{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:ML67V5KRLBKDW5GNSVLFHSHIXC","short_pith_number":"pith:ML67V5KR","canonical_record":{"source":{"id":"1111.6398","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-11-28T10:40:39Z","cross_cats_sorted":[],"title_canon_sha256":"2921fa025262a8dcca9d3309172b29cd969f4e410d2fcd0a8a81e61c32584d78","abstract_canon_sha256":"b3612f95f4411817f86b485b95a6668802b64159d10182f89dd1c7b4075b3b61"},"schema_version":"1.0"},"canonical_sha256":"62fdfaf55158543b74cd955653c8e8b8866ffd7508ce4da25780f4859e9242cf","source":{"kind":"arxiv","id":"1111.6398","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.6398","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"arxiv_version","alias_value":"1111.6398v1","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.6398","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"pith_short_12","alias_value":"ML67V5KRLBKD","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"ML67V5KRLBKDW5GN","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"ML67V5KR","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:ML67V5KRLBKDW5GNSVLFHSHIXC","target":"record","payload":{"canonical_record":{"source":{"id":"1111.6398","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-11-28T10:40:39Z","cross_cats_sorted":[],"title_canon_sha256":"2921fa025262a8dcca9d3309172b29cd969f4e410d2fcd0a8a81e61c32584d78","abstract_canon_sha256":"b3612f95f4411817f86b485b95a6668802b64159d10182f89dd1c7b4075b3b61"},"schema_version":"1.0"},"canonical_sha256":"62fdfaf55158543b74cd955653c8e8b8866ffd7508ce4da25780f4859e9242cf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:59:23.075786Z","signature_b64":"1AvG/QS/Jic8JM2z21q0DprkeZuPsDJuF39ir4e48EvhVVt4NTa1qSfYB3JaAoAo9ProqD1cW4kiTPVOBhlbAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62fdfaf55158543b74cd955653c8e8b8866ffd7508ce4da25780f4859e9242cf","last_reissued_at":"2026-05-18T01:59:23.075169Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:59:23.075169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1111.6398","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":"2026-05-18T01:59:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZTFH+PQBpAWFZYEDkz1nyHWhOMMnqv1luUzPAWtcf4a0VZkMl/4ToXxqGBc6GJS2oMwU60jkRJbvXIgPd5H2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:04:16.785244Z"},"content_sha256":"256805fee1d05b156ae14fb0bb8c56e6500230380b27b786f567817ef0d40485","schema_version":"1.0","event_id":"sha256:256805fee1d05b156ae14fb0bb8c56e6500230380b27b786f567817ef0d40485"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:ML67V5KRLBKDW5GNSVLFHSHIXC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Very High Angular Resolution Science with the Square Kilometre Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"H. Bignall, J. C. A. Miller-Jones, L. E. H. Godfrey, L. Harvey-Smith, M. Johnston-Hollitt, M. Kramer, R. Ekers, S. Burke-Spolaor, S. Gulyaev, S. Tingay","submitted_at":"2011-11-28T10:40:39Z","abstract_excerpt":"Preliminary specifications for the Square Kilometre Array (SKA) call for 25% of the total collecting area of the dish array to be located at distances greater than 180 km from the core, with a maximum baseline of at least 3000 km. The array will provide angular resolution ~ 40 - 2 mas at 0.5 - 10 GHz with image sensitivity reaching < 50 nJy/beam in an 8 hour integration with 500 MHz bandwidth. Given these specifications, the high angular resolution component of the SKA will be capable of detecting brightness temperatures < 200 K with milliarcsecond-scale angular resolution. The aim of this art"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.6398","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":""},"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":"2026-05-18T01:59:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3Zy4Lgj/CHusU1nmEN93QInmL0neQUdlADAVB4jobgEyB94tZUk9plWu19YAdEFP0x5oLxM7Sy6c+vr5GV4RAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T18:04:16.785609Z"},"content_sha256":"163319ef0b89a41e1348a1879c95a42aa1811e7e9f2fc48e54eefd7bbaa9761b","schema_version":"1.0","event_id":"sha256:163319ef0b89a41e1348a1879c95a42aa1811e7e9f2fc48e54eefd7bbaa9761b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