{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:Q45USVF7L5OGDQJ4PODWEQS6F4","short_pith_number":"pith:Q45USVF7","canonical_record":{"source":{"id":"1211.3170","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-14T00:16:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"80607ba74ee7e8838e8e71ef0189cc3e9fee3a62a6abe8a9a2b683b54d1a93ff","abstract_canon_sha256":"570df6236510829134ef46f53728bc1f4fa06ced5527a7451e3c25b9347ee13e"},"schema_version":"1.0"},"canonical_sha256":"873b4954bf5f5c61c13c7b8762425e2f25d4066286e6848d3cfeea667c1acb2e","source":{"kind":"arxiv","id":"1211.3170","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.3170","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"arxiv_version","alias_value":"1211.3170v2","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.3170","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"pith_short_12","alias_value":"Q45USVF7L5OG","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"Q45USVF7L5OGDQJ4","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"Q45USVF7","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:Q45USVF7L5OGDQJ4PODWEQS6F4","target":"record","payload":{"canonical_record":{"source":{"id":"1211.3170","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-14T00:16:12Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"80607ba74ee7e8838e8e71ef0189cc3e9fee3a62a6abe8a9a2b683b54d1a93ff","abstract_canon_sha256":"570df6236510829134ef46f53728bc1f4fa06ced5527a7451e3c25b9347ee13e"},"schema_version":"1.0"},"canonical_sha256":"873b4954bf5f5c61c13c7b8762425e2f25d4066286e6848d3cfeea667c1acb2e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:25:58.974675Z","signature_b64":"d2ax2yGb0+alxxlcpBb1vo4/Uvvze/w8WJSpTvf1hnDtgj3CezFzR98OzuDFcLgVtt7sr8JN9mPGOmYrYF2IBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"873b4954bf5f5c61c13c7b8762425e2f25d4066286e6848d3cfeea667c1acb2e","last_reissued_at":"2026-05-18T03:25:58.974189Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:25:58.974189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.3170","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":"2026-05-18T03:25:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8V5DnDuSJhyJkEqjZkwhEji8QA7uOMOp8EksjhHhA62025Vdrx8CwEgmfFi/vmhoKUliY2tKtYGnDTQAXaQ9BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:46:33.266607Z"},"content_sha256":"d73f0470850bb2c0fdf55b0af9d140d286ba4f3f477642081638150a5b5bdc50","schema_version":"1.0","event_id":"sha256:d73f0470850bb2c0fdf55b0af9d140d286ba4f3f477642081638150a5b5bdc50"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:Q45USVF7L5OGDQJ4PODWEQS6F4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.CO","authors_text":"A. Koch, E. Grebel, G. S. Da Costa, H. Jerjen, M. Rejkuba, S. Lianou","submitted_at":"2012-11-14T00:16:12Z","abstract_excerpt":"We focus on the resolved stellar populations of one early- and four transition-type dwarf galaxies in the Sculptor group, with the aim to examine the potential presence of population gradients and place constraints on their mean metallicities. We use deep HST images to construct CMDs, from which we select stellar populations that trace different evolutionary phases in order to constrain their range of ages and metallicities, as well as to examine their spatial distribution. In addition, we use the resolved stars in the RGB in order to derive photometric metallicities. All studied dwarfs contai"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.3170","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":"2026-05-18T03:25:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"E8NXYz9BmdI6AkRLhih5M8VaeTgcToxmpnFG8EIef34Wt25Efh58apd9eBf1vP7OumoqsrmiY1t3PUNVlohxCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T09:46:33.267136Z"},"content_sha256":"0bf527ef037e698305713ae3d1070cc70d55ec1110e199364b7a00fd6d8928f6","schema_version":"1.0","event_id":"sha256:0bf527ef037e698305713ae3d1070cc70d55ec1110e199364b7a00fd6d8928f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/bundle.json","state_url":"https://pith.science/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/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":"2026-08-07T09:46:33Z","links":{"resolver":"https://pith.science/pith/Q45USVF7L5OGDQJ4PODWEQS6F4","bundle":"https://pith.science/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/bundle.json","state":"https://pith.science/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/Q45USVF7L5OGDQJ4PODWEQS6F4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:Q45USVF7L5OGDQJ4PODWEQS6F4","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":"570df6236510829134ef46f53728bc1f4fa06ced5527a7451e3c25b9347ee13e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-14T00:16:12Z","title_canon_sha256":"80607ba74ee7e8838e8e71ef0189cc3e9fee3a62a6abe8a9a2b683b54d1a93ff"},"schema_version":"1.0","source":{"id":"1211.3170","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.3170","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"arxiv_version","alias_value":"1211.3170v2","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.3170","created_at":"2026-05-18T03:25:58Z"},{"alias_kind":"pith_short_12","alias_value":"Q45USVF7L5OG","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"Q45USVF7L5OGDQJ4","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"Q45USVF7","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:0bf527ef037e698305713ae3d1070cc70d55ec1110e199364b7a00fd6d8928f6","target":"graph","created_at":"2026-05-18T03:25:58Z","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 focus on the resolved stellar populations of one early- and four transition-type dwarf galaxies in the Sculptor group, with the aim to examine the potential presence of population gradients and place constraints on their mean metallicities. We use deep HST images to construct CMDs, from which we select stellar populations that trace different evolutionary phases in order to constrain their range of ages and metallicities, as well as to examine their spatial distribution. In addition, we use the resolved stars in the RGB in order to derive photometric metallicities. All studied dwarfs contai","authors_text":"A. Koch, E. Grebel, G. S. Da Costa, H. Jerjen, M. Rejkuba, S. Lianou","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-14T00:16:12Z","title":"Population gradients and photometric metallicities in early- and transition-type dwarf galaxies: Clues from the Sculptor group"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.3170","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:d73f0470850bb2c0fdf55b0af9d140d286ba4f3f477642081638150a5b5bdc50","target":"record","created_at":"2026-05-18T03:25:58Z","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":"570df6236510829134ef46f53728bc1f4fa06ced5527a7451e3c25b9347ee13e","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-11-14T00:16:12Z","title_canon_sha256":"80607ba74ee7e8838e8e71ef0189cc3e9fee3a62a6abe8a9a2b683b54d1a93ff"},"schema_version":"1.0","source":{"id":"1211.3170","kind":"arxiv","version":2}},"canonical_sha256":"873b4954bf5f5c61c13c7b8762425e2f25d4066286e6848d3cfeea667c1acb2e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"873b4954bf5f5c61c13c7b8762425e2f25d4066286e6848d3cfeea667c1acb2e","first_computed_at":"2026-05-18T03:25:58.974189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:58.974189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d2ax2yGb0+alxxlcpBb1vo4/Uvvze/w8WJSpTvf1hnDtgj3CezFzR98OzuDFcLgVtt7sr8JN9mPGOmYrYF2IBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:58.974675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.3170","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d73f0470850bb2c0fdf55b0af9d140d286ba4f3f477642081638150a5b5bdc50","sha256:0bf527ef037e698305713ae3d1070cc70d55ec1110e199364b7a00fd6d8928f6"],"state_sha256":"465e3c485ad66ac5add09bd17b23ce9492241824604083f3e8d75136a57194f2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"W3ja0NC3xlhPGSeQ0l8SYXAfeLc7pWE5foAVRcUrMoI9cCg5z9H6OXnlrZVI9RIUYSNqUMSzvfX9ZoqBI0xtAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T09:46:33.277054Z","bundle_sha256":"1f762b9f345dab7cf2f5c92304420efa1f4731df60afec3eb6399d0ed85328d1"}}