{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:HBLPIM32T4QE6RKEFNCGZ6UEUQ","short_pith_number":"pith:HBLPIM32","canonical_record":{"source":{"id":"1106.1123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-06T17:15:59Z","cross_cats_sorted":[],"title_canon_sha256":"bdbc1316b6003495de051b6931b41b0a6c8d8af76a9f5cc67728a0fcf1e49b51","abstract_canon_sha256":"367c5035bc1b63c460a8fda6faa3ee300b68b4156d33d5921b394fe766168a0f"},"schema_version":"1.0"},"canonical_sha256":"3856f4337a9f204f45442b446cfa84a41e307c727f0d2a1c93d84a5178b2ae7a","source":{"kind":"arxiv","id":"1106.1123","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.1123","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"arxiv_version","alias_value":"1106.1123v1","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1123","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"pith_short_12","alias_value":"HBLPIM32T4QE","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HBLPIM32T4QE6RKE","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HBLPIM32","created_at":"2026-05-18T12:26:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:HBLPIM32T4QE6RKEFNCGZ6UEUQ","target":"record","payload":{"canonical_record":{"source":{"id":"1106.1123","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-06T17:15:59Z","cross_cats_sorted":[],"title_canon_sha256":"bdbc1316b6003495de051b6931b41b0a6c8d8af76a9f5cc67728a0fcf1e49b51","abstract_canon_sha256":"367c5035bc1b63c460a8fda6faa3ee300b68b4156d33d5921b394fe766168a0f"},"schema_version":"1.0"},"canonical_sha256":"3856f4337a9f204f45442b446cfa84a41e307c727f0d2a1c93d84a5178b2ae7a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:20:36.370874Z","signature_b64":"iqJuuArAWEDlhfLIWIWi7Fo80uPMd+claPuWrLBCA0sngp8/ElEgiJcZQ2dkujoxTlrf+/e9PR00LunajMckDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3856f4337a9f204f45442b446cfa84a41e307c727f0d2a1c93d84a5178b2ae7a","last_reissued_at":"2026-05-18T04:20:36.369873Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:20:36.369873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.1123","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":"2026-05-18T04:20:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"io7jcrOwJQ5mS8hz0Sked0pb4i5EQyaGqVwdO9VkK+upHIbHgqa66dCjt7phhLSLwQtwPzl1bLAw+PJApap0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:16:30.089577Z"},"content_sha256":"e684a60cc932a61221fd158c325bb1ef9b8fb453d067040cb58148a4ee6a86df","schema_version":"1.0","event_id":"sha256:e684a60cc932a61221fd158c325bb1ef9b8fb453d067040cb58148a4ee6a86df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:HBLPIM32T4QE6RKEFNCGZ6UEUQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photometric study of the star cluster NGC 2155 in the Large Magellanic Cloud: age estimation and variable stars","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"A. A. Pamyatnykh, A. Olech, M. Otulakowska, S. M. Rucinski, T. Zdravkov, W. Pych","submitted_at":"2011-06-06T17:15:59Z","abstract_excerpt":"We present results of new photometry for the globular star cluster NGC 2155 in the Large Magellanic Cloud (LMC). Our I- and V-band observations were obtained with the 6.5-meter Magellan 1 Baade Telescope at Las Campanas Observatory resulting in deep photometry down to V ~ 24 mag. By analyzing the color-magnitude diagram for the cluster and utilizing the Victoria-Regina grid of isochrones models we estimated the age of the cluster at ~ 2.25 Gyr and [Fe/H]=-0.71, the numbers which place NGC 2155 outside the age-gap in the age-metallicity relation for LMC clusters. Using the Difference Image Anal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1123","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":"2026-05-18T04:20:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n6f+EXpprmELtpDWY+bTBWEAhxIII7d75PmetIYbKD0O67wScRDKT7s+NRFMnjjQMxy5EyYPbckRqQQkL4ywCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T04:16:30.089916Z"},"content_sha256":"e9b4790954d373bd876ccddca9502bf2667a1d692e576c37f1b62ccf07fe23dc","schema_version":"1.0","event_id":"sha256:e9b4790954d373bd876ccddca9502bf2667a1d692e576c37f1b62ccf07fe23dc"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/bundle.json","state_url":"https://pith.science/