{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:G6C32UYOP5EBIVXUG5D6Q7SPZ5","short_pith_number":"pith:G6C32UYO","canonical_record":{"source":{"id":"1301.7044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-29T20:15:52Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ec0c59b404a1d575bba5a08ceb2884b57b49a2e2139d19f388f6347ac20b12b6","abstract_canon_sha256":"e49f58976dfe7b1824e4b45466021373b33e09688b60db6fa7ef16d7bfb65a58"},"schema_version":"1.0"},"canonical_sha256":"3785bd530e7f481456f43747e87e4fcf4918cee7caf03b1602591fdd01c8e69d","source":{"kind":"arxiv","id":"1301.7044","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.7044","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"arxiv_version","alias_value":"1301.7044v1","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.7044","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"pith_short_12","alias_value":"G6C32UYOP5EB","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G6C32UYOP5EBIVXU","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G6C32UYO","created_at":"2026-05-18T12:27:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:G6C32UYOP5EBIVXUG5D6Q7SPZ5","target":"record","payload":{"canonical_record":{"source":{"id":"1301.7044","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-29T20:15:52Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"ec0c59b404a1d575bba5a08ceb2884b57b49a2e2139d19f388f6347ac20b12b6","abstract_canon_sha256":"e49f58976dfe7b1824e4b45466021373b33e09688b60db6fa7ef16d7bfb65a58"},"schema_version":"1.0"},"canonical_sha256":"3785bd530e7f481456f43747e87e4fcf4918cee7caf03b1602591fdd01c8e69d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:57.398185Z","signature_b64":"6hwZNM+ywTv+mgamQGz8o96+nDU2Zyqxd8MtlUhrvnJZjKfmUSkZYptDwXRuxwIId2RtGhePG5HLNcqx3D9UAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3785bd530e7f481456f43747e87e4fcf4918cee7caf03b1602591fdd01c8e69d","last_reissued_at":"2026-05-18T01:51:57.397597Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:57.397597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1301.7044","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":"2026-05-18T01:51:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NJjJoleiEuZBYlm4HOJ+5PJnet2LYRzN1fAzYLZseQwCdS14F2NzDn5gxB7N3ObQYASkl26shi9hZ1VQQigVAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:11:47.729008Z"},"content_sha256":"2432e8952c6b4b2b7a1d325a6ebc99f94d0857810098222640b05e07d3d82fce","schema_version":"1.0","event_id":"sha256:2432e8952c6b4b2b7a1d325a6ebc99f94d0857810098222640b05e07d3d82fce"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:G6C32UYOP5EBIVXUG5D6Q7SPZ5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A WFC3/HST view of the three stellar populations in the Globular Cluster NGC6752","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Aparicio, A. Bellini, A. F. Marino, A. P. Milone, D. Yong, F. D'Antona, F. Grundahl, G. Piotto, J. Anderson, L. R. Bedin, M. Monelli, S. Cassisi","submitted_at":"2013-01-29T20:15:52Z","abstract_excerpt":"Multi-band Hubble Space Telescope photometry reveals that the main sequence, sub-giant, and the red giant branch of the globular cluster NGC6752 splits into three main components in close analogy with the three distinct segments along its horizontal branch stars. These triple sequences are consistent with three stellar groups: a stellar population with a chemical composition similar to field halo stars (population a), a population (c) with enhanced sodium and nitrogen, depleted carbon and oxygen and enhanced helium abundance (Delta Y ~0.03), and a population (b) with an intermediate (between p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.7044","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":"2026-05-18T01:51:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H3L/Y+JAG6bAnln+NZo10BNkqCfm+T29sZpeoNZVEXhzoS9RqCbR9N4BNYlis1e+Nkl/KxgdZJTIl+x1ygnEDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T03:11:47.729627Z"},"content_sha256":"70e721312d8f335f9c29127e7d1fc525c0730db1309963d20a353cedd653d9b8","schema_version":"1.0","event_id":"sha256:70e721312d8f335f9c29127e7d1fc525c0730db1309963d20a353cedd653d9b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/bundle.json","state_url":"https://pith.science/