{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:CDFQT5XKMT6HZY7HTSAEALEZMG","short_pith_number":"pith:CDFQT5XK","canonical_record":{"source":{"id":"1210.2469","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-09T01:44:53Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"08712737ace8e365e5aa70aafc07cff66e8e1d6c73e187ba4c9ee7db45de46a0","abstract_canon_sha256":"1ea4bf8577902505b237a3897468bf3df3a3bbba3c50f1c582501139993b3230"},"schema_version":"1.0"},"canonical_sha256":"10cb09f6ea64fc7ce3e79c80402c9961814e78904cb7b7a0f76443bf068194fd","source":{"kind":"arxiv","id":"1210.2469","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2469","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2469v3","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2469","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"pith_short_12","alias_value":"CDFQT5XKMT6H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CDFQT5XKMT6HZY7H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CDFQT5XK","created_at":"2026-05-18T12:27:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:CDFQT5XKMT6HZY7HTSAEALEZMG","target":"record","payload":{"canonical_record":{"source":{"id":"1210.2469","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-09T01:44:53Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"08712737ace8e365e5aa70aafc07cff66e8e1d6c73e187ba4c9ee7db45de46a0","abstract_canon_sha256":"1ea4bf8577902505b237a3897468bf3df3a3bbba3c50f1c582501139993b3230"},"schema_version":"1.0"},"canonical_sha256":"10cb09f6ea64fc7ce3e79c80402c9961814e78904cb7b7a0f76443bf068194fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:05:01.638831Z","signature_b64":"jawPwhhkVFLzlEQKhleMbLwCopqWjjDkXAzsYfHFvhDM5ceGZchxxxqIFPAifRw8cYNvAcHGA4QI/ekK8y8CDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"10cb09f6ea64fc7ce3e79c80402c9961814e78904cb7b7a0f76443bf068194fd","last_reissued_at":"2026-05-18T03:05:01.638176Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:05:01.638176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1210.2469","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:05:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OWPW4DXUkGem023Y8KorXrIIxN4raqtQV6rGWMm7UGlPE0po0GwN6D7t1rKYaRl3TSDy7+VGSTIebu7QOzqnDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T19:02:44.826740Z"},"content_sha256":"30a04e9d3ee94ef0c4add6a26d90d2b0c49d25c1913f57536394e0cb1ec36056","schema_version":"1.0","event_id":"sha256:30a04e9d3ee94ef0c4add6a26d90d2b0c49d25c1913f57536394e0cb1ec36056"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:CDFQT5XKMT6HZY7HTSAEALEZMG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Benefits of VLBI Astrometry to Pulsar Timing Array Searches for Gravitational Radiation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.HE","authors_text":"D. R. Madison, J. M. Cordes, S. Chatterjee","submitted_at":"2012-10-09T01:44:53Z","abstract_excerpt":"Precision astrometry is an integral component of successful pulsar timing campaigns. Astrometric parameters are commonly derived by fitting them as parameters of a timing model to a series of pulse times of arrival (TOAs). TOAs measured to microsecond precision over several-year spans can yield position measurements with sub-milliarcsecond precision. However, timing-based astrometry can become biased if a pulsar displays any red spin noise, which can be compared to the red noise signal produced by the stochastic gravitational wave background. We investigate how noise of different spectral type"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2469","kind":"arxiv","version":3},"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":"2026-05-18T03:05:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kzxAHc4Ft3ItiLdG5pzZAtjj6pK4USu6DPlQMd3SPlNwfzDmKh+ERVJTpOFSuNIY79AQ9709yIZTa9ElCPPHAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T19:02:44.827129Z"},"content_sha256":"c3ba1ebc833fb2025ae875f284d8eeab7141c398bae05a5ec7f6463e19b4fed0","schema_version":"1.0","event_id":"sha256:c3ba1ebc833fb2025ae875f284d8eeab7141c398bae05a5ec7f6463e19b4fed0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/bundle.json","state_url":"https://pith.science/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