{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:PIKVSY3ZDBFJ3ZEDIWZMAB6MKU","short_pith_number":"pith:PIKVSY3Z","canonical_record":{"source":{"id":"1306.6587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-27T18:03:54Z","cross_cats_sorted":[],"title_canon_sha256":"cf70fb268924742d81c0b21cfa6592219fdf0193e2996e00196672e5b11d93cb","abstract_canon_sha256":"f4aa89ac2a78b60eb90661cb32fece2ff4a047a872cfc9703881beec91ae9bda"},"schema_version":"1.0"},"canonical_sha256":"7a15596379184a9de48345b2c007cc55249fb9425eae08ab2186e16c163ebc5f","source":{"kind":"arxiv","id":"1306.6587","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.6587","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.6587v1","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.6587","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"PIKVSY3ZDBFJ","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PIKVSY3ZDBFJ3ZED","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PIKVSY3Z","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:PIKVSY3ZDBFJ3ZEDIWZMAB6MKU","target":"record","payload":{"canonical_record":{"source":{"id":"1306.6587","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-27T18:03:54Z","cross_cats_sorted":[],"title_canon_sha256":"cf70fb268924742d81c0b21cfa6592219fdf0193e2996e00196672e5b11d93cb","abstract_canon_sha256":"f4aa89ac2a78b60eb90661cb32fece2ff4a047a872cfc9703881beec91ae9bda"},"schema_version":"1.0"},"canonical_sha256":"7a15596379184a9de48345b2c007cc55249fb9425eae08ab2186e16c163ebc5f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:03:32.008182Z","signature_b64":"yyL+H7nVxzvzhkmcxCo/9kX9/5fz0T4EDlj10ZkJFkc7fDaiM4sBLK+vKPndLDT9B+Xw0XkgVntcHLjTdcXfDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7a15596379184a9de48345b2c007cc55249fb9425eae08ab2186e16c163ebc5f","last_reissued_at":"2026-05-18T03:03:32.007347Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:03:32.007347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1306.6587","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":"2026-05-18T03:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hfDu9XZZyQuhZMQJ2CLvrBPY2Iwf4aKBh4M0h6S6p7karrhEVFa2oW9xO/lzH0+S0sYBiWgZQfwSSvGbq2vLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T11:17:49.833707Z"},"content_sha256":"ab0c65a9bbdd9d875a0913ce3d284e2c749a4612e329c0a24dfd4cbca3bd1020","schema_version":"1.0","event_id":"sha256:ab0c65a9bbdd9d875a0913ce3d284e2c749a4612e329c0a24dfd4cbca3bd1020"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:PIKVSY3ZDBFJ3ZEDIWZMAB6MKU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SPH-based simulation of multi-material asteroid collisions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"\\'Aron S\\\"uli, Christoph Sch\\\"afer, Emese Forg\\'acs-Dajka, Roland Speith, Rudolf Dvorak, Thomas I. Maindl","submitted_at":"2013-06-27T18:03:54Z","abstract_excerpt":"We give a brief introduction to smoothed particle hydrodynamics methods for continuum mechanics. Specifically, we present our 3D SPH code to simulate and analyze collisions of asteroids consisting of two types of material: basaltic rock and ice. We consider effects like brittle failure, fragmentation, and merging in different impact scenarios. After validating our code against previously published results we present first collision results based on measured values for the Weibull flaw distribution parameters of basalt."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.6587","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":"2026-05-18T03:03:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"f1B2CII3sUQTCfJRQJLfbxSQjhq/psfwkrjGKG7NjjgJn2B1SSjhhJWRBL5n9Y1BjKH9V5fRhxl8WMWc9U+IDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T11:17:49.834366Z"},"content_sha256":"2805232d09c7f94f4ea3b89135b7254bfafda9abbd55cf349eefe497d3930353","schema_version":"1.0","event_id":"sha256:2805232d09c7f94f4ea3b89135b7254bfafda9abbd55cf349eefe497d3930353"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/bundle.json","state_url":"https://pith.science/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