{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:VL5TWM3UCIF6OPCJW4WFKKNGZO","short_pith_number":"pith:VL5TWM3U","canonical_record":{"source":{"id":"1410.2124","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-10-08T14:10:33Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7b461dc3a32c50e06d55ab312d10d14bc7b8dba7ace90ba47aefdbd60156e00a","abstract_canon_sha256":"994c447700659d4da2d62f82200b21e351b4bf4e022d6715b4c856104c79aa75"},"schema_version":"1.0"},"canonical_sha256":"aafb3b3374120be73c49b72c5529a6cb8c6b0c610d1b50b2e385db4752b29280","source":{"kind":"arxiv","id":"1410.2124","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.2124","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"arxiv_version","alias_value":"1410.2124v1","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.2124","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"pith_short_12","alias_value":"VL5TWM3UCIF6","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VL5TWM3UCIF6OPCJ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VL5TWM3U","created_at":"2026-05-18T12:28:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:VL5TWM3UCIF6OPCJW4WFKKNGZO","target":"record","payload":{"canonical_record":{"source":{"id":"1410.2124","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-10-08T14:10:33Z","cross_cats_sorted":["astro-ph.SR"],"title_canon_sha256":"7b461dc3a32c50e06d55ab312d10d14bc7b8dba7ace90ba47aefdbd60156e00a","abstract_canon_sha256":"994c447700659d4da2d62f82200b21e351b4bf4e022d6715b4c856104c79aa75"},"schema_version":"1.0"},"canonical_sha256":"aafb3b3374120be73c49b72c5529a6cb8c6b0c610d1b50b2e385db4752b29280","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:50.013699Z","signature_b64":"9lvlfRdMqbw6uEzqg90Mdf/rc5Vijy6fdZfXq7bg7fxqhNU9syuojUe+9cZ5dgSKoxv/MYvqdPo0yPfXwY8HCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aafb3b3374120be73c49b72c5529a6cb8c6b0c610d1b50b2e385db4752b29280","last_reissued_at":"2026-05-18T01:41:50.013204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:50.013204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1410.2124","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":"2026-05-18T01:41:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gywHgl25sA+4iNz4FMdKnyxrI2Wv25MC32O+CG0pXMjXhFY1wu1cvBjizTmgyVjcRqqHd6J1Z36qdnYNsOl3AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:38:30.548350Z"},"content_sha256":"f83cdf30fad95ca5dd7acbed484d9b0f2c1db12c94e8473884f01b5229b221f8","schema_version":"1.0","event_id":"sha256:f83cdf30fad95ca5dd7acbed484d9b0f2c1db12c94e8473884f01b5229b221f8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:VL5TWM3UCIF6OPCJW4WFKKNGZO","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Carina Project VII: Towards the breaking of the age-metallicity degeneracy of red giant branch stars using the c_UBI index","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"A. Aparicio, A. P. Milone, A. R. Walker, C. Gallart, F. Th\\'evenin, G. Bono, G. Iannicola, I. Ferraro, L. Pulone, M. Dall'Ora, M. Fabrizio, M. Monelli, M. Nonino, P. B. Stetson, R. Buonanno, S. Cassisi","submitted_at":"2014-10-08T14:10:33Z","abstract_excerpt":"We present an analysis of photometric and spectroscopic data of the Carina dSph galaxy, testing a new approach similar to that used to disentangle multiple populations in Galactic globular clusters (GCs). We show that a proper colour combination is able to separate a significant fraction of the red giant branch (RGB) of the two main Carina populations (the old one, \\sim 12 Gyr, and the intermediate-age one, 4-8 Gyr). In particular, the c_UBI=(U-B)-(B-I) pseudo-colour allows us to follow the RGB of both populations along a relevant portion of the RGB. We find that the oldest stars have more