{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:7I5ES3YQDZYCZE6GUFOQIDUKDR","short_pith_number":"pith:7I5ES3YQ","canonical_record":{"source":{"id":"1901.02465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-08T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"a904dc8e72dd53f31cf16023d87ed66873417286ddf5bf98f42d831f3646f5b8","abstract_canon_sha256":"07db6266dc5d12df38a489bc13895c2cef8455ac904df0daa2dbe27b36f61ecd"},"schema_version":"1.0"},"canonical_sha256":"fa3a496f101e702c93c6a15d040e8a1c5c926d0b7797a5aedd876901d0eaacc5","source":{"kind":"arxiv","id":"1901.02465","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02465","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02465v2","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02465","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"pith_short_12","alias_value":"7I5ES3YQDZYC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7I5ES3YQDZYCZE6G","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7I5ES3YQ","created_at":"2026-05-18T12:33:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:7I5ES3YQDZYCZE6GUFOQIDUKDR","target":"record","payload":{"canonical_record":{"source":{"id":"1901.02465","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-08T19:00:04Z","cross_cats_sorted":[],"title_canon_sha256":"a904dc8e72dd53f31cf16023d87ed66873417286ddf5bf98f42d831f3646f5b8","abstract_canon_sha256":"07db6266dc5d12df38a489bc13895c2cef8455ac904df0daa2dbe27b36f61ecd"},"schema_version":"1.0"},"canonical_sha256":"fa3a496f101e702c93c6a15d040e8a1c5c926d0b7797a5aedd876901d0eaacc5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:47:26.676250Z","signature_b64":"ZINll7EkdqXvFpLQuaq7Rs6OvDr8Ncz5ovyei+Wzx0L2lR325FL7nmdMT4Sh6g78kYZhG9UeG9J05ayUQ8EKBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa3a496f101e702c93c6a15d040e8a1c5c926d0b7797a5aedd876901d0eaacc5","last_reissued_at":"2026-05-17T23:47:26.675757Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:47:26.675757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.02465","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":"2026-05-17T23:47:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fu0Oh6d/LqPm7KiLL9+EPxjMz8xyZswpYI84YAsMi1AE1zBigKd0OsSfC1y3X5wScku1wm4vK146qslon2SwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T01:48:24.190948Z"},"content_sha256":"36c6911f8018e5597d45b65fe8c5ec0fbd07729ec1fd79b3f914aa265a5c6126","schema_version":"1.0","event_id":"sha256:36c6911f8018e5597d45b65fe8c5ec0fbd07729ec1fd79b3f914aa265a5c6126"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:7I5ES3YQDZYCZE6GUFOQIDUKDR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The fate of planetesimal discs in young open clusters: implications for 1I/'Oumuamua, the Kuiper belt, the Oort cloud and more","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Amery Gration, Ben Moore, Joachim Stadel, Thomas Oliver Hands, Walter Dehnen","submitted_at":"2019-01-08T19:00:04Z","abstract_excerpt":"We perform $N$-body simulations of the early phases of open cluster evolution including a large population of planetesimals, initially arranged in Kuiper-belt like discs around each star. Using a new, 4th-order and time-reversible $N$-body code on Graphics Processing Units (GPUs), we evolve the whole system under the stellar gravity, i.e. treating planetesimals as test particles, and consider two types of initial cluster models, similar to IC348 and the Hyades, respectively. In both cases, planetesimals can be dynamically excited, transferred between stars or liberated to become free-floating "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02465","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":"2026-05-17T23:47:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w9fh2KzpY7JaUBtxR+Um1rMo2QcZ+eO0GzTep8X1rWkDlsQQ0obYtztxLcqMemYzsqHGcHqYHq4TnbvFv4CvAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T01:48:24.191669Z"},"content_sha256":"0c5f08fdfb4b5c001d9a0b04a38687ec5a4cf1cdfd5d0ba01818b362b0e46390","schema_version":"1.0","event_id":"sha256:0c5f08fdfb4b5c001d9a0b04a38687ec5a4cf1cdfd5d0ba01818b362b0e46390"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/bundle.json","state_url":"https://pith.science/