{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:GNCCYPABWFZ37SFYG45BDNDZEQ","short_pith_number":"pith:GNCCYPAB","canonical_record":{"source":{"id":"1908.08543","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-22T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"cbb569ed41031b93efb8c9f874c03a55b6d6189fa18ad105dd6accd4b5a58826","abstract_canon_sha256":"7012c58485c346a0a1249437888598a218fbb982664ee8ec7bd1d552a99c3c9f"},"schema_version":"1.0"},"canonical_sha256":"33442c3c01b173bfc8b8373a11b479241578aaf9efb9a876aae001643377921b","source":{"kind":"arxiv","id":"1908.08543","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08543","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08543v2","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08543","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"GNCCYPABWFZ3","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_16","alias_value":"GNCCYPABWFZ37SFY","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_8","alias_value":"GNCCYPAB","created_at":"2026-07-05T01:04:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:GNCCYPABWFZ37SFYG45BDNDZEQ","target":"record","payload":{"canonical_record":{"source":{"id":"1908.08543","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-22T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"cbb569ed41031b93efb8c9f874c03a55b6d6189fa18ad105dd6accd4b5a58826","abstract_canon_sha256":"7012c58485c346a0a1249437888598a218fbb982664ee8ec7bd1d552a99c3c9f"},"schema_version":"1.0"},"canonical_sha256":"33442c3c01b173bfc8b8373a11b479241578aaf9efb9a876aae001643377921b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:04:01.066850Z","signature_b64":"Q1E4orFSxED5ir1DrQD0o35+dmykCcky1CZQuMdx+ClJyT6k+Mx2jwVjfvKmJt9DqS8E58q2ybcSS7HahR/NAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33442c3c01b173bfc8b8373a11b479241578aaf9efb9a876aae001643377921b","last_reissued_at":"2026-07-05T01:04:01.066354Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:04:01.066354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.08543","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":"2026-07-05T01:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eBLcgZCjDKvlGhpvxRXjGIWJZVgzG1CpmKG/51xuBWAE3U5IXEJVHGuxtHtra0N1WBb6wN5V/pae4NSLYSlQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:22:50.292011Z"},"content_sha256":"fd7eac3a205016571f9ab2271e4a39301b14f2c881cad1e6056e8c72149cf01b","schema_version":"1.0","event_id":"sha256:fd7eac3a205016571f9ab2271e4a39301b14f2c881cad1e6056e8c72149cf01b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:GNCCYPABWFZ37SFYG45BDNDZEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Real-Time Search for Interstellar Impacts on the Moon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Abraham Loeb, Amir Siraj","submitted_at":"2019-08-22T18:00:01Z","abstract_excerpt":"The discovery of `Oumuamua and CNEOS 2014-01-08 allowed for a calibration of the impact rate of interstellar objects. We propose a new telescope in lunar orbit to study in real-time interstellar meteoroid impacts and to serve as a laboratory for hypervelocity collisions. We show that a telescope with diameter $D_a \\gtrsim 2 \\mathrm{\\; m}$ would be capable of detecting $\\gtrsim 1$ interstellar meteoroid impacts (among hundreds of Solar System meteoroid impacts) per year. For each meteoroid, measurements of the reflected sunlight and shadow, as well as the impact's optical flash and crater, woul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08543","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.08543/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":"2026-07-05T01:04:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WYMJ8XeS/HdeXRDYdi6sg7eBWiMwXgtFvji9NDzqmKLl0DQXZr8zWqPd1UM/DXlvBiQWau6NFobQ594lkvmaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T08:22:50.292520Z"},"content_sha256":"45f364ed4c96d7123f9e6cbabac0cc666877111d5685e3f7961c42a8eb2a506a","schema_version":"1.0","event_id":"sha256:45f364ed4c96d7123f9e6cbabac0cc666877111d5685e3f7961c42a8eb2a506a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/bundle.json","state_url":"https://pith.science/