{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:J5ET5KPYPL22VH62KNOWBAVBLY","short_pith_number":"pith:J5ET5KPY","canonical_record":{"source":{"id":"2112.09373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-17T08:05:47Z","cross_cats_sorted":[],"title_canon_sha256":"cfebabb674332cb842fd3a511de08434801afb0c2b2cab6b91606abe6cf16cb6","abstract_canon_sha256":"11f10f3707c9157f92648a15ae515ac336cbe599983c271ec1aeac7f0be1685e"},"schema_version":"1.0"},"canonical_sha256":"4f493ea9f87af5aa9fda535d6082a15e0083d335493adf10e3e5e37352cd260b","source":{"kind":"arxiv","id":"2112.09373","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.09373","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"arxiv_version","alias_value":"2112.09373v1","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.09373","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_12","alias_value":"J5ET5KPYPL22","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_16","alias_value":"J5ET5KPYPL22VH62","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_8","alias_value":"J5ET5KPY","created_at":"2026-07-05T03:41:45Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:J5ET5KPYPL22VH62KNOWBAVBLY","target":"record","payload":{"canonical_record":{"source":{"id":"2112.09373","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-17T08:05:47Z","cross_cats_sorted":[],"title_canon_sha256":"cfebabb674332cb842fd3a511de08434801afb0c2b2cab6b91606abe6cf16cb6","abstract_canon_sha256":"11f10f3707c9157f92648a15ae515ac336cbe599983c271ec1aeac7f0be1685e"},"schema_version":"1.0"},"canonical_sha256":"4f493ea9f87af5aa9fda535d6082a15e0083d335493adf10e3e5e37352cd260b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:41:45.566662Z","signature_b64":"etirxNjcSQvDUl80Pm1FN603jMT/hDGmSiTF+wPQsErUUIkycNEVb9nZpX6riAoB+fBOq4d80yC8x7XqpiyxCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4f493ea9f87af5aa9fda535d6082a15e0083d335493adf10e3e5e37352cd260b","last_reissued_at":"2026-07-05T03:41:45.566206Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:41:45.566206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.09373","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":"2026-07-05T03:41:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dU+btpkSMMGO4UDNsRGLPbNm8Xw2mPHVCpV4wabrz4ieXT7DQ3vlrXTXjKGltggk+gc8mbYsuS/CWpNnipWYAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:19:05.345288Z"},"content_sha256":"7aceb179d34b14cfac095d1844044bd0558e0a631cd694dda685e471df538141","schema_version":"1.0","event_id":"sha256:7aceb179d34b14cfac095d1844044bd0558e0a631cd694dda685e471df538141"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:J5ET5KPYPL22VH62KNOWBAVBLY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"EUSO-SPB2 Telescope Optics and Testing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Angela V. Olinto, Chantal Wang, Jerod Brewster, Johannes Eser, Julianna Desiato, Justin Pace, Lawrence Wiencke (on behalf of the JEM-EUSO Collaboration), Lindsey Huelett, Madeline Dawes, Miroslav Pech, Patrick Reardon, Petr Schovanek, Randy Bachman, Viktoria Kungel, William Finch","submitted_at":"2021-12-17T08:05:47Z","abstract_excerpt":"The Extreme Universe Space Observatory - Super Pressure Balloon (EUSO-SPB2) mission will fly two custom telescopes that feature Schmidt optics to measure \\v{C}erenkov- and fluorescence-emission of extensive air-showers from cosmic rays at the PeV and EeV-scale, and search for tau-neutrinos. Both telescopes have 1-meter diameter apertures and UV/UV-visible sensitivity. The \\v{C}erenkov telescope uses a bifocal mirror segment alignment, to distinguish between a direct cosmic ray that hits the camera versus the \\v{C}erenkov light from outside the telescope. Telescope integration and laboratory ca"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.09373","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/2112.09373/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":"2026-07-05T03:41:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Zliq0DGF7X9YzR01KNucR6m4LD+V4S25XcXkUJ6OI98xeDoqnx/+IDURvO7LdrOX2lGiEh2xOCQWJGn3K4IAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T17:19:05.349306Z"},"content_sha256":"6369ff759261daa4be6d392152f2b1bced1b30e3c8089ca17720bd408909c390","schema_version":"1.0","event_id":"sha256:6369ff759261daa4be6d392152f2b1bced1b30e3c8089ca17720bd408909c390"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/J5ET5KPYPL22VH62KNOWBAVBLY/bundle.json","state_url":"https://pith.science