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/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":"2026-08-04T01:48:24Z","links":{"resolver":"https://pith.science/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR","bundle":"https://pith.science/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/bundle.json","state":"https://pith.science/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7I5ES3YQDZYCZE6GUFOQIDUKDR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:7I5ES3YQDZYCZE6GUFOQIDUKDR","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":"07db6266dc5d12df38a489bc13895c2cef8455ac904df0daa2dbe27b36f61ecd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-08T19:00:04Z","title_canon_sha256":"a904dc8e72dd53f31cf16023d87ed66873417286ddf5bf98f42d831f3646f5b8"},"schema_version":"1.0","source":{"id":"1901.02465","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.02465","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"arxiv_version","alias_value":"1901.02465v2","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.02465","created_at":"2026-05-17T23:47:26Z"},{"alias_kind":"pith_short_12","alias_value":"7I5ES3YQDZYC","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_16","alias_value":"7I5ES3YQDZYCZE6G","created_at":"2026-05-18T12:33:12Z"},{"alias_kind":"pith_short_8","alias_value":"7I5ES3YQ","created_at":"2026-05-18T12:33:12Z"}],"graph_snapshots":[{"event_id":"sha256:0c5f08fdfb4b5c001d9a0b04a38687ec5a4cf1cdfd5d0ba01818b362b0e46390","target":"graph","created_at":"2026-05-17T23:47:26Z","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 perform $N$-body simulations of the early phases of open cluster evolution including a large population of planetesimals, initially arranged in Kuiper-belt like discs around each star. Using a new, 4th-order and time-reversible $N$-body code on Graphics Processing Units (GPUs), we evolve the whole system under the stellar gravity, i.e. treating planetesimals as test particles, and consider two types of initial cluster models, similar to IC348 and the Hyades, respectively. In both cases, planetesimals can be dynamically excited, transferred between stars or liberated to become free-floating ","authors_text":"Amery Gration, Ben Moore, Joachim Stadel, Thomas Oliver Hands, Walter Dehnen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-08T19:00:04Z","title":"The fate of planetesimal discs in young open clusters: implications for 1I/'Oumuamua, the Kuiper belt, the Oort cloud and more"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.02465","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":"sha256:36c6911f8018e5597d45b65fe8c5ec0fbd07729ec1fd79b3f914aa265a5c6126","target":"record","created_at":"2026-05-17T23:47:26Z","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":"07db6266dc5d12df38a489bc13895c2cef8455ac904df0daa2dbe27b36f61ecd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-01-08T19:00:04Z","title_canon_sha256":"a904dc8e72dd53f31cf16023d87ed66873417286ddf5bf98f42d831f3646f5b8"},"schema_version":"1.0","source":{"id":"1901.02465","kind":"arxiv","version":2}},"canonical_sha256":"fa3a496f101e702c93c6a15d040e8a1c5c926d0b7797a5aedd876901d0eaacc5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa3a496f101e702c93c6a15d040e8a1c5c926d0b7797a5aedd876901d0eaacc5","first_computed_at":"2026-05-17T23:47:26.675757Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:47:26.675757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ZINll7EkdqXvFpLQuaq7Rs6OvDr8Ncz5ovyei+Wzx0L2lR325FL7nmdMT4Sh6g78kYZhG9UeG9J05ayUQ8EKBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:47:26.676250Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.02465","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36c6911f8018e5597d45b65fe8c5ec0fbd07729ec1fd79b3f914aa265a5c6126","sha256:0c5f08fdfb4b5c001d9a0b04a38687ec5a4cf1cdfd5d0ba01818b362b0e46390"],"state_sha256":"9b96c8cb73e4fe7c5197521ae0d31dc197e776960bb2151a9b38485a96e8ef53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qbWyQAGVO+Ukr0SpUAoY93nZzegh52udXCwaSTFRebWx8a7AbEQyS2BUWYSciP9dzk8EZvq5RlWy9WSzP75CBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T01:48:24.195477Z","bundle_sha256":"7d3a070442e892ba4d02b9c90f009d8a4da5ed46afde654a8c1042d3435d0d17"}}