{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:46YXEDV3CWTOD3UANIPA2IC5NY","short_pith_number":"pith:46YXEDV3","canonical_record":{"source":{"id":"2109.03149","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-07T15:40:09Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"250d368ba36ae0ce1303653fb3787a9497825e247e56fff476f2378f6590107c","abstract_canon_sha256":"ab1842654d91b5305cca91f0b3f2226c20ce003e5195fc99ce133a4ea37b3eab"},"schema_version":"1.0"},"canonical_sha256":"e7b1720ebb15a6e1ee806a1e0d205d6e128f27c76a06119863619a02aae70245","source":{"kind":"arxiv","id":"2109.03149","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.03149","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"2109.03149v1","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.03149","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"46YXEDV3CWTO","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"46YXEDV3CWTOD3UA","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"46YXEDV3","created_at":"2026-07-05T03:45:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:46YXEDV3CWTOD3UANIPA2IC5NY","target":"record","payload":{"canonical_record":{"source":{"id":"2109.03149","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-07T15:40:09Z","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"title_canon_sha256":"250d368ba36ae0ce1303653fb3787a9497825e247e56fff476f2378f6590107c","abstract_canon_sha256":"ab1842654d91b5305cca91f0b3f2226c20ce003e5195fc99ce133a4ea37b3eab"},"schema_version":"1.0"},"canonical_sha256":"e7b1720ebb15a6e1ee806a1e0d205d6e128f27c76a06119863619a02aae70245","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:45:42.625199Z","signature_b64":"aoiMChHpBtnewESQcrmzbcV7Y3vwcpihhjdf+KugHmFFtdO022gu9ZZt75V5T7sAlxsbSFTCOZuX3TmQETZ9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e7b1720ebb15a6e1ee806a1e0d205d6e128f27c76a06119863619a02aae70245","last_reissued_at":"2026-07-05T03:45:42.624800Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:45:42.624800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2109.03149","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":"2026-07-05T03:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aC5gVCUePeZnBcmyvdcGQWj8wEcgRCUv9y0qv9WZk8WwtfdqGCKQyTBgAIF6fS87yvdB6lREUjDPkx4KxGNFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:15:16.559266Z"},"content_sha256":"a3df11e3b852fb25704295b30de51018d3ca0a458ef3063ea3b2d5aced651e40","schema_version":"1.0","event_id":"sha256:a3df11e3b852fb25704295b30de51018d3ca0a458ef3063ea3b2d5aced651e40"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:46YXEDV3CWTOD3UANIPA2IC5NY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"LAMOST Time-Domain Survey: First Results of four $K$2 plates","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA","astro-ph.IM"],"primary_cat":"astro-ph.SR","authors_text":"A-Li Luo, Bing Du, Bo Zhang, Chao Liu, Chunqian Li, Fang Zuo, Fan Yang, Hailong Yuan, Hao Tian, Haotong Zhang, Henggeng Han, Jian-Ning Fu, Jianrong Shi, Jiao Li, Jifeng Liu, Kaiming Cui, Maosheng Xiang, Mikhail Kovalev, Shaolan Bi, Song Wang, Tanda Li, Weikai Zong, Wen Hou, Yilun Wang, Zhanwen Han, Zhongrui Bai","submitted_at":"2021-09-07T15:40:09Z","abstract_excerpt":"From Oct. 2019 to Apr. 2020, LAMOST performs a time-domain spectroscopic survey of four $K$2 plates with both low- and med-resolution observations. The low-resolution spectroscopic survey gains 282 exposures ($\\approx$46.6 hours) over 25 nights, yielding a total of about 767,000 spectra, and the med-resolution survey takes 177 exposures ($\\approx$49.1 hours) over 27 nights, collecting about 478,000 spectra. More than 70%/50% of low-resolution/med-resolution spectra have signal-to-noise ratio higher than 10. We determine stellar parameters (e.g., $T_{\\rm eff}$, log$g$, [Fe/H]) and radial veloci"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.03149","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/2109.03149/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":"2026-07-05T03:45:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aJEZJucw/dz11x2p9uidc/1jEUUcyD4WHf3t7KTt1G7eQJIduur33vN3rGN6+aWZNNDwj9hGNtY5XFKsQLFyAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T17:15:16.559842Z"},"content_sha256":"092b1dd9a6095ff2184c25a27c16e69c760aa4307c5a21060caf16429bc8cfd4","schema_version":"1.0","event_id":"sha256:092b1dd9a6095ff2184c25a27c16e69c760aa4307c5a21060caf16429bc8cfd4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/46YXEDV3CWTOD3UANIPA2IC5NY/bundle.json","state_url":"https://pith.science/pith/46YXEDV3CWTOD3UANIPA2IC5NY