/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":"2026-05-19T19:02:44Z","links":{"resolver":"https://pith.science/pith/CDFQT5XKMT6HZY7HTSAEALEZMG","bundle":"https://pith.science/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/bundle.json","state":"https://pith.science/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CDFQT5XKMT6HZY7HTSAEALEZMG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:CDFQT5XKMT6HZY7HTSAEALEZMG","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":"1ea4bf8577902505b237a3897468bf3df3a3bbba3c50f1c582501139993b3230","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-09T01:44:53Z","title_canon_sha256":"08712737ace8e365e5aa70aafc07cff66e8e1d6c73e187ba4c9ee7db45de46a0"},"schema_version":"1.0","source":{"id":"1210.2469","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1210.2469","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"arxiv_version","alias_value":"1210.2469v3","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1210.2469","created_at":"2026-05-18T03:05:01Z"},{"alias_kind":"pith_short_12","alias_value":"CDFQT5XKMT6H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_16","alias_value":"CDFQT5XKMT6HZY7H","created_at":"2026-05-18T12:27:01Z"},{"alias_kind":"pith_short_8","alias_value":"CDFQT5XK","created_at":"2026-05-18T12:27:01Z"}],"graph_snapshots":[{"event_id":"sha256:c3ba1ebc833fb2025ae875f284d8eeab7141c398bae05a5ec7f6463e19b4fed0","target":"graph","created_at":"2026-05-18T03:05:01Z","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":"Precision astrometry is an integral component of successful pulsar timing campaigns. Astrometric parameters are commonly derived by fitting them as parameters of a timing model to a series of pulse times of arrival (TOAs). TOAs measured to microsecond precision over several-year spans can yield position measurements with sub-milliarcsecond precision. However, timing-based astrometry can become biased if a pulsar displays any red spin noise, which can be compared to the red noise signal produced by the stochastic gravitational wave background. We investigate how noise of different spectral type","authors_text":"D. R. Madison, J. M. Cordes, S. Chatterjee","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-09T01:44:53Z","title":"The Benefits of VLBI Astrometry to Pulsar Timing Array Searches for Gravitational Radiation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.2469","kind":"arxiv","version":3},"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":"sha256:30a04e9d3ee94ef0c4add6a26d90d2b0c49d25c1913f57536394e0cb1ec36056","target":"record","created_at":"2026-05-18T03:05:01Z","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":"1ea4bf8577902505b237a3897468bf3df3a3bbba3c50f1c582501139993b3230","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.HE","submitted_at":"2012-10-09T01:44:53Z","title_canon_sha256":"08712737ace8e365e5aa70aafc07cff66e8e1d6c73e187ba4c9ee7db45de46a0"},"schema_version":"1.0","source":{"id":"1210.2469","kind":"arxiv","version":3}},"canonical_sha256":"10cb09f6ea64fc7ce3e79c80402c9961814e78904cb7b7a0f76443bf068194fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"10cb09f6ea64fc7ce3e79c80402c9961814e78904cb7b7a0f76443bf068194fd","first_computed_at":"2026-05-18T03:05:01.638176Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:01.638176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jawPwhhkVFLzlEQKhleMbLwCopqWjjDkXAzsYfHFvhDM5ceGZchxxxqIFPAifRw8cYNvAcHGA4QI/ekK8y8CDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:01.638831Z","signed_message":"canonical_sha256_bytes"},"source_id":"1210.2469","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:30a04e9d3ee94ef0c4add6a26d90d2b0c49d25c1913f57536394e0cb1ec36056","sha256:c3ba1ebc833fb2025ae875f284d8eeab7141c398bae05a5ec7f6463e19b4fed0"],"state_sha256":"71686b51ce73176c71a1fcc1f9cec7ed0782ad6b77928dfc432447bbd23348e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rl3eclnxjktFtV1UEkE2uO2ZYAA7RmJ8U5nXGbanz8al8jRWxMLKMk4wQvk6CmqyT1j2PFBxI5pvTl7mUP7GCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T19:02:44.829124Z","bundle_sha256":"0b813cf5da553bd99d16e37d8877b94291f2316617e48570199ce316a9476886"}}