{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JKU3E57F7Z5ZRJP4IWFS2A2IZU","short_pith_number":"pith:JKU3E57F","canonical_record":{"source":{"id":"1804.06293","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-17T14:44:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"05247040a9e978acc944802b3aadfb565383e5fe009ecec406c66af9454e561b","abstract_canon_sha256":"484bfc63c42a323e0c24ab86d145b08ae8881a252487c83047ba467824314e31"},"schema_version":"1.0"},"canonical_sha256":"4aa9b277e5fe7b98a5fc458b2d0348cd37f59d65ced8f08015ff8ed271744f31","source":{"kind":"arxiv","id":"1804.06293","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06293","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06293v1","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06293","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"pith_short_12","alias_value":"JKU3E57F7Z5Z","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JKU3E57F7Z5ZRJP4","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JKU3E57F","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JKU3E57F7Z5ZRJP4IWFS2A2IZU","target":"record","payload":{"canonical_record":{"source":{"id":"1804.06293","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-17T14:44:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"05247040a9e978acc944802b3aadfb565383e5fe009ecec406c66af9454e561b","abstract_canon_sha256":"484bfc63c42a323e0c24ab86d145b08ae8881a252487c83047ba467824314e31"},"schema_version":"1.0"},"canonical_sha256":"4aa9b277e5fe7b98a5fc458b2d0348cd37f59d65ced8f08015ff8ed271744f31","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:13:26.212826Z","signature_b64":"qopvXl6pLULTC7g90ZUSW7te9uhOCDX/898E0ppSnxIIfg9rP08uKBRdW/uB7JVsgl02ZxEHeInT8RR0HODbBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4aa9b277e5fe7b98a5fc458b2d0348cd37f59d65ced8f08015ff8ed271744f31","last_reissued_at":"2026-05-18T00:13:26.212078Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:13:26.212078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.06293","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":"2026-05-18T00:13:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"atH03DVE0MOWVmZymgp1zM6oKLbbIyMjFUmUZGJIrjqFLV4FsgoGVo1nyB+8RXp/eMunhlL5eym8E2uy7y7mBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:20:13.972001Z"},"content_sha256":"988ad3159f8e88b52d56a3833222fc4583bc0728876f2491d7c752866fe39443","schema_version":"1.0","event_id":"sha256:988ad3159f8e88b52d56a3833222fc4583bc0728876f2491d7c752866fe39443"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JKU3E57F7Z5ZRJP4IWFS2A2IZU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Gaia-ESO Survey: Evidence of atomic diffusion in M67?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"A. Bayo, A. Bragaglia, A. C. Lanzafame, A. Drazdauskas, A. Hourihane, A. J. Korn, A. Pasquali, A. R. Casey, C. Bertelli Motta, C. C. Worley, C. Lardo, E. Flaccomio, E. Franciosini, E. J. Alfaro, E. K. Grebel, F. Damiani, G. Carraro, G. Gilmore, G. G. Sacco, G. Michaud, G. Tautvai\\v{s}ien\\.e, J. Lewis, J. Richer, L. Magrini, L. Monaco, L. Morbidelli, M. Salaris, M. T. Costado, P. Jofr\\'e, R. Smiljanic, S. Blanco-Cuaresma, S. E. Koposov, S. G. Sousa, S. Martell, S. Randich, S. Zaggia, T. Bensby, U. Heiter, V. Adibekyan, X. Fu","submitted_at":"2018-04-17T14:44:01Z","abstract_excerpt":"Investigating the chemical homogeneity of stars born from the same molecular cloud at virtually the same time is very important for our understanding of the chemical enrichment of the interstellar medium and with it the chemical evolution of the Galaxy. One major cause of inhomogeneities in the abundances of open clusters is stellar evolution of the cluster members. In this work, we investigate variations in the surface chemical composition of member stars of the old open cluster M67 as a possible consequence of atomic diffusion effects taking place during the main-sequence phase. The