{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:K4S3IBSGSTAPY55E7IXZWNKO7H","short_pith_number":"pith:K4S3IBSG","canonical_record":{"source":{"id":"1802.00458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-01T19:01:20Z","cross_cats_sorted":[],"title_canon_sha256":"10e2b8e78f5e4d1aaaaf88933cf0ecf6b12221470ffd659df7b40c0cc2bd40b3","abstract_canon_sha256":"dcf7a218dc07aecced222715ca3e857384f0f8a310f18f855d186bb025ca5a7e"},"schema_version":"1.0"},"canonical_sha256":"5725b4064694c0fc77a4fa2f9b354ef9de69ce251dad70429b429a9f37313926","source":{"kind":"arxiv","id":"1802.00458","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00458","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00458v1","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00458","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"pith_short_12","alias_value":"K4S3IBSGSTAP","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"K4S3IBSGSTAPY55E","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"K4S3IBSG","created_at":"2026-05-18T12:32:33Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:K4S3IBSGSTAPY55E7IXZWNKO7H","target":"record","payload":{"canonical_record":{"source":{"id":"1802.00458","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-01T19:01:20Z","cross_cats_sorted":[],"title_canon_sha256":"10e2b8e78f5e4d1aaaaf88933cf0ecf6b12221470ffd659df7b40c0cc2bd40b3","abstract_canon_sha256":"dcf7a218dc07aecced222715ca3e857384f0f8a310f18f855d186bb025ca5a7e"},"schema_version":"1.0"},"canonical_sha256":"5725b4064694c0fc77a4fa2f9b354ef9de69ce251dad70429b429a9f37313926","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:19:21.297821Z","signature_b64":"pmw5tvHoFEuk5xwvjYDQ+w3K6LGMijAhYliIK+Ij3R4lZ4+8WMbwjW4ToOod1Usgsok2PCkbTMp9EZAYLVN7DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5725b4064694c0fc77a4fa2f9b354ef9de69ce251dad70429b429a9f37313926","last_reissued_at":"2026-05-18T00:19:21.297267Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:19:21.297267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.00458","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":"2026-05-18T00:19:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gqnr9pp/Y3eGklq40kF9w9GOicwCzsFdi8VpD7HYE60LvQUyA9QhJ0YOnljVxITVUSOmjaLAeNLEFgt3311tAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:56:31.757465Z"},"content_sha256":"1a566108f661b1436e6c580a154473922aad8fc3bf3197b707788d10ac8c4a13","schema_version":"1.0","event_id":"sha256:1a566108f661b1436e6c580a154473922aad8fc3bf3197b707788d10ac8c4a13"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:K4S3IBSGSTAPY55E7IXZWNKO7H","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Deflector Selector: A Machine Learning Framework for Prioritizing Hazardous Object Deflection Technology Development","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Adam Greenberg, Elmarie van Heerden, Eric Dahlstrom, Erika R. Nesvold, Franck Marchis, J. L. Galache, Nicolas Erasmus","submitted_at":"2018-02-01T19:01:20Z","abstract_excerpt":"Several technologies have been proposed for deflecting a hazardous Solar System object on a trajectory that would otherwise impact the Earth. The effectiveness of each technology depends on several characteristics of the given object, including its orbit and size. The distribution of these parameters in the likely population of Earth-impacting objects can thus determine which of the technologies are most likely to be useful in preventing a collision with the Earth. None of the proposed deflection technologies has been developed and fully tested in space. Developing every proposed technology is"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00458","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":"2026-05-18T00:19:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"83vYHVZbtHN0q9+m0H+QjaMv8xcMlPlrAsKDp/LdbXkr+MY1Jo3bop994gDlyCEhLEbECNTmrNEBvl7nIY58Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T14:56:31.758074Z"},"content_sha256":"4331b9df2fc23938af1f70541567f68c97ac687879b1bc836e616f1ca0fc18a7","schema_version":"1.0","event_id":"sha256:4331b9df2fc23938af1f70541567f68c97ac687879b1bc836e616f1ca0fc18a7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/bundle.json","state_url":"https://pith.science/