{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:MNX6GVPMSCTH4OQX2U7B7FAWJ2","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":"48a643d084a7630e9c89bd05a46ebbe731323d64d9ba3d8a389e79f91d813754","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-08T14:07:22Z","title_canon_sha256":"05c40f0ca67d968fc91074303e562a6bb176c0da09b3269699ee7bd95cac37dd"},"schema_version":"1.0","source":{"id":"1407.2093","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2093","created_at":"2026-05-18T02:43:34Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2093v1","created_at":"2026-05-18T02:43:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2093","created_at":"2026-05-18T02:43:34Z"},{"alias_kind":"pith_short_12","alias_value":"MNX6GVPMSCTH","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_16","alias_value":"MNX6GVPMSCTH4OQX","created_at":"2026-05-18T12:28:38Z"},{"alias_kind":"pith_short_8","alias_value":"MNX6GVPM","created_at":"2026-05-18T12:28:38Z"}],"graph_snapshots":[{"event_id":"sha256:90f341ed7e47d500139a3f4605d7bc33df66e3f4981afd0c97392c2b133658ba","target":"graph","created_at":"2026-05-18T02:43:34Z","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":"This study aims to characterise the polarized foreground emission in the ELAIS-N1 field and to address its possible implications for the extraction of the cosmological 21-cm signal from the Low-Frequency Array - Epoch of Reionization (LOFAR-EoR) data. We use the high band antennas of LOFAR to image this region and RM-synthesis to unravel structures of polarized emission at high Galactic latitudes. The brightness temperature of the detected Galactic emission is on average 4 K in polarized intensity and covers the range from -10 to +13rad m^-2 in Faraday depth. The total polarized intensity and ","authors_text":"A. Alexov, A. Bonafede, A. Deller, A. G. de Bruyn, A. Ghosh, A. G. Polatidis, A. Horneffer, A. H. Patil, A. Karastergiou, A. M. M. Scaife, A. Nelles, A. R. Offringa, A. Rowlinson, A. Stewart, A. van der Horst, A. W. Gunst, B. Ciardi, C. Ferrari, C. Tasse, C. Toribio, C. Vocks, D. Engels, D. McKay-Bukowski, D. Schwarz, E. Chapman, E. de Geus, E. Juette, E. R. Fernandez, F. B. Abdalla, F. Breitling, F. De Gasperin, G. Bernardi, G. Harker, G. Heald, G. Kuper, G. Mann, G. Mellema, G. Pietka, H. Falcke, H. Jensen, H. K. Vedantham, H. Munk, H. Paas, H. R. Butcher, H. Rottgering, I. M. Avruch, J. Anderson, J. Bregman, J. Broderick, J. E. Conway, J. Eisloffel, J. Griessmeier, J. Horandel, J. P. Hamaker, J. P. McKean, J. van Leeuwen, J. W. T. Hessels, K. M. B. Asad, L. V. E. Koopmans, M. A. Brentjens, M. A. Garrett, M. Bruggen, M. E. Bell, M. Haverkorn, M. Hoeft, M. Iacobelli, M. J. Bentum, M. J. Norden, M. Kramer, M. Kuniyoshi, M. Mevius, M. Pandey-Pommier, M. Serylak, M. Steinmetz, M. Tagger, O. Martinez-Rubi, O. Smirnov, O. Wucknitz, P. Best, P. Labropoulos, P. Maat, P. Zarka, R. A. Fallows, R. A. M. J. Wijers, R. Beck, R. Fender, R.-J. Dettmar, R. J. van Weeren, R. M. Thomas, R. Pizzo, R. Vermeulen, S. Bus, S. Daiboo, S. Duscha, S. J. Wijnholds, S. Kazemi, S. ter Veen, S. Thoudam, S. Yatawatta, S. Zaroubi, T. E. Hassall, V. I. Kondratiev, V. Jelic, V. N. Pandey, V. Veligatla, W. Frieswijk, W. N. Brouw, W. Reich, Y. Tang","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-08T14:07:22Z","title":"Initial LOFAR observations of Epoch of Reionization windows: II. Diffuse polarized emission in the ELAIS-N1 field"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2093","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:b7eb1bde71643293a5caf4a5163cf51462037851bc3badb0ef06082d7f8ba270","target":"record","created_at":"2026-05-18T02:43:34Z","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":"48a643d084a7630e9c89bd05a46ebbe731323d64d9ba3d8a389e79f91d813754","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2014-07-08T14:07:22Z","title_canon_sha256":"05c40f0ca67d968fc91074303e562a6bb176c0da09b3269699ee7bd95cac37dd"},"schema_version":"1.0","source":{"id":"1407.2093","kind":"arxiv","version":1}},"canonical_sha256":"636fe355ec90a67e3a17d53e1f94164e8aad53ff313af53b0e8465ed4dc91911","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"636fe355ec90a67e3a17d53e1f94164e8aad53ff313af53b0e8465ed4dc91911","first_computed_at":"2026-05-18T02:43:34.416726Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:43:34.416726Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3VpqWP26bLwhMLJpwCYtX7UnACAfMXALGGT1hGVzWDoI/LXXTekbdISIu/T9JaqQPhS5/n7n1W5NqRQaFRXZDw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:43:34.417519Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2093","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7eb1bde71643293a5caf4a5163cf51462037851bc3badb0ef06082d7f8ba270","sha256:90f341ed7e47d500139a3f4605d7bc33df66e3f4981afd0c97392c2b133658ba"],"state_sha256":"7a129d22fd0cd387a07ab6a1c9e9d69c01cdb5da15f80e4b91939915de8ffb60"}