{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:EPBV2T4SK5J5AUTQO5SUYGCRY6","short_pith_number":"pith:EPBV2T4S","canonical_record":{"source":{"id":"1504.00584","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-02T15:05:32Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8506b668215dc05ce3573598b2166b03946eaea21caedb31bf7ec07506c1ef7a","abstract_canon_sha256":"5dd1b03b5ac429c9c141392ab80ba65d9d3967395d36dda4e5e7733c2f208751"},"schema_version":"1.0"},"canonical_sha256":"23c35d4f925753d0527077654c1851c7811e653ffb49f8346c87bcce503121f0","source":{"kind":"arxiv","id":"1504.00584","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00584","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00584v2","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00584","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"pith_short_12","alias_value":"EPBV2T4SK5J5","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EPBV2T4SK5J5AUTQ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EPBV2T4S","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:EPBV2T4SK5J5AUTQO5SUYGCRY6","target":"record","payload":{"canonical_record":{"source":{"id":"1504.00584","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-02T15:05:32Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"8506b668215dc05ce3573598b2166b03946eaea21caedb31bf7ec07506c1ef7a","abstract_canon_sha256":"5dd1b03b5ac429c9c141392ab80ba65d9d3967395d36dda4e5e7733c2f208751"},"schema_version":"1.0"},"canonical_sha256":"23c35d4f925753d0527077654c1851c7811e653ffb49f8346c87bcce503121f0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:40:49.330673Z","signature_b64":"dWVVBqG+8TvIu5f/2OouipiXOxPXDBo4ecd80LKLhFUF7VDF6OHNpdR8A6MaxPcfknPciTrmqNUVAHUydy7cAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23c35d4f925753d0527077654c1851c7811e653ffb49f8346c87bcce503121f0","last_reissued_at":"2026-05-18T01:40:49.329940Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:40:49.329940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.00584","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:40:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y2K/mZKypXP9YnETmLi6HKdxcUK29gUWBRNuVGE2MtD3hnTHU/pwxlf4vqX/lJeyZrYgf6OgtRtZyh3HP/cMCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T15:05:04.962072Z"},"content_sha256":"48f3c8ceca3da403c25bf4d0b02e38247c702f7747c0b0f30ac13914492bc311","schema_version":"1.0","event_id":"sha256:48f3c8ceca3da403c25bf4d0b02e38247c702f7747c0b0f30ac13914492bc311"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:EPBV2T4SK5J5AUTQO5SUYGCRY6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the Large Magellanic Cloud's recent chemical enrichment history through its star clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.SR","authors_text":"Andrea V. Ahumada, Doug Geisler, Juan J. Clari\\'a, Luciana V. Gramajo, Tali Palma","submitted_at":"2015-04-02T15:05:32Z","abstract_excerpt":"We present Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned $(C-T_1,T_1)$ CMDs, as well as on the $\\delta T_1$ parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediate-age clusters (1.8-2.5 Gyr), with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00584","kind":"arxiv","version":2},"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":"2026-05-18T01:40:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4HjZI4QQFn+NP5pk43gk+KDT9VTCu97wFFATYkp73JDlxN3SnDQlL4u1Ly4KxlbjDoLFs6BDyKErQL1PoLYJAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T15:05:04.962435Z"},"content_sha256":"15213b8f06777b7914222582bb05b62b05ba424dbfd7b9ce3491bc033e727349","schema_version":"1.0","event_id":"sha256:15213b8f06777b7914222582bb05b62b05ba424dbfd7b9ce3491bc033e727349"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/bundle.json","state_url":"https://pith.science/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/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":"2026-06-22T15:05:04Z","links":{"resolver":"https://pith.science/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6","bundle":"https://pith.science/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/bundle.json","state":"https://pith.science/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EPBV2T4SK5J5AUTQO5SUYGCRY6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EPBV2T4SK5J5AUTQO5SUYGCRY6","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":"5dd1b03b5ac429c9c141392ab80ba65d9d3967395d36dda4e5e7733c2f208751","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-02T15:05:32Z","title_canon_sha256":"8506b668215dc05ce3573598b2166b03946eaea21caedb31bf7ec07506c1ef7a"},"schema_version":"1.0","source":{"id":"1504.00584","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.00584","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"arxiv_version","alias_value":"1504.00584v2","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.00584","created_at":"2026-05-18T01:40:49Z"},{"alias_kind":"pith_short_12","alias_value":"EPBV2T4SK5J5","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EPBV2T4SK5J5AUTQ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EPBV2T4S","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:15213b8f06777b7914222582bb05b62b05ba424dbfd7b9ce3491bc033e727349","target":"graph","created_at":"2026-05-18T01:40:49Z","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 Washington system colour-magnitude diagrams (CMDs) for 17 practically unstudied star clusters located in the bar as well as in the inner disc and outer regions of the Large Magellanic Cloud (LMC). Cluster sizes were estimated from star counts distributed throughout the entire observed fields. Based on the best fits of theoretical isochrones to the cleaned $(C-T_1,T_1)$ CMDs, as well as on the $\\delta T_1$ parameter and the standard giant branch method, we derive ages and metallicities for the cluster sample. Four objects are found to be intermediate-age clusters (1.8-2.5 Gyr), with ","authors_text":"Andrea V. Ahumada, Doug Geisler, Juan J. Clari\\'a, Luciana V. Gramajo, Tali Palma","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-02T15:05:32Z","title":"Probing the Large Magellanic Cloud's recent chemical enrichment history through its star clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.00584","kind":"arxiv","version":2},"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":"sha256:48f3c8ceca3da403c25bf4d0b02e38247c702f7747c0b0f30ac13914492bc311","target":"record","created_at":"2026-05-18T01:40:49Z","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":"5dd1b03b5ac429c9c141392ab80ba65d9d3967395d36dda4e5e7733c2f208751","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-04-02T15:05:32Z","title_canon_sha256":"8506b668215dc05ce3573598b2166b03946eaea21caedb31bf7ec07506c1ef7a"},"schema_version":"1.0","source":{"id":"1504.00584","kind":"arxiv","version":2}},"canonical_sha256":"23c35d4f925753d0527077654c1851c7811e653ffb49f8346c87bcce503121f0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23c35d4f925753d0527077654c1851c7811e653ffb49f8346c87bcce503121f0","first_computed_at":"2026-05-18T01:40:49.329940Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:40:49.329940Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dWVVBqG+8TvIu5f/2OouipiXOxPXDBo4ecd80LKLhFUF7VDF6OHNpdR8A6MaxPcfknPciTrmqNUVAHUydy7cAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:40:49.330673Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.00584","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48f3c8ceca3da403c25bf4d0b02e38247c702f7747c0b0f30ac13914492bc311","sha256:15213b8f06777b7914222582bb05b62b05ba424dbfd7b9ce3491bc033e727349"],"state_sha256":"2368c796a8e98a63470c89f5249a68a6422045918190e5b7a7d5f588fe6055db"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z2NLwwQv5Bc5QS8ZQRkdfSLY2Jcet9iznXBEnz+kF2hWrBMRI3ule7OE38i0hQZ50g/khrF64q4q8xBhv5u3Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T15:05:04.964879Z","bundle_sha256":"36d83f6d434c8aa0066960b12be1ef567fc3ab1eccfc1cdc9184422c9f907d4e"}}