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/46YXEDV3CWTOD3UANIPA2IC5NY/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":"2026-08-03T17:15:16Z","links":{"resolver":"https://pith.science/pith/46YXEDV3CWTOD3UANIPA2IC5NY","bundle":"https://pith.science/pith/46YXEDV3CWTOD3UANIPA2IC5NY/bundle.json","state":"https://pith.science/pith/46YXEDV3CWTOD3UANIPA2IC5NY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/46YXEDV3CWTOD3UANIPA2IC5NY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:46YXEDV3CWTOD3UANIPA2IC5NY","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":"ab1842654d91b5305cca91f0b3f2226c20ce003e5195fc99ce133a4ea37b3eab","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-07T15:40:09Z","title_canon_sha256":"250d368ba36ae0ce1303653fb3787a9497825e247e56fff476f2378f6590107c"},"schema_version":"1.0","source":{"id":"2109.03149","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2109.03149","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"arxiv_version","alias_value":"2109.03149v1","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2109.03149","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_12","alias_value":"46YXEDV3CWTO","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_16","alias_value":"46YXEDV3CWTOD3UA","created_at":"2026-07-05T03:45:42Z"},{"alias_kind":"pith_short_8","alias_value":"46YXEDV3","created_at":"2026-07-05T03:45:42Z"}],"graph_snapshots":[{"event_id":"sha256:092b1dd9a6095ff2184c25a27c16e69c760aa4307c5a21060caf16429bc8cfd4","target":"graph","created_at":"2026-07-05T03:45:42Z","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/2109.03149/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"From Oct. 2019 to Apr. 2020, LAMOST performs a time-domain spectroscopic survey of four $K$2 plates with both low- and med-resolution observations. The low-resolution spectroscopic survey gains 282 exposures ($\\approx$46.6 hours) over 25 nights, yielding a total of about 767,000 spectra, and the med-resolution survey takes 177 exposures ($\\approx$49.1 hours) over 27 nights, collecting about 478,000 spectra. More than 70%/50% of low-resolution/med-resolution spectra have signal-to-noise ratio higher than 10. We determine stellar parameters (e.g., $T_{\\rm eff}$, log$g$, [Fe/H]) and radial veloci","authors_text":"A-Li Luo, Bing Du, Bo Zhang, Chao Liu, Chunqian Li, Fang Zuo, Fan Yang, Hailong Yuan, Hao Tian, Haotong Zhang, Henggeng Han, Jian-Ning Fu, Jianrong Shi, Jiao Li, Jifeng Liu, Kaiming Cui, Maosheng Xiang, Mikhail Kovalev, Shaolan Bi, Song Wang, Tanda Li, Weikai Zong, Wen Hou, Yilun Wang, Zhanwen Han, Zhongrui Bai","cross_cats":["astro-ph.GA","astro-ph.IM"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-07T15:40:09Z","title":"LAMOST Time-Domain Survey: First Results of four $K$2 plates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2109.03149","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:a3df11e3b852fb25704295b30de51018d3ca0a458ef3063ea3b2d5aced651e40","target":"record","created_at":"2026-07-05T03:45:42Z","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":"ab1842654d91b5305cca91f0b3f2226c20ce003e5195fc99ce133a4ea37b3eab","cross_cats_sorted":["astro-ph.GA","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.SR","submitted_at":"2021-09-07T15:40:09Z","title_canon_sha256":"250d368ba36ae0ce1303653fb3787a9497825e247e56fff476f2378f6590107c"},"schema_version":"1.0","source":{"id":"2109.03149","kind":"arxiv","version":1}},"canonical_sha256":"e7b1720ebb15a6e1ee806a1e0d205d6e128f27c76a06119863619a02aae70245","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e7b1720ebb15a6e1ee806a1e0d205d6e128f27c76a06119863619a02aae70245","first_computed_at":"2026-07-05T03:45:42.624800Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:45:42.624800Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aoiMChHpBtnewESQcrmzbcV7Y3vwcpihhjdf+KugHmFFtdO022gu9ZZt75V5T7sAlxsbSFTCOZuX3TmQETZ9BA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:45:42.625199Z","signed_message":"canonical_sha256_bytes"},"source_id":"2109.03149","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a3df11e3b852fb25704295b30de51018d3ca0a458ef3063ea3b2d5aced651e40","sha256:092b1dd9a6095ff2184c25a27c16e69c760aa4307c5a21060caf16429bc8cfd4"],"state_sha256":"e57e49ee33041307b2e26a117e161905cc306e72f4c5e07fec1c9cb6fcce0961"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TOPabXaAFzZ9VmHj9tV7gdBrnunY5jhW1DIxRX8CnV6GaXxOmqNAr1nxgDFrCxrG45lqEJpRSG4nAgOl2GJ2Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T17:15:16.564446Z","bundle_sha256":"e520eea4e5d6648b807df90dce3e9a947f8bd41811dd6e7265386acf0f18d6d0"}}