{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:LKSPVN2SPU2NU7KPL4HM4JF26V","short_pith_number":"pith:LKSPVN2S","canonical_record":{"source":{"id":"2607.14066","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-15T17:36:45Z","cross_cats_sorted":[],"title_canon_sha256":"426f1e1d34560e836d785052dfda5498c388294055a08a2ed4709e44df85aa51","abstract_canon_sha256":"8725d25180e6c6aec05831dc8c3bc4bd2bdafa39c17e4d7c994512592f9960e1"},"schema_version":"1.0"},"canonical_sha256":"5aa4fab7527d34da7d4f5f0ece24baf55890ce6c307457b32b97a126c3707acd","source":{"kind":"arxiv","id":"2607.14066","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.14066","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"2607.14066v1","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.14066","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"LKSPVN2SPU2N","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_16","alias_value":"LKSPVN2SPU2NU7KP","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_8","alias_value":"LKSPVN2S","created_at":"2026-07-16T01:23:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:LKSPVN2SPU2NU7KPL4HM4JF26V","target":"record","payload":{"canonical_record":{"source":{"id":"2607.14066","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-15T17:36:45Z","cross_cats_sorted":[],"title_canon_sha256":"426f1e1d34560e836d785052dfda5498c388294055a08a2ed4709e44df85aa51","abstract_canon_sha256":"8725d25180e6c6aec05831dc8c3bc4bd2bdafa39c17e4d7c994512592f9960e1"},"schema_version":"1.0"},"canonical_sha256":"5aa4fab7527d34da7d4f5f0ece24baf55890ce6c307457b32b97a126c3707acd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-16T01:23:22.770012Z","signature_b64":"CZkh8KZlTI9J6ar2sM28pNGojo1KGLYJ13wT2ao+prGo4VqwCtDdfwbeCTSLuvdvXCq3Z1HeDtqxuvMl3+TIAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5aa4fab7527d34da7d4f5f0ece24baf55890ce6c307457b32b97a126c3707acd","last_reissued_at":"2026-07-16T01:23:22.769223Z","signature_status":"signed_v1","first_computed_at":"2026-07-16T01:23:22.769223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.14066","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":"2026-07-16T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pRBEDXgdwJ7KSq9FgF/ZLq/Hq1qABw4YzEtQdjLP2PUmxmX2VvTeWr3mGAhMsCMghiEkZ1plHV0OhFW0CPd5Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T16:00:25.198331Z"},"content_sha256":"63bc5b1d8ced72220c2aac2045578b5dc2f40e3a25689f3eb646a385f4076a72","schema_version":"1.0","event_id":"sha256:63bc5b1d8ced72220c2aac2045578b5dc2f40e3a25689f3eb646a385f4076a72"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:LKSPVN2SPU2NU7KPL4HM4JF26V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The complex stellar system M 22: constraining the chemical enrichment from AGB stars using magnesium isotope ratios","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. F. Marino, A. I. Karakas, A. Mura-Guzm\\'an, A. P. Milone, D. Yong, E. Wang, M. Carlos, M. McKenzie, S. Martell, S. Monty, T. Nordlander","submitted_at":"2026-07-15T17:36:45Z","abstract_excerpt":"The complex star cluster M 22 (NGC 6656) provides a unique opportunity for studying slow neutron-capture (s-process) nucleosynthesis at low metallicity due to its two stellar groups with distinct iron-peak and neutron-capture element abundances. Previous studies attribute these abundance differences to pollution from 3-6 solar-mass asymptotic giant branch (AGB) stars, which produce significant quantities of the neutron-rich Mg isotopes 25Mg and 26Mg. We report the first-ever measurements of Mg isotopic abundance ratios at [Fe/H] approximately -2 in a globular-cluster-like system using very hig"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.14066","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/2607.14066/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":"2026-07-16T01:23:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DtbCay2lrULPV+N/a/3m8YGiVG46JLGiyB0EJRuDlHy/ZDAwSnriCqspiEpjHRS9O4RFI4V9mOdgUcFwB30tDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-02T16:00:25.198819Z"},"content_sha256":"2407ae6b4303cfafddf3edac79f705180294392ef270c241e33171ae017d6bc2","schema_version":"1.0","event_id":"sha256:2407ae6b4303cfafddf3edac79f705180294392ef270c241e33171ae017d6bc2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/bundle.json","state_url":"https://pith.science/