{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:YEEXCXUO4VU5NBPSMYSWTOT2JK","short_pith_number":"pith:YEEXCXUO","canonical_record":{"source":{"id":"2607.15039","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-16T14:19:52Z","cross_cats_sorted":[],"title_canon_sha256":"33c1677effb0f057ff9936b41b74657e7d7d858d31e62ddfae5f5197d778abfa","abstract_canon_sha256":"b200f7d4492c1b8d97cdf90c092d8500cee7a6fcfbb60f7601fbfc5ded01b4c1"},"schema_version":"1.0"},"canonical_sha256":"c109715e8ee569d685f2662569ba7a4a80430a2fa16110a84566edda2fe6005f","source":{"kind":"arxiv","id":"2607.15039","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15039","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15039v1","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15039","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_12","alias_value":"YEEXCXUO4VU5","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_16","alias_value":"YEEXCXUO4VU5NBPS","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_8","alias_value":"YEEXCXUO","created_at":"2026-07-17T01:22:06Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:YEEXCXUO4VU5NBPSMYSWTOT2JK","target":"record","payload":{"canonical_record":{"source":{"id":"2607.15039","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-16T14:19:52Z","cross_cats_sorted":[],"title_canon_sha256":"33c1677effb0f057ff9936b41b74657e7d7d858d31e62ddfae5f5197d778abfa","abstract_canon_sha256":"b200f7d4492c1b8d97cdf90c092d8500cee7a6fcfbb60f7601fbfc5ded01b4c1"},"schema_version":"1.0"},"canonical_sha256":"c109715e8ee569d685f2662569ba7a4a80430a2fa16110a84566edda2fe6005f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-17T01:22:06.247489Z","signature_b64":"Duc90bp/jClMq1kKZd38Ex1tXo7HAvqmSTzjuvx4G/l/a+CxH52YLtMcDVQtXoHf0jZ0OqvfQNTLqwYP3xCgAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c109715e8ee569d685f2662569ba7a4a80430a2fa16110a84566edda2fe6005f","last_reissued_at":"2026-07-17T01:22:06.246634Z","signature_status":"signed_v1","first_computed_at":"2026-07-17T01:22:06.246634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.15039","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":"2026-07-17T01:22:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UlmdGTH1cKyGeJ+fW5gogd2SPDI6cx2Zw7TE07LjSU+a0uzGpfF0srrG1Tv10V/dgvMf8uMcrdPFojEmesukAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:49:17.572350Z"},"content_sha256":"4e669e7415a23878303baa718bdb75730462285a39afa097511f1b6804df354d","schema_version":"1.0","event_id":"sha256:4e669e7415a23878303baa718bdb75730462285a39afa097511f1b6804df354d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:YEEXCXUO4VU5NBPSMYSWTOT2JK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low-Frequency VLBI Network Using SKA-LOW","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Bhal Chandra Joshi, Fuminori Tsuchiya, Hideyuki Kobayashi, Hiroaki Misawa, Kazuhiro Takefuji, Kazuma Fujita, Keitaro Takahashi, Kenta Fujisawa, Kohtaro Niinuma, Linjie Chen, M. A. Krishnakumar, Shintaro Yoshiura, Syunsaku Suzuki, Tomoaki Oyama, Vishwesh Marthi, Wei Wang, Wu Jiang, Yashwant Gupta, Yihua Yan, Zhiqiang Shen","submitted_at":"2026-07-16T14:19:52Z","abstract_excerpt":"We propose the development of a low-frequency Very Long Baseline Interferometry (VLBI) network operating in the 100-350 MHz range, incorporating the Square Kilometre Array Low (SKA-LOW). SKA-LOW is expected to achieve exceptionally high sensitivity within this frequency band. By integrating SKA-LOW with other high-sensitivity radio telescopes located across the Asia-Pacific region, the proposed network is anticipated to deliver up to two orders of magnitude improvement in sensitivity compared to the existing VLBA. While several scientific themes utilizing low-frequency VLBI have already