{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:2APRQ5EHDANBZEAKLADWYOZCW4","short_pith_number":"pith:2APRQ5EH","canonical_record":{"source":{"id":"1502.05986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-20T20:29:49Z","cross_cats_sorted":[],"title_canon_sha256":"9c4f9c9c9c19dacc25f291f5dc25be17c20323a776048a66f983f6b7464d628f","abstract_canon_sha256":"4030e615a91fc96500c1b79b49bc46c4871be8308b0b357d5c1d9ac5c188f19c"},"schema_version":"1.0"},"canonical_sha256":"d01f187487181a1c900a58076c3b22b70970bcc76085ba5ca8aa7e23d9f4b534","source":{"kind":"arxiv","id":"1502.05986","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.05986","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.05986v1","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.05986","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"pith_short_12","alias_value":"2APRQ5EHDANB","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2APRQ5EHDANBZEAK","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2APRQ5EH","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:2APRQ5EHDANBZEAKLADWYOZCW4","target":"record","payload":{"canonical_record":{"source":{"id":"1502.05986","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-20T20:29:49Z","cross_cats_sorted":[],"title_canon_sha256":"9c4f9c9c9c19dacc25f291f5dc25be17c20323a776048a66f983f6b7464d628f","abstract_canon_sha256":"4030e615a91fc96500c1b79b49bc46c4871be8308b0b357d5c1d9ac5c188f19c"},"schema_version":"1.0"},"canonical_sha256":"d01f187487181a1c900a58076c3b22b70970bcc76085ba5ca8aa7e23d9f4b534","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:41:00.556476Z","signature_b64":"PojSOtxE/3j/KbTBvYTkdO0BtQ3HFFWAcNVHMD0zNmBejD7xXaHzQG4sil0SXB09v3cUsEUTC7TR9Jgf0XOBDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d01f187487181a1c900a58076c3b22b70970bcc76085ba5ca8aa7e23d9f4b534","last_reissued_at":"2026-05-18T01:41:00.555785Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:41:00.555785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1502.05986","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":"2026-05-18T01:41:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YnUezvd1170mRHTYv3H3rX9RkF72Y5jLKyohCWZ+DjqukRxd7G4nTDqYwR8G9C+RbO+9FNRp3BgSaXqu2SdlCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:55:51.176121Z"},"content_sha256":"8c4a2a33b28a079b4cd3c1002abffd366eb461defc03698af45639c286d741d5","schema_version":"1.0","event_id":"sha256:8c4a2a33b28a079b4cd3c1002abffd366eb461defc03698af45639c286d741d5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:2APRQ5EHDANBZEAKLADWYOZCW4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The extremely populated globular cluster system of the lenticular galaxy NGC 6861","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Carlos G. Escudero, Favio R. Faifer, Juan Pablo Calderon, Juan Pablo Caso, Lilia P. Bassino","submitted_at":"2015-02-20T20:29:49Z","abstract_excerpt":"We present a photometric study of the globular cluster (GC) system associated to the lenticular galaxy (S0) NGC 6861, which is located in a relatively low density environment. It is based on GEMINI/GMOS images in the filters g', r', i' of three fields, obtained under good seeing conditions. Analyzing the colour-magnitude and colour-colour diagrams, we find a large number of GC candidates, which extends out to 100 kpc, and we estimate a total population of 3000+/-300 GCs. Besides the well known blue and red subpopulations, the colour distribution shows signs of the possible existence of a third"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.05986","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":"2026-05-18T01:41:00Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JEGO73WTS5JXzukIkJ8iMvbRfVa8rwCBwDmk/08cEATJF1Svyhh2YiRAJNsYWaoL3aLFjierk/ZhEXBBN/RXDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T03:55:51.176482Z"},"content_sha256":"39e4e3997051c4d4c833ae3a3cc91ad0fe93d27e3703cad5decd4e6551e598f6","schema_version":"1.0","event_id":"sha256:39e4e3997051c4d4c833ae3a3cc91ad0fe93d27e3703cad5decd4e6551e598f6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2APRQ5EHDANBZEAKLADWYOZCW4/bundle.json","state_url":"https://pith.science/pith/2APRQ5EHDANBZEAKLADWYOZCW4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2APRQ5EHDANBZEAKLADWYOZCW4/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":"2026-05-27T03:55:51Z","links":{"resolver":"https://pith.science/pith/2APRQ5EHDANBZEAKLADWYOZCW4","bundle":"https://pith.science/pith/2APRQ5EHDANBZEAKLADWYOZCW4/bundle.json","state":"https://pith.science/pith/2APRQ5EHDANBZEAKLADWYOZCW4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2APRQ5EHDANBZEAKLADWYOZCW4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2APRQ5EHDANBZEAKLADWYOZCW4","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":"4030e615a91fc96500c1b79b49bc46c4871be8308b0b357d5c1d9ac5c188f19c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-20T20:29:49Z","title_canon_sha256":"9c4f9c9c9c19dacc25f291f5dc25be17c20323a776048a66f983f6b7464d628f"},"schema_version":"1.0","source":{"id":"1502.05986","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1502.05986","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"arxiv_version","alias_value":"1502.05986v1","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.05986","created_at":"2026-05-18T01:41:00Z"},{"alias_kind":"pith_short_12","alias_value":"2APRQ5EHDANB","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2APRQ5EHDANBZEAK","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2APRQ5EH","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:39e4e3997051c4d4c833ae3a3cc91ad0fe93d27e3703cad5decd4e6551e598f6","target":"graph","created_at":"2026-05-18T01:41:00Z","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 a photometric study of the globular cluster (GC) system associated to the lenticular galaxy (S0) NGC 6861, which is located in a relatively low density environment. It is based on GEMINI/GMOS images in the filters g', r', i' of three fields, obtained under good seeing conditions. Analyzing the colour-magnitude and colour-colour diagrams, we find a large number of GC candidates, which extends out to 100 kpc, and we estimate a total population of 3000+/-300 GCs. Besides the well known blue and red subpopulations, the colour distribution shows signs of the possible existence of a third","authors_text":"Carlos G. Escudero, Favio R. Faifer, Juan Pablo Calderon, Juan Pablo Caso, Lilia P. Bassino","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-20T20:29:49Z","title":"The extremely populated globular cluster system of the lenticular galaxy NGC 6861"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.05986","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":"sha256:8c4a2a33b28a079b4cd3c1002abffd366eb461defc03698af45639c286d741d5","target":"record","created_at":"2026-05-18T01:41:00Z","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":"4030e615a91fc96500c1b79b49bc46c4871be8308b0b357d5c1d9ac5c188f19c","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2015-02-20T20:29:49Z","title_canon_sha256":"9c4f9c9c9c19dacc25f291f5dc25be17c20323a776048a66f983f6b7464d628f"},"schema_version":"1.0","source":{"id":"1502.05986","kind":"arxiv","version":1}},"canonical_sha256":"d01f187487181a1c900a58076c3b22b70970bcc76085ba5ca8aa7e23d9f4b534","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d01f187487181a1c900a58076c3b22b70970bcc76085ba5ca8aa7e23d9f4b534","first_computed_at":"2026-05-18T01:41:00.555785Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:41:00.555785Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PojSOtxE/3j/KbTBvYTkdO0BtQ3HFFWAcNVHMD0zNmBejD7xXaHzQG4sil0SXB09v3cUsEUTC7TR9Jgf0XOBDA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:41:00.556476Z","signed_message":"canonical_sha256_bytes"},"source_id":"1502.05986","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c4a2a33b28a079b4cd3c1002abffd366eb461defc03698af45639c286d741d5","sha256:39e4e3997051c4d4c833ae3a3cc91ad0fe93d27e3703cad5decd4e6551e598f6"],"state_sha256":"db9b4741c02662544e0ad910e4e8f9e1533077dd7abc3da801105cef8d67235e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JLwVUejvlMd5HucMfYT4nsK6Q78/qdvcs3MA5NjMYJ2JKNBCBM9eESuZjLrm+egsQli7CAJGLqKimZJciOiHAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T03:55:51.178477Z","bundle_sha256":"a1fe7f454fadd038626925f47c8df32c66f8604585b5cb8d1e88f42baf458e17"}}