{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:4XO7WUA4UXBNUWLI3ST4RVYSJZ","short_pith_number":"pith:4XO7WUA4","canonical_record":{"source":{"id":"2107.11473","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-07-23T22:15:45Z","cross_cats_sorted":["astro-ph.EP","gr-qc"],"title_canon_sha256":"dfd8ae7ec91344e10760364a4f31e278538dc2bdf0cc04cee20cb04cabf78b30","abstract_canon_sha256":"b70d8e61527129c649732ba6ef3f046483da01c0de3b42ca50b4624890fd0647"},"schema_version":"1.0"},"canonical_sha256":"e5ddfb501ca5c2da5968dca7c8d7124e467638eebdf3b7609e5c1837eda32050","source":{"kind":"arxiv","id":"2107.11473","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.11473","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"2107.11473v1","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.11473","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"4XO7WUA4UXBN","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_16","alias_value":"4XO7WUA4UXBNUWLI","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_8","alias_value":"4XO7WUA4","created_at":"2026-07-05T07:44:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:4XO7WUA4UXBNUWLI3ST4RVYSJZ","target":"record","payload":{"canonical_record":{"source":{"id":"2107.11473","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-07-23T22:15:45Z","cross_cats_sorted":["astro-ph.EP","gr-qc"],"title_canon_sha256":"dfd8ae7ec91344e10760364a4f31e278538dc2bdf0cc04cee20cb04cabf78b30","abstract_canon_sha256":"b70d8e61527129c649732ba6ef3f046483da01c0de3b42ca50b4624890fd0647"},"schema_version":"1.0"},"canonical_sha256":"e5ddfb501ca5c2da5968dca7c8d7124e467638eebdf3b7609e5c1837eda32050","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:44:39.059671Z","signature_b64":"DzQBSE9f/TLAh19i/a8L9JbXw2eiLVMQuFeJ53z/4f+Xc6lyM9wtRFMIs2hFg4eJWNC0e0vcO9pJfE3f4yCVAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e5ddfb501ca5c2da5968dca7c8d7124e467638eebdf3b7609e5c1837eda32050","last_reissued_at":"2026-07-05T07:44:39.059193Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:44:39.059193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.11473","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":"2026-07-05T07:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eu0i/+rFlmEpIXYOrRuNxoRBZqEKeB7lceZDsytwAPVPnEl4DjFMrTcxyIo9SRB6aL6O67XuWornmfDjwAtaCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T22:29:15.971963Z"},"content_sha256":"33afbd4653e8f284d01d41f16c6ecc86846c115e22b3be324b0859ae6fcf984d","schema_version":"1.0","event_id":"sha256:33afbd4653e8f284d01d41f16c6ecc86846c115e22b3be324b0859ae6fcf984d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:4XO7WUA4UXBNUWLI3ST4RVYSJZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Mission to Nature's Telescope for High-Resolution Imaging of an Exoplanet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","gr-qc"],"primary_cat":"astro-ph.IM","authors_text":"Artur R. Davoyan, Darren Garber, Henry Helvajian, John McVey, Louis D. Friedman, Slava G. Turyshev, Thomas Heinshiemer","submitted_at":"2021-07-23T22:15:45Z","abstract_excerpt":"The solar gravitational lens (SGL) provides a factor of $10^{11}$ amplification for viewing distant point sources beyond our solar system. As such, it may be used for resolved imaging of extended sources, such as exoplanets, not possible otherwise. To use the SGL, a spacecraft carrying a modest telescope and a coronagraph must reach the SGLs focal region, that begins at $\\sim$550 astronomical units (AU) from the Sun and is oriented outward along the line connecting the distant object and the Sun. No spacecraft has ever reached even a half of that distance; and to do so within a reasonable miss"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.11473","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/2107.11473/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":"2026-07-05T07:44:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EDcG/YbUDWKjoBsh/rSMADYnGdjSb+gfDxm1DMguLMF8Y8UAEmwVyDLq5VlExggREdSsdxA3SpSO5WGjor1fCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T22:29:15.972923Z"},"content_sha256":"2c08bcf4c5ebadcc612494e141db03ec847560349cf62c7bf678597242f19e18","schema_version":"1.0","event_id":"sha256:2c08bcf4c5ebadcc612494e141db03ec847560349cf62c7bf678597242f19e18"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/bundle.json","state_url":"https://pith.science/