{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:DIT7K4FDGBNIJSHEHM5ZAPSVNL","short_pith_number":"pith:DIT7K4FD","canonical_record":{"source":{"id":"1411.3175","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-12T13:50:11Z","cross_cats_sorted":[],"title_canon_sha256":"57a8a0451e796ee8d3dfcadbf1367aa0c31a51c5d0a195f91b27fbe978938947","abstract_canon_sha256":"217ea1b103236b33d7d52320ead7be2fb991549c4d6037d4754737098e4813d6"},"schema_version":"1.0"},"canonical_sha256":"1a27f570a3305a84c8e43b3b903e556ae972d7d04b13736e9430082120fc5d7a","source":{"kind":"arxiv","id":"1411.3175","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.3175","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"arxiv_version","alias_value":"1411.3175v1","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.3175","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"pith_short_12","alias_value":"DIT7K4FDGBNI","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DIT7K4FDGBNIJSHE","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DIT7K4FD","created_at":"2026-05-18T12:28:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:DIT7K4FDGBNIJSHEHM5ZAPSVNL","target":"record","payload":{"canonical_record":{"source":{"id":"1411.3175","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-12T13:50:11Z","cross_cats_sorted":[],"title_canon_sha256":"57a8a0451e796ee8d3dfcadbf1367aa0c31a51c5d0a195f91b27fbe978938947","abstract_canon_sha256":"217ea1b103236b33d7d52320ead7be2fb991549c4d6037d4754737098e4813d6"},"schema_version":"1.0"},"canonical_sha256":"1a27f570a3305a84c8e43b3b903e556ae972d7d04b13736e9430082120fc5d7a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:31.276548Z","signature_b64":"/ZJqW6Q9ZyerDXuu+Iv10C4axG3intCBZdqQua5ENKbCEGQ1nhl6QT+KhqNy0+Qlc+U2zIZTzJaduakmlzyOCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1a27f570a3305a84c8e43b3b903e556ae972d7d04b13736e9430082120fc5d7a","last_reissued_at":"2026-05-18T01:41:31.275845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:31.275845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1411.3175","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":"2026-05-18T01:41:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pABHzzcyjd83a1JrqRKcgJuhnX/4klIc9i+Hns6yvfdU98gs1tFF2AaaUDQTeyUUHact/OxzpWSJozNGqBL+BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:55:11.171415Z"},"content_sha256":"86393ed9909d302f3ee874003b618a69224dc6435b1f39aa31a23e797336db10","schema_version":"1.0","event_id":"sha256:86393ed9909d302f3ee874003b618a69224dc6435b1f39aa31a23e797336db10"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:DIT7K4FDGBNIJSHEHM5ZAPSVNL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spectral Energy Distributions and Masses of 304 M31 Old Star Clusters","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Beijing, China), Chinese Academy of Sciences, Cuihua Du, Hu Zou, Jianghua Wu, Jundan Nie, Jun Ma (1), National Astronomical Observatories, Qirong Yuan ((1) Key Laboratory of Optical Astronomy, Song Wang, Tianmeng Zhang, Xu Zhou, Zhenyu Wu, Zhiming Zhou","submitted_at":"2014-11-12T13:50:11Z","abstract_excerpt":"This paper presents CCD multicolor photometry for 304 old star clusters in the nearby spiral galaxy M31. Of which photometry of 55 star clusters is first obtained. The observations were carried out as a part of the Beijing--Arizona--Taiwan--Connecticut (BATC) Multicolor Sky Survey from 1995 February to 2008 March, using 15 intermediate-band filters covering 3000--10000 \\AA. Detailed comparisons show that our photometry is in agreement with previous measurements. Based on the ages and metallicities from Caldwell et al. and the photometric measurements here, we estimated the clusters' masses by "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3175","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":""},"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":"2026-05-18T01:41:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LvPtNkIqs/JXprpMS+eGC0s2N8RociTJVsH5+rrIm2FhqM2jU2z1t4aMR/yhLCSzHTSpBoFq3ZAdf9pw40BPDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:55:11.171994Z"},"content_sha256":"5208696124c436a623c6884d6b14c6047cf89e2f32bc0bb5387ced4fad53d068","schema_version":"1.0","event_id":"sha256:5208696124c436a623c6884d6b14c6047cf89e2f32bc0bb5387ced4fad53d068"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/bundle.json","state_url":"https://