{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:MLNSNNE356K544RJDVO764OJM3","short_pith_number":"pith:MLNSNNE3","canonical_record":{"source":{"id":"1509.03931","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-14T02:43:46Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"da760e4e336353c31b0b49ad8b34e247a1d35122768c48ebb9097d8c00a03134","abstract_canon_sha256":"ced1425f89bbefbd040b7b188d25a2d74e25a7b4e0bbde337eed2a6f810f9398"},"schema_version":"1.0"},"canonical_sha256":"62db26b49bef95de72291d5dff71c966ce90bc0ba5aa57491e64f35c0d07bb17","source":{"kind":"arxiv","id":"1509.03931","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03931","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03931v1","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03931","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"MLNSNNE356K5","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MLNSNNE356K544RJ","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MLNSNNE3","created_at":"2026-05-18T12:29:32Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:MLNSNNE356K544RJDVO764OJM3","target":"record","payload":{"canonical_record":{"source":{"id":"1509.03931","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-14T02:43:46Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"da760e4e336353c31b0b49ad8b34e247a1d35122768c48ebb9097d8c00a03134","abstract_canon_sha256":"ced1425f89bbefbd040b7b188d25a2d74e25a7b4e0bbde337eed2a6f810f9398"},"schema_version":"1.0"},"canonical_sha256":"62db26b49bef95de72291d5dff71c966ce90bc0ba5aa57491e64f35c0d07bb17","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:26:41.609584Z","signature_b64":"xJGqAYpsnLph6y7HPWjM3w+re2+N367AnoHskUyHoebX6HHvaUbb8nA/1tBBhi+HZwLFbWPqtgpqA1Gez+LECw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"62db26b49bef95de72291d5dff71c966ce90bc0ba5aa57491e64f35c0d07bb17","last_reissued_at":"2026-05-18T01:26:41.608985Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:26:41.608985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1509.03931","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":"2026-05-18T01:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O3iFx8LOE0h5YW1mZlk/r61MspTKDwOGKiK15aGUfjtSPviWRyZ8Tuvj0OIcQQzjmg/Z6kYabvBxLqil41hdAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:48:37.571806Z"},"content_sha256":"314b6cec8eab2895a50ce391b0434074fc4d2dd0832b980bc2813de37ae09542","schema_version":"1.0","event_id":"sha256:314b6cec8eab2895a50ce391b0434074fc4d2dd0832b980bc2813de37ae09542"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:MLNSNNE356K544RJDVO764OJM3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The ASKAP/EMU Source Finding Data Challenge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"(10) National Radio Astronomical Observatory, 11), (11) Jansky Fellow NRAO, 12, (12) School of Physics The University of Sydney, 13), (13) ARC Centre of Excellence for All-Sky Astrophysics, (14) ASTRON the Netherlands Institute for Radio Astronomy, 15), (15) University of Groningen Kapteyn Astronomical Institute, (16) International Centre for Radio Astronomy Research UWA, (17) European Space Agency ESAC Planck Science Office, 18), (18) INAF Istituto di Radioastronomia Bologna, (19) National Centre for Radio Astrophysics Tata Institute of Fundamental Research, (20) IAPS INAF via del Fosso del Cavaliere 100 Rome, (21) Department of Physics, (22) Hamburger Sternwarte Universitat Hamburg, (23) Leiden Observatory Leiden University, (24) Minnesota Institute for Astrophysics University of Minnesota, (25) Department of Astrophysical Sciences Princeton University, (26) Department of Astronomy University of Cape Town, 27), (27) Department of Physics University of the Western Cape, (28) Department of Physics The George Washington University), (2) CSIRO Astronomy & Space Science, (3) International Centre for Radio Astronomy Research Curtin, 4), (4) Instituto de Fisica de Cantabria, (5) Jodrell Bank Centre for Astrophysics, 6), 6) ((1) Australian Astronomical Observatory, (6) Anton Pannekoek Institute for Astronomy, (7) Laboratoire Lagrange Universite Cote d'Azur, (8) Laboratoire AIM