{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2011:2636WQQENRZQM5ZRF756UEYNC6","short_pith_number":"pith:2636WQQE","schema_version":"1.0","canonical_sha256":"d7b7eb42046c730677312ffbea130d179aaa6c150961976eeb3b9a34835ac3bf","source":{"kind":"arxiv","id":"1106.4544","version":1},"attestation_state":"computed","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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"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"},"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"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1106.4544","created_at":"2026-05-18T02:01:31.890198+00:00"},{"alias_kind":"arxiv_version","alias_value":"1106.4544v1","created_at":"2026-05-18T02:01:31.890198+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.4544","created_at":"2026-05-18T02:01:31.890198+00:00"},{"alias_kind":"pith_short_12","alias_value":"2636WQQENRZQ","created_at":"2026-05-18T12:26:18.847500+00:00"},{"alias_kind":"pith_short_16","alias_value":"2636WQQENRZQM5ZR","created_at":"2026-05-18T12:26:18.847500+00:00"},{"alias_kind":"pith_short_8","alias_value":"2636WQQE","created_at":"2026-05-18T12:26:18.847500+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6","json":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6.json","graph_json":"https://pith.science/api/pith-number/2636WQQENRZQM5ZRF756UEYNC6/graph.json","events_json":"https://pith.science/api/pith-number/2636WQQENRZQM5ZRF756UEYNC6/events.json","paper":"https://pith.science/paper/2636WQQE"},"agent_actions":{"view_html":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6","download_json":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6.json","view_paper":"https://pith.science/paper/2636WQQE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1106.4544&json=true","fetch_graph":"https://pith.science/api/pith-number/2636WQQENRZQM5ZRF756UEYNC6/graph.json","fetch_events":"https://pith.science/api/pith-number/2636WQQENRZQM5ZRF756UEYNC6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/action/storage_attestation","attest_author":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/action/author_attestation","sign_citation":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/action/citation_signature","submit_replication":"https://pith.science/pith/2636WQQENRZQM5ZRF756UEYNC6/action/replication_record"}},"created_at":"2026-05-18T02:01:31.890198+00:00","updated_at":"2026-05-18T02:01:31.890198+00:00"}