pith.science/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/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":"2026-05-31T23:55:11Z","links":{"resolver":"https://pith.science/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL","bundle":"https://pith.science/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/bundle.json","state":"https://pith.science/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DIT7K4FDGBNIJSHEHM5ZAPSVNL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:DIT7K4FDGBNIJSHEHM5ZAPSVNL","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":"217ea1b103236b33d7d52320ead7be2fb991549c4d6037d4754737098e4813d6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-12T13:50:11Z","title_canon_sha256":"57a8a0451e796ee8d3dfcadbf1367aa0c31a51c5d0a195f91b27fbe978938947"},"schema_version":"1.0","source":{"id":"1411.3175","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1411.3175","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"arxiv_version","alias_value":"1411.3175v1","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1411.3175","created_at":"2026-05-18T01:41:31Z"},{"alias_kind":"pith_short_12","alias_value":"DIT7K4FDGBNI","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_16","alias_value":"DIT7K4FDGBNIJSHE","created_at":"2026-05-18T12:28:25Z"},{"alias_kind":"pith_short_8","alias_value":"DIT7K4FD","created_at":"2026-05-18T12:28:25Z"}],"graph_snapshots":[{"event_id":"sha256:5208696124c436a623c6884d6b14c6047cf89e2f32bc0bb5387ced4fad53d068","target":"graph","created_at":"2026-05-18T01:41:31Z","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":"This paper presents CCD multicolor photometry for 304 old star clusters in the nearby spiral galaxy M31. Of which photometry of 55 star clusters is first obtained. The observations were carried out as a part of the Beijing--Arizona--Taiwan--Connecticut (BATC) Multicolor Sky Survey from 1995 February to 2008 March, using 15 intermediate-band filters covering 3000--10000 \\AA. Detailed comparisons show that our photometry is in agreement with previous measurements. Based on the ages and metallicities from Caldwell et al. and the photometric measurements here, we estimated the clusters' masses by ","authors_text":"Beijing, China), Chinese Academy of Sciences, Cuihua Du, Hu Zou, Jianghua Wu, Jundan Nie, Jun Ma (1), National Astronomical Observatories, Qirong Yuan ((1) Key Laboratory of Optical Astronomy, Song Wang, Tianmeng Zhang, Xu Zhou, Zhenyu Wu, Zhiming Zhou","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-12T13:50:11Z","title":"Spectral Energy Distributions and Masses of 304 M31 Old Star Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1411.3175","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":"sha256:86393ed9909d302f3ee874003b618a69224dc6435b1f39aa31a23e797336db10","target":"record","created_at":"2026-05-18T01:41:31Z","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":"217ea1b103236b33d7d52320ead7be2fb991549c4d6037d4754737098e4813d6","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-11-12T13:50:11Z","title_canon_sha256":"57a8a0451e796ee8d3dfcadbf1367aa0c31a51c5d0a195f91b27fbe978938947"},"schema_version":"1.0","source":{"id":"1411.3175","kind":"arxiv","version":1}},"canonical_sha256":"1a27f570a3305a84c8e43b3b903e556ae972d7d04b13736e9430082120fc5d7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1a27f570a3305a84c8e43b3b903e556ae972d7d04b13736e9430082120fc5d7a","first_computed_at":"2026-05-18T01:41:31.275845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:31.275845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ZJqW6Q9ZyerDXuu+Iv10C4axG3intCBZdqQua5ENKbCEGQ1nhl6QT+KhqNy0+Qlc+U2zIZTzJaduakmlzyOCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:31.276548Z","signed_message":"canonical_sha256_bytes"},"source_id":"1411.3175","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:86393ed9909d302f3ee874003b618a69224dc6435b1f39aa31a23e797336db10","sha256:5208696124c436a623c6884d6b14c6047cf89e2f32bc0bb5387ced4fad53d068"],"state_sha256":"2eca3533fa4d7aa8cea49a544ceff881adc8b204c6f6bf0c2bfc0692445b0781"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6iO1zcyXVqWlEJwujXPg5e99Dzj//7b0k+GDDiME8ABMKYTIZV+lms8oZVLIvTZJxYzm2TWMkPn1wYRclVVMDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T23:55:11.175920Z","bundle_sha256":"b0c3016a008f9371faa57db7cf483bce25748e19a45f420e2f8cc774b5cde24e"}}