been p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15039","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/2607.15039/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":"2026-07-17T01:22:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UQnEhCBE45qm7wtHmKdCpB/Nftzr/YK+z7O9An+F7DMpogR9XV6P/PAE9wqMrN3bCczsN+rN2vk7joOYu53KAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:49:17.573297Z"},"content_sha256":"3457b8843d47bb9c15a5c3bf57d771b39810083312e18ff47d3b4da829dc174c","schema_version":"1.0","event_id":"sha256:3457b8843d47bb9c15a5c3bf57d771b39810083312e18ff47d3b4da829dc174c"},{"event_type":"integrity_finding","subject_pith_number":"pith:2026:YEEXCXUO4VU5NBPSMYSWTOT2JK","target":"integrity","payload":{"note":"Identifier '10.1088/1674-4527/acddbc' is syntactically valid but the DOI registry (doi.org) returned 404, and Crossref / OpenAlex / internal corpus also have no record. The cited work could not be located through any authoritative source.","snippet":"Chinese Pulsar Timing Array Collaboration , title =. Research in Astronomy and Astrophysics , year =. doi:10.1088/1674-4527/acddbc , url =","arxiv_id":"2607.15039","detector":"doi_compliance","evidence":{"doi":"10.1088/1674-4527/acddbc","arxiv_id":null,"ref_index":11,"raw_excerpt":"Chinese Pulsar Timing Array Collaboration , title =. Research in Astronomy and Astrophysics , year =. doi:10.1088/1674-4527/acddbc , url =","parse_status":"well_formed","verdict_class":"cross_source","checked_sources":["crossref_by_doi","openalex_by_doi","doi_org_head"],"resolution_status":"hard_miss"},"severity":"critical","ref_index":11,"audited_at":"2026-08-02T00:30:04.285642Z","event_type":"pith.integrity.v1","detected_doi":"10.1088/1674-4527/acddbc","detector_url":"https://pith.science/pith-integrity-protocol#doi_compliance","external_url":null,"finding_type":"unresolvable_identifier","evidence_hash":"53b2700215546095eb34b0f062719cd4c73d397af0a1ae2da0bf948b0b15bf73","paper_version":1,"verdict_class":"cross_source","resolved_title":null,"detector_version":"1.1.0","detected_arxiv_id":null,"integrity_event_id":16916,"payload_sha256":"162e8b5d40a8875b36ad5f8d9cb3d424df114e13e44a8478c1758527e374b3b3","signature_b64":"3pwrDNrscIm/KAVbdGra0TTQ5dCa8Uge1z5ofHjpW9M2mNTSe9bG4ofVElcnsmaJ/E65UyA9jbOvB9GI4UWzDw==","signing_key_id":"pith-v1-2026-05"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-08-02T00:33:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0y7A0OY3nPZ2sx55p2fdbZ1p47bPu+KUPu0HoVpTxUVP3DX+HDiJZsH/ojSB2grN95rGgFGtQel8ySooVE+QCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:49:17.578105Z"},"content_sha256":"4fdf5126579d7372c34ee9234ae3f4de4f67d223c336df445b2eaaf358f56316","schema_version":"1.0","event_id":"sha256:4fdf5126579d7372c34ee9234ae3f4de4f67d223c336df445b2eaaf358f56316"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/bundle.json","state_url":"https://pith.science/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/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":"2026-08-03T19:49:17Z","links":{"resolver":"https://pith.science/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK","bundle":"https://pith.science/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/bundle.json","state":"https://pith.science/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YEEXCXUO4VU5NBPSMYSWTOT2JK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:YEEXCXUO4VU5NBPSMYSWTOT2JK","merge_version":"pith-open-graph-merge-v1","event_count":3,"valid_event_count":3,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b200f7d4492c1b8d97cdf90c092d8500cee7a6fcfbb60f7601fbfc5ded01b4c1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-16T14:19:52Z","title_canon_sha256":"33c1677effb0f057ff9936b41b74657e7d7d858d31e62ddfae5f5197d778abfa"},"schema_version":"1.0","source":{"id":"2607.15039","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.15039","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"arxiv_version","alias_value":"2607.15039v1","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.15039","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_12","alias_value":"YEEXCXUO4VU5","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_16","alias_value":"YEEXCXUO4VU5NBPS","created_at":"2026-07-17T01:22:06Z"},{"alias_kind":"pith_short_8","alias_value":"YEEXCXUO","created_at":"2026-07-17T01:22:06Z"}],"graph_snapshots":[{"event_id":"sha256:3457b8843d47bb9c15a5c3bf57d771b39810083312e18ff47d3b4da829dc174c","target":"graph","created_at":"2026-07-17T01:22:06Z","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/2607.15039/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We propose the development of a low-frequency Very Long Baseline Interferometry (VLBI) network operating in the 100-350 MHz range, incorporating the Square Kilometre Array Low (SKA-LOW). SKA-LOW is expected to achieve exceptionally high sensitivity within this frequency band. By integrating SKA-LOW with other high-sensitivity radio telescopes located across the Asia-Pacific region, the proposed network is anticipated to deliver up to two orders of magnitude improvement in sensitivity compared to the existing VLBA. While several scientific themes utilizing low-frequency VLBI have already been p","authors_text":"Bhal Chandra Joshi, Fuminori Tsuchiya, Hideyuki Kobayashi, Hiroaki Misawa, Kazuhiro Takefuji, Kazuma Fujita, Keitaro Takahashi, Kenta Fujisawa, Kohtaro Niinuma, Linjie Chen, M. A. Krishnakumar, Shintaro Yoshiura, Syunsaku Suzuki, Tomoaki Oyama, Vishwesh Marthi, Wei Wang, Wu Jiang, Yashwant Gupta, Yihua Yan, Zhiqiang Shen","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-16T14:19:52Z","title":"Low-Frequency VLBI Network Using SKA-LOW"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.15039","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":"sha256:4e669e7415a23878303baa718bdb75730462285a39afa097511f1b6804df354d","target":"record","created_at":"2026-07-17T01:22:06Z","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":"b200f7d4492c1b8d97cdf90c092d8500cee7a6fcfbb60f7601fbfc5ded01b4c1","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-16T14:19:52Z","title_canon_sha256":"33c1677effb0f057ff9936b41b74657e7d7d858d31e62ddfae5f5197d778abfa"},"schema_version":"1.0","source":{"id":"2607.15039","kind":"arxiv","version":1}},"canonical_sha256":"c109715e8ee569d685f2662569ba7a4a80430a2fa16110a84566edda2fe6005f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c109715e8ee569d685f2662569ba7a4a80430a2fa16110a84566edda2fe6005f","first_computed_at":"2026-07-17T01:22:06.246634Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-17T01:22:06.246634Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Duc90bp/jClMq1kKZd38Ex1tXo7HAvqmSTzjuvx4G/l/a+CxH52YLtMcDVQtXoHf0jZ0OqvfQNTLqwYP3xCgAw==","signature_status":"signed_v1","signed_at":"2026-07-17T01:22:06.247489Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.15039","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4e669e7415a23878303baa718bdb75730462285a39afa097511f1b6804df354d","sha256:3457b8843d47bb9c15a5c3bf57d771b39810083312e18ff47d3b4da829dc174c","sha256:4fdf5126579d7372c34ee9234ae3f4de4f67d223c336df445b2eaaf358f56316"],"state_sha256":"dc9dae642e8da0d314edef42c7f3639f2e316e3d497b9c09c1653631c22663bd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7wd6YcY1TZnZP6pHm+bOZOw1lFwzwcmx4fz7USAs8Bs8RsrNHonJqgGikjoU1RWFx8zS14FHBaXDIFjpR5FQDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T19:49:17.583276Z","bundle_sha256":"2741b77ef3a75ac099539e87f4ca6a4c3f44dd5564d022564d960ab24f37ffb7"}}