{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:GYCVXO5YKH25CHGSUSMOECVTOY","short_pith_number":"pith:GYCVXO5Y","canonical_record":{"source":{"id":"1908.05665","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T19:53:50Z","cross_cats_sorted":[],"title_canon_sha256":"daab127ae05b31b3d1310dd9b2341b378e34cc6eb621a1028147a83590f579a1","abstract_canon_sha256":"5e57e442d3c9ac65aacf783ce9277723bcfa25afe1b60859ff6c399479b83ee8"},"schema_version":"1.0"},"canonical_sha256":"36055bbbb851f5d11cd2a498e20ab3763951c828990d8623d66e25e1d29f8950","source":{"kind":"arxiv","id":"1908.05665","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.05665","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"arxiv_version","alias_value":"1908.05665v1","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.05665","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_12","alias_value":"GYCVXO5YKH25","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_16","alias_value":"GYCVXO5YKH25CHGS","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_8","alias_value":"GYCVXO5Y","created_at":"2026-07-04T23:57:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:GYCVXO5YKH25CHGSUSMOECVTOY","target":"record","payload":{"canonical_record":{"source":{"id":"1908.05665","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T19:53:50Z","cross_cats_sorted":[],"title_canon_sha256":"daab127ae05b31b3d1310dd9b2341b378e34cc6eb621a1028147a83590f579a1","abstract_canon_sha256":"5e57e442d3c9ac65aacf783ce9277723bcfa25afe1b60859ff6c399479b83ee8"},"schema_version":"1.0"},"canonical_sha256":"36055bbbb851f5d11cd2a498e20ab3763951c828990d8623d66e25e1d29f8950","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:57:52.304528Z","signature_b64":"W+zsMMu/2NoBQsNesLUjVjPRLVIGj7hcAXM8NW5OsffPBByNoZpp/k7xT2QJilC3Pq28L0lb/6hO5Vl02rfqDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36055bbbb851f5d11cd2a498e20ab3763951c828990d8623d66e25e1d29f8950","last_reissued_at":"2026-07-04T23:57:52.304118Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:57:52.304118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.05665","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":"2026-07-04T23:57:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"owFbDou1/jibjHn6S0eXXsO4GLtp4JrjCE5QgvdWiugI1AX1SzwJkac8flXjZoglQMo+wceDErleGV9PcmB9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T16:26:19.832936Z"},"content_sha256":"592e215694347740ea30eda40df6d6542e20aab5633ee22dae1027964d7d462d","schema_version":"1.0","event_id":"sha256:592e215694347740ea30eda40df6d6542e20aab5633ee22dae1027964d7d462d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:GYCVXO5YKH25CHGSUSMOECVTOY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stars at High Spatial Resolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.SR","authors_text":"Alexander Brown, Andrea K. Dupree, Antoine Labeyrie, Brian Wood, Carol A. Grady, Edward F. Guinan, Frederick M. Walter, Geraldine J. Peters, Gerard van Belle, Gioia Rau, Graham Harper, Jeffrey Linsky, Jeremy Drake, Katrien Kolenberg, Kenneth G. Carpenter, Margarita Karovska, Michelle Creech-Eakman, Nancy R. Evans, Rachael M. Roettenbacher, Stephen Ridgway, Steven H. Saar, Steven R. Cranmer","submitted_at":"2019-08-14T19:53:50Z","abstract_excerpt":"We summarize some of the compelling new scientific opportunities for understanding stars and stellar systems that can be enabled by sub-milliarcsec (sub-mas) angular resolution, UV-Optical spectral imaging observations, which can reveal the details of the many dynamic processes (e.g., evolving magnetic fields, accretion, convection, shocks, pulsations, winds, and jets) that affect stellar formation, structure, and evolution. These observations can only be provided by long-baseline interferometers or sparse aperture telescopes in space, since the aperture diameters required are in excess of 500"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.05665","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/1908.05665/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":"2026-07-04T23:57:52Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mqUMzMWbjof+z4Ls1k+twiQXITL/DrbPBzFYI+CX3/HJo5cay/jc6zPKNSp6+zzrFh87pCfnxK4VTI1Ezyi7Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T16:26:19.833330Z"},"content_sha256":"86d46ff875c821f5855fae1c0892b0ae1cd39de9522ceaedfd1d400f8079e149","schema_version":"1.0","event_id":"sha256:86d46ff875c821f5855fae1c0892b0ae1cd39de9522ceaedfd1d400f8079e149"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GYCVXO5YKH25CHGSUSMOECVTOY/bundle.json","state_url":"https://pith.science/pith/GYCVXO5YKH25CHGSUSMOECVTOY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GYCVXO5YKH25CHGSUSMOECVTOY/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":"2026-07-06T16:26:19Z","links":{"resolver":"https://pith.science/pith/GYCVXO5YKH25CHGSUSMOECVTOY","bundle":"https://pith.science/pith/GYCVXO5YKH25CHGSUSMOECVTOY/bundle.json","state":"https://pith.science/pith/GYCVXO5YKH25CHGSUSMOECVTOY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GYCVXO5YKH25CHGSUSMOECVTOY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:GYCVXO5YKH25CHGSUSMOECVTOY","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":"5e57e442d3c9ac65aacf783ce9277723bcfa25afe1b60859ff6c399479b83ee8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T19:53:50Z","title_canon_sha256":"daab127ae05b31b3d1310dd9b2341b378e34cc6eb621a1028147a83590f579a1"},"schema_version":"1.0","source":{"id":"1908.05665","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.05665","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"arxiv_version","alias_value":"1908.05665v1","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.05665","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_12","alias_value":"GYCVXO5YKH25","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_16","alias_value":"GYCVXO5YKH25CHGS","created_at":"2026-07-04T23:57:52Z"},{"alias_kind":"pith_short_8","alias_value":"GYCVXO5Y","created_at":"2026-07-04T23:57:52Z"}],"graph_snapshots":[{"event_id":"sha256:86d46ff875c821f5855fae1c0892b0ae1cd39de9522ceaedfd1d400f8079e149","target":"graph","created_at":"2026-07-04T23:57:52Z","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/1908.05665/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We summarize some of the compelling new scientific opportunities for understanding stars and stellar systems that can be enabled by sub-milliarcsec (sub-mas) angular resolution, UV-Optical spectral imaging observations, which can reveal the details of the many dynamic processes (e.g., evolving magnetic fields, accretion, convection, shocks, pulsations, winds, and jets) that affect stellar formation, structure, and evolution. These observations can only be provided by long-baseline interferometers or sparse aperture telescopes in space, since the aperture diameters required are in excess of 500","authors_text":"Alexander Brown, Andrea K. Dupree, Antoine Labeyrie, Brian Wood, Carol A. Grady, Edward F. Guinan, Frederick M. Walter, Geraldine J. Peters, Gerard van Belle, Gioia Rau, Graham Harper, Jeffrey Linsky, Jeremy Drake, Katrien Kolenberg, Kenneth G. Carpenter, Margarita Karovska, Michelle Creech-Eakman, Nancy R. Evans, Rachael M. Roettenbacher, Stephen Ridgway, Steven H. Saar, Steven R. Cranmer","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T19:53:50Z","title":"Stars at High Spatial Resolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.05665","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":"sha256:592e215694347740ea30eda40df6d6542e20aab5633ee22dae1027964d7d462d","target":"record","created_at":"2026-07-04T23:57:52Z","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":"5e57e442d3c9ac65aacf783ce9277723bcfa25afe1b60859ff6c399479b83ee8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2019-08-14T19:53:50Z","title_canon_sha256":"daab127ae05b31b3d1310dd9b2341b378e34cc6eb621a1028147a83590f579a1"},"schema_version":"1.0","source":{"id":"1908.05665","kind":"arxiv","version":1}},"canonical_sha256":"36055bbbb851f5d11cd2a498e20ab3763951c828990d8623d66e25e1d29f8950","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36055bbbb851f5d11cd2a498e20ab3763951c828990d8623d66e25e1d29f8950","first_computed_at":"2026-07-04T23:57:52.304118Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:57:52.304118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W+zsMMu/2NoBQsNesLUjVjPRLVIGj7hcAXM8NW5OsffPBByNoZpp/k7xT2QJilC3Pq28L0lb/6hO5Vl02rfqDg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:57:52.304528Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.05665","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:592e215694347740ea30eda40df6d6542e20aab5633ee22dae1027964d7d462d","sha256:86d46ff875c821f5855fae1c0892b0ae1cd39de9522ceaedfd1d400f8079e149"],"state_sha256":"94e286b61db1d38ef786ad9e6421022796cb9b0a52e65168473273f46792f4fc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UhO0/tx4jUfRb1eWqshhOJMZ+ieTTFYZBXMXMx2y+dFQz6YO0Yi3aimXtpVNHW4Diup6fbDgFUat1YVa6iPeBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T16:26:19.835370Z","bundle_sha256":"25bbd9ba1326896e639afa76feddd45468f12a0207f06f6eb61669a334cdec7a"}}