{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:ISGWD2MTHW7VOGKWIF4GF7B4DT","short_pith_number":"pith:ISGWD2MT","canonical_record":{"source":{"id":"1511.05714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-18T09:58:48Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a5accb99facc7d0f7babd5f728a377de4a51b48740519db11536fc1977d1dc94","abstract_canon_sha256":"f3196e2a0501aa1b86daed990958b2475aa6531e58c2c083b7e9468bd8d29a90"},"schema_version":"1.0"},"canonical_sha256":"448d61e9933dbf571956417862fc3c1cf36eab393ab30cb782bed62b1f96e2fa","source":{"kind":"arxiv","id":"1511.05714","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.05714","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"arxiv_version","alias_value":"1511.05714v1","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.05714","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"pith_short_12","alias_value":"ISGWD2MTHW7V","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"ISGWD2MTHW7VOGKW","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"ISGWD2MT","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:ISGWD2MTHW7VOGKWIF4GF7B4DT","target":"record","payload":{"canonical_record":{"source":{"id":"1511.05714","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-18T09:58:48Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"a5accb99facc7d0f7babd5f728a377de4a51b48740519db11536fc1977d1dc94","abstract_canon_sha256":"f3196e2a0501aa1b86daed990958b2475aa6531e58c2c083b7e9468bd8d29a90"},"schema_version":"1.0"},"canonical_sha256":"448d61e9933dbf571956417862fc3c1cf36eab393ab30cb782bed62b1f96e2fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:24:45.495248Z","signature_b64":"D/o7ZMq2oqjVPj08V/YovkZGdG5enhO1TI7LaW1ABRisfknNNRFoc6aaZyJEFXiqwhUmDNrWWz+ydT9ea6xCDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"448d61e9933dbf571956417862fc3c1cf36eab393ab30cb782bed62b1f96e2fa","last_reissued_at":"2026-05-18T01:24:45.494757Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:24:45.494757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.05714","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":"2026-05-18T01:24:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2JTUFr90wEP9gIA2vTLg+7ZPJC3NFBh+E9ZyJ7Hz1B+ShFEiygjDABGk5V9WBXUwpRTkT3gdb8eI/R1G1oGyDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T09:29:42.498855Z"},"content_sha256":"428be66559819c602e40aef4e466b1ba5fcf1faa8e770b087e83c973e2a7cd15","schema_version":"1.0","event_id":"sha256:428be66559819c602e40aef4e466b1ba5fcf1faa8e770b087e83c973e2a7cd15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:ISGWD2MTHW7VOGKWIF4GF7B4DT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Clear evidence for the presence of second-generation asymptotic giant branch stars in metal-poor Galactic globular clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"D. A. Garcia-Hernandez, M. Monelli, M. Shetrone, O. Zamora, P. B. Stetson, S. Cassisi, S. Lucatello, Sz. Meszaros","submitted_at":"2015-11-18T09:58:48Z","abstract_excerpt":"Galactic globular clusters (GCs) are known to host multiple stellar populations: a first generation with a chemical pattern typical of halo field stars and a second generation (SG) enriched in Na and Al and depleted in O and Mg. Both stellar generations are found at different evolutionary stages (e.g., the main-sequence turnoff, the subgiant branch, and the red giant branch). The non detection of SG asymptotic giant branch (AGB) stars in several metal-poor ([Fe/H] < -1) GCs suggests that not all SG stars ascend the AGB phase, and that failed AGB stars may be very common in metal-poor