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/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":"2026-08-16T08:22:50Z","links":{"resolver":"https://pith.science/pith/GNCCYPABWFZ37SFYG45BDNDZEQ","bundle":"https://pith.science/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/bundle.json","state":"https://pith.science/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GNCCYPABWFZ37SFYG45BDNDZEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:GNCCYPABWFZ37SFYG45BDNDZEQ","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":"7012c58485c346a0a1249437888598a218fbb982664ee8ec7bd1d552a99c3c9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-22T18:00:01Z","title_canon_sha256":"cbb569ed41031b93efb8c9f874c03a55b6d6189fa18ad105dd6accd4b5a58826"},"schema_version":"1.0","source":{"id":"1908.08543","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.08543","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"arxiv_version","alias_value":"1908.08543v2","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.08543","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_12","alias_value":"GNCCYPABWFZ3","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_16","alias_value":"GNCCYPABWFZ37SFY","created_at":"2026-07-05T01:04:01Z"},{"alias_kind":"pith_short_8","alias_value":"GNCCYPAB","created_at":"2026-07-05T01:04:01Z"}],"graph_snapshots":[{"event_id":"sha256:45f364ed4c96d7123f9e6cbabac0cc666877111d5685e3f7961c42a8eb2a506a","target":"graph","created_at":"2026-07-05T01:04:01Z","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/1908.08543/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The discovery of `Oumuamua and CNEOS 2014-01-08 allowed for a calibration of the impact rate of interstellar objects. We propose a new telescope in lunar orbit to study in real-time interstellar meteoroid impacts and to serve as a laboratory for hypervelocity collisions. We show that a telescope with diameter $D_a \\gtrsim 2 \\mathrm{\\; m}$ would be capable of detecting $\\gtrsim 1$ interstellar meteoroid impacts (among hundreds of Solar System meteoroid impacts) per year. For each meteoroid, measurements of the reflected sunlight and shadow, as well as the impact's optical flash and crater, woul","authors_text":"Abraham Loeb, Amir Siraj","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-22T18:00:01Z","title":"A Real-Time Search for Interstellar Impacts on the Moon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.08543","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:fd7eac3a205016571f9ab2271e4a39301b14f2c881cad1e6056e8c72149cf01b","target":"record","created_at":"2026-07-05T01:04:01Z","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":"7012c58485c346a0a1249437888598a218fbb982664ee8ec7bd1d552a99c3c9f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2019-08-22T18:00:01Z","title_canon_sha256":"cbb569ed41031b93efb8c9f874c03a55b6d6189fa18ad105dd6accd4b5a58826"},"schema_version":"1.0","source":{"id":"1908.08543","kind":"arxiv","version":2}},"canonical_sha256":"33442c3c01b173bfc8b8373a11b479241578aaf9efb9a876aae001643377921b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"33442c3c01b173bfc8b8373a11b479241578aaf9efb9a876aae001643377921b","first_computed_at":"2026-07-05T01:04:01.066354Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:04:01.066354Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Q1E4orFSxED5ir1DrQD0o35+dmykCcky1CZQuMdx+ClJyT6k+Mx2jwVjfvKmJt9DqS8E58q2ybcSS7HahR/NAQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:04:01.066850Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.08543","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd7eac3a205016571f9ab2271e4a39301b14f2c881cad1e6056e8c72149cf01b","sha256:45f364ed4c96d7123f9e6cbabac0cc666877111d5685e3f7961c42a8eb2a506a"],"state_sha256":"2edf2f09e1e306718d98b4640cc8c096e47016c6fdb80dc76eb5666f63923366"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QD6tRf4DAewMrO5drLOaWw/NOM7nhEl/pJSnteAEqK48SVcr5cVu2wR1x8UvM1DvwmUWUQo5WibKUYqLXPpZDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T08:22:50.299069Z","bundle_sha256":"74504550fdc77d97b8f15999f167ad35d559a97d90a822ffbe90fc7ce49f1991"}}