{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:ELZDHTQRDZVSBZ5ECIGZNAQS7K","short_pith_number":"pith:ELZDHTQR","canonical_record":{"source":{"id":"1306.5245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-21T20:00:45Z","cross_cats_sorted":[],"title_canon_sha256":"7d044825e146a446b4df15cddee46e57142eb4cc4c0e3923a01c3215ee5a1fe9","abstract_canon_sha256":"97142a33ff63f50905833033cba9ac37c295c20d2cc115a8369e5aef78385e12"},"schema_version":"1.0"},"canonical_sha256":"22f233ce111e6b20e7a4120d968212fa9b1edf44c95a17ace184e18c527fb607","source":{"kind":"arxiv","id":"1306.5245","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.5245","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"arxiv_version","alias_value":"1306.5245v1","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.5245","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"pith_short_12","alias_value":"ELZDHTQRDZVS","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"ELZDHTQRDZVSBZ5E","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"ELZDHTQR","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:ELZDHTQRDZVSBZ5ECIGZNAQS7K","target":"record","payload":{"canonical_record":{"source":{"id":"1306.5245","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-21T20:00:45Z","cross_cats_sorted":[],"title_canon_sha256":"7d044825e146a446b4df15cddee46e57142eb4cc4c0e3923a01c3215ee5a1fe9","abstract_canon_sha256":"97142a33ff63f50905833033cba9ac37c295c20d2cc115a8369e5aef78385e12"},"schema_version":"1.0"},"canonical_sha256":"22f233ce111e6b20e7a4120d968212fa9b1edf44c95a17ace184e18c527fb607","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:49:13.791989Z","signature_b64":"f7XLLcTRVd1kiHqJGh/pdBSkInKRdyqmUHIJauJniQmSchfx40gyAJ6Ppo++/FYI75NmaPEjeb5GVuPCS+MfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22f233ce111e6b20e7a4120d968212fa9b1edf44c95a17ace184e18c527fb607","last_reissued_at":"2026-05-18T01:49:13.791381Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:49:13.791381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.5245","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":"2026-05-18T01:49:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VEL1jQ03EYpO0Q7+8KJuaBvKflBBbyx4Zc7rDZtxeVwAzm+bq5DeKvUsPlz+4NE0n+zPCt6jZAi8hitIJhlBBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T10:40:39.906791Z"},"content_sha256":"7c479abd390c2d0f80fbb3a64adcf18e6d0a111de7f1273001c19b243b856486","schema_version":"1.0","event_id":"sha256:7c479abd390c2d0f80fbb3a64adcf18e6d0a111de7f1273001c19b243b856486"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:ELZDHTQRDZVSBZ5ECIGZNAQS7K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Filling the gap: a new class of old star cluster?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Aaron Romanowsky, Christopher Usher, Duncan Forbes, Jacob Arnold, Jay Strader, Jean Brodie, Lee Spitler, Vincenzo Pota","submitted_at":"2013-06-21T20:00:45Z","abstract_excerpt":"It is not understood whether long-lived star clusters possess a continuous range of sizes and masses (and hence densities), or if rather, they should be considered as distinct types with different origins. Utilizing the Hubble Space Telescope (HST) to measure sizes, and long exposures on the Keck 10m telescope to obtain distances, we have discovered the first confirmed star clusters that lie within a previously claimed size-luminosity gap dubbed the `avoidance zone' by Hwang et al (2011). The existence of these star clusters extends the range of sizes, masses and densities for star clusters, a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.5245","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":"2026-05-18T01:49:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yOFQTakTUk/Dm8hErZ4XIWHkq7qiQd5FT2QhBiQ4H1JfdBxRrfDIl2veFS3Q8d37sE7YpQ2MuVyx4ZDKRWtcAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T10:40:39.907511Z"},"content_sha256":"beec38f95eb8960692a354799f4765e06e74e983e3b06b2028e4a573f9177508","schema_version":"1.0","event_id":"sha256:beec38f95eb8960692a354799f4765e06e74e983e3b06b2028e4a573f9177508"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/bundle.json","state_url":"https://pith