{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:OI7GKD6K6KWWNGVPOUJG2YYJ35","short_pith_number":"pith:OI7GKD6K","canonical_record":{"source":{"id":"1605.09100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-30T04:24:20Z","cross_cats_sorted":[],"title_canon_sha256":"8df094c8a7dcb54a970b018a382d7bf6367ca9258a72c8dc099b6b105c10823c","abstract_canon_sha256":"91e11635c0ef9cec3cddbe329debe7e3c95bd9300630401c592d13ef333430d2"},"schema_version":"1.0"},"canonical_sha256":"723e650fcaf2ad669aaf75126d6309df740f0e62ae9a7f034b83363e41a04ff4","source":{"kind":"arxiv","id":"1605.09100","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09100","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09100v1","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09100","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"pith_short_12","alias_value":"OI7GKD6K6KWW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OI7GKD6K6KWWNGVP","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OI7GKD6K","created_at":"2026-05-18T12:30:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:OI7GKD6K6KWWNGVPOUJG2YYJ35","target":"record","payload":{"canonical_record":{"source":{"id":"1605.09100","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-30T04:24:20Z","cross_cats_sorted":[],"title_canon_sha256":"8df094c8a7dcb54a970b018a382d7bf6367ca9258a72c8dc099b6b105c10823c","abstract_canon_sha256":"91e11635c0ef9cec3cddbe329debe7e3c95bd9300630401c592d13ef333430d2"},"schema_version":"1.0"},"canonical_sha256":"723e650fcaf2ad669aaf75126d6309df740f0e62ae9a7f034b83363e41a04ff4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:45.096429Z","signature_b64":"ehFqaah39Qi3VvzxFqKbyJtqnXMg36T4oFthfs7bkv92OWT8D9zn1/Ndd+qxkynOshpsvsfRYdF2GVQKYt6NCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"723e650fcaf2ad669aaf75126d6309df740f0e62ae9a7f034b83363e41a04ff4","last_reissued_at":"2026-05-18T01:12:45.096072Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:45.096072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.09100","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":"2026-05-18T01:12:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u9Xagjx6muR5V8Qsj8ilcv9u+roy+Ghx6W1BSkstUZH4E/TUniBV8uKFwOms/ca3Lvx48MkDXzNwpZxhehBcDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:14:51.777845Z"},"content_sha256":"1fb4737576907f023160e22b302dc5052ffce041737b25139a081c4fa65df797","schema_version":"1.0","event_id":"sha256:1fb4737576907f023160e22b302dc5052ffce041737b25139a081c4fa65df797"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:OI7GKD6K6KWWNGVPOUJG2YYJ35","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Time-domain and spectral properties of pulsars at 154 MHz","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.HE","authors_text":"A. A. Deshpande, A. R. Offringa, A. Rowlinson, A. Williams, A. Zic, B. J. Hazelton, B. M. Gaensler, C. J. Lonsdale, C. L. Williams, D. A. Mitchell, D. Dobie, D. L. Kaplan, D. Oberoi, E. Morgan, F. Briggs, G. Bernardi, J. D. Bowman, J. K. Swiggum, J. R. Callingham, K. S. Srivani, L. J. Greenhill, M. E. Bell, M. F. Morales, M. Johnston-Hollitt, N. Hurley-Walker, N. Udaya Shankar, P. Hancock, R. B. Wayth, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, S. Croft, S. Johnston, S. J. Tingay, S. M. Ord, S. R. McWhirter, Tara Murphy, T. Prabu","submitted_at":"2016-05-30T04:24:20Z","abstract_excerpt":"We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range $-80^{\\circ} < {\\delta} < 10^{\\circ}$ we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on timescales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437-4715 and PSR J0630-2834 we observe interstellar scintillation and variability on timescales of greater than 2 minutes. One further pulsar, PSR J0034-0721, showed significant variability, the physical