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/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":"2026-05-28T04:16:30Z","links":{"resolver":"https://pith.science/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ","bundle":"https://pith.science/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/bundle.json","state":"https://pith.science/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HBLPIM32T4QE6RKEFNCGZ6UEUQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:HBLPIM32T4QE6RKEFNCGZ6UEUQ","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":"367c5035bc1b63c460a8fda6faa3ee300b68b4156d33d5921b394fe766168a0f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-06T17:15:59Z","title_canon_sha256":"bdbc1316b6003495de051b6931b41b0a6c8d8af76a9f5cc67728a0fcf1e49b51"},"schema_version":"1.0","source":{"id":"1106.1123","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.1123","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"arxiv_version","alias_value":"1106.1123v1","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.1123","created_at":"2026-05-18T04:20:36Z"},{"alias_kind":"pith_short_12","alias_value":"HBLPIM32T4QE","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_16","alias_value":"HBLPIM32T4QE6RKE","created_at":"2026-05-18T12:26:30Z"},{"alias_kind":"pith_short_8","alias_value":"HBLPIM32","created_at":"2026-05-18T12:26:30Z"}],"graph_snapshots":[{"event_id":"sha256:e9b4790954d373bd876ccddca9502bf2667a1d692e576c37f1b62ccf07fe23dc","target":"graph","created_at":"2026-05-18T04:20:36Z","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 results of new photometry for the globular star cluster NGC 2155 in the Large Magellanic Cloud (LMC). Our I- and V-band observations were obtained with the 6.5-meter Magellan 1 Baade Telescope at Las Campanas Observatory resulting in deep photometry down to V ~ 24 mag. By analyzing the color-magnitude diagram for the cluster and utilizing the Victoria-Regina grid of isochrones models we estimated the age of the cluster at ~ 2.25 Gyr and [Fe/H]=-0.71, the numbers which place NGC 2155 outside the age-gap in the age-metallicity relation for LMC clusters. Using the Difference Image Anal","authors_text":"A. A. Pamyatnykh, A. Olech, M. Otulakowska, S. M. Rucinski, T. Zdravkov, W. Pych","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-06T17:15:59Z","title":"Photometric study of the star cluster NGC 2155 in the Large Magellanic Cloud: age estimation and variable stars"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1123","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:e684a60cc932a61221fd158c325bb1ef9b8fb453d067040cb58148a4ee6a86df","target":"record","created_at":"2026-05-18T04:20:36Z","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":"367c5035bc1b63c460a8fda6faa3ee300b68b4156d33d5921b394fe766168a0f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2011-06-06T17:15:59Z","title_canon_sha256":"bdbc1316b6003495de051b6931b41b0a6c8d8af76a9f5cc67728a0fcf1e49b51"},"schema_version":"1.0","source":{"id":"1106.1123","kind":"arxiv","version":1}},"canonical_sha256":"3856f4337a9f204f45442b446cfa84a41e307c727f0d2a1c93d84a5178b2ae7a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3856f4337a9f204f45442b446cfa84a41e307c727f0d2a1c93d84a5178b2ae7a","first_computed_at":"2026-05-18T04:20:36.369873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:20:36.369873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"iqJuuArAWEDlhfLIWIWi7Fo80uPMd+claPuWrLBCA0sngp8/ElEgiJcZQ2dkujoxTlrf+/e9PR00LunajMckDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:20:36.370874Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.1123","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e684a60cc932a61221fd158c325bb1ef9b8fb453d067040cb58148a4ee6a86df","sha256:e9b4790954d373bd876ccddca9502bf2667a1d692e576c37f1b62ccf07fe23dc"],"state_sha256":"5a3d82a850aa5ddd1b1100cdbd0db20374003d23eeef1319f8724498ef61d66a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"th3DcCACb4uwAuwnF9O1+OLOYiCEsoRIy2egngLdlpilnUdV/dmsGreb/F0AuBxWLyrjnSjRI/lTjlfJht3pDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T04:16:30.091820Z","bundle_sha256":"73e91427de25b540a15038c0709c7bbfd4eaa3f9fd471e2b35a6f3d7c740dbef"}}