00938deaa776db35b26442ba531dfd467e277cd2f77acab77f7233e33323dce8","schema_version":"1.0","event_id":"sha256:00938deaa776db35b26442ba531dfd467e277cd2f77acab77f7233e33323dce8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:HJYB53O7DJYBSNA2JO7DHMK35V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metallicity and $\\alpha$-abundance for 48 million stars in low-extinction regions in the Milky Way","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Kohei Hattori (NAOJ, The Institute of Statistical Mathematics)","submitted_at":"2024-04-01T17:45:36Z","abstract_excerpt":"We estimate ([M/H], [$\\alpha$/M]) for 48 million giants and dwarfs in low-dust extinction regions from the Gaia DR3 XP spectra by using tree-based machine-learning models trained on APOGEE DR17 and metal-poor star sample \\revise{from} Li et al. The root mean square error of our estimation is 0.0890 dex for [M/H] and 0.0436 dex for [$\\alpha$/M], when we evaluate our models \\revise{on} the test data that are not used in training the models. Because the training data is dominated by giants, our estimation is most reliable for giants. The high-[$\\alpha$/M] stars and low-[$\\alpha$/M] stars selected"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.01269","kind":"arxiv","version":2},"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/2404.01269/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":"2026-07-05T10:20:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pJP5BtnB4KIn42EW/yt+GxSDwvcfgikxb6TNa2hf+ca4stKL4V1B4pslJ/yoFZR/Ve0lSuUAlsEEQn3llcMTCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T01:48:06.540575Z"},"content_sha256":"2c641a2ab8e7a06a31bf5f507ab6da0ed2a1e0773cfab78937fa9ad93e2ee498","schema_version":"1.0","event_id":"sha256:2c641a2ab8e7a06a31bf5f507ab6da0ed2a1e0773cfab78937fa9ad93e2ee498"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HJYB53O7DJYBSNA2JO7DHMK35V/bundle.json","state_url":"https://pith.science/pith/HJYB53O7DJYBSNA2JO7DHMK35V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HJYB53O7DJYBSNA2JO7DHMK35V/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":"2026-08-10T01:48:06Z","links":{"resolver":"https://pith.science/pith/HJYB53O7DJYBSNA2JO7DHMK35V","bundle":"https://pith.science/pith/HJYB53O7DJYBSNA2JO7DHMK35V/bundle.json","state":"https://pith.science/pith/HJYB53O7DJYBSNA2JO7DHMK35V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HJYB53O7DJYBSNA2JO7DHMK35V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:HJYB53O7DJYBSNA2JO7DHMK35V","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":"be0a5adbdd6ddba6833811adfb61e1825141a367533881a7196bb81f99074e5e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-01T17:45:36Z","title_canon_sha256":"7c6578de6195bb8398bd14a81112f59039a6989c12fb0b59c21c7be3a419ecac"},"schema_version":"1.0","source":{"id":"2404.01269","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.01269","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"arxiv_version","alias_value":"2404.01269v2","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.01269","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_12","alias_value":"HJYB53O7DJYB","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_16","alias_value":"HJYB53O7DJYBSNA2","created_at":"2026-07-05T10:20:11Z"},{"alias_kind":"pith_short_8","alias_value":"HJYB53O7","created_at":"2026-07-05T10:20:11Z"}],"graph_snapshots":[{"event_id":"sha256:2c641a2ab8e7a06a31bf5f507ab6da0ed2a1e0773cfab78937fa9ad93e2ee498","target":"graph","created_at":"2026-07-05T10:20:11Z","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/2404.01269/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We estimate ([M/H], [$\\alpha$/M]) for 48 million giants and dwarfs in low-dust extinction regions from the Gaia DR3 XP spectra by using tree-based machine-learning models trained on APOGEE DR17 and metal-poor star sample \\revise{from} Li et al. The root mean square error of our estimation is 0.0890 dex for [M/H] and 0.0436 dex for [$\\alpha$/M], when we evaluate our models \\revise{on} the test data that are not used in training the models. Because the training data is dominated by giants, our estimation is most reliable for giants. The high-[$\\alpha$/M] stars and low-[$\\alpha$/M] stars selected","authors_text":"Kohei Hattori (NAOJ, The Institute of Statistical Mathematics)","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-01T17:45:36Z","title":"Metallicity and $\\alpha$-abundance for 48 million stars in low-extinction regions in the Milky Way"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.01269","kind":"arxiv","version":2},"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":"sha256:00938deaa776db35b26442ba531dfd467e277cd2f77acab77f7233e33323dce8","target":"record","created_at":"2026-07-05T10:20:11Z","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":"be0a5adbdd6ddba6833811adfb61e1825141a367533881a7196bb81f99074e5e","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2024-04-01T17:45:36Z","title_canon_sha256":"7c6578de6195bb8398bd14a81112f59039a6989c12fb0b59c21c7be3a419ecac"},"schema_version":"1.0","source":{"id":"2404.01269","kind":"arxiv","version":2}},"canonical_sha256":"3a701eeddf1a7019341a4bbe33b15bed577a616c2ffb4930e99902af921a22d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a701eeddf1a7019341a4bbe33b15bed577a616c2ffb4930e99902af921a22d0","first_computed_at":"2026-07-05T10:20:11.068399Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:20:11.068399Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e7ozYj4WaUpkkSWKdzSWJc3q7y1lFXI7e0wJKRhrvVD/cm/sOcpOJFaoASb75qhAuMpzd8Kpkp72tPy3k8DmAA==","signature_status":"signed_v1","signed_at":"2026-07-05T10:20:11.068851Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.01269","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00938deaa776db35b26442ba531dfd467e277cd2f77acab77f7233e33323dce8","sha256:2c641a2ab8e7a06a31bf5f507ab6da0ed2a1e0773cfab78937fa9ad93e2ee498"],"state_sha256":"4cb424cf46dadee7328c31424788f8a24c7915b95de655d54ed9b710d33763b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GR3Z4+mAvwBTu9xAwB0S1eLN5+JcmyXcuXxlpSmgneSDIB66vzHg6hWvMdbHRe2lgUbQFhz4l1gQ67zkCsYhBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T01:48:06.545176Z","bundle_sha256":"c2766c64b217c25dc4fbf338102d136928c83883a781e5ef8cadf42ebfe87702"}}