{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XUYYDQVI3FMZXYGU2IRPJVBGUF","short_pith_number":"pith:XUYYDQVI","canonical_record":{"source":{"id":"1605.03408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T12:39:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5fa5d40060c2622bb4733ebe7198a668e681beb277afd5318c5f80a356312a8e","abstract_canon_sha256":"c69442de738ccfbe05ec549f42392a8322fb17a080aee3c4d4fcb832d8de0d35"},"schema_version":"1.0"},"canonical_sha256":"bd3181c2a8d9599be0d4d222f4d426a1719ea59e5e3cf771bfb590643eed1e0b","source":{"kind":"arxiv","id":"1605.03408","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03408","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03408v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03408","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"XUYYDQVI3FMZ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XUYYDQVI3FMZXYGU","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XUYYDQVI","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XUYYDQVI3FMZXYGU2IRPJVBGUF","target":"record","payload":{"canonical_record":{"source":{"id":"1605.03408","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T12:39:18Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"5fa5d40060c2622bb4733ebe7198a668e681beb277afd5318c5f80a356312a8e","abstract_canon_sha256":"c69442de738ccfbe05ec549f42392a8322fb17a080aee3c4d4fcb832d8de0d35"},"schema_version":"1.0"},"canonical_sha256":"bd3181c2a8d9599be0d4d222f4d426a1719ea59e5e3cf771bfb590643eed1e0b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:10:29.875182Z","signature_b64":"d1Wu+Q4+xg/Z/yqR4FdZVxpxgL4Y9N/o15jTgzk6DXZnSOzUTeNWSysxzXaKJM3vuJAl2GfXI0REOOGo63TMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bd3181c2a8d9599be0d4d222f4d426a1719ea59e5e3cf771bfb590643eed1e0b","last_reissued_at":"2026-05-18T01:10:29.874717Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:10:29.874717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.03408","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"anl8PrZZd04jYrXk6RrjV8GShQCSWRbFvEkCYNWFTdn/guWD/m2ua6Ay3DUtDlkn7gfo+9aPGHTOkywsoFvkBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:44:36.537605Z"},"content_sha256":"3d0703e50dc65e63e6a40c37ec856609ed5b02eb661a1e51160afede5d258f2c","schema_version":"1.0","event_id":"sha256:3d0703e50dc65e63e6a40c37ec856609ed5b02eb661a1e51160afede5d258f2c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XUYYDQVI3FMZXYGU2IRPJVBGUF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A spectroscopic study of the Globular Cluster NGC 4147","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Cristian Moni Bidin, Lorenzo Monaco, Paulina Assmann, Sandro Villanova","submitted_at":"2016-05-11T12:39:18Z","abstract_excerpt":"We present the abundance analysis for a sample of 18 red giant branch stars in the metal-poor globular cluster NGC 4147 based on medium and high resolution spectra. This is the first extensive spectroscopic study of this cluster. We derive abundances of C, N, O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Y, Ba, and Eu. We find a metallicity of [Fe/H]=-1.84+-0.02 and an alpha-enhancement of +0.38+-0.05 (errors on the mean), typical of halo globular clusters in this metallicity regime. A significant spread is observed in the abundances of light elements C, N, O, Na, and Al. In particular we found a Na-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03408","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":"2026-05-18T01:10:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+wc8E5bbCwn4O8OYYFzHeoKhwyO/SnO+aXgU7ImEE7Lh9HI6cVQWW4E+7AMA/D2Z5WDSTw4afrnHM30BETwSCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:44:36.538371Z"},"content_sha256":"cc350782069737054daac5cbeea73d24c35a8c393bf30b3898731e7a210f516d","schema_version":"1.0","event_id":"sha256:cc350782069737054daac5cbeea73d24c35a8c393bf30b3898731e7a210f516d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/bundle.json","state_url":"https://pith.science/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/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":"2026-05-30T16:44:36Z","links":{"resolver":"https://pith.science/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF","bundle":"https://pith.science/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/bundle.json","state":"https://pith.science/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XUYYDQVI3FMZXYGU2IRPJVBGUF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XUYYDQVI3FMZXYGU2IRPJVBGUF","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":"c69442de738ccfbe05ec549f42392a8322fb17a080aee3c4d4fcb832d8de0d35","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T12:39:18Z","title_canon_sha256":"5fa5d40060c2622bb4733ebe7198a668e681beb277afd5318c5f80a356312a8e"},"schema_version":"1.0","source":{"id":"1605.03408","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.03408","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"arxiv_version","alias_value":"1605.03408v1","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.03408","created_at":"2026-05-18T01:10:29Z"},{"alias_kind":"pith_short_12","alias_value":"XUYYDQVI3FMZ","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XUYYDQVI3FMZXYGU","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XUYYDQVI","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:cc350782069737054daac5cbeea73d24c35a8c393bf30b3898731e7a210f516d","target":"graph","created_at":"2026-05-18T01:10:29Z","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 the abundance analysis for a sample of 18 red giant branch stars in the metal-poor globular cluster NGC 4147 based on medium and high resolution spectra. This is the first extensive spectroscopic study of this cluster. We derive abundances of C, N, O, Na, Mg, Al, Si, Ca, Ti, Cr, Fe, Ni, Y, Ba, and Eu. We find a metallicity of [Fe/H]=-1.84+-0.02 and an alpha-enhancement of +0.38+-0.05 (errors on the mean), typical of halo globular clusters in this metallicity regime. A significant spread is observed in the abundances of light elements C, N, O, Na, and Al. In particular we found a Na-","authors_text":"Cristian Moni Bidin, Lorenzo Monaco, Paulina Assmann, Sandro Villanova","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T12:39:18Z","title":"A spectroscopic study of the Globular Cluster NGC 4147"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.03408","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":"sha256:3d0703e50dc65e63e6a40c37ec856609ed5b02eb661a1e51160afede5d258f2c","target":"record","created_at":"2026-05-18T01:10:29Z","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":"c69442de738ccfbe05ec549f42392a8322fb17a080aee3c4d4fcb832d8de0d35","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2016-05-11T12:39:18Z","title_canon_sha256":"5fa5d40060c2622bb4733ebe7198a668e681beb277afd5318c5f80a356312a8e"},"schema_version":"1.0","source":{"id":"1605.03408","kind":"arxiv","version":1}},"canonical_sha256":"bd3181c2a8d9599be0d4d222f4d426a1719ea59e5e3cf771bfb590643eed1e0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bd3181c2a8d9599be0d4d222f4d426a1719ea59e5e3cf771bfb590643eed1e0b","first_computed_at":"2026-05-18T01:10:29.874717Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:10:29.874717Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d1Wu+Q4+xg/Z/yqR4FdZVxpxgL4Y9N/o15jTgzk6DXZnSOzUTeNWSysxzXaKJM3vuJAl2GfXI0REOOGo63TMBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:10:29.875182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.03408","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3d0703e50dc65e63e6a40c37ec856609ed5b02eb661a1e51160afede5d258f2c","sha256:cc350782069737054daac5cbeea73d24c35a8c393bf30b3898731e7a210f516d"],"state_sha256":"c7c391de7ff985e9c46e96090fdc0fac6196d85e8961c6f1fea816becdd4a4e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GHgrnCScrP0GRLLpzK/yUmY8HwM2Gjv6omMh0rFJMcjxSYm8dd+vQ1G+eRD4P62c/yK2zMb+2BuLCKdxZgdNBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T16:44:36.542594Z","bundle_sha256":"40d7f3d3eb9526f1b16fedb42e904f4bdd75b523e71e60879e2c3d5b3e9fd2c2"}}