{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:KC3TEAND6RGB2JZOWNPEAVTDOF","short_pith_number":"pith:KC3TEAND","canonical_record":{"source":{"id":"1801.05891","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T00:12:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"de66e8b9e3cf8d55a41f76907441b8a9f0ff9b3e153df07cf72533934bb587d4","abstract_canon_sha256":"bf8c22ff3ee1f9a74c22cfe05439253989e65fb9ae1709353bc592b9116bbceb"},"schema_version":"1.0"},"canonical_sha256":"50b73201a3f44c1d272eb35e4056637164cd17c2201d173ae7a67d5c8e8a0ae3","source":{"kind":"arxiv","id":"1801.05891","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.05891","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"arxiv_version","alias_value":"1801.05891v2","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.05891","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"pith_short_12","alias_value":"KC3TEAND6RGB","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KC3TEAND6RGB2JZO","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KC3TEAND","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:KC3TEAND6RGB2JZOWNPEAVTDOF","target":"record","payload":{"canonical_record":{"source":{"id":"1801.05891","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T00:12:17Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"de66e8b9e3cf8d55a41f76907441b8a9f0ff9b3e153df07cf72533934bb587d4","abstract_canon_sha256":"bf8c22ff3ee1f9a74c22cfe05439253989e65fb9ae1709353bc592b9116bbceb"},"schema_version":"1.0"},"canonical_sha256":"50b73201a3f44c1d272eb35e4056637164cd17c2201d173ae7a67d5c8e8a0ae3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:08.861872Z","signature_b64":"elNjeADQu6iK9xTbaMWxX3qkJlh1AlMcvpN0xmyXniERqxOeglyzAE0gy6FbpMdY4+djr2cuy3lk15aWg5tNCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"50b73201a3f44c1d272eb35e4056637164cd17c2201d173ae7a67d5c8e8a0ae3","last_reissued_at":"2026-05-18T00:14:08.861372Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:08.861372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1801.05891","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:14:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+spxKlKEAsA9/5npRe8U/NbgL78OohpgOyItAj3EGjToTLOnVrpaLdE6KMly+4ieZe4hVjirfICfQh49gs+3Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T13:00:49.499944Z"},"content_sha256":"c8bc870f220035499e57f10f8323503813edf5c41cc94e8bab87844f57175253","schema_version":"1.0","event_id":"sha256:c8bc870f220035499e57f10f8323503813edf5c41cc94e8bab87844f57175253"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:KC3TEAND6RGB2JZOWNPEAVTDOF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Collisions in Primordial Star Clusters: Formation Pathway for intermediate mass black holes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.GA","authors_text":"B. Reinoso, D.R.G. Schleicher, M. Fellhauer, R.S. Klessen, T.C.N. Boekholt","submitted_at":"2018-01-18T00:12:17Z","abstract_excerpt":"Collisions were suggested to potentially play a role in the formation of massive stars in present day clusters, and have likely been relevant during the formation of massive stars and intermediate mass black holes within the first star clusters. In the early Universe, the first stellar clusters were particularly dense, as fragmentation typically only occurred at densities above $10^9$cm$^{-3}$, and the radii of the protostars were enhanced due to the larger accretion rates, suggesting a potentially more relevant role of stellar collisions. We present here a detailed parameter study to assess h"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.05891","kind":"arxiv","version":2},"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":"2026-05-18T00:14:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vH6qmf9AQxZoMFNByriN+/CcyYXMevsEwXbkib/uUbQaroNtYBs7lWPwlTdDmyhaEGpPOaUJwr0g791QIWL2Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T13:00:49.500645Z"},"content_sha256":"fa8cc2244fb78becd87eb6063566a257a8f5d16d0821b5c402fdff6bc6d66ef3","schema_version":"1.0","event_id":"sha256:fa8cc2244fb78becd87eb6063566a257a8f5d16d0821b5c402fdff6bc6d66ef3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/bundle.json","state_url":"https://pith.science/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/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":"2026-05-23T13:00:49Z","links":{"resolver":"https://pith.science/pith/KC3TEAND6RGB2JZOWNPEAVTDOF","bundle":"https://pith.science/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/bundle.json","state":"https://pith.science/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KC3TEAND6RGB2JZOWNPEAVTDOF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:KC3TEAND6RGB2JZOWNPEAVTDOF","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":"bf8c22ff3ee1f9a74c22cfe05439253989e65fb9ae1709353bc592b9116bbceb","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T00:12:17Z","title_canon_sha256":"de66e8b9e3cf8d55a41f76907441b8a9f0ff9b3e153df07cf72533934bb587d4"},"schema_version":"1.0","source":{"id":"1801.05891","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.05891","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"arxiv_version","alias_value":"1801.05891v2","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.05891","created_at":"2026-05-18T00:14:08Z"},{"alias_kind":"pith_short_12","alias_value":"KC3TEAND6RGB","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"KC3TEAND6RGB2JZO","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"KC3TEAND","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:fa8cc2244fb78becd87eb6063566a257a8f5d16d0821b5c402fdff6bc6d66ef3","target":"graph","created_at":"2026-05-18T00:14:08Z","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":"Collisions were suggested to potentially play a role in the formation of massive stars in present day clusters, and have likely been relevant during the formation of massive stars and intermediate mass black holes within the first star clusters. In the early Universe, the first stellar clusters were particularly dense, as fragmentation typically only occurred at densities above $10^9$cm$^{-3}$, and the radii of the protostars were enhanced due to the larger accretion rates, suggesting a potentially more relevant role of stellar collisions. We present here a detailed parameter study to assess h","authors_text":"B. Reinoso, D.R.G. Schleicher, M. Fellhauer, R.S. Klessen, T.C.N. Boekholt","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T00:12:17Z","title":"Collisions in Primordial Star Clusters: Formation Pathway for intermediate mass black holes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.05891","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:c8bc870f220035499e57f10f8323503813edf5c41cc94e8bab87844f57175253","target":"record","created_at":"2026-05-18T00:14:08Z","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":"bf8c22ff3ee1f9a74c22cfe05439253989e65fb9ae1709353bc592b9116bbceb","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2018-01-18T00:12:17Z","title_canon_sha256":"de66e8b9e3cf8d55a41f76907441b8a9f0ff9b3e153df07cf72533934bb587d4"},"schema_version":"1.0","source":{"id":"1801.05891","kind":"arxiv","version":2}},"canonical_sha256":"50b73201a3f44c1d272eb35e4056637164cd17c2201d173ae7a67d5c8e8a0ae3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"50b73201a3f44c1d272eb35e4056637164cd17c2201d173ae7a67d5c8e8a0ae3","first_computed_at":"2026-05-18T00:14:08.861372Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:08.861372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"elNjeADQu6iK9xTbaMWxX3qkJlh1AlMcvpN0xmyXniERqxOeglyzAE0gy6FbpMdY4+djr2cuy3lk15aWg5tNCg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:08.861872Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.05891","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8bc870f220035499e57f10f8323503813edf5c41cc94e8bab87844f57175253","sha256:fa8cc2244fb78becd87eb6063566a257a8f5d16d0821b5c402fdff6bc6d66ef3"],"state_sha256":"6718c88d381ff2ddc71e4a662f0305e0ad44105ff7979c743029b53126a5f8f2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cIRlcP9bpkleFXx3fOrIv9eKcg/UELiRdODr5HymYQ/dzev0u2St1fBKzGnCFm09cf12olQdwAM2U+vJGMfTAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T13:00:49.504809Z","bundle_sha256":"1eebc6dcffe2d6886bc3d8f037bbc04bd9055774007177fe754cfad630afdecc"}}