{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:3CGR3TG4OVSL3TKM2GNRDPUXKW","short_pith_number":"pith:3CGR3TG4","canonical_record":{"source":{"id":"1407.4745","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-17T17:31:05Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"fbd9c0d0bc037fbccd5d31243f18c67ac081f28c7753315aa17eb56dd20105d8","abstract_canon_sha256":"bed9ff0859bfa2567aad2e0dbd584bac54ec8ac3b4230d40f81bc64a680dd628"},"schema_version":"1.0"},"canonical_sha256":"d88d1dccdc7564bdcd4cd19b11be97559a33d59a8d19e7f88e5cb9990e8b1244","source":{"kind":"arxiv","id":"1407.4745","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.4745","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"arxiv_version","alias_value":"1407.4745v1","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.4745","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"pith_short_12","alias_value":"3CGR3TG4OVSL","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3CGR3TG4OVSL3TKM","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3CGR3TG4","created_at":"2026-05-18T12:28:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:3CGR3TG4OVSL3TKM2GNRDPUXKW","target":"record","payload":{"canonical_record":{"source":{"id":"1407.4745","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-17T17:31:05Z","cross_cats_sorted":["astro-ph.HE"],"title_canon_sha256":"fbd9c0d0bc037fbccd5d31243f18c67ac081f28c7753315aa17eb56dd20105d8","abstract_canon_sha256":"bed9ff0859bfa2567aad2e0dbd584bac54ec8ac3b4230d40f81bc64a680dd628"},"schema_version":"1.0"},"canonical_sha256":"d88d1dccdc7564bdcd4cd19b11be97559a33d59a8d19e7f88e5cb9990e8b1244","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:42:34.309581Z","signature_b64":"D9qG3EL0zotzmaEsGBv11Lt5K3FKXMYZO+8wAMW82W0ATqNf/auMt7TacZEKuScelsMptk3O9IwGbv7jcx3UCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d88d1dccdc7564bdcd4cd19b11be97559a33d59a8d19e7f88e5cb9990e8b1244","last_reissued_at":"2026-05-18T01:42:34.309091Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:42:34.309091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.4745","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":"2026-05-18T01:42:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8jAaCwlXJI2RnKON/sZpL0j6f20bcoFDy/QD0UHTYHtLgJ8wGC+tJGah2N6EL0Flcx2hwHYOlbItphVmxpRQCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:46:09.987911Z"},"content_sha256":"900d928a76697aff62271984bf278afbf13f867773b13e59538484c208d42877","schema_version":"1.0","event_id":"sha256:900d928a76697aff62271984bf278afbf13f867773b13e59538484c208d42877"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:3CGR3TG4OVSL3TKM2GNRDPUXKW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The low-frequency characteristics of PSR J0437-4715 observed with the Murchison Widefield Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.HE"],"primary_cat":"astro-ph.SR","authors_text":"Alan E. E. Rogers, Alan Whitney, Avinash Deshpande, A. Williams, Brian Corey, Bryna Hazelton, C.J. Lonsdale, C.L. Wiliams, D.A. Mitchell, D.A. Roshi, David Kaplan, D. Emerich, Divya Oberoi, Edward H. Morgan, E. Kratzenberg, F. Briggs, G. Bernardi, Jacqueline N. Hewitt, Judd Bowman, Justin Kasper, K.S. Srivani, Lincoln Greenhill, Melanie Johnston-Hollitt, Miguel Morales, M.J. Lynch, M. Waterson, N. D. Ramesh Bhat, N. UdayaShankar, Rachel Webster, Randall Wayth, R Goeke, R.J. Cappallo, R. Subramanyan, S.E. Tremblay, S.J. Tingay, S. McWhirter, S.M. Ord, S. Oronsaye, Thayagaraja Prabu, W. van Straten","submitted_at":"2014-07-17T17:31:05Z","abstract_excerpt":"We report on the detection of the millisecond pulsar PSR J0437-4715 with the Murchison Widefield Array (MWA) at a frequency of 192 MHz. Our observations show rapid modulations of pulse intensity in time and frequency that arise from diffractive scintillation effects in the interstellar medium (ISM), as well as prominent drifts of intensity maxima in the time-frequency plane that arise from refractive effects. Our analysis suggests that the scattering screen is located at a distance of $\\sim$80-120 pc from the Sun, in disagreement with a recent claim that the screen is closer ($\\sim$10 