{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:SAEP46J5XHNHELUJU6P7X462QZ","short_pith_number":"pith:SAEP46J5","canonical_record":{"source":{"id":"2012.03561","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-07T10:01:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"02ce0f6ca356d40dfaeb248eb248dce8630c67a0a1f28436c6c530b89e2a6984","abstract_canon_sha256":"2bd1ed0543a37b2c45f7e066ecad6a141710c1a4ec6a3bec49781790ab73537a"},"schema_version":"1.0"},"canonical_sha256":"9008fe793db9da722e89a79ffbf3da8640df4651f6e07b3a2448418f20674c93","source":{"kind":"arxiv","id":"2012.03561","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.03561","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"arxiv_version","alias_value":"2012.03561v1","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.03561","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_12","alias_value":"SAEP46J5XHNH","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_16","alias_value":"SAEP46J5XHNHELUJ","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_8","alias_value":"SAEP46J5","created_at":"2026-07-05T02:53:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:SAEP46J5XHNHELUJU6P7X462QZ","target":"record","payload":{"canonical_record":{"source":{"id":"2012.03561","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-07T10:01:28Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"02ce0f6ca356d40dfaeb248eb248dce8630c67a0a1f28436c6c530b89e2a6984","abstract_canon_sha256":"2bd1ed0543a37b2c45f7e066ecad6a141710c1a4ec6a3bec49781790ab73537a"},"schema_version":"1.0"},"canonical_sha256":"9008fe793db9da722e89a79ffbf3da8640df4651f6e07b3a2448418f20674c93","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:53:30.191629Z","signature_b64":"c6VFqJMQAeVaXRJ7YoJguT4uyH28kEYQJ+dtNUS1po9pih+qDwTjT/7iPqskGu3VZqL5mrr3dCWjKQloYab7Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9008fe793db9da722e89a79ffbf3da8640df4651f6e07b3a2448418f20674c93","last_reissued_at":"2026-07-05T02:53:30.191153Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:53:30.191153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.03561","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":"2026-07-05T02:53:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bbZ7Tlz2kutmZV/dXUxNx3qYr6Z7rN8lH8SSFpa+7R4Qbf30V1wODA/cFiCICojd+awOx9F1Avc167eCACfvCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T11:09:37.139502Z"},"content_sha256":"29f62ef28b600e0c5de362273f080de8a56158ca6919fa0fee74e1ce2445a7ab","schema_version":"1.0","event_id":"sha256:29f62ef28b600e0c5de362273f080de8a56158ca6919fa0fee74e1ce2445a7ab"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:SAEP46J5XHNHELUJU6P7X462QZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Thousand-Pulsar-Array programme on MeerKAT II: observing strategy for pulsar monitoring with subarrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"A. Jameson, A. Karastergiou, A. Parthasarathy, B. V. Hugo, D. J. Reardon, E. D. Barr, M. Bailes, M. Geyer, M. J. Keith, M. Serylak, P. Weltevrede, R. M. Shannon, R. Spiewak, S. Buchner, S. Johnston, V. Venkatraman Krishnan, W. van Straten, X. Song","submitted_at":"2020-12-07T10:01:28Z","abstract_excerpt":"The Thousand Pulsar Array (TPA) project currently monitors about 500 pulsars with the sensitive MeerKAT radio telescope by using subarrays to observe multiple sources simultaneously. Here we define the adopted observing strategy, which guarantees that each target is observed long enough to obtain a high fidelity pulse profile, thereby reaching a sufficient precision of a simple pulse shape parameter. This precision is estimated from the contribution of the system noise of the telescope, and the pulse-to-pulse variability of each pulsar, which we quantify under some simplifying assumptions. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.03561","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/2012.03561/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":"2026-07-05T02:53:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hAsB0AVrqQJbMMBtZ52er3V1+nggXQmRs4xFG0RojlzAb4WABUm+hnbP//WGFqcZ1RBVtWttm4PWrqQO5NCVDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T11:09:37.139889Z"},"content_sha256":"c049b16ec80c79a2be375e74ea0eb48c89fab468c65124606a9739cf71746df0","schema_version":"1.0","event_id":"sha256:c049b16ec80c79a2be375e74ea0eb48c89fab468c65124606a9739cf71746df0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SAEP46J5XHNHELUJU6P7X462QZ/bundle.json","state_url":"https://pith.science