{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:2BZJZ6FI2L6CLPR7W2HII3ZADK","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":"228cf319fe73c6e9146393ed2dc3b611b8cdf08665e2269847effea407b24046","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-11-07T07:23:45Z","title_canon_sha256":"983d793a5acff532a073b626b08711cc24b7b819c219d7e81707ebb8cb84db75"},"schema_version":"1.0","source":{"id":"1711.02320","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.02320","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"arxiv_version","alias_value":"1711.02320v2","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.02320","created_at":"2026-05-18T00:27:41Z"},{"alias_kind":"pith_short_12","alias_value":"2BZJZ6FI2L6C","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_16","alias_value":"2BZJZ6FI2L6CLPR7","created_at":"2026-05-18T12:30:55Z"},{"alias_kind":"pith_short_8","alias_value":"2BZJZ6FI","created_at":"2026-05-18T12:30:55Z"}],"graph_snapshots":[{"event_id":"sha256:9d13a696f7076336d59e9e934a257709003532ac226220ab0f731d29d4004611","target":"graph","created_at":"2026-05-18T00:27:41Z","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":"1I/2017 U1 (`Oumuamua), a recently discovered asteroid in a hyperbolic orbit, is likely the first macroscopic object of extrasolar origin identified in the solar system. Here, we present imaging and spectroscopic observations of \\textquoteleft Oumuamua using the Palomar Hale Telescope as well as a search of meteor activity potentially linked to this object using the Canadian Meteor Orbit Radar. We find that \\textquoteleft Oumuamua exhibits a moderate spectral gradient of $10\\%\\pm6\\%~(100~\\mathrm{nm})^{-1}$, a value significantly lower than that of outer solar system bodies, indicative of a for","authors_text":"Michael S. P. Kelley, Peter G. Brown, Qicheng Zhang, Quan-Zhi Ye","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-11-07T07:23:45Z","title":"1I/2017 U1 (`Oumuamua) is Hot: Imaging, Spectroscopy and Search of Meteor Activity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.02320","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":"sha256:01c97b9439f981e9d885997a9956f36ba7598fa1e140fe12c6212cf8c4caab49","target":"record","created_at":"2026-05-18T00:27:41Z","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":"228cf319fe73c6e9146393ed2dc3b611b8cdf08665e2269847effea407b24046","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2017-11-07T07:23:45Z","title_canon_sha256":"983d793a5acff532a073b626b08711cc24b7b819c219d7e81707ebb8cb84db75"},"schema_version":"1.0","source":{"id":"1711.02320","kind":"arxiv","version":2}},"canonical_sha256":"d0729cf8a8d2fc25be3fb68e846f201a95a7de27ed275b9b490aa99d3b870a4e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d0729cf8a8d2fc25be3fb68e846f201a95a7de27ed275b9b490aa99d3b870a4e","first_computed_at":"2026-05-18T00:27:41.820979Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:27:41.820979Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jZFBprj3jhkdCSoJmBlLqJjpAJ/asuFdEXsx47k5B4qiXj7ubBgHolA89i//7xiwiJM4gNPRSpLDOkO//frQBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:27:41.821774Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.02320","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:01c97b9439f981e9d885997a9956f36ba7598fa1e140fe12c6212cf8c4caab49","sha256:9d13a696f7076336d59e9e934a257709003532ac226220ab0f731d29d4004611"],"state_sha256":"584ce58fe0629ddfbe54c273c2e88a1e8fd0345f63ee83166fb41f223d1ae6ec"}