{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:MYR2SJYQ7JMIAL7QL4Q3GHO75J","short_pith_number":"pith:MYR2SJYQ","canonical_record":{"source":{"id":"2408.03896","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-08-07T16:48:52Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"3255fc9bc5a1ddd038a806e6fabd56ddc1283ac8a0ba1474f5df269718538b66","abstract_canon_sha256":"582c44fbbab20477b7bb58cb32e5387b240dc4fea9f789d275d961cbf66e22fc"},"schema_version":"1.0"},"canonical_sha256":"6623a92710fa58802ff05f21b31ddfea6945f475497107aee0af8589085bdb8a","source":{"kind":"arxiv","id":"2408.03896","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.03896","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"arxiv_version","alias_value":"2408.03896v1","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.03896","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_12","alias_value":"MYR2SJYQ7JMI","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_16","alias_value":"MYR2SJYQ7JMIAL7Q","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_8","alias_value":"MYR2SJYQ","created_at":"2026-07-05T08:53:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:MYR2SJYQ7JMIAL7QL4Q3GHO75J","target":"record","payload":{"canonical_record":{"source":{"id":"2408.03896","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-08-07T16:48:52Z","cross_cats_sorted":["astro-ph.EP"],"title_canon_sha256":"3255fc9bc5a1ddd038a806e6fabd56ddc1283ac8a0ba1474f5df269718538b66","abstract_canon_sha256":"582c44fbbab20477b7bb58cb32e5387b240dc4fea9f789d275d961cbf66e22fc"},"schema_version":"1.0"},"canonical_sha256":"6623a92710fa58802ff05f21b31ddfea6945f475497107aee0af8589085bdb8a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:53:12.498895Z","signature_b64":"Kp8ECRCXEX5Gcx5SgcyxGWF5PrQ2XX/gYEyQjDL/SKcMkjIdkJOZ7ph+BRtSyzj4fQ+cnypyslYYuCaPoBcbAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6623a92710fa58802ff05f21b31ddfea6945f475497107aee0af8589085bdb8a","last_reissued_at":"2026-07-05T08:53:12.498516Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:53:12.498516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2408.03896","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":"2026-07-05T08:53:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gUuHPUUuA3A2qaIlD5t/lDhs/M7r/FqOQozQIK3a/G3QijifbZNo0BUCXowCSzfGIJJX/gZZN8fPkovgfonKAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:53:38.230194Z"},"content_sha256":"694f66c620a0caeb0e120c3195348f0c6587021c3e16236185ff4f72dc21a244","schema_version":"1.0","event_id":"sha256:694f66c620a0caeb0e120c3195348f0c6587021c3e16236185ff4f72dc21a244"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:MYR2SJYQ7JMIAL7QL4Q3GHO75J","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Planet Formation Imager (PFI): Project update and future directions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.IM","authors_text":"John D. Monnier (U. Michigan), Michael J. Ireland (Australia National University), Stefan Kraus (U. Exeter)","submitted_at":"2024-08-07T16:48:52Z","abstract_excerpt":"The Planet Formation Imager (PFI) Project is dedicated to defining a next-generation facility that can answer fundamental questions about how planets form, including detection of young giant exoplanets and their circumplanetary disks. The proposed expansive design for a 12-element array of 8m class telescopes with >1.2 km baselines would indeed revolutionize our understanding of planet formation and is technically achievable, albeit at a high cost. It has been 10 years since this conceptual design process began and we give an overview of the status of the PFI project. We also review how a scal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.03896","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/2408.03896/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":"2026-07-05T08:53:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4yWYiQ2NsprImZwU0uiDBFm0XgSaaDjJ0FZ5mp3UNAGrC+kp5letd+teeDd8/XXd1g+DswNtyvCOjoOmm2z+Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T15:53:38.230676Z"},"content_sha256":"331f1ea2fc6fb50e296359075b1452c1060e67e339b4a86f8d546bbae96cfa7b","schema_version":"1.0","event_id":"sha256:331f1ea2fc6fb50e296359075b1452c1060e67e339b4a86f8d546bbae96cfa7b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/bundle.json","state_url":"https://pith.science/