{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7PFIT3574FAGKW3HTTAYJRMWDV","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":"88cf13f0338646977578cdd92db1f180276b5a9404ffa96ac5b5c32fa88e51be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-15T17:17:23Z","title_canon_sha256":"8ecddd062d6a59db29ceb63718b2581008f4061abcf47be76bf053e8b22a6dcb"},"schema_version":"1.0","source":{"id":"1305.3550","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.3550","created_at":"2026-05-18T01:49:56Z"},{"alias_kind":"arxiv_version","alias_value":"1305.3550v2","created_at":"2026-05-18T01:49:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.3550","created_at":"2026-05-18T01:49:56Z"},{"alias_kind":"pith_short_12","alias_value":"7PFIT3574FAG","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7PFIT3574FAGKW3H","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7PFIT357","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:316f009eb15cd8d9b039e262616eaf3426583adca1860bda1108b91b4f1cfc41","target":"graph","created_at":"2026-05-18T01:49:56Z","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":"LOFAR, the LOw-Frequency ARray, is a new-generation radio interferometer constructed in the north of the Netherlands and across europe. Utilizing a novel phased-array design, LOFAR covers the largely unexplored low-frequency range from 10-240 MHz and provides a number of unique observing capabilities. Spreading out from a core located near the village of Exloo in the northeast of the Netherlands, a total of 40 LOFAR stations are nearing completion. A further five stations have been deployed throughout Germany, and one station has been built in each of France, Sweden, and the UK. Digital beam-f","authors_text":"A. Alexov, A. Asgekar, A. Bonafede, A. Coolen, A. Corstanje, A. de Jong, A. Doorduin, A. G. de Bruyn, A. Horneffer, A. Huijgen, A.-J. Boonstra, A.-J. van der Veen, A. Karastergiou, A. Koers, A. Koster, A. Nelles, A. Noutsos, A. Omar, A. Polatidis, A. Renting, A. R. Offringa, A. Scaife, A. Schoenmakers, A. Shulevski, A. T. Deller, A. van Ardenne, A. van der Horst, A. van Duin, A. van Houwelingen, A. W. Gunst, A. Zensus, B. Ciardi, B. Scheers, B. van der Tol, B. W. Stappers, C. Ferrari, C. G. M. Sterks, C. Law, C. Sobey, C. Tasse, C. Vocks, C. Vogt, D. D. Mulcahy, D. Kant, D. McKay-Bukowski, D. Rafferty, E. de Geus, E. Juette, E. Kooistra, E. Middelberg, E. Mulder, E. Orr\\'u, E. Rol, E. van der Wal, F. Batejat, F. Breitling, F. De Gasperin, G. Bernardi, G. Heald, G. Kuper, G. Macario, G. Mann, G. Miley, G. Schoonderbeek, G. van Diepen, H. Falcke, H. Gankema, H. Holties, H. Intema, H.-J. Stiepel, H. Kollen, H. Meijering, H. Meulman, H. Munk, H. Olofsson, H. Paas, H. R. Butcher, H. R\\\"ottgering, H. Spreeuw, H. Weggemans, I. M. Avruch, I. Thomas, I. van Bemmel, J. Anderson, J. Bregman, J. Broderick, J. C. A. Miller-Jones, J. Conway, J. D. Mol, J. Dromer, J. Eisl\\\"offel, J. E. Noordam, J. H\\\"orandel, J. Lemaitre, J. Masters, J.-M. Grie{\\ss}meier, J. Morawietz, J.-P. de Reijer, J. P. Hamaker, J. P. McKean, J. P. W. Verbiest, J. Reitsma, J. Roosjen, J. Sluman, J. Swinbank, J. van Enst, J. van Leeuwen, J. van Zwieten, J. W. Romein, J. W. T. Hessels, K. Anderson, K. Dijkstra, K. Stuurwold, K. van der Schaaf, L. B\\\"ahren, L. B\\^irzan, L. Nieuwenhuis, L. V. E. Koopmans, M. A. Garrett, M. Arts, M. Brentjens, M. Br\\\"uggen, M. C. Toribio, M. de Vos, M. Drost, M. E. Bell, M. Gerbers, M. Hoeft, M. Iacobelli, M. J. Bentum, M. Kramer, M. Kuniyoshi, M. Loose, M. Mevius, M. Norden, M. Pandey-Pommier, M. P. van Haarlem, M. R. Bell, M. Ruiter, M. Serylak, M. Steinmetz, M. Tagger, M. van den Akker, M. van Veelen, M. W. Wise, N. Jackson, N. Vermaas, O. Davies, O. Smirnov, O. Usov, O. Wucknitz, P. Bennema, P. Best, P. C. Broekema, P. Donker, P. Gruppen, P. Lambropoulos, P. Maat, P. Riemers, P. Schellart, P. Weltevrede, P. Zarka, R. A. M. J. Wijers, R. Beck, R. Braun, R. Fallows, R. Fender, R. H. van de Brink, R.-J. Dettmar, R. Millenaar, R. Morganti, R. Nijboer, R. N. Mohan, R. Overeem, R. Pizzo, R. van Nieuwpoort, R. van Weeren, R. Vermeulen, S. Damstra, S. J. Wijnholds, S. Markoff, S. Rawlings, S. ter Veen, S. Thoudam, S. White, S. Yatawatta, S. Zaroubi, T. Coenen, T. Grit, T. Hassall, T. Wilhelmsson, V. I. Kondratiev, V. Jelic, V. N. Pandey, W. Frieswijk, W. N. Brouw, W. Reich, W. van Cappellen, Y. Koopman, Y. Tang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-15T17:17:23Z","title":"LOFAR: The LOw-Frequency ARray"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.3550","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:c3f5dc3842d6eab4b57e4117a73f06c893ef18272bc0ac2701c7398964fbf7c4","target":"record","created_at":"2026-05-18T01:49:56Z","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":"88cf13f0338646977578cdd92db1f180276b5a9404ffa96ac5b5c32fa88e51be","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-05-15T17:17:23Z","title_canon_sha256":"8ecddd062d6a59db29ceb63718b2581008f4061abcf47be76bf053e8b22a6dcb"},"schema_version":"1.0","source":{"id":"1305.3550","kind":"arxiv","version":2}},"canonical_sha256":"fbca89efbfe140655b679cc184c5961d7e1cc34ef30d5f88de0db1017d9d4596","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbca89efbfe140655b679cc184c5961d7e1cc34ef30d5f88de0db1017d9d4596","first_computed_at":"2026-05-18T01:49:56.858874Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:56.858874Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AKQuiovjYbnDPtkBx9MYUN98ppqs+EBYDVmZ0L9qWPdv2hTHlbNtAYZ6A8oq2bOeJNDksMbM9L7D7QJbz2cDCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:56.859361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.3550","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3f5dc3842d6eab4b57e4117a73f06c893ef18272bc0ac2701c7398964fbf7c4","sha256:316f009eb15cd8d9b039e262616eaf3426583adca1860bda1108b91b4f1cfc41"],"state_sha256":"9b0b129a6f2e9a9fe58c8b3c442078017ba9e8139af086929528e1bc55d11397"}