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/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":"2026-08-02T16:00:25Z","links":{"resolver":"https://pith.science/pith/LKSPVN2SPU2NU7KPL4HM4JF26V","bundle":"https://pith.science/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/bundle.json","state":"https://pith.science/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LKSPVN2SPU2NU7KPL4HM4JF26V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:LKSPVN2SPU2NU7KPL4HM4JF26V","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":"8725d25180e6c6aec05831dc8c3bc4bd2bdafa39c17e4d7c994512592f9960e1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-15T17:36:45Z","title_canon_sha256":"426f1e1d34560e836d785052dfda5498c388294055a08a2ed4709e44df85aa51"},"schema_version":"1.0","source":{"id":"2607.14066","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.14066","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"arxiv_version","alias_value":"2607.14066v1","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.14066","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_12","alias_value":"LKSPVN2SPU2N","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_16","alias_value":"LKSPVN2SPU2NU7KP","created_at":"2026-07-16T01:23:22Z"},{"alias_kind":"pith_short_8","alias_value":"LKSPVN2S","created_at":"2026-07-16T01:23:22Z"}],"graph_snapshots":[{"event_id":"sha256:2407ae6b4303cfafddf3edac79f705180294392ef270c241e33171ae017d6bc2","target":"graph","created_at":"2026-07-16T01:23:22Z","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/2607.14066/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The complex star cluster M 22 (NGC 6656) provides a unique opportunity for studying slow neutron-capture (s-process) nucleosynthesis at low metallicity due to its two stellar groups with distinct iron-peak and neutron-capture element abundances. Previous studies attribute these abundance differences to pollution from 3-6 solar-mass asymptotic giant branch (AGB) stars, which produce significant quantities of the neutron-rich Mg isotopes 25Mg and 26Mg. We report the first-ever measurements of Mg isotopic abundance ratios at [Fe/H] approximately -2 in a globular-cluster-like system using very hig","authors_text":"A. F. Marino, A. I. Karakas, A. Mura-Guzm\\'an, A. P. Milone, D. Yong, E. Wang, M. Carlos, M. McKenzie, S. Martell, S. Monty, T. Nordlander","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-15T17:36:45Z","title":"The complex stellar system M 22: constraining the chemical enrichment from AGB stars using magnesium isotope ratios"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.14066","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":"sha256:63bc5b1d8ced72220c2aac2045578b5dc2f40e3a25689f3eb646a385f4076a72","target":"record","created_at":"2026-07-16T01:23:22Z","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":"8725d25180e6c6aec05831dc8c3bc4bd2bdafa39c17e4d7c994512592f9960e1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-07-15T17:36:45Z","title_canon_sha256":"426f1e1d34560e836d785052dfda5498c388294055a08a2ed4709e44df85aa51"},"schema_version":"1.0","source":{"id":"2607.14066","kind":"arxiv","version":1}},"canonical_sha256":"5aa4fab7527d34da7d4f5f0ece24baf55890ce6c307457b32b97a126c3707acd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5aa4fab7527d34da7d4f5f0ece24baf55890ce6c307457b32b97a126c3707acd","first_computed_at":"2026-07-16T01:23:22.769223Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-16T01:23:22.769223Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CZkh8KZlTI9J6ar2sM28pNGojo1KGLYJ13wT2ao+prGo4VqwCtDdfwbeCTSLuvdvXCq3Z1HeDtqxuvMl3+TIAA==","signature_status":"signed_v1","signed_at":"2026-07-16T01:23:22.770012Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.14066","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63bc5b1d8ced72220c2aac2045578b5dc2f40e3a25689f3eb646a385f4076a72","sha256:2407ae6b4303cfafddf3edac79f705180294392ef270c241e33171ae017d6bc2"],"state_sha256":"1f9ed4e9c74537ad53fcd9cbcfa1a2fba66ae68424265502515bbc1ef857ea10"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S8iOEs1tLZ9GuNtfbMOKwMN3J7V9I2xxunYOv2MkT+6Hi1NpOAgSRm1gN0asvCh5GUiAQFKGgf3aPW7ydFbMCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-02T16:00:25.202079Z","bundle_sha256":"732190b8fc6184491ff183c8444b344ce7f6802ea69bda4ae1c6bf726b3e56d7"}}