{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:RAINZQX4D2LOMYL53BZWD23ZMJ","short_pith_number":"pith:RAINZQX4","canonical_record":{"source":{"id":"1610.08043","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-10-26T11:21:42Z","cross_cats_sorted":[],"title_canon_sha256":"453366f14f08e3b80a29a21cbc61da68dc27b2ddab2c6a521727832b3982327d","abstract_canon_sha256":"8ee484d8078773da10507ed63df08788850de888cb346bc3683fc0881840d694"},"schema_version":"1.0"},"canonical_sha256":"8810dcc2fc1e96e6617dd87361eb7962706d30e15636c6a1d918b5984abd91a8","source":{"kind":"arxiv","id":"1610.08043","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.08043","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"arxiv_version","alias_value":"1610.08043v4","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.08043","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"pith_short_12","alias_value":"RAINZQX4D2LO","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RAINZQX4D2LOMYL5","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RAINZQX4","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:RAINZQX4D2LOMYL53BZWD23ZMJ","target":"record","payload":{"canonical_record":{"source":{"id":"1610.08043","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-10-26T11:21:42Z","cross_cats_sorted":[],"title_canon_sha256":"453366f14f08e3b80a29a21cbc61da68dc27b2ddab2c6a521727832b3982327d","abstract_canon_sha256":"8ee484d8078773da10507ed63df08788850de888cb346bc3683fc0881840d694"},"schema_version":"1.0"},"canonical_sha256":"8810dcc2fc1e96e6617dd87361eb7962706d30e15636c6a1d918b5984abd91a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:59:18.549971Z","signature_b64":"2d8FNF+ECuiu88Eq1Fs4srSNpAK/BkpzvVAgn4EuCan+iEZbliLM3krpMd7NgyB46dVljt9cv9vZobzNgWPZDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8810dcc2fc1e96e6617dd87361eb7962706d30e15636c6a1d918b5984abd91a8","last_reissued_at":"2026-05-18T00:59:18.549298Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:59:18.549298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1610.08043","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:59:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9pdvmxcfuOD5eJ2dZQ0UvFK5ZPbS+Xe4Ns7Jg1oQ2Wb/bH1Nfyn4GSAinwvx4R2AxOp5eXx1wlB6ABTTUn71Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T04:05:25.439013Z"},"content_sha256":"1f63e34d09ef86bc646f15d46f888b3ba84e1f58e86ceae8ec56a4c3df1c6007","schema_version":"1.0","event_id":"sha256:1f63e34d09ef86bc646f15d46f888b3ba84e1f58e86ceae8ec56a4c3df1c6007"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:RAINZQX4D2LOMYL53BZWD23ZMJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the stability of a space vehicle riding on an intense laser beam","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"H. Popova, I. Gabitov, M. Efendiev","submitted_at":"2016-10-26T11:21:42Z","abstract_excerpt":"The Breakthrough Starshot Initiative is suggested to develop the concept of propelling a nano-scale spacecraft by the radiation pressure of an intense laser beam. If such a nanocraft could be accelerated to 20 percent of light speed, it could reach the vicinity of our nearest potentially habitable exoplanet within our life time and capture its images and obtain other scientific data. In this project the nanocraft is a gram-scale robotic spacecraft comprising two main parts: StarChip and Lightsail.\n  To achieve the goal of the project it is necessary to solve a number of outstanding scientific "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.08043","kind":"arxiv","version":4},"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":"2026-05-18T00:59:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jKeXl8cdjre+YqkbK27cG0wx8eN76HxML3oXlRv9hl1tDZ6ep+6FX3M+uRzxq9LB4lKgkBPiwOYCLrQ69ms0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-22T04:05:25.439714Z"},"content_sha256":"bea420bfad3a6bfa5d5835021795b5c0432078744ed8ff66c144fdb9256533dd","schema_version":"1.0","event_id":"sha256:bea420bfad3a6bfa5d5835021795b5c0432078744ed8ff66c144fdb9256533dd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/bundle.json","state_url":"https://