{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:K4LQJCJ7Y2U2MUIOP2QZBKSBPA","short_pith_number":"pith:K4LQJCJ7","canonical_record":{"source":{"id":"1705.06281","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-17T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"2343975ae03e63c01702ccef33746dca9a284f30e796d8b234283813f5839258","abstract_canon_sha256":"78efd02f7fdb689f176f913ab6f844396d38cbe5be2274773d692b842324bcfb"},"schema_version":"1.0"},"canonical_sha256":"571704893fc6a9a6510e7ea190aa41781fa8f39f86b08aa22613c4b256a5da51","source":{"kind":"arxiv","id":"1705.06281","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.06281","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"arxiv_version","alias_value":"1705.06281v1","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.06281","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"pith_short_12","alias_value":"K4LQJCJ7Y2U2","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"K4LQJCJ7Y2U2MUIO","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"K4LQJCJ7","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:K4LQJCJ7Y2U2MUIOP2QZBKSBPA","target":"record","payload":{"canonical_record":{"source":{"id":"1705.06281","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-17T18:00:00Z","cross_cats_sorted":[],"title_canon_sha256":"2343975ae03e63c01702ccef33746dca9a284f30e796d8b234283813f5839258","abstract_canon_sha256":"78efd02f7fdb689f176f913ab6f844396d38cbe5be2274773d692b842324bcfb"},"schema_version":"1.0"},"canonical_sha256":"571704893fc6a9a6510e7ea190aa41781fa8f39f86b08aa22613c4b256a5da51","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:41:58.888593Z","signature_b64":"LczRDvEwef/BSqpm91RGz1EOCsLRd7kBML3lfZRPU+nLi4RpnLxwXdPL/q6EEEaNbeRJqnlROxE0n+Fbd08mDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"571704893fc6a9a6510e7ea190aa41781fa8f39f86b08aa22613c4b256a5da51","last_reissued_at":"2026-05-18T00:41:58.888021Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:41:58.888021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1705.06281","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":"2026-05-18T00:41:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yWsCNRGdTqmr0U4I5HBRklklqtgX3VBlvp0W3YpMe7IxXsjCbX6/bOq0vcQpT2qOycqYCHGq+4xRgGCRJPHACA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T06:29:01.459413Z"},"content_sha256":"64f73c54dbae252c67fc27b451712c576169e02608dfb1bd49dbaa9c4b8f998e","schema_version":"1.0","event_id":"sha256:64f73c54dbae252c67fc27b451712c576169e02608dfb1bd49dbaa9c4b8f998e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:K4LQJCJ7Y2U2MUIOP2QZBKSBPA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hierarchical Star Formation in Turbulent Media: Evidence from Young Star Clusters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. Adamo, A. Aloisi, B.G. Elmegreen, D.A. Dale, D.A. Gouliermis, D. Calzetti, D.O. Cook, E.K. Grebel, H. Kim, J.C. Lee, J.E. Ryon, J.S. Gallagher, K. Grasha, L. Kahre, L. Ubeda, M. Fumagalli, M. Messa, M.R. Krumholz, S.N. Bright","submitted_at":"2017-05-17T18:00:00Z","abstract_excerpt":"We present an analysis of the positions and ages of young star clusters in eight local galaxies to investigate the connection between the age difference and separation of cluster pairs. We find that star clusters do not form uniformly but instead are distributed such that the age difference increases with the cluster pair separation to the 0.25-0.6 power, and that the maximum size over which star formation is physically correlated ranges from ~200 pc to ~1 kpc. The observed trends between age difference and separation suggest that cluster formation is hierarchical both in space and time: