{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:T3NGFK2J3YTBSQCYU5GNWZSZCE","short_pith_number":"pith:T3NGFK2J","canonical_record":{"source":{"id":"1611.02700","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-08T19:18:26Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"cf979fe970568eafd9ed218ebff808a6d796ecdfed38ebfe7a80dc14d71818a1","abstract_canon_sha256":"fa75a7a3d1ddf93472acfd92ee0183e15c631dd7d9380d7d08fc6f517e0d4af4"},"schema_version":"1.0"},"canonical_sha256":"9eda62ab49de26194058a74cdb66591139ebe52de8e5fd561f5faeeebd55970e","source":{"kind":"arxiv","id":"1611.02700","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.02700","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"1611.02700v1","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.02700","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"T3NGFK2J3YTB","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"T3NGFK2J3YTBSQCY","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"T3NGFK2J","created_at":"2026-05-18T12:30:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:T3NGFK2J3YTBSQCYU5GNWZSZCE","target":"record","payload":{"canonical_record":{"source":{"id":"1611.02700","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-08T19:18:26Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"cf979fe970568eafd9ed218ebff808a6d796ecdfed38ebfe7a80dc14d71818a1","abstract_canon_sha256":"fa75a7a3d1ddf93472acfd92ee0183e15c631dd7d9380d7d08fc6f517e0d4af4"},"schema_version":"1.0"},"canonical_sha256":"9eda62ab49de26194058a74cdb66591139ebe52de8e5fd561f5faeeebd55970e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:46.612307Z","signature_b64":"hqti7L7hp0ayBtMB9AO1t7EiJKeT0REeGw/sE68D2GGpWUiofQE2mk68x0f6y7guVluf87Fl45gukhB0WJBlBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9eda62ab49de26194058a74cdb66591139ebe52de8e5fd561f5faeeebd55970e","last_reissued_at":"2026-05-18T00:50:46.611632Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:46.611632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1611.02700","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":"2026-05-18T00:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1+xeYeh4bfxQoGAE/2pXlPoFH3wPt3T649Egy51dn4ar1+KPGlLKeSgOLSOYYxYfgx57q+p6fZ82cnIou5c6DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:09:14.251895Z"},"content_sha256":"e9884ee0e9e83d441fe32c2e521c784c64841994cf0f0e53fcae20f508d68fdd","schema_version":"1.0","event_id":"sha256:e9884ee0e9e83d441fe32c2e521c784c64841994cf0f0e53fcae20f508d68fdd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:T3NGFK2J3YTBSQCYU5GNWZSZCE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"A. Bonafede, A. Deller, A. D. Kapi\\'nska, A. Drabent, A. Horneffer, A. O. Clarke, A. P. Mechev, A. Shulevski, A. Stroe, C. Ferrari, C. Horellou, C. Tasse, D. Cseh, D. Engels, D. J. B. Smith, D. J. McKay, D. J. Schwarz, D. N. Hoang, D. Rafferty, E. K. Mahony, E. Orr\\'u, E. Retana-Montenegro, E. Varenius, F. De Gasperin, F. P. Israel, G. Brunetti, G. Calistro Rivera, G. H. Heald, G. J. White, G. K. Miley, H. Falcke, H. Intema, H. J. A. R\\\"ottgering, I. M. van Bemmel, I. Prandoni, J. A. Zensus, J. B. R. Oonk, J. E. Conway, J. J. Harwood, J. P. McKean, J. Sabater, J. T. L. Zwart, K. T. Chy\\.zy, L. Morabito, M. A. Garrett, M. Brienza, M. Br\\\"uggen, M. Haverkorn, M. Hoeft, M. J. Hardcastle, M. J. Jarvis, M. Kunert-Bajraszewska, M. Sipior, M. Steinmetz, M. W. Wise, N. Jackson, N. R. Mohan, P. N. Best, P. P. van der Werf, R. Beck, R. Cassano, R. F. Pizzo, R. J. van Weeren, R. Morganti, S. Fr\\\"ohlich, S. Mandal, S. S. Sridhar, T.J. Dijkema, T. W. Shimwell, V. Heesen, W. L. Williams, W. van Driel","submitted_at":"2016-11-08T19:18:26Z","abstract_excerpt":"The LOFAR Two-metre Sky Survey (LoTSS) is a deep 120-168 MHz imaging survey that will eventually cover the entire Northern sky. Each of the 3170 pointings will be observed for 8 hrs, which, at most declinations, is sufficient to produce ~5arcsec resolution images with a sensitivity of ~0.1mJy/beam and accomplish the main scientific aims of the survey which are to explore the formation and evolution of massive black holes, galaxies, clusters of galaxies and large-scale structure. Due to the compact core and long baselines of LOFAR, the images provide excellent sensitivity to both highly