{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:GOW2UKT3NH4V3CC6YIW7KUJI6L","short_pith_number":"pith:GOW2UKT3","schema_version":"1.0","canonical_sha256":"33adaa2a7b69f95d885ec22df55128f2e73f858fd4750e9247d148b77d726fe3","source":{"kind":"arxiv","id":"1811.07961","version":1},"attestation_state":"computed","paper":{"title":"Blazars in the LOFAR Two-Metre Sky Survey First Data Release","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Shulevski, C. Tasse, G. G\\\"urkan, H. J. A. R\\\"ottgering, I. Prandoni, J. Quinn, J. R. Callingham, J. Sabater, K. Duncan, L. K. Morabito, M. J. Hardcastle, P. N. Best, R. Morganti, S. Mooney, T. W. Shimwell, W. L. Williams","submitted_at":"2018-11-19T20:21:12Z","abstract_excerpt":"Historically, the blazar population has been poorly understood at low frequencies because survey sensitivity and angular resolution limitations have made it difficult to identify megahertz counterparts. We used the LOFAR Two-Metre Sky Survey (LoTSS) first data release value-added catalogue (LDR1) to study blazars in the low-frequency regime with unprecedented sensitivity and resolution. We identified radio counterparts to all $98$ known sources from the Third \\textit{Fermi}-LAT Point Source Catalogue (3FGL) or Roma-BZCAT Multi-frequency Catalogue of Blazars ($5^{\\mathrm{th}}$ edition) that fal"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.07961","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2018-11-19T20:21:12Z","cross_cats_sorted":[],"title_canon_sha256":"013e8e929bf82da0988b4f1419ea1583279809189343e6ae68dff10a43bb86eb","abstract_canon_sha256":"eecd20f7a3008874b15f177ea87bcbae759f0a80ea6906b8737388a28949fefc"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:24.280205Z","signature_b64":"qdTx1NSJ3sJHI0UtNRJDzz9rjrrG+wchBHBloLYUWSFmz32OKYkbGkB3tHAxltTVRiUutBxwPswMiV7C/gl4AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"33adaa2a7b69f95d885ec22df55128f2e73f858fd4750e9247d148b77d726fe3","last_reissued_at":"2026-05-17T23:53:24.279708Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:24.279708Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Blazars in the LOFAR Two-Metre Sky Survey First Data Release","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. Shulevski, C. Tasse, G. G\\\"urkan, H. J. A. R\\\"ottgering, I. Prandoni, J. Quinn, J. R. Callingham, J. Sabater, K. Duncan, L. K. Morabito, M. J. Hardcastle, P. N. Best, R. Morganti, S. Mooney, T. W. Shimwell, W. L. Williams","submitted_at":"2018-11-19T20:21:12Z","abstract_excerpt":"Historically, the blazar population has been poorly understood at low frequencies because survey sensitivity and angular resolution limitations have made it difficult to identify megahertz counterparts. We used the LOFAR Two-Metre Sky Survey (LoTSS) first data release value-added catalogue (LDR1) to study blazars in the low-frequency regime with unprecedented sensitivity and resolution. We identified radio counterparts to all $98$ known sources from the Third \\textit{Fermi}-LAT Point Source Catalogue (3FGL) or Roma-BZCAT Multi-frequency Catalogue of Blazars ($5^{\\mathrm{th}}$ edition) that fal"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.07961","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":""},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.07961","created_at":"2026-05-17T23:53:24.279777+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.07961v1","created_at":"2026-05-17T23:53:24.279777+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.07961","created_at":"2026-05-17T23:53:24.279777+00:00"},{"alias_kind":"pith_short_12","alias_value":"GOW2UKT3NH4V","created_at":"2026-05-18T12:32:25.280505+00:00"},{"alias_kind":"pith_short_16","alias_value":"GOW2UKT3NH4V3CC6","created_at":"2026-05-18T12:32:25.280505+00:00"},{"alias_kind":"pith_short_8","alias_value":"GOW2UKT3","created_at":"2026-05-18T12:32:25.280505+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L","json":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L.json","graph_json":"https://pith.science/api/pith-number/GOW2UKT3NH4V3CC6YIW7KUJI6L/graph.json","events_json":"https://pith.science/api/pith-number/GOW2UKT3NH4V3CC6YIW7KUJI6L/events.json","paper":"https://pith.science/paper/GOW2UKT3"},"agent_actions":{"view_html":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L","download_json":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L.json","view_paper":"https://pith.science/paper/GOW2UKT3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.07961&json=true","fetch_graph":"https://pith.science/api/pith-number/GOW2UKT3NH4V3CC6YIW7KUJI6L/graph.json","fetch_events":"https://pith.science/api/pith-number/GOW2UKT3NH4V3CC6YIW7KUJI6L/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L/action/storage_attestation","attest_author":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L/action/author_attestation","sign_citation":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L/action/citation_signature","submit_replication":"https://pith.science/pith/GOW2UKT3NH4V3CC6YIW7KUJI6L/action/replication_record"}},"created_at":"2026-05-17T23:53:24.279777+00:00","updated_at":"2026-05-17T23:53:24.279777+00:00"}