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/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":"2026-05-28T03:11:47Z","links":{"resolver":"https://pith.science/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5","bundle":"https://pith.science/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/bundle.json","state":"https://pith.science/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G6C32UYOP5EBIVXUG5D6Q7SPZ5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:G6C32UYOP5EBIVXUG5D6Q7SPZ5","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":"e49f58976dfe7b1824e4b45466021373b33e09688b60db6fa7ef16d7bfb65a58","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-29T20:15:52Z","title_canon_sha256":"ec0c59b404a1d575bba5a08ceb2884b57b49a2e2139d19f388f6347ac20b12b6"},"schema_version":"1.0","source":{"id":"1301.7044","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1301.7044","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"arxiv_version","alias_value":"1301.7044v1","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1301.7044","created_at":"2026-05-18T01:51:57Z"},{"alias_kind":"pith_short_12","alias_value":"G6C32UYOP5EB","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_16","alias_value":"G6C32UYOP5EBIVXU","created_at":"2026-05-18T12:27:45Z"},{"alias_kind":"pith_short_8","alias_value":"G6C32UYO","created_at":"2026-05-18T12:27:45Z"}],"graph_snapshots":[{"event_id":"sha256:70e721312d8f335f9c29127e7d1fc525c0730db1309963d20a353cedd653d9b8","target":"graph","created_at":"2026-05-18T01:51:57Z","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":"Multi-band Hubble Space Telescope photometry reveals that the main sequence, sub-giant, and the red giant branch of the globular cluster NGC6752 splits into three main components in close analogy with the three distinct segments along its horizontal branch stars. These triple sequences are consistent with three stellar groups: a stellar population with a chemical composition similar to field halo stars (population a), a population (c) with enhanced sodium and nitrogen, depleted carbon and oxygen and enhanced helium abundance (Delta Y ~0.03), and a population (b) with an intermediate (between p","authors_text":"A. Aparicio, A. Bellini, A. F. Marino, A. P. Milone, D. Yong, F. D'Antona, F. Grundahl, G. Piotto, J. Anderson, L. R. Bedin, M. Monelli, S. Cassisi","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-29T20:15:52Z","title":"A WFC3/HST view of the three stellar populations in the Globular Cluster NGC6752"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.7044","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":"sha256:2432e8952c6b4b2b7a1d325a6ebc99f94d0857810098222640b05e07d3d82fce","target":"record","created_at":"2026-05-18T01:51:57Z","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":"e49f58976dfe7b1824e4b45466021373b33e09688b60db6fa7ef16d7bfb65a58","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2013-01-29T20:15:52Z","title_canon_sha256":"ec0c59b404a1d575bba5a08ceb2884b57b49a2e2139d19f388f6347ac20b12b6"},"schema_version":"1.0","source":{"id":"1301.7044","kind":"arxiv","version":1}},"canonical_sha256":"3785bd530e7f481456f43747e87e4fcf4918cee7caf03b1602591fdd01c8e69d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3785bd530e7f481456f43747e87e4fcf4918cee7caf03b1602591fdd01c8e69d","first_computed_at":"2026-05-18T01:51:57.397597Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:57.397597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6hwZNM+ywTv+mgamQGz8o96+nDU2Zyqxd8MtlUhrvnJZjKfmUSkZYptDwXRuxwIId2RtGhePG5HLNcqx3D9UAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:57.398185Z","signed_message":"canonical_sha256_bytes"},"source_id":"1301.7044","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2432e8952c6b4b2b7a1d325a6ebc99f94d0857810098222640b05e07d3d82fce","sha256:70e721312d8f335f9c29127e7d1fc525c0730db1309963d20a353cedd653d9b8"],"state_sha256":"19ca912ed346c62312355b49a4e13020c7ea7eef4bea9ce2803a7a993c526b2f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t2g7JkE2/HpUimSWYl32S8Uxf45g9okFxa9pf/Q90Vh6n/MRIHW+9cfNaKldN3zZuBG0YubcgqUBth5NvHfnAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T03:11:47.732598Z","bundle_sha256":"d21609ba386fe04f046399dddc4627011248aa3bb992fe99929f88cc1b6bab38"}}