pc). Com"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.4745","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":"2026-05-18T01:42:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"N2QnoQGXOMqWYWY89fyiRGXurABfBIMvN9mzm8NgGADlfD8BWnKGuO4z6KbI1Mtqe3ZV+w1BKVajLe5dg/MGDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T04:46:09.988782Z"},"content_sha256":"5ef160694391217d371ee7d6fada0de5345ffe209c61b183288f9f190e8e8626","schema_version":"1.0","event_id":"sha256:5ef160694391217d371ee7d6fada0de5345ffe209c61b183288f9f190e8e8626"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/bundle.json","state_url":"https://pith.science/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/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":"2026-08-06T04:46:09Z","links":{"resolver":"https://pith.science/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW","bundle":"https://pith.science/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/bundle.json","state":"https://pith.science/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3CGR3TG4OVSL3TKM2GNRDPUXKW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:3CGR3TG4OVSL3TKM2GNRDPUXKW","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":"bed9ff0859bfa2567aad2e0dbd584bac54ec8ac3b4230d40f81bc64a680dd628","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-17T17:31:05Z","title_canon_sha256":"fbd9c0d0bc037fbccd5d31243f18c67ac081f28c7753315aa17eb56dd20105d8"},"schema_version":"1.0","source":{"id":"1407.4745","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.4745","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"arxiv_version","alias_value":"1407.4745v1","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.4745","created_at":"2026-05-18T01:42:34Z"},{"alias_kind":"pith_short_12","alias_value":"3CGR3TG4OVSL","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_16","alias_value":"3CGR3TG4OVSL3TKM","created_at":"2026-05-18T12:28:11Z"},{"alias_kind":"pith_short_8","alias_value":"3CGR3TG4","created_at":"2026-05-18T12:28:11Z"}],"graph_snapshots":[{"event_id":"sha256:5ef160694391217d371ee7d6fada0de5345ffe209c61b183288f9f190e8e8626","target":"graph","created_at":"2026-05-18T01:42:34Z","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":"We report on the detection of the millisecond pulsar PSR J0437-4715 with the Murchison Widefield Array (MWA) at a frequency of 192 MHz. Our observations show rapid modulations of pulse intensity in time and frequency that arise from diffractive scintillation effects in the interstellar medium (ISM), as well as prominent drifts of intensity maxima in the time-frequency plane that arise from refractive effects. Our analysis suggests that the scattering screen is located at a distance of $\\sim$80-120 pc from the Sun, in disagreement with a recent claim that the screen is closer ($\\sim$10 pc). Com","authors_text":"Alan E. E. Rogers, Alan Whitney, Avinash Deshpande, A. Williams, Brian Corey, Bryna Hazelton, C.J. Lonsdale, C.L. Wiliams, D.A. Mitchell, D.A. Roshi, David Kaplan, D. Emerich, Divya Oberoi, Edward H. Morgan, E. Kratzenberg, F. Briggs, G. Bernardi, Jacqueline N. Hewitt, Judd Bowman, Justin Kasper, K.S. Srivani, Lincoln Greenhill, Melanie Johnston-Hollitt, Miguel Morales, M.J. Lynch, M. Waterson, N. D. Ramesh Bhat, N. UdayaShankar, Rachel Webster, Randall Wayth, R Goeke, R.J. Cappallo, R. Subramanyan, S.E. Tremblay, S.J. Tingay, S. McWhirter, S.M. Ord, S. Oronsaye, Thayagaraja Prabu, W. van Straten","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-17T17:31:05Z","title":"The low-frequency characteristics of PSR J0437-4715 observed with the Murchison Widefield Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.4745","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":"sha256:900d928a76697aff62271984bf278afbf13f867773b13e59538484c208d42877","target":"record","created_at":"2026-05-18T01:42:34Z","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":"bed9ff0859bfa2567aad2e0dbd584bac54ec8ac3b4230d40f81bc64a680dd628","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2014-07-17T17:31:05Z","title_canon_sha256":"fbd9c0d0bc037fbccd5d31243f18c67ac081f28c7753315aa17eb56dd20105d8"},"schema_version":"1.0","source":{"id":"1407.4745","kind":"arxiv","version":1}},"canonical_sha256":"d88d1dccdc7564bdcd4cd19b11be97559a33d59a8d19e7f88e5cb9990e8b1244","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d88d1dccdc7564bdcd4cd19b11be97559a33d59a8d19e7f88e5cb9990e8b1244","first_computed_at":"2026-05-18T01:42:34.309091Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:42:34.309091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D9qG3EL0zotzmaEsGBv11Lt5K3FKXMYZO+8wAMW82W0ATqNf/auMt7TacZEKuScelsMptk3O9IwGbv7jcx3UCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:42:34.309581Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.4745","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:900d928a76697aff62271984bf278afbf13f867773b13e59538484c208d42877","sha256:5ef160694391217d371ee7d6fada0de5345ffe209c61b183288f9f190e8e8626"],"state_sha256":"7fc72380d712a6b97e9e254a1420dbfd821c2dc6978205e6c4329b8ff08d4d71"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JKXiQHYVtfCDzXfNfv8oHKklh7qiqMovzF58BgOn0ZIQZ3m1JR7E7CSbz5qI+knYMGI15TA49/nOQbw4DCHRBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T04:46:09.994500Z","bundle_sha256":"5ca15042c293a50801537985b5392196d1525b56103e54598869e5fac8d5fb54"}}