/bundle.json","state_url":"https://pith.science/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/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":"2026-06-04T18:04:16Z","links":{"resolver":"https://pith.science/pith/ML67V5KRLBKDW5GNSVLFHSHIXC","bundle":"https://pith.science/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/bundle.json","state":"https://pith.science/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ML67V5KRLBKDW5GNSVLFHSHIXC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:ML67V5KRLBKDW5GNSVLFHSHIXC","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":"b3612f95f4411817f86b485b95a6668802b64159d10182f89dd1c7b4075b3b61","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-11-28T10:40:39Z","title_canon_sha256":"2921fa025262a8dcca9d3309172b29cd969f4e410d2fcd0a8a81e61c32584d78"},"schema_version":"1.0","source":{"id":"1111.6398","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.6398","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"arxiv_version","alias_value":"1111.6398v1","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.6398","created_at":"2026-05-18T01:59:23Z"},{"alias_kind":"pith_short_12","alias_value":"ML67V5KRLBKD","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"ML67V5KRLBKDW5GN","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"ML67V5KR","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:163319ef0b89a41e1348a1879c95a42aa1811e7e9f2fc48e54eefd7bbaa9761b","target":"graph","created_at":"2026-05-18T01:59:23Z","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":"Preliminary specifications for the Square Kilometre Array (SKA) call for 25% of the total collecting area of the dish array to be located at distances greater than 180 km from the core, with a maximum baseline of at least 3000 km. The array will provide angular resolution ~ 40 - 2 mas at 0.5 - 10 GHz with image sensitivity reaching < 50 nJy/beam in an 8 hour integration with 500 MHz bandwidth. Given these specifications, the high angular resolution component of the SKA will be capable of detecting brightness temperatures < 200 K with milliarcsecond-scale angular resolution. The aim of this art","authors_text":"H. Bignall, J. C. A. Miller-Jones, L. E. H. Godfrey, L. Harvey-Smith, M. Johnston-Hollitt, M. Kramer, R. Ekers, S. Burke-Spolaor, S. Gulyaev, S. Tingay","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-11-28T10:40:39Z","title":"Very High Angular Resolution Science with the Square Kilometre Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.6398","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":"sha256:256805fee1d05b156ae14fb0bb8c56e6500230380b27b786f567817ef0d40485","target":"record","created_at":"2026-05-18T01:59:23Z","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":"b3612f95f4411817f86b485b95a6668802b64159d10182f89dd1c7b4075b3b61","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2011-11-28T10:40:39Z","title_canon_sha256":"2921fa025262a8dcca9d3309172b29cd969f4e410d2fcd0a8a81e61c32584d78"},"schema_version":"1.0","source":{"id":"1111.6398","kind":"arxiv","version":1}},"canonical_sha256":"62fdfaf55158543b74cd955653c8e8b8866ffd7508ce4da25780f4859e9242cf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62fdfaf55158543b74cd955653c8e8b8866ffd7508ce4da25780f4859e9242cf","first_computed_at":"2026-05-18T01:59:23.075169Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:59:23.075169Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1AvG/QS/Jic8JM2z21q0DprkeZuPsDJuF39ir4e48EvhVVt4NTa1qSfYB3JaAoAo9ProqD1cW4kiTPVOBhlbAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:59:23.075786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.6398","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:256805fee1d05b156ae14fb0bb8c56e6500230380b27b786f567817ef0d40485","sha256:163319ef0b89a41e1348a1879c95a42aa1811e7e9f2fc48e54eefd7bbaa9761b"],"state_sha256":"777c6258ea1bede66ad8ec3538e3f4556c317fe0a7f039d063a1ffd2ee676956"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uiSGgv+B14Ts/1c0TWkx/CRiChhqOViJcIVLSOkk89fenln484VwqXHJXEkXFGrm8xfzRVofufjn5qoiU/bUDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T18:04:16.787531Z","bundle_sha256":"f24ccbbe95fd0c83209ef9fbb2cbaffadfd0d7d18f88dcea45c577e45c0103d7"}}