{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:CZJIOYUS72EH2P7P4JCGWU3BNO","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":"1409f3d3d1346fbeb82e1253469520413daad272c64bce36ace9ee4fac2b9f3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-07T18:00:01Z","title_canon_sha256":"d7e94d99b2835f12a3cb19cf375a441c533cce49a82a2eb1a1f4ca8119cc76aa"},"schema_version":"1.0","source":{"id":"1809.02617","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.02617","created_at":"2026-05-17T23:58:30Z"},{"alias_kind":"arxiv_version","alias_value":"1809.02617v2","created_at":"2026-05-17T23:58:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.02617","created_at":"2026-05-17T23:58:30Z"},{"alias_kind":"pith_short_12","alias_value":"CZJIOYUS72EH","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"CZJIOYUS72EH2P7P","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"CZJIOYUS","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:f03399a1567c410f839e67fb91467d98140c782f02f751aaeb694c449f72ce04","target":"graph","created_at":"2026-05-17T23:58:30Z","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 report on a superdense star-forming region with an effective radius (R_e) smaller than 13 pc identified at z=6.143 and showing a star-formation rate density \\Sigma_SFR~1000 Msun/yr/kpc2 (or conservatively >300 Msun/yr/kpc2). Such a dense region is detected with S/N>40 hosted by a dwarf extending over 440 pc, dubbed D1 (Vanzella et al. 2017b). D1 is magnified by a factor 17.4+/-5.0 behind the Hubble Frontier Field galaxy cluster MACS~J0416 and elongated tangentially by a factor 13.2+/-4.0 (including the systematic errors). The lens model accurately reproduces the positions of the confirmed m","authors_text":"A. Mercurio, C. Arcidiacono, C. Grillo, E. Vanzella, F. Calura, F. Cortecchia, G.B. Caminha, G. Cupani, G. Fiorentino, M. Castellano, M. Lombini, M. Meneghetti, M. Mignoli, P. Rosati, R. Gilli","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-07T18:00:01Z","title":"Massive Star cluster formation under the microscope at z=6"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.02617","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:bfd1da0386ba2333962919ec91597b755d0c5edff801991541ad36dad32b4f73","target":"record","created_at":"2026-05-17T23:58:30Z","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":"1409f3d3d1346fbeb82e1253469520413daad272c64bce36ace9ee4fac2b9f3d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-09-07T18:00:01Z","title_canon_sha256":"d7e94d99b2835f12a3cb19cf375a441c533cce49a82a2eb1a1f4ca8119cc76aa"},"schema_version":"1.0","source":{"id":"1809.02617","kind":"arxiv","version":2}},"canonical_sha256":"1652876292fe887d3fefe2446b53616bb1aa44052dc222f5738621b189a0c4d5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1652876292fe887d3fefe2446b53616bb1aa44052dc222f5738621b189a0c4d5","first_computed_at":"2026-05-17T23:58:30.521727Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:58:30.521727Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"G4W+LCvhDQ6LmVqD4x5kF9NEzlsi++Ax/qXpSo05aOp3OOPr/+WCgZ+NjQkteuU1CPt13X686ngJO+SXLhxRAA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:58:30.522224Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.02617","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bfd1da0386ba2333962919ec91597b755d0c5edff801991541ad36dad32b4f73","sha256:f03399a1567c410f839e67fb91467d98140c782f02f751aaeb694c449f72ce04"],"state_sha256":"b58495194f5ccd150f3de58a283f852fdadf5f718190ff1f4877c9c70f9b7b98"}