{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4NN2V6OMAHRWFFRKDFLMHNXDBN","short_pith_number":"pith:4NN2V6OM","canonical_record":{"source":{"id":"1802.03709","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-11T08:35:29Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74eb63a2800ed0199aae08316acbb61546f83ff5e6bb61beeee87f15b16397c4","abstract_canon_sha256":"01acab4a8e1d15f956166f71c149a1d0543337fd1dc0564070a8a3534b142de3"},"schema_version":"1.0"},"canonical_sha256":"e35baaf9cc01e362962a1956c3b6e30b5bf3897a1f390ef936a16949bf0ea31e","source":{"kind":"arxiv","id":"1802.03709","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03709","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03709v2","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03709","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"pith_short_12","alias_value":"4NN2V6OMAHRW","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4NN2V6OMAHRWFFRK","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4NN2V6OM","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4NN2V6OMAHRWFFRKDFLMHNXDBN","target":"record","payload":{"canonical_record":{"source":{"id":"1802.03709","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-11T08:35:29Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"74eb63a2800ed0199aae08316acbb61546f83ff5e6bb61beeee87f15b16397c4","abstract_canon_sha256":"01acab4a8e1d15f956166f71c149a1d0543337fd1dc0564070a8a3534b142de3"},"schema_version":"1.0"},"canonical_sha256":"e35baaf9cc01e362962a1956c3b6e30b5bf3897a1f390ef936a16949bf0ea31e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:36.414135Z","signature_b64":"Ozktwcj64/zEOgclHtbyNrLP2OfGemJuPsCf690ZvNMLdJFvFcQOJePvEmxIk0yfwfmhYvEP98a/hhbwe9/0Cg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e35baaf9cc01e362962a1956c3b6e30b5bf3897a1f390ef936a16949bf0ea31e","last_reissued_at":"2026-05-18T00:16:36.413588Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:36.413588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.03709","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:16:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Rf2ya0nh+t6SbLBP7Gcm8OYDYLHMy9KhdBqrJ7WwaDfw3uZDMvhJHjnT4Y5CM5ZFaIU/q4R8FjG3XTuF/snXCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:41:04.474868Z"},"content_sha256":"5568ed8eec09014a8dc78de1663c0ba88c340de9a3c24dd0c84fab15f16fd757","schema_version":"1.0","event_id":"sha256:5568ed8eec09014a8dc78de1663c0ba88c340de9a3c24dd0c84fab15f16fd757"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4NN2V6OMAHRWFFRKDFLMHNXDBN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Considerations for a Multi-beam Multi-purpose Survey with FAST","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Alex Dunning, Chenjin Jin, Di Li, Lei Qian, Marko Krco, Pei Wang, Peng Jiang, Rendong Nan, Yan Zhu, Youling Yue, Zhichen Pan","submitted_at":"2018-02-11T08:35:29Z","abstract_excerpt":"Having achieved 'first-light' right before the opening ceremony on September 25, 2016, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) is being busily commissioned. Its innovative design requires ~1000 points to be measured and driven instead of just the two axes of motion, e.g. Azimuth and Elevation for most of the conventional antennae, to realize pointing and tracking. We have devised a survey plan to utilized the full sensitivity of FAST, while minimizing the complexities in operation the system. The 19-beam L band focal plan array will be rotated to specific angles and ta"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03709","kind":"arxiv","version":2},"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":"2026-05-18T00:16:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HSfA9zMTak1/mWy9N3KE/SpryskC56JK9wyMWgCztMsH0M5Pp9II/uuOWR1UOYa9aFDbSh/LBqZeOiPonMLYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T19:41:04.475593Z"},"content_sha256":"8d76d20f92af662540239d20cc4efb40e84bf635ad3509c386d8baac313835b8","schema_version":"1.0","event_id":"sha256:8d76d20f92af662540239d20cc4efb40e84bf635ad3509c386d8baac313835b8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/bundle.json","state_url":"https://pith.science/