{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:NQMC2TK2PBBWGF6QCL4BFKIKNK","short_pith_number":"pith:NQMC2TK2","canonical_record":{"source":{"id":"1001.5412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-29T14:32:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2c38762b40b3a0a120320ca407cac9562c335440fb6f99ab4b2614e2e521570f","abstract_canon_sha256":"82878f803473892e3100cb161b2f03213a59245607a1a962963412c72348c9af"},"schema_version":"1.0"},"canonical_sha256":"6c182d4d5a78436317d012f812a90a6a8eb976325368e2d786323401771a8f7e","source":{"kind":"arxiv","id":"1001.5412","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5412","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5412v1","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5412","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"NQMC2TK2PBBW","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"NQMC2TK2PBBWGF6Q","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"NQMC2TK2","created_at":"2026-05-18T12:26:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:NQMC2TK2PBBWGF6QCL4BFKIKNK","target":"record","payload":{"canonical_record":{"source":{"id":"1001.5412","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-29T14:32:28Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"2c38762b40b3a0a120320ca407cac9562c335440fb6f99ab4b2614e2e521570f","abstract_canon_sha256":"82878f803473892e3100cb161b2f03213a59245607a1a962963412c72348c9af"},"schema_version":"1.0"},"canonical_sha256":"6c182d4d5a78436317d012f812a90a6a8eb976325368e2d786323401771a8f7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:09:22.165789Z","signature_b64":"UCxwsaEuuzEI+cQ5cO/nnL5WHMQuGPE1QwxH8b2ad4wRD6HufQ2z6PCdT5ZcfAt9t0pIwvjUaTJlET38jUYRBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c182d4d5a78436317d012f812a90a6a8eb976325368e2d786323401771a8f7e","last_reissued_at":"2026-05-18T02:09:22.165257Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:09:22.165257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.5412","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":"2026-05-18T02:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"J8gJaj/mkYZOUieiZXoSzNbTOFPjLx3NmZitp6tsqY7cBzpORjgsb+mYh4swCGvdf0Kbh/M4bCrJciggaYLNCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T02:01:47.171645Z"},"content_sha256":"eb00c23d07f5dc102f19ffa01037199df862a08f18aa337845ebd34c0bf18b85","schema_version":"1.0","event_id":"sha256:eb00c23d07f5dc102f19ffa01037199df862a08f18aa337845ebd34c0bf18b85"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:NQMC2TK2PBBWGF6QCL4BFKIKNK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A near-infrared study of AGB and red giant stars in the Leo I dSph galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"E. V. Held, I. Saviane, L. Girardi, L. Rizzi, M. Gullieuszik, P. Marigo","submitted_at":"2010-01-29T14:32:28Z","abstract_excerpt":"A near-infrared imaging study of the evolved stellar populations in the dwarf spheroidal galaxy Leo I is presented. Based on JHK observations obtained with the WFCAM wide-field array at the UKIRT telescope, we build a near-infrared photometric catalogue of red giant branch (RGB) and asymptotic giant branch (AGB) stars in Leo I over a 13.5 arcmin square area. The V-K colours of RGB stars, obtained by combining the new data with existing optical observations, allow us to derive a distribution of global metallicity [M/H] with average [M/H] = -1.51 (uncorrected) or [M/H] = -1.24 +/- 0.05 (int) +/-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5412","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":"2026-05-18T02:09:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AhuCudpknG3eK5MGcbwDMM7poBda2Y8JXBBJ3VdjzkEpmwXCHishnWQOv3XvdyR/9ffhG4F+q6kAY8Rx1okBDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T02:01:47.172443Z"},"content_sha256":"9e2067efa04db20f2eff365e946e90bd1ba0a29056697806bce45d81a6292f54","schema_version":"1.0","event_id":"sha256:9e2067efa04db20f2eff365e946e90bd1ba0a29056697806bce45d81a6292f54"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/bundle.json","state_url":"https://pith.science/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/