.science/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/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":"2026-06-06T10:40:39Z","links":{"resolver":"https://pith.science/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K","bundle":"https://pith.science/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/bundle.json","state":"https://pith.science/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ELZDHTQRDZVSBZ5ECIGZNAQS7K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:ELZDHTQRDZVSBZ5ECIGZNAQS7K","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":"97142a33ff63f50905833033cba9ac37c295c20d2cc115a8369e5aef78385e12","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-21T20:00:45Z","title_canon_sha256":"7d044825e146a446b4df15cddee46e57142eb4cc4c0e3923a01c3215ee5a1fe9"},"schema_version":"1.0","source":{"id":"1306.5245","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.5245","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"arxiv_version","alias_value":"1306.5245v1","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.5245","created_at":"2026-05-18T01:49:13Z"},{"alias_kind":"pith_short_12","alias_value":"ELZDHTQRDZVS","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"ELZDHTQRDZVSBZ5E","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"ELZDHTQR","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:beec38f95eb8960692a354799f4765e06e74e983e3b06b2028e4a573f9177508","target":"graph","created_at":"2026-05-18T01:49:13Z","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":"It is not understood whether long-lived star clusters possess a continuous range of sizes and masses (and hence densities), or if rather, they should be considered as distinct types with different origins. Utilizing the Hubble Space Telescope (HST) to measure sizes, and long exposures on the Keck 10m telescope to obtain distances, we have discovered the first confirmed star clusters that lie within a previously claimed size-luminosity gap dubbed the `avoidance zone' by Hwang et al (2011). The existence of these star clusters extends the range of sizes, masses and densities for star clusters, a","authors_text":"Aaron Romanowsky, Christopher Usher, Duncan Forbes, Jacob Arnold, Jay Strader, Jean Brodie, Lee Spitler, Vincenzo Pota","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-21T20:00:45Z","title":"Filling the gap: a new class of old star cluster?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.5245","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":"sha256:7c479abd390c2d0f80fbb3a64adcf18e6d0a111de7f1273001c19b243b856486","target":"record","created_at":"2026-05-18T01:49:13Z","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":"97142a33ff63f50905833033cba9ac37c295c20d2cc115a8369e5aef78385e12","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2013-06-21T20:00:45Z","title_canon_sha256":"7d044825e146a446b4df15cddee46e57142eb4cc4c0e3923a01c3215ee5a1fe9"},"schema_version":"1.0","source":{"id":"1306.5245","kind":"arxiv","version":1}},"canonical_sha256":"22f233ce111e6b20e7a4120d968212fa9b1edf44c95a17ace184e18c527fb607","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22f233ce111e6b20e7a4120d968212fa9b1edf44c95a17ace184e18c527fb607","first_computed_at":"2026-05-18T01:49:13.791381Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:13.791381Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f7XLLcTRVd1kiHqJGh/pdBSkInKRdyqmUHIJauJniQmSchfx40gyAJ6Ppo++/FYI75NmaPEjeb5GVuPCS+MfDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:13.791989Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.5245","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c479abd390c2d0f80fbb3a64adcf18e6d0a111de7f1273001c19b243b856486","sha256:beec38f95eb8960692a354799f4765e06e74e983e3b06b2028e4a573f9177508"],"state_sha256":"90a2a4090460aff6b2f3b2b9cb45967a21fed3df50f3c1c1591802f6b1e917ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CzmFVyYRa2PfQTCpV3KH3m3tVYJ7snzIEfm6MmF6u3kFQ6P433PaCIa3or2dA2p2eYlYumiXNllvXkT+QlPACA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T10:40:39.913306Z","bundle_sha256":"fcc83270ed31c58b505f3a92ca679044644eed5e6aff7b542952032245e1486f"}}