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/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":"2026-05-25T19:41:04Z","links":{"resolver":"https://pith.science/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN","bundle":"https://pith.science/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/bundle.json","state":"https://pith.science/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4NN2V6OMAHRWFFRKDFLMHNXDBN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4NN2V6OMAHRWFFRKDFLMHNXDBN","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":"01acab4a8e1d15f956166f71c149a1d0543337fd1dc0564070a8a3534b142de3","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-11T08:35:29Z","title_canon_sha256":"74eb63a2800ed0199aae08316acbb61546f83ff5e6bb61beeee87f15b16397c4"},"schema_version":"1.0","source":{"id":"1802.03709","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.03709","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"arxiv_version","alias_value":"1802.03709v2","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.03709","created_at":"2026-05-18T00:16:36Z"},{"alias_kind":"pith_short_12","alias_value":"4NN2V6OMAHRW","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4NN2V6OMAHRWFFRK","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4NN2V6OM","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:8d76d20f92af662540239d20cc4efb40e84bf635ad3509c386d8baac313835b8","target":"graph","created_at":"2026-05-18T00:16:36Z","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":"Having achieved 'first-light' right before the opening ceremony on September 25, 2016, the Five-hundred-meter Aperture Spherical radio Telescope (FAST) is being busily commissioned. Its innovative design requires ~1000 points to be measured and driven instead of just the two axes of motion, e.g. Azimuth and Elevation for most of the conventional antennae, to realize pointing and tracking. We have devised a survey plan to utilized the full sensitivity of FAST, while minimizing the complexities in operation the system. The 19-beam L band focal plan array will be rotated to specific angles and ta","authors_text":"Alex Dunning, Chenjin Jin, Di Li, Lei Qian, Marko Krco, Pei Wang, Peng Jiang, Rendong Nan, Yan Zhu, Youling Yue, Zhichen Pan","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-11T08:35:29Z","title":"Considerations for a Multi-beam Multi-purpose Survey with FAST"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.03709","kind":"arxiv","version":2},"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":"sha256:5568ed8eec09014a8dc78de1663c0ba88c340de9a3c24dd0c84fab15f16fd757","target":"record","created_at":"2026-05-18T00:16:36Z","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":"01acab4a8e1d15f956166f71c149a1d0543337fd1dc0564070a8a3534b142de3","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-11T08:35:29Z","title_canon_sha256":"74eb63a2800ed0199aae08316acbb61546f83ff5e6bb61beeee87f15b16397c4"},"schema_version":"1.0","source":{"id":"1802.03709","kind":"arxiv","version":2}},"canonical_sha256":"e35baaf9cc01e362962a1956c3b6e30b5bf3897a1f390ef936a16949bf0ea31e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e35baaf9cc01e362962a1956c3b6e30b5bf3897a1f390ef936a16949bf0ea31e","first_computed_at":"2026-05-18T00:16:36.413588Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:36.413588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ozktwcj64/zEOgclHtbyNrLP2OfGemJuPsCf690ZvNMLdJFvFcQOJePvEmxIk0yfwfmhYvEP98a/hhbwe9/0Cg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:36.414135Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.03709","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5568ed8eec09014a8dc78de1663c0ba88c340de9a3c24dd0c84fab15f16fd757","sha256:8d76d20f92af662540239d20cc4efb40e84bf635ad3509c386d8baac313835b8"],"state_sha256":"176dba05e1e82bbe83f7a3a01abeee7e34798876257a47815614487995a35c29"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z+zDOu4jGzFmI6EA9/1emax7sUSX5/oFXlrojzOTSqZP2wO4Zxzmfc7tnlR+maGukmxhg3s0Whup98eBW7cGDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T19:41:04.479285Z","bundle_sha256":"08dd8882067368ccc8313f22e8f1c9121240a1032b47f1ac39e1a149543f5f05"}}