{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:XNTLRRPDCPPFDVGP2HPJLRBH3M","short_pith_number":"pith:XNTLRRPD","canonical_record":{"source":{"id":"2007.05407","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-10T14:24:57Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"4a8968d1778fb7000cb1d4440f69b5caec325b8a4ae4694149bf341d01bdaaae","abstract_canon_sha256":"9f7327d4d2c19bec29e08c2d45c5a75bcfdfb1470786c676245adc407a800d8a"},"schema_version":"1.0"},"canonical_sha256":"bb66b8c5e313de51d4cfd1de95c427db25a3caa598acbf727b52f5243caf3350","source":{"kind":"arxiv","id":"2007.05407","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.05407","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"arxiv_version","alias_value":"2007.05407v1","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.05407","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_12","alias_value":"XNTLRRPDCPPF","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_16","alias_value":"XNTLRRPDCPPFDVGP","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_8","alias_value":"XNTLRRPD","created_at":"2026-07-05T01:17:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:XNTLRRPDCPPFDVGP2HPJLRBH3M","target":"record","payload":{"canonical_record":{"source":{"id":"2007.05407","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-10T14:24:57Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"4a8968d1778fb7000cb1d4440f69b5caec325b8a4ae4694149bf341d01bdaaae","abstract_canon_sha256":"9f7327d4d2c19bec29e08c2d45c5a75bcfdfb1470786c676245adc407a800d8a"},"schema_version":"1.0"},"canonical_sha256":"bb66b8c5e313de51d4cfd1de95c427db25a3caa598acbf727b52f5243caf3350","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:17:46.303535Z","signature_b64":"IXcsBcVddp4kZP/SKMwvgRCv0JW65yh/2bbXvkVpPWLM268nF/RRoznj3vNxNNB18muR8nFoKXqvBsrx3hV6BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bb66b8c5e313de51d4cfd1de95c427db25a3caa598acbf727b52f5243caf3350","last_reissued_at":"2026-07-05T01:17:46.303083Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:17:46.303083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.05407","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":"2026-07-05T01:17:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8624FLW2+zofv1xUGusgTpBu9YAWjzQuNmXIhIrjIzUj9BidQ2KpJnkpV52KUqOkmwJKL1Yu3E6Vjc67vuToDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:56:13.973154Z"},"content_sha256":"92d04775c0c9af03f618ae39ab54157b42987765b157f5fa3194ad6dc976d20c","schema_version":"1.0","event_id":"sha256:92d04775c0c9af03f618ae39ab54157b42987765b157f5fa3194ad6dc976d20c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:XNTLRRPDCPPFDVGP2HPJLRBH3M","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Use of the Semilinear Method to predict the Impact Corridor on Ground","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.EP","authors_text":"A. Del Vigna, D. Bracali Cioci, F. Bernardi, L. Dimare","submitted_at":"2020-07-10T14:24:57Z","abstract_excerpt":"We propose an adaptation of the semilinear algorithm for the prediction of the impact corridor on ground of an Earth-impacting asteroid. The proposed algorithm provides an efficient tool, able to reliably predict the impact regions at fixed altitudes above ground with 5 orders of magnitudes less computations than Monte Carlo approaches. Efficiency is crucial when dealing with imminent impactors, which are characterized by high impact probabilities and impact times very close to the times of discovery. The case of 2008 TC3 is a remarkable example, but there are also recent cases of imminent imp"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.05407","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2007.05407/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:17:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"owVUISC26HzbXuZVvecSwLkQSwfsoSxzNDHl0pNvjFIaPUEFxCew9HJ8Elb3L9tO/43AOpS2r5UPlMNYaqHSCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-12T04:56:13.973677Z"},"content_sha256":"c052a5771a242b6b80447f566ee3db01c99f25874c8af08c290171b207266883","schema_version":"1.0","event_id":"sha256:c052a5771a242b6b80447f566ee3db01c99f25874c8af08c290171b207266883"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/bundle.json","state_