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":"2026-06-11T02:01:47Z","links":{"resolver":"https://pith.science/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK","bundle":"https://pith.science/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/bundle.json","state":"https://pith.science/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NQMC2TK2PBBWGF6QCL4BFKIKNK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:NQMC2TK2PBBWGF6QCL4BFKIKNK","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":"82878f803473892e3100cb161b2f03213a59245607a1a962963412c72348c9af","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-29T14:32:28Z","title_canon_sha256":"2c38762b40b3a0a120320ca407cac9562c335440fb6f99ab4b2614e2e521570f"},"schema_version":"1.0","source":{"id":"1001.5412","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.5412","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"arxiv_version","alias_value":"1001.5412v1","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.5412","created_at":"2026-05-18T02:09:22Z"},{"alias_kind":"pith_short_12","alias_value":"NQMC2TK2PBBW","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_16","alias_value":"NQMC2TK2PBBWGF6Q","created_at":"2026-05-18T12:26:10Z"},{"alias_kind":"pith_short_8","alias_value":"NQMC2TK2","created_at":"2026-05-18T12:26:10Z"}],"graph_snapshots":[{"event_id":"sha256:9e2067efa04db20f2eff365e946e90bd1ba0a29056697806bce45d81a6292f54","target":"graph","created_at":"2026-05-18T02:09:22Z","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"},"paper":{"abstract_excerpt":"A near-infrared imaging study of the evolved stellar populations in the dwarf spheroidal galaxy Leo I is presented. Based on JHK observations obtained with the WFCAM wide-field array at the UKIRT telescope, we build a near-infrared photometric catalogue of red giant branch (RGB) and asymptotic giant branch (AGB) stars in Leo I over a 13.5 arcmin square area. The V-K colours of RGB stars, obtained by combining the new data with existing optical observations, allow us to derive a distribution of global metallicity [M/H] with average [M/H] = -1.51 (uncorrected) or [M/H] = -1.24 +/- 0.05 (int) +/-","authors_text":"E. V. Held, I. Saviane, L. Girardi, L. Rizzi, M. Gullieuszik, P. Marigo","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-29T14:32:28Z","title":"A near-infrared study of AGB and red giant stars in the Leo I dSph galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.5412","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:eb00c23d07f5dc102f19ffa01037199df862a08f18aa337845ebd34c0bf18b85","target":"record","created_at":"2026-05-18T02:09:22Z","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":"82878f803473892e3100cb161b2f03213a59245607a1a962963412c72348c9af","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2010-01-29T14:32:28Z","title_canon_sha256":"2c38762b40b3a0a120320ca407cac9562c335440fb6f99ab4b2614e2e521570f"},"schema_version":"1.0","source":{"id":"1001.5412","kind":"arxiv","version":1}},"canonical_sha256":"6c182d4d5a78436317d012f812a90a6a8eb976325368e2d786323401771a8f7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c182d4d5a78436317d012f812a90a6a8eb976325368e2d786323401771a8f7e","first_computed_at":"2026-05-18T02:09:22.165257Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:09:22.165257Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UCxwsaEuuzEI+cQ5cO/nnL5WHMQuGPE1QwxH8b2ad4wRD6HufQ2z6PCdT5ZcfAt9t0pIwvjUaTJlET38jUYRBw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:09:22.165789Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.5412","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb00c23d07f5dc102f19ffa01037199df862a08f18aa337845ebd34c0bf18b85","sha256:9e2067efa04db20f2eff365e946e90bd1ba0a29056697806bce45d81a6292f54"],"state_sha256":"fdb02f345c1d4ebb834552162e6f1228b9349d41a1bae6fbca7c94925812afd3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"G8mk87+neaPAJeOY9HMkw608/qszWPaT3H1P9gBWLZcrUxOlfh38i1YelAPFS+S7IIsYGtI3x9NOOAb/UoHFAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T02:01:47.176117Z","bundle_sha256":"5c0b3f5af199035d8788d1a8fc0fd4ec6a4b105e9dd783fcc5e245be7340fa32"}}