{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IBLK27LSB47QCWGQ6GKSO7EJPC","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":"a20f28c3d26b5ae8ee78f44b7521ca7e877aa7ef48aea95c513f208227f87d9c","cross_cats_sorted":["astro-ph.HE","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-30T11:07:14Z","title_canon_sha256":"1d10d68608d91e18a31642604ff825802a53236d9d83ea2e4765808284e2dea5"},"schema_version":"1.0","source":{"id":"1512.08908","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.08908","created_at":"2026-05-18T01:20:40Z"},{"alias_kind":"arxiv_version","alias_value":"1512.08908v1","created_at":"2026-05-18T01:20:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.08908","created_at":"2026-05-18T01:20:40Z"},{"alias_kind":"pith_short_12","alias_value":"IBLK27LSB47Q","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IBLK27LSB47QCWGQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IBLK27LS","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:ccc3de6b56846126929cc73e6608849be6ba468c028cc2354ac2a152331bde37","target":"graph","created_at":"2026-05-18T01:20:40Z","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":"Low-frequency observations of pulsars provide a powerful means for probing the microstructure in the turbulent interstellar medium (ISM). Here we report on high-resolution dynamic spectral analysis of our observations of the timing-array millisecond pulsar J0437-4715 with the Murchison Widefield Array (MWA), enabled by our recently commissioned tied-array beam processing pipeline for voltage data recorded from the high time resolution mode of the MWA. A secondary spectral analysis reveals faint parabolic arcs, akin to those seen in high-frequency observations of pulsars with the Green Bank and","authors_text":"2), 2) ((1) International Centre for Radio Astronomy Research, (2) ARC Centre of Excellence for All-sky Astrophysics (CAASTRO)), Australia, Bentley, Curtin University, N. D. R. Bhat (1, S. E. Tremblay (1, S. J. McSweeney (1, S. J. Tingay (1, S. M. Ord (1, WA 6102","cross_cats":["astro-ph.HE","astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-30T11:07:14Z","title":"Scintillation arcs in low-frequency observations of the timing-array millisecond pulsar J0437-4715"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.08908","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":"sha256:55bb0631a05ac2bd0495bfc3453b12759be113c129ac11253408547090bb76ed","target":"record","created_at":"2026-05-18T01:20:40Z","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":"a20f28c3d26b5ae8ee78f44b7521ca7e877aa7ef48aea95c513f208227f87d9c","cross_cats_sorted":["astro-ph.HE","astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2015-12-30T11:07:14Z","title_canon_sha256":"1d10d68608d91e18a31642604ff825802a53236d9d83ea2e4765808284e2dea5"},"schema_version":"1.0","source":{"id":"1512.08908","kind":"arxiv","version":1}},"canonical_sha256":"4056ad7d720f3f0158d0f195277c897880fe9801cd1479f308de9b25e33c8773","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4056ad7d720f3f0158d0f195277c897880fe9801cd1479f308de9b25e33c8773","first_computed_at":"2026-05-18T01:20:40.752177Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:40.752177Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NKj+hMPtmaG8hsRoR7Stq/zHTkEh1Nn/ZXgWzBS/r1uG1GrkmYpHq3FWTrDaqOEWO2F+eH+4KiEq2a9JvqGVCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:40.752808Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.08908","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:55bb0631a05ac2bd0495bfc3453b12759be113c129ac11253408547090bb76ed","sha256:ccc3de6b56846126929cc73e6608849be6ba468c028cc2354ac2a152331bde37"],"state_sha256":"106771f9f5fa17788bcf508074f015ca2004deabb2be1eb2317881c2d8ab0837"}