ori"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09100","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":"2026-05-18T01:12:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vrNQXkc6W2n2DeuCYg/NIah7OaTFdbajUAAv9Utq9NR3yOyTGLMKSAQbhKz6CyCZredCcjUN1obTu0VLjJ8jAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T19:14:51.778534Z"},"content_sha256":"9a6eadce0626a70559a45994f8dcc75b5a30d67ee494f99d57fc62d740fc7dd9","schema_version":"1.0","event_id":"sha256:9a6eadce0626a70559a45994f8dcc75b5a30d67ee494f99d57fc62d740fc7dd9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/bundle.json","state_url":"https://pith.science/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/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":"2026-05-26T19:14:51Z","links":{"resolver":"https://pith.science/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35","bundle":"https://pith.science/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/bundle.json","state":"https://pith.science/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OI7GKD6K6KWWNGVPOUJG2YYJ35/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:OI7GKD6K6KWWNGVPOUJG2YYJ35","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":"91e11635c0ef9cec3cddbe329debe7e3c95bd9300630401c592d13ef333430d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-30T04:24:20Z","title_canon_sha256":"8df094c8a7dcb54a970b018a382d7bf6367ca9258a72c8dc099b6b105c10823c"},"schema_version":"1.0","source":{"id":"1605.09100","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09100","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09100v1","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09100","created_at":"2026-05-18T01:12:45Z"},{"alias_kind":"pith_short_12","alias_value":"OI7GKD6K6KWW","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_16","alias_value":"OI7GKD6K6KWWNGVP","created_at":"2026-05-18T12:30:36Z"},{"alias_kind":"pith_short_8","alias_value":"OI7GKD6K","created_at":"2026-05-18T12:30:36Z"}],"graph_snapshots":[{"event_id":"sha256:9a6eadce0626a70559a45994f8dcc75b5a30d67ee494f99d57fc62d740fc7dd9","target":"graph","created_at":"2026-05-18T01:12:45Z","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 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range $-80^{\\circ} < {\\delta} < 10^{\\circ}$ we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on timescales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437-4715 and PSR J0630-2834 we observe interstellar scintillation and variability on timescales of greater than 2 minutes. One further pulsar, PSR J0034-0721, showed significant variability, the physical ori","authors_text":"A. A. Deshpande, A. R. Offringa, A. Rowlinson, A. Williams, A. Zic, B. J. Hazelton, B. M. Gaensler, C. J. Lonsdale, C. L. Williams, D. A. Mitchell, D. Dobie, D. L. Kaplan, D. Oberoi, E. Morgan, F. Briggs, G. Bernardi, J. D. Bowman, J. K. Swiggum, J. R. Callingham, K. S. Srivani, L. J. Greenhill, M. E. Bell, M. F. Morales, M. Johnston-Hollitt, N. Hurley-Walker, N. Udaya Shankar, P. Hancock, R. B. Wayth, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, S. Croft, S. Johnston, S. J. Tingay, S. M. Ord, S. R. McWhirter, Tara Murphy, T. Prabu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-30T04:24:20Z","title":"Time-domain and spectral properties of pulsars at 154 MHz"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09100","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":"sha256:1fb4737576907f023160e22b302dc5052ffce041737b25139a081c4fa65df797","target":"record","created_at":"2026-05-18T01:12:45Z","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":"91e11635c0ef9cec3cddbe329debe7e3c95bd9300630401c592d13ef333430d2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2016-05-30T04:24:20Z","title_canon_sha256":"8df094c8a7dcb54a970b018a382d7bf6367ca9258a72c8dc099b6b105c10823c"},"schema_version":"1.0","source":{"id":"1605.09100","kind":"arxiv","version":1}},"canonical_sha256":"723e650fcaf2ad669aaf75126d6309df740f0e62ae9a7f034b83363e41a04ff4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"723e650fcaf2ad669aaf75126d6309df740f0e62ae9a7f034b83363e41a04ff4","first_computed_at":"2026-05-18T01:12:45.096072Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:45.096072Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ehFqaah39Qi3VvzxFqKbyJtqnXMg36T4oFthfs7bkv92OWT8D9zn1/Ndd+qxkynOshpsvsfRYdF2GVQKYt6NCw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:45.096429Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.09100","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1fb4737576907f023160e22b302dc5052ffce041737b25139a081c4fa65df797","sha256:9a6eadce0626a70559a45994f8dcc75b5a30d67ee494f99d57fc62d740fc7dd9"],"state_sha256":"46a7fd4d4a658d08b4857541b1478a7c2fd7fee6fa19151da3fb6300e9530a4a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OSYguCqyGtvR+V97jUbS49DalT+BCBmn5TW5wrpWuP/vVdk50igobZOO0n/Lb2aHkVuQ/QxlEM7HGcYZpy3iDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T19:14:51.782155Z","bundle_sha256":"574d56e558094d0a43b1e44e8d48a87023ae76bb6dea32b123c1950e573a0d98"}}