clust"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.06281","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":"2026-05-18T00:41:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R6873TgwSND+4/AZGwYe2NjsLNCO4oTV4A/6V4fMMDEsDtN6EN9JB/cK/yT9D4fcD+kXinK0mNM3OMktq6sXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T06:29:01.459770Z"},"content_sha256":"87addff5506b17175792862d0505266a6598afcceff67b3f75e34e7f98040ab4","schema_version":"1.0","event_id":"sha256:87addff5506b17175792862d0505266a6598afcceff67b3f75e34e7f98040ab4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/bundle.json","state_url":"https://pith.science/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/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":"2026-05-20T06:29:01Z","links":{"resolver":"https://pith.science/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA","bundle":"https://pith.science/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/bundle.json","state":"https://pith.science/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4LQJCJ7Y2U2MUIOP2QZBKSBPA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:K4LQJCJ7Y2U2MUIOP2QZBKSBPA","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":"78efd02f7fdb689f176f913ab6f844396d38cbe5be2274773d692b842324bcfb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-17T18:00:00Z","title_canon_sha256":"2343975ae03e63c01702ccef33746dca9a284f30e796d8b234283813f5839258"},"schema_version":"1.0","source":{"id":"1705.06281","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1705.06281","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"arxiv_version","alias_value":"1705.06281v1","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.06281","created_at":"2026-05-18T00:41:58Z"},{"alias_kind":"pith_short_12","alias_value":"K4LQJCJ7Y2U2","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"K4LQJCJ7Y2U2MUIO","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"K4LQJCJ7","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:87addff5506b17175792862d0505266a6598afcceff67b3f75e34e7f98040ab4","target":"graph","created_at":"2026-05-18T00:41:58Z","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 present an analysis of the positions and ages of young star clusters in eight local galaxies to investigate the connection between the age difference and separation of cluster pairs. We find that star clusters do not form uniformly but instead are distributed such that the age difference increases with the cluster pair separation to the 0.25-0.6 power, and that the maximum size over which star formation is physically correlated ranges from ~200 pc to ~1 kpc. The observed trends between age difference and separation suggest that cluster formation is hierarchical both in space and time: clust","authors_text":"A. Adamo, A. Aloisi, B.G. Elmegreen, D.A. Dale, D.A. Gouliermis, D. Calzetti, D.O. Cook, E.K. Grebel, H. Kim, J.C. Lee, J.E. Ryon, J.S. Gallagher, K. Grasha, L. Kahre, L. Ubeda, M. Fumagalli, M. Messa, M.R. Krumholz, S.N. Bright","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-17T18:00:00Z","title":"Hierarchical Star Formation in Turbulent Media: Evidence from Young Star Clusters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.06281","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":"sha256:64f73c54dbae252c67fc27b451712c576169e02608dfb1bd49dbaa9c4b8f998e","target":"record","created_at":"2026-05-18T00:41:58Z","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":"78efd02f7fdb689f176f913ab6f844396d38cbe5be2274773d692b842324bcfb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2017-05-17T18:00:00Z","title_canon_sha256":"2343975ae03e63c01702ccef33746dca9a284f30e796d8b234283813f5839258"},"schema_version":"1.0","source":{"id":"1705.06281","kind":"arxiv","version":1}},"canonical_sha256":"571704893fc6a9a6510e7ea190aa41781fa8f39f86b08aa22613c4b256a5da51","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"571704893fc6a9a6510e7ea190aa41781fa8f39f86b08aa22613c4b256a5da51","first_computed_at":"2026-05-18T00:41:58.888021Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:41:58.888021Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LczRDvEwef/BSqpm91RGz1EOCsLRd7kBML3lfZRPU+nLi4RpnLxwXdPL/q6EEEaNbeRJqnlROxE0n+Fbd08mDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:41:58.888593Z","signed_message":"canonical_sha256_bytes"},"source_id":"1705.06281","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:64f73c54dbae252c67fc27b451712c576169e02608dfb1bd49dbaa9c4b8f998e","sha256:87addff5506b17175792862d0505266a6598afcceff67b3f75e34e7f98040ab4"],"state_sha256":"546583f291b6d96103bf2a7b87be6a53d23419106f8e50340f0ea91e78fdaab5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8C10IIsqoM6FjcVFpio6cfU8tPErBqiSBtIO3rukqz9J9LWS0lXyVcz/RIzyh2Q+V+/Fky3mw2tZsWn/q+79Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T06:29:01.461963Z","bundle_sha256":"93b01ed2bfcc46b740b833347c99ed599e1f2603d54b1109c59f4b167bc15ceb"}}