pith.science/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/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":"2026-05-22T04:05:25Z","links":{"resolver":"https://pith.science/pith/RAINZQX4D2LOMYL53BZWD23ZMJ","bundle":"https://pith.science/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/bundle.json","state":"https://pith.science/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RAINZQX4D2LOMYL53BZWD23ZMJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:RAINZQX4D2LOMYL53BZWD23ZMJ","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":"8ee484d8078773da10507ed63df08788850de888cb346bc3683fc0881840d694","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-10-26T11:21:42Z","title_canon_sha256":"453366f14f08e3b80a29a21cbc61da68dc27b2ddab2c6a521727832b3982327d"},"schema_version":"1.0","source":{"id":"1610.08043","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.08043","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"arxiv_version","alias_value":"1610.08043v4","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.08043","created_at":"2026-05-18T00:59:18Z"},{"alias_kind":"pith_short_12","alias_value":"RAINZQX4D2LO","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RAINZQX4D2LOMYL5","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RAINZQX4","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:bea420bfad3a6bfa5d5835021795b5c0432078744ed8ff66c144fdb9256533dd","target":"graph","created_at":"2026-05-18T00:59:18Z","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":"The Breakthrough Starshot Initiative is suggested to develop the concept of propelling a nano-scale spacecraft by the radiation pressure of an intense laser beam. If such a nanocraft could be accelerated to 20 percent of light speed, it could reach the vicinity of our nearest potentially habitable exoplanet within our life time and capture its images and obtain other scientific data. In this project the nanocraft is a gram-scale robotic spacecraft comprising two main parts: StarChip and Lightsail.\n  To achieve the goal of the project it is necessary to solve a number of outstanding scientific ","authors_text":"H. Popova, I. Gabitov, M. Efendiev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-10-26T11:21:42Z","title":"On the stability of a space vehicle riding on an intense laser beam"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.08043","kind":"arxiv","version":4},"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":"sha256:1f63e34d09ef86bc646f15d46f888b3ba84e1f58e86ceae8ec56a4c3df1c6007","target":"record","created_at":"2026-05-18T00:59:18Z","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":"8ee484d8078773da10507ed63df08788850de888cb346bc3683fc0881840d694","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-10-26T11:21:42Z","title_canon_sha256":"453366f14f08e3b80a29a21cbc61da68dc27b2ddab2c6a521727832b3982327d"},"schema_version":"1.0","source":{"id":"1610.08043","kind":"arxiv","version":4}},"canonical_sha256":"8810dcc2fc1e96e6617dd87361eb7962706d30e15636c6a1d918b5984abd91a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8810dcc2fc1e96e6617dd87361eb7962706d30e15636c6a1d918b5984abd91a8","first_computed_at":"2026-05-18T00:59:18.549298Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:59:18.549298Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2d8FNF+ECuiu88Eq1Fs4srSNpAK/BkpzvVAgn4EuCan+iEZbliLM3krpMd7NgyB46dVljt9cv9vZobzNgWPZDA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:59:18.549971Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.08043","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1f63e34d09ef86bc646f15d46f888b3ba84e1f58e86ceae8ec56a4c3df1c6007","sha256:bea420bfad3a6bfa5d5835021795b5c0432078744ed8ff66c144fdb9256533dd"],"state_sha256":"75887bd1f667fb4f235f7f173f7af9de259712ebab4523184f5711c699c34a60"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d1TnqXO33mBybn0bLjC/2BezxEAfeAEtGbEeSkvvs5vsIxfeiN4ZSNxknhimXqCANibTpf7xEG+E+KANiG8yBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-22T04:05:25.443244Z","bundle_sha256":"7287aea02667b0a0e88e89a722552a0b1331485514833ec82d384629d8b615fe"}}