CEA/DSM-CNRS-Universite Paris Diderot, (9) Departamento de Fisica Universidad de Oviedo, A. J. van der Horst (28, A. M. Hopkins (1), A. Shulevski (14, Astronomy University of Bologna, C. A. Hales (10, C. Ferrari (7), D. Carbone (6), D. Herranz (4), D. Rafferty (22), E. Orru (14), E. Schisano (20), G. Heald (14, H. Garsden (8), H. J. A. Rottgering (23), J. Gonzalez-Nuevo (9, J. Swinbank (25, K. E. Chow (2), L. Bonavera (4), L. Rudnick (24), M. Huynh (16), M. Lopez-Caniego (17, M. Massardi (18), M. Pestalozzi (20), M. T. Whiting (2), N. Mohan (19), N. Seymour (3), P. J. Hancock (3, R. Breton (5), R. J. Jurek (2), R. Paladino (21, R. Pizzo (14), R. P. Norris (2), R. Taylor (26, S. Molinari (20), T. M. O. Franzen (3)","submitted_at":"2015-09-14T02:43:46Z","abstract_excerpt":"The Evolutionary Map of the Universe (EMU) is a proposed radio continuum survey of the Southern Hemisphere up to declination +30 deg., with the Australian Square Kilometre Array Pathfinder (ASKAP). EMU will use an automated source identification and measurement approach that is demonstrably optimal, to maximise the reliability, utility and robustness of the resulting radio source catalogues. As part of the process of achieving this aim, a \"Data Challenge\" has been conducted, providing international teams the opportunity to test a variety of source finders on a set of simulated images. The aim "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03931","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":"2026-05-18T01:26:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xs6YVAmsMcecFO2qbv/unBD6w1SGUhHOVSfls+ScunfwEVQv3RfjeyYR3KOqyYncBln5kmKmHryUi+gd6qdKBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T08:48:37.572229Z"},"content_sha256":"f3f9587d8881bb9ad80aad8548a6ebe111809c8f0af7430da17067271bae1bee","schema_version":"1.0","event_id":"sha256:f3f9587d8881bb9ad80aad8548a6ebe111809c8f0af7430da17067271bae1bee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MLNSNNE356K544RJDVO764OJM3/bundle.json","state_url":"https://pith.science/pith/MLNSNNE356K544RJDVO764OJM3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MLNSNNE356K544RJDVO764OJM3/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":"2026-06-04T08:48:37Z","links":{"resolver":"https://pith.science/pith/MLNSNNE356K544RJDVO764OJM3","bundle":"https://pith.science/pith/MLNSNNE356K544RJDVO764OJM3/bundle.json","state":"https://pith.science/pith/MLNSNNE356K544RJDVO764OJM3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MLNSNNE356K544RJDVO764OJM3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:MLNSNNE356K544RJDVO764OJM3","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":"ced1425f89bbefbd040b7b188d25a2d74e25a7b4e0bbde337eed2a6f810f9398","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-14T02:43:46Z","title_canon_sha256":"da760e4e336353c31b0b49ad8b34e247a1d35122768c48ebb9097d8c00a03134"},"schema_version":"1.0","source":{"id":"1509.03931","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03931","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03931v1","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03931","created_at":"2026-05-18T01:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"MLNSNNE356K5","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_16","alias_value":"MLNSNNE356K544RJ","created_at":"2026-05-18T12:29:32Z"},{"alias_kind":"pith_short_8","alias_value":"MLNSNNE3","created_at":"2026-05-18T12:29:32Z"}],"graph_snapshots":[{"event_id":"sha256:f3f9587d8881bb9ad80aad8548a6ebe111809c8f0af7430da17067271bae1bee","target":"graph","created_at":"2026-05-18T01:26:41Z","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 Evolutionary Map of the Universe (EMU) is a proposed radio continuum survey of the Southern Hemisphere up to declination +30 deg., with the Australian Square Kilometre Array Pathfinder (ASKAP). EMU will use an automated source identification and measurement approach that is demonstrably optimal, to maximise the reliability, utility and robustness of the resulting radio source catalogues. As part of the process of achieving this aim, a \"Data Challenge\" has been conducted, providing