/pith/J5ET5KPYPL22VH62KNOWBAVBLY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/J5ET5KPYPL22VH62KNOWBAVBLY/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":"2026-08-05T17:19:05Z","links":{"resolver":"https://pith.science/pith/J5ET5KPYPL22VH62KNOWBAVBLY","bundle":"https://pith.science/pith/J5ET5KPYPL22VH62KNOWBAVBLY/bundle.json","state":"https://pith.science/pith/J5ET5KPYPL22VH62KNOWBAVBLY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/J5ET5KPYPL22VH62KNOWBAVBLY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:J5ET5KPYPL22VH62KNOWBAVBLY","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":"11f10f3707c9157f92648a15ae515ac336cbe599983c271ec1aeac7f0be1685e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-17T08:05:47Z","title_canon_sha256":"cfebabb674332cb842fd3a511de08434801afb0c2b2cab6b91606abe6cf16cb6"},"schema_version":"1.0","source":{"id":"2112.09373","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.09373","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"arxiv_version","alias_value":"2112.09373v1","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.09373","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_12","alias_value":"J5ET5KPYPL22","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_16","alias_value":"J5ET5KPYPL22VH62","created_at":"2026-07-05T03:41:45Z"},{"alias_kind":"pith_short_8","alias_value":"J5ET5KPY","created_at":"2026-07-05T03:41:45Z"}],"graph_snapshots":[{"event_id":"sha256:6369ff759261daa4be6d392152f2b1bced1b30e3c8089ca17720bd408909c390","target":"graph","created_at":"2026-07-05T03:41:45Z","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/2112.09373/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Extreme Universe Space Observatory - Super Pressure Balloon (EUSO-SPB2) mission will fly two custom telescopes that feature Schmidt optics to measure \\v{C}erenkov- and fluorescence-emission of extensive air-showers from cosmic rays at the PeV and EeV-scale, and search for tau-neutrinos. Both telescopes have 1-meter diameter apertures and UV/UV-visible sensitivity. The \\v{C}erenkov telescope uses a bifocal mirror segment alignment, to distinguish between a direct cosmic ray that hits the camera versus the \\v{C}erenkov light from outside the telescope. Telescope integration and laboratory ca","authors_text":"Angela V. Olinto, Chantal Wang, Jerod Brewster, Johannes Eser, Julianna Desiato, Justin Pace, Lawrence Wiencke (on behalf of the JEM-EUSO Collaboration), Lindsey Huelett, Madeline Dawes, Miroslav Pech, Patrick Reardon, Petr Schovanek, Randy Bachman, Viktoria Kungel, William Finch","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-17T08:05:47Z","title":"EUSO-SPB2 Telescope Optics and Testing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.09373","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":"sha256:7aceb179d34b14cfac095d1844044bd0558e0a631cd694dda685e471df538141","target":"record","created_at":"2026-07-05T03:41:45Z","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":"11f10f3707c9157f92648a15ae515ac336cbe599983c271ec1aeac7f0be1685e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-12-17T08:05:47Z","title_canon_sha256":"cfebabb674332cb842fd3a511de08434801afb0c2b2cab6b91606abe6cf16cb6"},"schema_version":"1.0","source":{"id":"2112.09373","kind":"arxiv","version":1}},"canonical_sha256":"4f493ea9f87af5aa9fda535d6082a15e0083d335493adf10e3e5e37352cd260b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4f493ea9f87af5aa9fda535d6082a15e0083d335493adf10e3e5e37352cd260b","first_computed_at":"2026-07-05T03:41:45.566206Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:41:45.566206Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"etirxNjcSQvDUl80Pm1FN603jMT/hDGmSiTF+wPQsErUUIkycNEVb9nZpX6riAoB+fBOq4d80yC8x7XqpiyxCA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:41:45.566662Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.09373","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7aceb179d34b14cfac095d1844044bd0558e0a631cd694dda685e471df538141","sha256:6369ff759261daa4be6d392152f2b1bced1b30e3c8089ca17720bd408909c390"],"state_sha256":"989ed705987c9c934e07c4f492747ee3bd9d54d08f9e0ba95607d2321e12766f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qyeORseUPenojo56slBN4MQpyadci/n5f1+lDdZI/bAbjJhCh/nr6XxdO0FN9I7FRodKyhE8kSGtTMoJ7X7xCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T17:19:05.357233Z","bundle_sha256":"3ddbaaa02e7b7d002acedc22541e20209adc219483d018f3aac8be13b36c3eef"}}