{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:T62UODDTL3O7QQLVYUVWYFPKDE","short_pith_number":"pith:T62UODDT","canonical_record":{"source":{"id":"1908.11702","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-30T12:49:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"52ea1fee6411753b5c2c49bfd9a142f2f0c1b97099a702a275e40b57bb60c116","abstract_canon_sha256":"e89881aa9f10599d2d52d01486d5aaa234282d92e6f40c36900cd437d0dad2eb"},"schema_version":"1.0"},"canonical_sha256":"9fb5470c735eddf84175c52b6c15ea1902b1fee927c6f51f204e30f4e376a364","source":{"kind":"arxiv","id":"1908.11702","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11702","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11702v1","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11702","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_12","alias_value":"T62UODDTL3O7","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_16","alias_value":"T62UODDTL3O7QQLV","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_8","alias_value":"T62UODDT","created_at":"2026-07-05T00:48:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:T62UODDTL3O7QQLVYUVWYFPKDE","target":"record","payload":{"canonical_record":{"source":{"id":"1908.11702","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-30T12:49:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"52ea1fee6411753b5c2c49bfd9a142f2f0c1b97099a702a275e40b57bb60c116","abstract_canon_sha256":"e89881aa9f10599d2d52d01486d5aaa234282d92e6f40c36900cd437d0dad2eb"},"schema_version":"1.0"},"canonical_sha256":"9fb5470c735eddf84175c52b6c15ea1902b1fee927c6f51f204e30f4e376a364","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:48:18.219829Z","signature_b64":"8RQV18RZXYs2zUM3t29hXkY9ObLPLXG/hA7TNMgan7FbTozrlVzwiKOjHMR5VaThsQP6HJBo4lkb+W6eDxemAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fb5470c735eddf84175c52b6c15ea1902b1fee927c6f51f204e30f4e376a364","last_reissued_at":"2026-07-05T00:48:18.219359Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:48:18.219359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.11702","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":"2026-07-05T00:48:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6SUTr8dTu+WtXNDVr8qIIV3j938C4/pQtubSgEEWn6+8tnok198IplGDaZ6+HBWrIyetiWw8qQU1daqJ8I64Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:23:23.019633Z"},"content_sha256":"e55c2aceedd92870621dd2d9b5702ae2bd52c17087c6918dbd7162871742997b","schema_version":"1.0","event_id":"sha256:e55c2aceedd92870621dd2d9b5702ae2bd52c17087c6918dbd7162871742997b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:T62UODDTL3O7QQLVYUVWYFPKDE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Helium variations in Galactic and extragalactic Globular Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Dotter, A. Marino, A. Milone, E. P. Lagioia, G. Cordoni, M. Tailo","submitted_at":"2019-08-30T12:49:18Z","abstract_excerpt":"The recent measurements of internal variations of helium in Galactic and extragalactic Globular Clusters (GCs) set binding constraints to the models of formation of Multiple Populations (MPs) in GCs, and gave rise, at the same time, to crucial questions related with the influence of the environment on MP formation as well as with the role played by GCs in the early galactic formation. We present the most recent estimates of helium enrichment in the main populations of a large sample of Galactic and extragalactic GCs."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11702","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/1908.11702/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":"2026-07-05T00:48:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UqX0HVWPecq0p2PYjjgV8wH4N9Y9VmHfn3IGSPdC1sNMN7ig2iRpPofTIqIi+6rxgU43LfwJBaYtU+eKbQouAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T09:23:23.020476Z"},"content_sha256":"6f1211ca4b534eebd34227e0a04512392cd8322233bd44dec48e1633a80bee48","schema_version":"1.0","event_id":"sha256:6f1211ca4b534eebd34227e0a04512392cd8322233bd44dec48e1633a80bee48"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T62UODDTL3O7QQLVYUVWYFPKDE/bundle.json","state_url":"https://pith.science/pith/T62UODDTL3O7QQLVYUVWYFPKDE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T62UODDTL3O7QQLVYUVWYFPKDE/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":"2026-08-06T09:23:23Z","links":{"resolver":"https://pith.science/pith/T62UODDTL3O7QQLVYUVWYFPKDE","bundle":"https://pith.science/pith/T62UODDTL3O7QQLVYUVWYFPKDE/bundle.json","state":"https://pith.science/pith/T62UODDTL3O7QQLVYUVWYFPKDE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T62UODDTL3O7QQLVYUVWYFPKDE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:T62UODDTL3O7QQLVYUVWYFPKDE","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":"e89881aa9f10599d2d52d01486d5aaa234282d92e6f40c36900cd437d0dad2eb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-30T12:49:18Z","title_canon_sha256":"52ea1fee6411753b5c2c49bfd9a142f2f0c1b97099a702a275e40b57bb60c116"},"schema_version":"1.0","source":{"id":"1908.11702","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.11702","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"arxiv_version","alias_value":"1908.11702v1","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.11702","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_12","alias_value":"T62UODDTL3O7","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_16","alias_value":"T62UODDTL3O7QQLV","created_at":"2026-07-05T00:48:18Z"},{"alias_kind":"pith_short_8","alias_value":"T62UODDT","created_at":"2026-07-05T00:48:18Z"}],"graph_snapshots":[{"event_id":"sha256:6f1211ca4b534eebd34227e0a04512392cd8322233bd44dec48e1633a80bee48","target":"graph","created_at":"2026-07-05T00:48:18Z","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/1908.11702/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The recent measurements of internal variations of helium in Galactic and extragalactic Globular Clusters (GCs) set binding constraints to the models of formation of Multiple Populations (MPs) in GCs, and gave rise, at the same time, to crucial questions related with the influence of the environment on MP formation as well as with the role played by GCs in the early galactic formation. We present the most recent estimates of helium enrichment in the main populations of a large sample of Galactic and extragalactic GCs.","authors_text":"A. Dotter, A. Marino, A. Milone, E. P. Lagioia, G. Cordoni, M. Tailo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-30T12:49:18Z","title":"Helium variations in Galactic and extragalactic Globular Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.11702","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:e55c2aceedd92870621dd2d9b5702ae2bd52c17087c6918dbd7162871742997b","target":"record","created_at":"2026-07-05T00:48:18Z","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":"e89881aa9f10599d2d52d01486d5aaa234282d92e6f40c36900cd437d0dad2eb","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-30T12:49:18Z","title_canon_sha256":"52ea1fee6411753b5c2c49bfd9a142f2f0c1b97099a702a275e40b57bb60c116"},"schema_version":"1.0","source":{"id":"1908.11702","kind":"arxiv","version":1}},"canonical_sha256":"9fb5470c735eddf84175c52b6c15ea1902b1fee927c6f51f204e30f4e376a364","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fb5470c735eddf84175c52b6c15ea1902b1fee927c6f51f204e30f4e376a364","first_computed_at":"2026-07-05T00:48:18.219359Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:48:18.219359Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8RQV18RZXYs2zUM3t29hXkY9ObLPLXG/hA7TNMgan7FbTozrlVzwiKOjHMR5VaThsQP6HJBo4lkb+W6eDxemAw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:48:18.219829Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.11702","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e55c2aceedd92870621dd2d9b5702ae2bd52c17087c6918dbd7162871742997b","sha256:6f1211ca4b534eebd34227e0a04512392cd8322233bd44dec48e1633a80bee48"],"state_sha256":"249fb22b84446c76644d61f2d341f3b75d865c888087184a77bb02741e8c89a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MOb5+gvqA09mjvIbfQd5J7N1gdjPsKWkezR8q2lElST5v55ppRPoIak3o52tx927N5hD/dyOgE6Q5aN60v2JCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T09:23:23.025023Z","bundle_sha256":"b802d09b878aed8d2ae6bf2dc3b8c51448ff2ce43468e71587f0e2c68cdc9b9a"}}