{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WJATXB2Z6UVQTMV5E4EMP3BXRW","short_pith_number":"pith:WJATXB2Z","canonical_record":{"source":{"id":"1507.08236","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-27T20:52:43Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"67718005d790ce7d2fa351788e318886a1a67bf982b06c32be27effae1016b88","abstract_canon_sha256":"8faa104e25fe2428e6148560a0f864115353c9d787be71c6f6527373dc3da9c1"},"schema_version":"1.0"},"canonical_sha256":"b2413b8759f52b09b2bd2708c7ec378d807fd09b2a53ae80720c4b5368dcdfca","source":{"kind":"arxiv","id":"1507.08236","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.08236","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.08236v1","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.08236","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"WJATXB2Z6UVQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WJATXB2Z6UVQTMV5","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WJATXB2Z","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WJATXB2Z6UVQTMV5E4EMP3BXRW","target":"record","payload":{"canonical_record":{"source":{"id":"1507.08236","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-27T20:52:43Z","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"title_canon_sha256":"67718005d790ce7d2fa351788e318886a1a67bf982b06c32be27effae1016b88","abstract_canon_sha256":"8faa104e25fe2428e6148560a0f864115353c9d787be71c6f6527373dc3da9c1"},"schema_version":"1.0"},"canonical_sha256":"b2413b8759f52b09b2bd2708c7ec378d807fd09b2a53ae80720c4b5368dcdfca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:06.577573Z","signature_b64":"u5GDQlBVFitTlzxKsJZo72jozXuq0CqOt/reFZy5tlSZu+NuNz5Uw+XOFFsoWOd7EyEZpvkwZa317oz7o8G3AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b2413b8759f52b09b2bd2708c7ec378d807fd09b2a53ae80720c4b5368dcdfca","last_reissued_at":"2026-05-18T01:35:06.577025Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:06.577025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1507.08236","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":"2026-05-18T01:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1RMvl+z3t648DCX1PuD5wQU+IKk4gFHxRoL0llx3PkQZycbARqEsq/L8VCs9NnYuP24n3KY1q2whjeAnL86fCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:36:30.213286Z"},"content_sha256":"56ef4414a7b7a980ce0f02574d3d7aadf5d8ba94fb0d1cf4334d72bf366298e7","schema_version":"1.0","event_id":"sha256:56ef4414a7b7a980ce0f02574d3d7aadf5d8ba94fb0d1cf4334d72bf366298e7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WJATXB2Z6UVQTMV5E4EMP3BXRW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Murchison Widefield Array Observations of Anomalous Variability: A Serendipitous Night-time Detection of Interplanetary Scintillation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE","astro-ph.SR"],"primary_cat":"astro-ph.IM","authors_text":"A. A. Deshpande, A. Williams, B. J. Hazelton, B. M. Gaensler, C. J. Lonsdale, C. L. Williams, C. Trott, D. A. Mitchell, D. L. Kaplan, D. Oberoi, E. Morgan, F. Briggs, G. Bernardi, I. H. Cairns, J. D. Bowman, J. Morgan, J.-P. Macquart, K. S. Srivani, L. Feng, L. J. Greenhill, M. Johnston-Hollitt, N. Hurley-Walker, N. Kudryavtseva, N. Udaya Shankar, P. Hancock, P. K. Manoharan, R. B. Wayth, R. D. Ekers, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, S. J. Tingay, S. M. Ord, S. R. McWhirter, T. Murphy, T. Prabu","submitted_at":"2015-07-27T20:52:43Z","abstract_excerpt":"We present observations of high-amplitude rapid (2 s) variability toward two bright, compact extragalactic radio sources out of several hundred of the brightest radio sources in one of the 30x30 deg MWA Epoch of Reionization fields using the Murchison Widefield Array (MWA) at 155 MHz. After rejecting intrinsic, instrumental, and ionospheric origins we consider the most likely explanation for this variability to be interplanetary scintillation (IPS), likely the result of a large coronal mass ejection propagating from the Sun. This is confirmed by roughly contemporaneous observations with the