url":"https://pith.science/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/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":"2026-08-12T04:56:13Z","links":{"resolver":"https://pith.science/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M","bundle":"https://pith.science/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/bundle.json","state":"https://pith.science/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XNTLRRPDCPPFDVGP2HPJLRBH3M/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:XNTLRRPDCPPFDVGP2HPJLRBH3M","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":"9f7327d4d2c19bec29e08c2d45c5a75bcfdfb1470786c676245adc407a800d8a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-10T14:24:57Z","title_canon_sha256":"4a8968d1778fb7000cb1d4440f69b5caec325b8a4ae4694149bf341d01bdaaae"},"schema_version":"1.0","source":{"id":"2007.05407","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.05407","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"arxiv_version","alias_value":"2007.05407v1","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.05407","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_12","alias_value":"XNTLRRPDCPPF","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_16","alias_value":"XNTLRRPDCPPFDVGP","created_at":"2026-07-05T01:17:46Z"},{"alias_kind":"pith_short_8","alias_value":"XNTLRRPD","created_at":"2026-07-05T01:17:46Z"}],"graph_snapshots":[{"event_id":"sha256:c052a5771a242b6b80447f566ee3db01c99f25874c8af08c290171b207266883","target":"graph","created_at":"2026-07-05T01:17:46Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.05407/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose an adaptation of the semilinear algorithm for the prediction of the impact corridor on ground of an Earth-impacting asteroid. The proposed algorithm provides an efficient tool, able to reliably predict the impact regions at fixed altitudes above ground with 5 orders of magnitudes less computations than Monte Carlo approaches. Efficiency is crucial when dealing with imminent impactors, which are characterized by high impact probabilities and impact times very close to the times of discovery. The case of 2008 TC3 is a remarkable example, but there are also recent cases of imminent imp","authors_text":"A. Del Vigna, D. Bracali Cioci, F. Bernardi, L. Dimare","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-10T14:24:57Z","title":"Use of the Semilinear Method to predict the Impact Corridor on Ground"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.05407","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":"sha256:92d04775c0c9af03f618ae39ab54157b42987765b157f5fa3194ad6dc976d20c","target":"record","created_at":"2026-07-05T01:17:46Z","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":"9f7327d4d2c19bec29e08c2d45c5a75bcfdfb1470786c676245adc407a800d8a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2020-07-10T14:24:57Z","title_canon_sha256":"4a8968d1778fb7000cb1d4440f69b5caec325b8a4ae4694149bf341d01bdaaae"},"schema_version":"1.0","source":{"id":"2007.05407","kind":"arxiv","version":1}},"canonical_sha256":"bb66b8c5e313de51d4cfd1de95c427db25a3caa598acbf727b52f5243caf3350","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb66b8c5e313de51d4cfd1de95c427db25a3caa598acbf727b52f5243caf3350","first_computed_at":"2026-07-05T01:17:46.303083Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:17:46.303083Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IXcsBcVddp4kZP/SKMwvgRCv0JW65yh/2bbXvkVpPWLM268nF/RRoznj3vNxNNB18muR8nFoKXqvBsrx3hV6BA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:17:46.303535Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.05407","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92d04775c0c9af03f618ae39ab54157b42987765b157f5fa3194ad6dc976d20c","sha256:c052a5771a242b6b80447f566ee3db01c99f25874c8af08c290171b207266883"],"state_sha256":"45830529d6a79afebcf8fbc0d3d0e299db49805bcb72c48d53213f19ad58b5ae"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ClQzUFEwtWE4h9m2h/wf8V7lJJCFQ53SJm8tW3cguhWVWp4sp0/fPIN1OYohtf/lJJd+LuiIhZuemk1v3ogEDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-12T04:56:13.978912Z","bundle_sha256":"07a2959ce892265bbf3b43d04bd09b8e59d061c56bee85d24894091d4a9ca45b"}}