abundanc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06293","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":"2026-05-18T00:13:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v9i12jQw83e8Ohao8ig67vm/OmUuzVKkWYqOy/cxJ5Iprhc1vXQXIQNCCVzJl8NT9Bh9OU+U1A3YqxNOcUtOBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T04:20:13.972712Z"},"content_sha256":"c61dd1731f7d941e46b936706a340e352f9b678e0c7c0e31c01b3d4e81be1fc5","schema_version":"1.0","event_id":"sha256:c61dd1731f7d941e46b936706a340e352f9b678e0c7c0e31c01b3d4e81be1fc5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/bundle.json","state_url":"https://pith.science/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/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":"2026-05-25T04:20:13Z","links":{"resolver":"https://pith.science/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU","bundle":"https://pith.science/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/bundle.json","state":"https://pith.science/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JKU3E57F7Z5ZRJP4IWFS2A2IZU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JKU3E57F7Z5ZRJP4IWFS2A2IZU","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":"484bfc63c42a323e0c24ab86d145b08ae8881a252487c83047ba467824314e31","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-17T14:44:01Z","title_canon_sha256":"05247040a9e978acc944802b3aadfb565383e5fe009ecec406c66af9454e561b"},"schema_version":"1.0","source":{"id":"1804.06293","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.06293","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"arxiv_version","alias_value":"1804.06293v1","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.06293","created_at":"2026-05-18T00:13:26Z"},{"alias_kind":"pith_short_12","alias_value":"JKU3E57F7Z5Z","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JKU3E57F7Z5ZRJP4","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JKU3E57F","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:c61dd1731f7d941e46b936706a340e352f9b678e0c7c0e31c01b3d4e81be1fc5","target":"graph","created_at":"2026-05-18T00:13:26Z","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":"Investigating the chemical homogeneity of stars born from the same molecular cloud at virtually the same time is very important for our understanding of the chemical enrichment of the interstellar medium and with it the chemical evolution of the Galaxy. One major cause of inhomogeneities in the abundances of open clusters is stellar evolution of the cluster members. In this work, we investigate variations in the surface chemical composition of member stars of the old open cluster M67 as a possible consequence of atomic diffusion effects taking place during the main-sequence phase. The abundanc","authors_text":"A. Bayo, A. Bragaglia, A. C. Lanzafame, A. Drazdauskas, A. Hourihane, A. J. Korn, A. Pasquali, A. R. Casey, C. Bertelli Motta, C. C. Worley, C. Lardo, E. Flaccomio, E. Franciosini, E. J. Alfaro, E. K. Grebel, F. Damiani, G. Carraro, G. Gilmore, G. G. Sacco, G. Michaud, G. Tautvai\\v{s}ien\\.e, J. Lewis, J. Richer, L. Magrini, L. Monaco, L. Morbidelli, M. Salaris, M. T. Costado, P. Jofr\\'e, R. Smiljanic, S. Blanco-Cuaresma, S. E. Koposov, S. G. Sousa, S. Martell, S. Randich, S. Zaggia, T. Bensby, U. Heiter, V. Adibekyan, X. Fu","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-17T14:44:01Z","title":"The Gaia-ESO Survey: Evidence of atomic diffusion in M67?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.06293","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":"sha256:988ad3159f8e88b52d56a3833222fc4583bc0728876f2491d7c752866fe39443","target":"record","created_at":"2026-05-18T00:13:26Z","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":"484bfc63c42a323e0c24ab86d145b08ae8881a252487c83047ba467824314e31","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2018-04-17T14:44:01Z","title_canon_sha256":"05247040a9e978acc944802b3aadfb565383e5fe009ecec406c66af9454e561b"},"schema_version":"1.0","source":{"id":"1804.06293","kind":"arxiv","version":1}},"canonical_sha256":"4aa9b277e5fe7b98a5fc458b2d0348cd37f59d65ced8f08015ff8ed271744f31","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4aa9b277e5fe7b98a5fc458b2d0348cd37f59d65ced8f08015ff8ed271744f31","first_computed_at":"2026-05-18T00:13:26.212078Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:13:26.212078Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qopvXl6pLULTC7g90ZUSW7te9uhOCDX/898E0ppSnxIIfg9rP08uKBRdW/uB7JVsgl02ZxEHeInT8RR0HODbBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:13:26.212826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.06293","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:988ad3159f8e88b52d56a3833222fc4583bc0728876f2491d7c752866fe39443","sha256:c61dd1731f7d941e46b936706a340e352f9b678e0c7c0e31c01b3d4e81be1fc5"],"state_sha256":"e9f046b289fe3cc8bb7dfd20d284f20170f244ba167b6b88c287b79c27b93a5e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e9whVsyk5+kG7aF1pBAXMtWTPT1EmsmMCWZ9qJgy8Vj011H0Nj/oMCA+GIOmGgD7XNiMJTADlQ+jXxMoVkQBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T04:20:13.976613Z","bundle_sha256":"c2242e15407a33ceb44fc3aa3508ae1b3b1935d030fcd8cf310186ffcb3b8884"}}