{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:2636WQQENRZQM5ZRF756UEYNC6","short_pith_number":"pith:2636WQQE","canonical_record":{"source":{"id":"1106.4544","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-22T20:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"93b3b43866ecc0c25a1e73528bd6796a79d2d31c70d6ea62d6dcb1079b455c0e","abstract_canon_sha256":"eaba64ff035fca8660cb89b285e104f33f9928037dc7ed567a5a2b200e64faee"},"schema_version":"1.0"},"canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","source":{"kind":"arxiv","id":"1106.4544","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4544","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4544v1","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4544","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"pith_short_12","alias_value":"2636WQQENRZQ","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2636WQQENRZQM5ZR","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2636WQQE","created_at":"2026-05-18T12:26:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:2636WQQENRZQM5ZRF756UEYNC6","target":"record","payload":{"canonical_record":{"source":{"id":"1106.4544","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-22T20:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"93b3b43866ecc0c25a1e73528bd6796a79d2d31c70d6ea62d6dcb1079b455c0e","abstract_canon_sha256":"eaba64ff035fca8660cb89b285e104f33f9928037dc7ed567a5a2b200e64faee"},"schema_version":"1.0"},"canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:01:31.890724Z","signature_b64":"bOyYfSkF5VunSdS7+nL6A3X/6tJheu05J5oxG5elsLIbu2VehJ2L4NeOv1SEEe09VGYJN0tkyTwKXiqNxyuYDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","last_reissued_at":"2026-05-18T02:01:31.890132Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:01:31.890132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.4544","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":"2026-05-18T02:01:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7PZveXmt3jVu65JjfGnVdkIw766BK43lz4HDg+DnAXtzzSFOdnKSjdIJez5BxXsdOUJ7hZXdhc26afIdycN+AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T08:48:54.195148Z"},"content_sha256":"ec6408108b2749313669a7be3394f39ecab3dabf63809a6e1fdbdd9c6dbf643f","schema_version":"1.0","event_id":"sha256:ec6408108b2749313669a7be3394f39ecab3dabf63809a6e1fdbdd9c6dbf643f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:2636WQQENRZQM5ZRF756UEYNC6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A differential chemical element analysis of the metal poor Globular Cluster NGC 6397","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Andreas Koch, Andrew McWilliam","submitted_at":"2011-06-22T20:00:01Z","abstract_excerpt":"We present chemical abundances in three red giants and two turn-off stars in the metal poor Galactic globular cluster (GC) NGC 6397 based on spectroscopy obtained with the MIKE high resolution spectrograph on the Magellan 6.5-m Clay telescope. Our results are based on a line-by-line differential abundance analysis relative to the well-studied red giant Arcturus and the Galactic halo field star Hip 66815. At a mean of -2.10 +/- 0.02 (stat.) +/- 0.07 (sys.) the differential iron abundance is in good agreement with other studies in the literature based on gf-values. As in previous, differential w"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4544","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":"2026-05-18T02:01:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fI7pMksWXQo6iWiY7fh8OPtr8K1OAh19w17ndc8cVEdvFqWxSRd3PARRoNcjQCyUdWJw23DPZmsv9cDG1q4qBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T08:48:54.195941Z"},"content_sha256":"df8dbeb06568ef22438072a694dfc652a782974ae3297cab8aa7503cdd8a6df7","schema_version":"1.0","event_id":"sha256:df8dbeb06568ef22438072a694dfc652a782974ae3297cab8aa7503cdd8a6df7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/bundle.json","state_url":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2636WQQENRZQM5ZRF756UEYNC6/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":"2026-06-06T08:48:54Z","links":{"resolver":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6","bundle":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/bundle.json","state":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2636WQQENRZQM5ZRF756UEYNC6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:2636WQQENRZQM5ZRF756UEYNC6","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":"eaba64ff035fca8660cb89b285e104f33f9928037dc7ed567a5a2b200e64faee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-22T20:00:01Z","title_canon_sha256":"93b3b43866ecc0c25a1e73528bd6796a79d2d31c70d6ea62d6dcb1079b455c0e"},"schema_version":"1.0","source":{"id":"1106.4544","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.4544","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"arxiv_version","alias_value":"1106.4544v1","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4544","created_at":"2026-05-18T02:01:31Z"},{"alias_kind":"pith_short_12","alias_value":"2636WQQENRZQ","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_16","alias_value":"2636WQQENRZQM5ZR","created_at":"2026-05-18T12:26:18Z"},{"alias_kind":"pith_short_8","alias_value":"2636WQQE","created_at":"2026-05-18T12:26:18Z"}],"graph_snapshots":[{"event_id":"sha256:df8dbeb06568ef22438072a694dfc652a782974ae3297cab8aa7503cdd8a6df7","target":"graph","created_at":"2026-05-18T02:01:31Z","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":"We present chemical abundances in three red giants and two turn-off stars in the metal poor Galactic globular cluster (GC) NGC 6397 based on spectroscopy obtained with the MIKE high resolution spectrograph on the Magellan 6.5-m Clay telescope. Our results are based on a line-by-line differential abundance analysis relative to the well-studied red giant Arcturus and the Galactic halo field star Hip 66815. At a mean of -2.10 +/- 0.02 (stat.) +/- 0.07 (sys.) the differential iron abundance is in good agreement with other studies in the literature based on gf-values. As in previous, differential w","authors_text":"Andreas Koch, Andrew McWilliam","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-22T20:00:01Z","title":"A differential chemical element analysis of the metal poor Globular Cluster NGC 6397"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.4544","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:ec6408108b2749313669a7be3394f39ecab3dabf63809a6e1fdbdd9c6dbf643f","target":"record","created_at":"2026-05-18T02:01:31Z","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":"eaba64ff035fca8660cb89b285e104f33f9928037dc7ed567a5a2b200e64faee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2011-06-22T20:00:01Z","title_canon_sha256":"93b3b43866ecc0c25a1e73528bd6796a79d2d31c70d6ea62d6dcb1079b455c0e"},"schema_version":"1.0","source":{"id":"1106.4544","kind":"arxiv","version":1}},"canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","first_computed_at":"2026-05-18T02:01:31.890132Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:01:31.890132Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bOyYfSkF5VunSdS7+nL6A3X/6tJheu05J5oxG5elsLIbu2VehJ2L4NeOv1SEEe09VGYJN0tkyTwKXiqNxyuYDg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:01:31.890724Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.4544","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ec6408108b2749313669a7be3394f39ecab3dabf63809a6e1fdbdd9c6dbf643f","sha256:df8dbeb06568ef22438072a694dfc652a782974ae3297cab8aa7503cdd8a6df7"],"state_sha256":"ceff4996ca47c0e1d3c83bb1db45ce33e132957edb99ef8315d6d94aab9ad030"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/WlHjmrn4cH95nAMQ9I5OxwucjdWwoEDYwhGSsyZ/jqdRGI4geZWnDeB0k+V1ELCeacnoOsNOmXLuVubdkKnCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T08:48:54.200114Z","bundle_sha256":"c9f8cc08d9973522deb59aaa8de591242bf0beb79a9c0260c87fce2a750ef710"}}