neg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.2124","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":"2026-05-18T01:41:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1pzDYMAop2OeOAHCHnnyhljQ35o7MYryeEPcOLpOU+i4aC16F+XZm8hvfbNCgehOKnV7nNxYbni2EGEX/iy7AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:38:30.549041Z"},"content_sha256":"0766f6dd8deebf9e69cbc36aae35e58f957888382824ea7b68b5b068a26dfed7","schema_version":"1.0","event_id":"sha256:0766f6dd8deebf9e69cbc36aae35e58f957888382824ea7b68b5b068a26dfed7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/bundle.json","state_url":"https://pith.science/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/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":"2026-05-26T03:38:30Z","links":{"resolver":"https://pith.science/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO","bundle":"https://pith.science/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/bundle.json","state":"https://pith.science/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VL5TWM3UCIF6OPCJW4WFKKNGZO/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:VL5TWM3UCIF6OPCJW4WFKKNGZO","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":"994c447700659d4da2d62f82200b21e351b4bf4e022d6715b4c856104c79aa75","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-10-08T14:10:33Z","title_canon_sha256":"7b461dc3a32c50e06d55ab312d10d14bc7b8dba7ace90ba47aefdbd60156e00a"},"schema_version":"1.0","source":{"id":"1410.2124","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1410.2124","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"arxiv_version","alias_value":"1410.2124v1","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1410.2124","created_at":"2026-05-18T01:41:50Z"},{"alias_kind":"pith_short_12","alias_value":"VL5TWM3UCIF6","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_16","alias_value":"VL5TWM3UCIF6OPCJ","created_at":"2026-05-18T12:28:54Z"},{"alias_kind":"pith_short_8","alias_value":"VL5TWM3U","created_at":"2026-05-18T12:28:54Z"}],"graph_snapshots":[{"event_id":"sha256:0766f6dd8deebf9e69cbc36aae35e58f957888382824ea7b68b5b068a26dfed7","target":"graph","created_at":"2026-05-18T01:41:50Z","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 an analysis of photometric and spectroscopic data of the Carina dSph galaxy, testing a new approach similar to that used to disentangle multiple populations in Galactic globular clusters (GCs). We show that a proper colour combination is able to separate a significant fraction of the red giant branch (RGB) of the two main Carina populations (the old one, \\sim 12 Gyr, and the intermediate-age one, 4-8 Gyr). In particular, the c_UBI=(U-B)-(B-I) pseudo-colour allows us to follow the RGB of both populations along a relevant portion of the RGB. We find that the oldest stars have more neg","authors_text":"A. Aparicio, A. P. Milone, A. R. Walker, C. Gallart, F. Th\\'evenin, G. Bono, G. Iannicola, I. Ferraro, L. Pulone, M. Dall'Ora, M. Fabrizio, M. Monelli, M. Nonino, P. B. Stetson, R. Buonanno, S. Cassisi","cross_cats":["astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-10-08T14:10:33Z","title":"The Carina Project VII: Towards the breaking of the age-metallicity degeneracy of red giant branch stars using the c_UBI index"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1410.2124","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:f83cdf30fad95ca5dd7acbed484d9b0f2c1db12c94e8473884f01b5229b221f8","target":"record","created_at":"2026-05-18T01:41:50Z","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":"994c447700659d4da2d62f82200b21e351b4bf4e022d6715b4c856104c79aa75","cross_cats_sorted":["astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-10-08T14:10:33Z","title_canon_sha256":"7b461dc3a32c50e06d55ab312d10d14bc7b8dba7ace90ba47aefdbd60156e00a"},"schema_version":"1.0","source":{"id":"1410.2124","kind":"arxiv","version":1}},"canonical_sha256":"aafb3b3374120be73c49b72c5529a6cb8c6b0c610d1b50b2e385db4752b29280","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aafb3b3374120be73c49b72c5529a6cb8c6b0c610d1b50b2e385db4752b29280","first_computed_at":"2026-05-18T01:41:50.013204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:50.013204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9lvlfRdMqbw6uEzqg90Mdf/rc5Vijy6fdZfXq7bg7fxqhNU9syuojUe+9cZ5dgSKoxv/MYvqdPo0yPfXwY8HCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:50.013699Z","signed_message":"canonical_sha256_bytes"},"source_id":"1410.2124","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f83cdf30fad95ca5dd7acbed484d9b0f2c1db12c94e8473884f01b5229b221f8","sha256:0766f6dd8deebf9e69cbc36aae35e58f957888382824ea7b68b5b068a26dfed7"],"state_sha256":"e9158c5b520efdfdf9d6f34178d10e1e6256a2c320fca2163acf4954ff405002"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fo33NX/4vUMTeyJp136J4MDFSO3Qix+fFais6zAjWyBT82lKfdlrpG6HZPQ9U1wW+AlNxll8DzV4lm8B4HxABA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:38:30.552820Z","bundle_sha256":"368b6a3cdd6a9536748237cbbedb3fc10fabb24e565cb649fe24820bbd079dfb"}}