GCs. This"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.05714","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":"2026-05-18T01:24:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JHPZrYj/HhPglx1zBwgh6reqYnudXU9SDp1OsCX5nS8POPhVINx727WGYUxcNvNPzoeQ5x+hoY3Ol9y4sFCoBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T09:29:42.499214Z"},"content_sha256":"97cb2a428a142a90b08f67f71d0e2c3f0c0430280308f048fe06eaa656de0d04","schema_version":"1.0","event_id":"sha256:97cb2a428a142a90b08f67f71d0e2c3f0c0430280308f048fe06eaa656de0d04"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/bundle.json","state_url":"https://pith.science/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/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":"2026-05-20T09:29:42Z","links":{"resolver":"https://pith.science/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT","bundle":"https://pith.science/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/bundle.json","state":"https://pith.science/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ISGWD2MTHW7VOGKWIF4GF7B4DT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ISGWD2MTHW7VOGKWIF4GF7B4DT","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":"f3196e2a0501aa1b86daed990958b2475aa6531e58c2c083b7e9468bd8d29a90","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-18T09:58:48Z","title_canon_sha256":"a5accb99facc7d0f7babd5f728a377de4a51b48740519db11536fc1977d1dc94"},"schema_version":"1.0","source":{"id":"1511.05714","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.05714","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"arxiv_version","alias_value":"1511.05714v1","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.05714","created_at":"2026-05-18T01:24:45Z"},{"alias_kind":"pith_short_12","alias_value":"ISGWD2MTHW7V","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"ISGWD2MTHW7VOGKW","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"ISGWD2MT","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:97cb2a428a142a90b08f67f71d0e2c3f0c0430280308f048fe06eaa656de0d04","target":"graph","created_at":"2026-05-18T01:24:45Z","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":"Galactic globular clusters (GCs) are known to host multiple stellar populations: a first generation with a chemical pattern typical of halo field stars and a second generation (SG) enriched in Na and Al and depleted in O and Mg. Both stellar generations are found at different evolutionary stages (e.g., the main-sequence turnoff, the subgiant branch, and the red giant branch). The non detection of SG asymptotic giant branch (AGB) stars in several metal-poor ([Fe/H] < -1) GCs suggests that not all SG stars ascend the AGB phase, and that failed AGB stars may be very common in metal-poor GCs. This","authors_text":"D. A. Garcia-Hernandez, M. Monelli, M. Shetrone, O. Zamora, P. B. Stetson, S. Cassisi, S. Lucatello, Sz. Meszaros","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-18T09:58:48Z","title":"Clear evidence for the presence of second-generation asymptotic giant branch stars in metal-poor Galactic globular clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.05714","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":"sha256:428be66559819c602e40aef4e466b1ba5fcf1faa8e770b087e83c973e2a7cd15","target":"record","created_at":"2026-05-18T01:24:45Z","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":"f3196e2a0501aa1b86daed990958b2475aa6531e58c2c083b7e9468bd8d29a90","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-11-18T09:58:48Z","title_canon_sha256":"a5accb99facc7d0f7babd5f728a377de4a51b48740519db11536fc1977d1dc94"},"schema_version":"1.0","source":{"id":"1511.05714","kind":"arxiv","version":1}},"canonical_sha256":"448d61e9933dbf571956417862fc3c1cf36eab393ab30cb782bed62b1f96e2fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"448d61e9933dbf571956417862fc3c1cf36eab393ab30cb782bed62b1f96e2fa","first_computed_at":"2026-05-18T01:24:45.494757Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:24:45.494757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D/o7ZMq2oqjVPj08V/YovkZGdG5enhO1TI7LaW1ABRisfknNNRFoc6aaZyJEFXiqwhUmDNrWWz+ydT9ea6xCDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:24:45.495248Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.05714","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:428be66559819c602e40aef4e466b1ba5fcf1faa8e770b087e83c973e2a7cd15","sha256:97cb2a428a142a90b08f67f71d0e2c3f0c0430280308f048fe06eaa656de0d04"],"state_sha256":"fb4db1025e747f1c5a9ddab9c894ce128b8cb02053cc755c01d570e4c9c4adda"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tBxnWUrILWd0vf58JfWtuFO7U2cSLaljC3Q9tLs90iZhZ8EEXDRjqoLfn81eteD5iqZfuQdWh08eespFUYX0DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T09:29:42.501255Z","bundle_sha256":"2294874138fbe258e794a884b3d43c539d0ba568a6f47c5e416dbac7667a9521"}}