/pith/SAEP46J5XHNHELUJU6P7X462QZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SAEP46J5XHNHELUJU6P7X462QZ/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":"2026-07-17T11:09:37Z","links":{"resolver":"https://pith.science/pith/SAEP46J5XHNHELUJU6P7X462QZ","bundle":"https://pith.science/pith/SAEP46J5XHNHELUJU6P7X462QZ/bundle.json","state":"https://pith.science/pith/SAEP46J5XHNHELUJU6P7X462QZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SAEP46J5XHNHELUJU6P7X462QZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:SAEP46J5XHNHELUJU6P7X462QZ","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":"2bd1ed0543a37b2c45f7e066ecad6a141710c1a4ec6a3bec49781790ab73537a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-07T10:01:28Z","title_canon_sha256":"02ce0f6ca356d40dfaeb248eb248dce8630c67a0a1f28436c6c530b89e2a6984"},"schema_version":"1.0","source":{"id":"2012.03561","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.03561","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"arxiv_version","alias_value":"2012.03561v1","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.03561","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_12","alias_value":"SAEP46J5XHNH","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_16","alias_value":"SAEP46J5XHNHELUJ","created_at":"2026-07-05T02:53:30Z"},{"alias_kind":"pith_short_8","alias_value":"SAEP46J5","created_at":"2026-07-05T02:53:30Z"}],"graph_snapshots":[{"event_id":"sha256:c049b16ec80c79a2be375e74ea0eb48c89fab468c65124606a9739cf71746df0","target":"graph","created_at":"2026-07-05T02:53:30Z","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/2012.03561/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Thousand Pulsar Array (TPA) project currently monitors about 500 pulsars with the sensitive MeerKAT radio telescope by using subarrays to observe multiple sources simultaneously. Here we define the adopted observing strategy, which guarantees that each target is observed long enough to obtain a high fidelity pulse profile, thereby reaching a sufficient precision of a simple pulse shape parameter. This precision is estimated from the contribution of the system noise of the telescope, and the pulse-to-pulse variability of each pulsar, which we quantify under some simplifying assumptions. We ","authors_text":"A. Jameson, A. Karastergiou, A. Parthasarathy, B. V. Hugo, D. J. Reardon, E. D. Barr, M. Bailes, M. Geyer, M. J. Keith, M. Serylak, P. Weltevrede, R. M. Shannon, R. Spiewak, S. Buchner, S. Johnston, V. Venkatraman Krishnan, W. van Straten, X. Song","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-07T10:01:28Z","title":"The Thousand-Pulsar-Array programme on MeerKAT II: observing strategy for pulsar monitoring with subarrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.03561","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":"sha256:29f62ef28b600e0c5de362273f080de8a56158ca6919fa0fee74e1ce2445a7ab","target":"record","created_at":"2026-07-05T02:53:30Z","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":"2bd1ed0543a37b2c45f7e066ecad6a141710c1a4ec6a3bec49781790ab73537a","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2020-12-07T10:01:28Z","title_canon_sha256":"02ce0f6ca356d40dfaeb248eb248dce8630c67a0a1f28436c6c530b89e2a6984"},"schema_version":"1.0","source":{"id":"2012.03561","kind":"arxiv","version":1}},"canonical_sha256":"9008fe793db9da722e89a79ffbf3da8640df4651f6e07b3a2448418f20674c93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9008fe793db9da722e89a79ffbf3da8640df4651f6e07b3a2448418f20674c93","first_computed_at":"2026-07-05T02:53:30.191153Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:53:30.191153Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"c6VFqJMQAeVaXRJ7YoJguT4uyH28kEYQJ+dtNUS1po9pih+qDwTjT/7iPqskGu3VZqL5mrr3dCWjKQloYab7Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:53:30.191629Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.03561","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29f62ef28b600e0c5de362273f080de8a56158ca6919fa0fee74e1ce2445a7ab","sha256:c049b16ec80c79a2be375e74ea0eb48c89fab468c65124606a9739cf71746df0"],"state_sha256":"c410056e8919677b19056d93c631d167f1ca13775376e0f00a34b40ce8e615e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WwPUu3IvbNGtPUkMtxxO/Z6am3QwguEQz3kjDwneZWKUHHwLr6SCi6unOM/ZjZrMkteYpEnaGkaCCnJn2LKpAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T11:09:37.142051Z","bundle_sha256":"86f6a859c4f221223fbed34b97206580f2a0029a76e5beefeaae184c01638226"}}