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/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":"2026-05-28T14:56:31Z","links":{"resolver":"https://pith.science/pith/K4S3IBSGSTAPY55E7IXZWNKO7H","bundle":"https://pith.science/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/bundle.json","state":"https://pith.science/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4S3IBSGSTAPY55E7IXZWNKO7H/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:K4S3IBSGSTAPY55E7IXZWNKO7H","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":"dcf7a218dc07aecced222715ca3e857384f0f8a310f18f855d186bb025ca5a7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-01T19:01:20Z","title_canon_sha256":"10e2b8e78f5e4d1aaaaf88933cf0ecf6b12221470ffd659df7b40c0cc2bd40b3"},"schema_version":"1.0","source":{"id":"1802.00458","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.00458","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"arxiv_version","alias_value":"1802.00458v1","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.00458","created_at":"2026-05-18T00:19:21Z"},{"alias_kind":"pith_short_12","alias_value":"K4S3IBSGSTAP","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_16","alias_value":"K4S3IBSGSTAPY55E","created_at":"2026-05-18T12:32:33Z"},{"alias_kind":"pith_short_8","alias_value":"K4S3IBSG","created_at":"2026-05-18T12:32:33Z"}],"graph_snapshots":[{"event_id":"sha256:4331b9df2fc23938af1f70541567f68c97ac687879b1bc836e616f1ca0fc18a7","target":"graph","created_at":"2026-05-18T00:19:21Z","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":"Several technologies have been proposed for deflecting a hazardous Solar System object on a trajectory that would otherwise impact the Earth. The effectiveness of each technology depends on several characteristics of the given object, including its orbit and size. The distribution of these parameters in the likely population of Earth-impacting objects can thus determine which of the technologies are most likely to be useful in preventing a collision with the Earth. None of the proposed deflection technologies has been developed and fully tested in space. Developing every proposed technology is","authors_text":"Adam Greenberg, Elmarie van Heerden, Eric Dahlstrom, Erika R. Nesvold, Franck Marchis, J. L. Galache, Nicolas Erasmus","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-01T19:01:20Z","title":"The Deflector Selector: A Machine Learning Framework for Prioritizing Hazardous Object Deflection Technology Development"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.00458","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":"sha256:1a566108f661b1436e6c580a154473922aad8fc3bf3197b707788d10ac8c4a13","target":"record","created_at":"2026-05-18T00:19:21Z","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":"dcf7a218dc07aecced222715ca3e857384f0f8a310f18f855d186bb025ca5a7e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2018-02-01T19:01:20Z","title_canon_sha256":"10e2b8e78f5e4d1aaaaf88933cf0ecf6b12221470ffd659df7b40c0cc2bd40b3"},"schema_version":"1.0","source":{"id":"1802.00458","kind":"arxiv","version":1}},"canonical_sha256":"5725b4064694c0fc77a4fa2f9b354ef9de69ce251dad70429b429a9f37313926","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5725b4064694c0fc77a4fa2f9b354ef9de69ce251dad70429b429a9f37313926","first_computed_at":"2026-05-18T00:19:21.297267Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:21.297267Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pmw5tvHoFEuk5xwvjYDQ+w3K6LGMijAhYliIK+Ij3R4lZ4+8WMbwjW4ToOod1Usgsok2PCkbTMp9EZAYLVN7DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:21.297821Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.00458","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a566108f661b1436e6c580a154473922aad8fc3bf3197b707788d10ac8c4a13","sha256:4331b9df2fc23938af1f70541567f68c97ac687879b1bc836e616f1ca0fc18a7"],"state_sha256":"20e39aabc7cca5490d8f788a0763aceff6946063b89805c48f26387f12101702"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JJ/lvQJHmMED0DXzvbiJ9UjbXuxn0o15VU8PMMQYWFstb/8HYehrOdvZezoUbwOBrGpETpgFycMSDMTwhXl2Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T14:56:31.760624Z","bundle_sha256":"53bc3c12ee95ec27be2f8bc8a33be279e75e11b0db4d8a46bb49c20ec2a7cd2c"}}