{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:FSDIGCBYCEGHFNC3JUV45DOPAS","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":"6adcadbb67efcfc37a65378ffad9165e2fe5ac215480ffac322422d4d6d60059","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-02T10:08:32Z","title_canon_sha256":"0c3578bd1c7dd8207ea684de2e8a6a6ecc2a55281648296e7616da166d49be6e"},"schema_version":"1.0","source":{"id":"2607.01975","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.01975","created_at":"2026-07-03T01:17:36Z"},{"alias_kind":"arxiv_version","alias_value":"2607.01975v1","created_at":"2026-07-03T01:17:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.01975","created_at":"2026-07-03T01:17:36Z"},{"alias_kind":"pith_short_12","alias_value":"FSDIGCBYCEGH","created_at":"2026-07-03T01:17:36Z"},{"alias_kind":"pith_short_16","alias_value":"FSDIGCBYCEGHFNC3","created_at":"2026-07-03T01:17:36Z"},{"alias_kind":"pith_short_8","alias_value":"FSDIGCBY","created_at":"2026-07-03T01:17:36Z"}],"graph_snapshots":[{"event_id":"sha256:71d162be014af79747d687d4c0132ba09cc9d754282662bd0fa27485fb7c77dc","target":"graph","created_at":"2026-07-03T01:17:36Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.01975/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We implemented a data acquisition system for 21 CentiMeter Array (21CMA), enabling baseband observations targeting pulsars and fast radio bursts. Based on the Radio Frequency System-on-Chip (RFSoC) platform, the new backend is capable of instantaneously covering the effective bandwidth from 50 to 350 MHz, with multi-board synchronization achieved at the timescale of the sampling clock. We observed PSR B0329+54 with a single station to verify the signal path integrity; then solved phase relations of multiple station pairs using bright persistent radio sources like Cas A and Cyg A; using these p","authors_text":"Cijie Zhang, Faxin Shen, Jian Li, Junhua Gu, Kejia Lee, Mengyao Xue, Qiuyang Fu, Renxin Xu, Weiwei Zhu, Youling Yue, Yukai Zhou","cross_cats":["astro-ph.HE"],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-02T10:08:32Z","title":"Pulsar Backend for 21 CentiMeter Array: Implementation of Data Acquisition and Initial Results"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.01975","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:eb8144d911e210dbf4e4b337f063b45ba4aac4329dc1301f43900665025d3fe2","target":"record","created_at":"2026-07-03T01:17:36Z","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":"6adcadbb67efcfc37a65378ffad9165e2fe5ac215480ffac322422d4d6d60059","cross_cats_sorted":["astro-ph.HE"],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2026-07-02T10:08:32Z","title_canon_sha256":"0c3578bd1c7dd8207ea684de2e8a6a6ecc2a55281648296e7616da166d49be6e"},"schema_version":"1.0","source":{"id":"2607.01975","kind":"arxiv","version":1}},"canonical_sha256":"2c86830838110c72b45b4d2bce8dcf04923395314352e8604ceebd8ef09a00bc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2c86830838110c72b45b4d2bce8dcf04923395314352e8604ceebd8ef09a00bc","first_computed_at":"2026-07-03T01:17:36.018365Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-03T01:17:36.018365Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d3QwsAq9vqQWf/2/RtSUIKcYjOxgDqMGmG390AWIlg+ajgR0zrKt0E0AgXsuygFae50Eb9fZIc6ycyXSVg5/DA==","signature_status":"signed_v1","signed_at":"2026-07-03T01:17:36.018887Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.01975","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb8144d911e210dbf4e4b337f063b45ba4aac4329dc1301f43900665025d3fe2","sha256:71d162be014af79747d687d4c0132ba09cc9d754282662bd0fa27485fb7c77dc"],"state_sha256":"7294eac864de26430823b125682e55b6a81731ca7e5f869eec0090b0e859c603"}