extende"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.02700","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:50:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qdmBDRI9qM+uWe9o9PEcGlKsEvOd0KpYNXdwXYhAFaMi1fWBD/qY7l7UhRWQG4UZWllIHQbdxkto5ERsg8nUCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T23:09:14.252623Z"},"content_sha256":"89d5c0eada859ee199fce6fdb0c4d3b43763017e9e1270f4e2b99fd88df4789f","schema_version":"1.0","event_id":"sha256:89d5c0eada859ee199fce6fdb0c4d3b43763017e9e1270f4e2b99fd88df4789f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/bundle.json","state_url":"https://pith.science/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/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":"2026-05-28T23:09:14Z","links":{"resolver":"https://pith.science/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE","bundle":"https://pith.science/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/bundle.json","state":"https://pith.science/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T3NGFK2J3YTBSQCYU5GNWZSZCE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:T3NGFK2J3YTBSQCYU5GNWZSZCE","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":"fa75a7a3d1ddf93472acfd92ee0183e15c631dd7d9380d7d08fc6f517e0d4af4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-08T19:18:26Z","title_canon_sha256":"cf979fe970568eafd9ed218ebff808a6d796ecdfed38ebfe7a80dc14d71818a1"},"schema_version":"1.0","source":{"id":"1611.02700","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1611.02700","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"arxiv_version","alias_value":"1611.02700v1","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1611.02700","created_at":"2026-05-18T00:50:46Z"},{"alias_kind":"pith_short_12","alias_value":"T3NGFK2J3YTB","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_16","alias_value":"T3NGFK2J3YTBSQCY","created_at":"2026-05-18T12:30:44Z"},{"alias_kind":"pith_short_8","alias_value":"T3NGFK2J","created_at":"2026-05-18T12:30:44Z"}],"graph_snapshots":[{"event_id":"sha256:89d5c0eada859ee199fce6fdb0c4d3b43763017e9e1270f4e2b99fd88df4789f","target":"graph","created_at":"2026-05-18T00:50:46Z","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":"The LOFAR Two-metre Sky Survey (LoTSS) is a deep 120-168 MHz imaging survey that will eventually cover the entire Northern sky. Each of the 3170 pointings will be observed for 8 hrs, which, at most declinations, is sufficient to produce ~5arcsec resolution images with a sensitivity of ~0.1mJy/beam and accomplish the main scientific aims of the survey which are to explore the formation and evolution of massive black holes, galaxies, clusters of galaxies and large-scale structure. Due to the compact core and long baselines of LOFAR, the images provide excellent sensitivity to both highly extende","authors_text":"A. Bonafede, A. Deller, A. D. Kapi\\'nska, A. Drabent, A. Horneffer, A. O. Clarke, A. P. Mechev, A. Shulevski, A. Stroe, C. Ferrari, C. Horellou, C. Tasse, D. Cseh, D. Engels, D. J. B. Smith, D. J. McKay, D. J. Schwarz, D. N. Hoang, D. Rafferty, E. K. Mahony, E. Orr\\'u, E. Retana-Montenegro, E. Varenius, F. De Gasperin, F. P. Israel, G. Brunetti, G. Calistro Rivera, G. H. Heald, G. J. White, G. K. Miley, H. Falcke, H. Intema, H. J. A. R\\\"ottgering, I. M. van Bemmel, I. Prandoni, J. A. Zensus, J. B. R. Oonk, J. E. Conway, J. J. Harwood, J. P. McKean, J. Sabater, J. T. L. Zwart, K. T. Chy\\.zy, L. Morabito, M. A. Garrett, M. Brienza, M. Br\\\"uggen, M. Haverkorn, M. Hoeft, M. J. Hardcastle, M. J. Jarvis, M. Kunert-Bajraszewska, M. Sipior, M. Steinmetz, M. W. Wise, N. Jackson, N. R. Mohan, P. N. Best, P. P. van der Werf, R. Beck, R. Cassano, R. F. Pizzo, R. J. van Weeren, R. Morganti, S. Fr\\\"ohlich, S. Mandal, S. S. Sridhar, T.J. Dijkema, T. W. Shimwell, V. Heesen, W. L. Williams, W. van Driel","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-08T19:18:26Z","title":"The LOFAR Two-metre Sky Survey - I. Survey Description and Preliminary Data Release"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1611.02700","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:e9884ee0e9e83d441fe32c2e521c784c64841994cf0f0e53fcae20f508d68fdd","target":"record","created_at":"2026-05-18T00:50:46Z","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":"fa75a7a3d1ddf93472acfd92ee0183e15c631dd7d9380d7d08fc6f517e0d4af4","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-11-08T19:18:26Z","title_canon_sha256":"cf979fe970568eafd9ed218ebff808a6d796ecdfed38ebfe7a80dc14d71818a1"},"schema_version":"1.0","source":{"id":"1611.02700","kind":"arxiv","version":1}},"canonical_sha256":"9eda62ab49de26194058a74cdb66591139ebe52de8e5fd561f5faeeebd55970e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9eda62ab49de26194058a74cdb66591139ebe52de8e5fd561f5faeeebd55970e","first_computed_at":"2026-05-18T00:50:46.611632Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:50:46.611632Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hqti7L7hp0ayBtMB9AO1t7EiJKeT0REeGw/sE68D2GGpWUiofQE2mk68x0f6y7guVluf87Fl45gukhB0WJBlBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:50:46.612307Z","signed_message":"canonical_sha256_bytes"},"source_id":"1611.02700","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e9884ee0e9e83d441fe32c2e521c784c64841994cf0f0e53fcae20f508d68fdd","sha256:89d5c0eada859ee199fce6fdb0c4d3b43763017e9e1270f4e2b99fd88df4789f"],"state_sha256":"5f011e4b4f7833d39fae686a61def226d5159e5bb5624be43730c2e5c33c1cc7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Uxe09f8Rjoe+YPgLVJGh2FMDvJpJ+ic99ZzlBoiiLf3yN+c2wqOF0MYzwv7+iF8SAoBfchTScXtssI2ZVogRCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T23:09:14.256331Z","bundle_sha256":"479f134ce239c162bdadadcab2bb5d27d6be97548abbd097f7167ad06f8cbfd9"}}