international teams the opportunity to test a variety of source finders on a set of simulated images. The aim ","authors_text":"(10) National Radio Astronomical Observatory, 11), (11) Jansky Fellow NRAO, 12, (12) School of Physics The University of Sydney, 13), (13) ARC Centre of Excellence for All-Sky Astrophysics, (14) ASTRON the Netherlands Institute for Radio Astronomy, 15), (15) University of Groningen Kapteyn Astronomical Institute, (16) International Centre for Radio Astronomy Research UWA, (17) European Space Agency ESAC Planck Science Office, 18), (18) INAF Istituto di Radioastronomia Bologna, (19) National Centre for Radio Astrophysics Tata Institute of Fundamental Research, (20) IAPS INAF via del Fosso del Cavaliere 100 Rome, (21) Department of Physics, (22) Hamburger Sternwarte Universitat Hamburg, (23) Leiden Observatory Leiden University, (24) Minnesota Institute for Astrophysics University of Minnesota, (25) Department of Astrophysical Sciences Princeton University, (26) Department of Astronomy University of Cape Town, 27), (27) Department of Physics University of the Western Cape, (28) Department of Physics The George Washington University), (2) CSIRO Astronomy & Space Science, (3) International Centre for Radio Astronomy Research Curtin, 4), (4) Instituto de Fisica de Cantabria, (5) Jodrell Bank Centre for Astrophysics, 6), 6) ((1) Australian Astronomical Observatory, (6) Anton Pannekoek Institute for Astronomy, (7) Laboratoire Lagrange Universite Cote d'Azur, (8) Laboratoire AIM CEA/DSM-CNRS-Universite Paris Diderot, (9) Departamento de Fisica Universidad de Oviedo, A. J. van der Horst (28, A. M. Hopkins (1), A. Shulevski (14, Astronomy University of Bologna, C. A. Hales (10, C. Ferrari (7), D. Carbone (6), D. Herranz (4), D. Rafferty (22), E. Orru (14), E. Schisano (20), G. Heald (14, H. Garsden (8), H. J. A. Rottgering (23), J. Gonzalez-Nuevo (9, J. Swinbank (25, K. E. Chow (2), L. Bonavera (4), L. Rudnick (24), M. Huynh (16), M. Lopez-Caniego (17, M. Massardi (18), M. Pestalozzi (20), M. T. Whiting (2), N. Mohan (19), N. Seymour (3), P. J. Hancock (3, R. Breton (5), R. J. Jurek (2), R. Paladino (21, R. Pizzo (14), R. P. Norris (2), R. Taylor (26, S. Molinari (20), T. M. O. Franzen (3)","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-14T02:43:46Z","title":"The ASKAP/EMU Source Finding Data Challenge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03931","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":"sha256:314b6cec8eab2895a50ce391b0434074fc4d2dd0832b980bc2813de37ae09542","target":"record","created_at":"2026-05-18T01:26:41Z","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":"ced1425f89bbefbd040b7b188d25a2d74e25a7b4e0bbde337eed2a6f810f9398","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-09-14T02:43:46Z","title_canon_sha256":"da760e4e336353c31b0b49ad8b34e247a1d35122768c48ebb9097d8c00a03134"},"schema_version":"1.0","source":{"id":"1509.03931","kind":"arxiv","version":1}},"canonical_sha256":"62db26b49bef95de72291d5dff71c966ce90bc0ba5aa57491e64f35c0d07bb17","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"62db26b49bef95de72291d5dff71c966ce90bc0ba5aa57491e64f35c0d07bb17","first_computed_at":"2026-05-18T01:26:41.608985Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:26:41.608985Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xJGqAYpsnLph6y7HPWjM3w+re2+N367AnoHskUyHoebX6HHvaUbb8nA/1tBBhi+HZwLFbWPqtgpqA1Gez+LECw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:26:41.609584Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03931","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:314b6cec8eab2895a50ce391b0434074fc4d2dd0832b980bc2813de37ae09542","sha256:f3f9587d8881bb9ad80aad8548a6ebe111809c8f0af7430da17067271bae1bee"],"state_sha256":"2fe49dfa0f1b7fc5f585db82e7821fa5f6495bbcd60c78610a963036d619f51d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"B8VVxXBhB11YKcFcrZLb4coq4FFZUeKn6BEroztL6tLGCahEs70kXqHWV/+E9dr7y4pDsDkluwj9uJEAtIepAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T08:48:37.574577Z","bundle_sha256":"a2bef9e1d2c614122f62cad114c6e9cb8750e1916c5a76742a24a9eecbc2b21a"}}