Oo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.08236","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":"2026-05-18T01:35:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wouVrw2t0C2nJf2hwkEG/O2zh61wsaO7qkDZmtqPgg1K5EFIh+Qk14g9/C4cH49d5S1URkw99B76BmTk3uzQAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T13:36:30.213700Z"},"content_sha256":"cc9536a5b9c4d5c0664de492e6335ca8ff49454e0a7b081d8176a05b1dfbc6d2","schema_version":"1.0","event_id":"sha256:cc9536a5b9c4d5c0664de492e6335ca8ff49454e0a7b081d8176a05b1dfbc6d2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/bundle.json","state_url":"https://pith.science/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/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":"2026-05-26T13:36:30Z","links":{"resolver":"https://pith.science/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW","bundle":"https://pith.science/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/bundle.json","state":"https://pith.science/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WJATXB2Z6UVQTMV5E4EMP3BXRW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WJATXB2Z6UVQTMV5E4EMP3BXRW","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":"8faa104e25fe2428e6148560a0f864115353c9d787be71c6f6527373dc3da9c1","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-27T20:52:43Z","title_canon_sha256":"67718005d790ce7d2fa351788e318886a1a67bf982b06c32be27effae1016b88"},"schema_version":"1.0","source":{"id":"1507.08236","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.08236","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"arxiv_version","alias_value":"1507.08236v1","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.08236","created_at":"2026-05-18T01:35:06Z"},{"alias_kind":"pith_short_12","alias_value":"WJATXB2Z6UVQ","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WJATXB2Z6UVQTMV5","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WJATXB2Z","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:cc9536a5b9c4d5c0664de492e6335ca8ff49454e0a7b081d8176a05b1dfbc6d2","target":"graph","created_at":"2026-05-18T01:35:06Z","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":"We present observations of high-amplitude rapid (2 s) variability toward two bright, compact extragalactic radio sources out of several hundred of the brightest radio sources in one of the 30x30 deg MWA Epoch of Reionization fields using the Murchison Widefield Array (MWA) at 155 MHz. After rejecting intrinsic, instrumental, and ionospheric origins we consider the most likely explanation for this variability to be interplanetary scintillation (IPS), likely the result of a large coronal mass ejection propagating from the Sun. This is confirmed by roughly contemporaneous observations with the Oo","authors_text":"A. A. Deshpande, A. Williams, B. J. Hazelton, B. M. Gaensler, C. J. Lonsdale, C. L. Williams, C. Trott, D. A. Mitchell, D. L. Kaplan, D. Oberoi, E. Morgan, F. Briggs, G. Bernardi, I. H. Cairns, J. D. Bowman, J. Morgan, J.-P. Macquart, K. S. Srivani, L. Feng, L. J. Greenhill, M. Johnston-Hollitt, N. Hurley-Walker, N. Kudryavtseva, N. Udaya Shankar, P. Hancock, P. K. Manoharan, R. B. Wayth, R. D. Ekers, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, S. J. Tingay, S. M. Ord, S. R. McWhirter, T. Murphy, T. Prabu","cross_cats":["astro-ph.HE","astro-ph.SR"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-27T20:52:43Z","title":"Murchison Widefield Array Observations of Anomalous Variability: A Serendipitous Night-time Detection of Interplanetary Scintillation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.08236","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":"sha256:56ef4414a7b7a980ce0f02574d3d7aadf5d8ba94fb0d1cf4334d72bf366298e7","target":"record","created_at":"2026-05-18T01:35:06Z","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":"8faa104e25fe2428e6148560a0f864115353c9d787be71c6f6527373dc3da9c1","cross_cats_sorted":["astro-ph.HE","astro-ph.SR"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-07-27T20:52:43Z","title_canon_sha256":"67718005d790ce7d2fa351788e318886a1a67bf982b06c32be27effae1016b88"},"schema_version":"1.0","source":{"id":"1507.08236","kind":"arxiv","version":1}},"canonical_sha256":"b2413b8759f52b09b2bd2708c7ec378d807fd09b2a53ae80720c4b5368dcdfca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b2413b8759f52b09b2bd2708c7ec378d807fd09b2a53ae80720c4b5368dcdfca","first_computed_at":"2026-05-18T01:35:06.577025Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:06.577025Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u5GDQlBVFitTlzxKsJZo72jozXuq0CqOt/reFZy5tlSZu+NuNz5Uw+XOFFsoWOd7EyEZpvkwZa317oz7o8G3AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:06.577573Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.08236","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:56ef4414a7b7a980ce0f02574d3d7aadf5d8ba94fb0d1cf4334d72bf366298e7","sha256:cc9536a5b9c4d5c0664de492e6335ca8ff49454e0a7b081d8176a05b1dfbc6d2"],"state_sha256":"d087fbf7e7ebb149bc6ec9a4bcdbd93e6b3c198a34d7afcbdf597261f64da6b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5lHA40qXAWvC4EJxtRSudQDUSzPmuQfHB3mgxvyUmGxXlTlitKUkA5mSZ7TapvfNpb54VSK16BwxKiPQCAgdDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T13:36:30.216341Z","bundle_sha256":"8a9653c85e9545c238c54bf18e2fe0429a8c67a6684abf4467a209329158c72b"}}