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/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":"2026-08-03T22:29:15Z","links":{"resolver":"https://pith.science/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ","bundle":"https://pith.science/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/bundle.json","state":"https://pith.science/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4XO7WUA4UXBNUWLI3ST4RVYSJZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:4XO7WUA4UXBNUWLI3ST4RVYSJZ","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":"b70d8e61527129c649732ba6ef3f046483da01c0de3b42ca50b4624890fd0647","cross_cats_sorted":["astro-ph.EP","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-07-23T22:15:45Z","title_canon_sha256":"dfd8ae7ec91344e10760364a4f31e278538dc2bdf0cc04cee20cb04cabf78b30"},"schema_version":"1.0","source":{"id":"2107.11473","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.11473","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"arxiv_version","alias_value":"2107.11473v1","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.11473","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_12","alias_value":"4XO7WUA4UXBN","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_16","alias_value":"4XO7WUA4UXBNUWLI","created_at":"2026-07-05T07:44:39Z"},{"alias_kind":"pith_short_8","alias_value":"4XO7WUA4","created_at":"2026-07-05T07:44:39Z"}],"graph_snapshots":[{"event_id":"sha256:2c08bcf4c5ebadcc612494e141db03ec847560349cf62c7bf678597242f19e18","target":"graph","created_at":"2026-07-05T07:44:39Z","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/2107.11473/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The solar gravitational lens (SGL) provides a factor of $10^{11}$ amplification for viewing distant point sources beyond our solar system. As such, it may be used for resolved imaging of extended sources, such as exoplanets, not possible otherwise. To use the SGL, a spacecraft carrying a modest telescope and a coronagraph must reach the SGLs focal region, that begins at $\\sim$550 astronomical units (AU) from the Sun and is oriented outward along the line connecting the distant object and the Sun. No spacecraft has ever reached even a half of that distance; and to do so within a reasonable miss","authors_text":"Artur R. Davoyan, Darren Garber, Henry Helvajian, John McVey, Louis D. Friedman, Slava G. Turyshev, Thomas Heinshiemer","cross_cats":["astro-ph.EP","gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-07-23T22:15:45Z","title":"A Mission to Nature's Telescope for High-Resolution Imaging of an Exoplanet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.11473","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":"sha256:33afbd4653e8f284d01d41f16c6ecc86846c115e22b3be324b0859ae6fcf984d","target":"record","created_at":"2026-07-05T07:44:39Z","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":"b70d8e61527129c649732ba6ef3f046483da01c0de3b42ca50b4624890fd0647","cross_cats_sorted":["astro-ph.EP","gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2021-07-23T22:15:45Z","title_canon_sha256":"dfd8ae7ec91344e10760364a4f31e278538dc2bdf0cc04cee20cb04cabf78b30"},"schema_version":"1.0","source":{"id":"2107.11473","kind":"arxiv","version":1}},"canonical_sha256":"e5ddfb501ca5c2da5968dca7c8d7124e467638eebdf3b7609e5c1837eda32050","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e5ddfb501ca5c2da5968dca7c8d7124e467638eebdf3b7609e5c1837eda32050","first_computed_at":"2026-07-05T07:44:39.059193Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:44:39.059193Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DzQBSE9f/TLAh19i/a8L9JbXw2eiLVMQuFeJ53z/4f+Xc6lyM9wtRFMIs2hFg4eJWNC0e0vcO9pJfE3f4yCVAg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:44:39.059671Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.11473","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:33afbd4653e8f284d01d41f16c6ecc86846c115e22b3be324b0859ae6fcf984d","sha256:2c08bcf4c5ebadcc612494e141db03ec847560349cf62c7bf678597242f19e18"],"state_sha256":"1c333f2e6598b662566c04d04bbdcf22850120e90727a36a9eb8f35209f00c2c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LSOLHB1Z0Slz6jKxGXx5yReAIE3GE27uT+IRgcXkl608t0vV55lo24QTt0Jpdu/ISuj2zNjAPIq4Iw03qiqWBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T22:29:15.980059Z","bundle_sha256":"b99f13062e93b3068e70d108a42734fd17a86247750be18581f039055ae77344"}}