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/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":"2026-08-03T15:53:38Z","links":{"resolver":"https://pith.science/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J","bundle":"https://pith.science/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/bundle.json","state":"https://pith.science/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MYR2SJYQ7JMIAL7QL4Q3GHO75J/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:MYR2SJYQ7JMIAL7QL4Q3GHO75J","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":"582c44fbbab20477b7bb58cb32e5387b240dc4fea9f789d275d961cbf66e22fc","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-08-07T16:48:52Z","title_canon_sha256":"3255fc9bc5a1ddd038a806e6fabd56ddc1283ac8a0ba1474f5df269718538b66"},"schema_version":"1.0","source":{"id":"2408.03896","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2408.03896","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"arxiv_version","alias_value":"2408.03896v1","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2408.03896","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_12","alias_value":"MYR2SJYQ7JMI","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_16","alias_value":"MYR2SJYQ7JMIAL7Q","created_at":"2026-07-05T08:53:12Z"},{"alias_kind":"pith_short_8","alias_value":"MYR2SJYQ","created_at":"2026-07-05T08:53:12Z"}],"graph_snapshots":[{"event_id":"sha256:331f1ea2fc6fb50e296359075b1452c1060e67e339b4a86f8d546bbae96cfa7b","target":"graph","created_at":"2026-07-05T08:53:12Z","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/2408.03896/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Planet Formation Imager (PFI) Project is dedicated to defining a next-generation facility that can answer fundamental questions about how planets form, including detection of young giant exoplanets and their circumplanetary disks. The proposed expansive design for a 12-element array of 8m class telescopes with >1.2 km baselines would indeed revolutionize our understanding of planet formation and is technically achievable, albeit at a high cost. It has been 10 years since this conceptual design process began and we give an overview of the status of the PFI project. We also review how a scal","authors_text":"John D. Monnier (U. Michigan), Michael J. Ireland (Australia National University), Stefan Kraus (U. Exeter)","cross_cats":["astro-ph.EP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-08-07T16:48:52Z","title":"Planet Formation Imager (PFI): Project update and future directions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.03896","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":"sha256:694f66c620a0caeb0e120c3195348f0c6587021c3e16236185ff4f72dc21a244","target":"record","created_at":"2026-07-05T08:53:12Z","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":"582c44fbbab20477b7bb58cb32e5387b240dc4fea9f789d275d961cbf66e22fc","cross_cats_sorted":["astro-ph.EP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2024-08-07T16:48:52Z","title_canon_sha256":"3255fc9bc5a1ddd038a806e6fabd56ddc1283ac8a0ba1474f5df269718538b66"},"schema_version":"1.0","source":{"id":"2408.03896","kind":"arxiv","version":1}},"canonical_sha256":"6623a92710fa58802ff05f21b31ddfea6945f475497107aee0af8589085bdb8a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6623a92710fa58802ff05f21b31ddfea6945f475497107aee0af8589085bdb8a","first_computed_at":"2026-07-05T08:53:12.498516Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:53:12.498516Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Kp8ECRCXEX5Gcx5SgcyxGWF5PrQ2XX/gYEyQjDL/SKcMkjIdkJOZ7ph+BRtSyzj4fQ+cnypyslYYuCaPoBcbAA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:53:12.498895Z","signed_message":"canonical_sha256_bytes"},"source_id":"2408.03896","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:694f66c620a0caeb0e120c3195348f0c6587021c3e16236185ff4f72dc21a244","sha256:331f1ea2fc6fb50e296359075b1452c1060e67e339b4a86f8d546bbae96cfa7b"],"state_sha256":"38176be8d1fec874646cbfb95c8c60109aec99017d19504acbdf689cd31517da"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3mveT8lSn5zodtVICfEpMCyqoFNuWKheD0k9EA6Uq5ujoe+bWlEK1/7K82xICcCXR2CnLrm6J7nnm3g6+JjEDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T15:53:38.234062Z","bundle_sha256":"a97b81170c3239e13034a5862a26f3aa5bcd699487d8f2576979bbda80a6e7b4"}}