/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":"2026-05-21T11:17:49Z","links":{"resolver":"https://pith.science/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU","bundle":"https://pith.science/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/bundle.json","state":"https://pith.science/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PIKVSY3ZDBFJ3ZEDIWZMAB6MKU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:PIKVSY3ZDBFJ3ZEDIWZMAB6MKU","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":"f4aa89ac2a78b60eb90661cb32fece2ff4a047a872cfc9703881beec91ae9bda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-27T18:03:54Z","title_canon_sha256":"cf70fb268924742d81c0b21cfa6592219fdf0193e2996e00196672e5b11d93cb"},"schema_version":"1.0","source":{"id":"1306.6587","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1306.6587","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"arxiv_version","alias_value":"1306.6587v1","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1306.6587","created_at":"2026-05-18T03:03:32Z"},{"alias_kind":"pith_short_12","alias_value":"PIKVSY3ZDBFJ","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"PIKVSY3ZDBFJ3ZED","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"PIKVSY3Z","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:2805232d09c7f94f4ea3b89135b7254bfafda9abbd55cf349eefe497d3930353","target":"graph","created_at":"2026-05-18T03:03:32Z","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 give a brief introduction to smoothed particle hydrodynamics methods for continuum mechanics. Specifically, we present our 3D SPH code to simulate and analyze collisions of asteroids consisting of two types of material: basaltic rock and ice. We consider effects like brittle failure, fragmentation, and merging in different impact scenarios. After validating our code against previously published results we present first collision results based on measured values for the Weibull flaw distribution parameters of basalt.","authors_text":"\\'Aron S\\\"uli, Christoph Sch\\\"afer, Emese Forg\\'acs-Dajka, Roland Speith, Rudolf Dvorak, Thomas I. Maindl","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-27T18:03:54Z","title":"SPH-based simulation of multi-material asteroid collisions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.6587","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:ab0c65a9bbdd9d875a0913ce3d284e2c749a4612e329c0a24dfd4cbca3bd1020","target":"record","created_at":"2026-05-18T03:03:32Z","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":"f4aa89ac2a78b60eb90661cb32fece2ff4a047a872cfc9703881beec91ae9bda","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2013-06-27T18:03:54Z","title_canon_sha256":"cf70fb268924742d81c0b21cfa6592219fdf0193e2996e00196672e5b11d93cb"},"schema_version":"1.0","source":{"id":"1306.6587","kind":"arxiv","version":1}},"canonical_sha256":"7a15596379184a9de48345b2c007cc55249fb9425eae08ab2186e16c163ebc5f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7a15596379184a9de48345b2c007cc55249fb9425eae08ab2186e16c163ebc5f","first_computed_at":"2026-05-18T03:03:32.007347Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:03:32.007347Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yyL+H7nVxzvzhkmcxCo/9kX9/5fz0T4EDlj10ZkJFkc7fDaiM4sBLK+vKPndLDT9B+Xw0XkgVntcHLjTdcXfDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:03:32.008182Z","signed_message":"canonical_sha256_bytes"},"source_id":"1306.6587","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab0c65a9bbdd9d875a0913ce3d284e2c749a4612e329c0a24dfd4cbca3bd1020","sha256:2805232d09c7f94f4ea3b89135b7254bfafda9abbd55cf349eefe497d3930353"],"state_sha256":"bfd97a175299414b4619612351efa311ca11a00f3e0698530e03d6e782b768b7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GIwQS2UWDCab724GJ9J6TcEPX3IWZAR/Y7pDnpvIepblStbqua/oADdzVHiNLAZc4ZxyMQxZ1kjcMVYeKtMfDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T11:17:49.837729Z","bundle_sha256":"03da8ccce1f41e534901f015428c1a7a751db50f6a8060e0cc57dbd8d9cd5cdd"}}