{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:T65GJ4VUCIIHUK4UTMEKV7MYXE","short_pith_number":"pith:T65GJ4VU","canonical_record":{"source":{"id":"1911.03547","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-08T21:21:41Z","cross_cats_sorted":[],"title_canon_sha256":"f9cf98190b32c72436934d5fce3e7003753de202c7e01d00c20fffe5aa2fcb6a","abstract_canon_sha256":"583340a7defd251c3a4f711ad8bd98d6163845912a9a5415f03fbf0c6caad6a4"},"schema_version":"1.0"},"canonical_sha256":"9fba64f2b412107a2b949b08aafd98b91ee4708070f6fbbd018cfac1c9e1f4ce","source":{"kind":"arxiv","id":"1911.03547","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.03547","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"1911.03547v1","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.03547","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"T65GJ4VUCIIH","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_16","alias_value":"T65GJ4VUCIIHUK4U","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_8","alias_value":"T65GJ4VU","created_at":"2026-07-05T00:18:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:T65GJ4VUCIIHUK4UTMEKV7MYXE","target":"record","payload":{"canonical_record":{"source":{"id":"1911.03547","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-08T21:21:41Z","cross_cats_sorted":[],"title_canon_sha256":"f9cf98190b32c72436934d5fce3e7003753de202c7e01d00c20fffe5aa2fcb6a","abstract_canon_sha256":"583340a7defd251c3a4f711ad8bd98d6163845912a9a5415f03fbf0c6caad6a4"},"schema_version":"1.0"},"canonical_sha256":"9fba64f2b412107a2b949b08aafd98b91ee4708070f6fbbd018cfac1c9e1f4ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:18:13.496842Z","signature_b64":"SYnTcHDeeWKbnBi6Jhg0qoSXzDHkv6If7wm5D88f9Kdq3wlKs0xD+x3q7qXP/0ZRFIuaOutSb+jZFbiVLgyMBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fba64f2b412107a2b949b08aafd98b91ee4708070f6fbbd018cfac1c9e1f4ce","last_reissued_at":"2026-07-05T00:18:13.496333Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:18:13.496333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.03547","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":"2026-07-05T00:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vA8MH7yrQuct6tO+iGMjOdePHTvr7+Tb0/VVGEds6nw4Ia/lNSoer3NsTi8PvOWn1CoXLvp1UnXrTezMudpSBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T00:07:52.479936Z"},"content_sha256":"78c4f557dd35ccc87d360967caafd8f5f1464a54d5081ffca62b936c651f63c4","schema_version":"1.0","event_id":"sha256:78c4f557dd35ccc87d360967caafd8f5f1464a54d5081ffca62b936c651f63c4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:T65GJ4VUCIIHUK4UTMEKV7MYXE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deprojecting beam systematics for next-generation CMB B-mode searches","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Christopher Sheehy","submitted_at":"2019-11-08T21:21:41Z","abstract_excerpt":"Measurements of the cosmic microwave background polarization are vulnerable to systematic contamination from beam imperfections. Because the unpolarized CMB T is orders of magnitude larger than the polarized E and B signals, even a tiny difference in instrument response between two orthogonally polarized measurements of the CMB will result in a large non-zero differential signal, even if the CMB is unpolarized. Two strategies to mitigate this temperature-to-polarization leakage are the use of a rotating half-wave-plate and the fitting and removal of leakage templates from the polarized signal."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.03547","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.03547/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:18:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pg+cmPS/wOSNrVUvXP0MQiDTy3qlNdAU17FEkN731jBTMRfEutHlTVbbgCCBVpfWBv9/JrklgTRqoNUpT/zFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T00:07:52.480691Z"},"content_sha256":"66accf81f9819aafea53612b2c8cc22c3348f759474711182c2228b0ae6f5886","schema_version":"1.0","event_id":"sha256:66accf81f9819aafea53612b2c8cc22c3348f759474711182c2228b0ae6f5886"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/bundle.json","state_url":"https://pith.science/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/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":"2026-08-19T00:07:52Z","links":{"resolver":"https://pith.science/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE","bundle":"https://pith.science/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/bundle.json","state":"https://pith.science/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T65GJ4VUCIIHUK4UTMEKV7MYXE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:T65GJ4VUCIIHUK4UTMEKV7MYXE","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":"583340a7defd251c3a4f711ad8bd98d6163845912a9a5415f03fbf0c6caad6a4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-08T21:21:41Z","title_canon_sha256":"f9cf98190b32c72436934d5fce3e7003753de202c7e01d00c20fffe5aa2fcb6a"},"schema_version":"1.0","source":{"id":"1911.03547","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.03547","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"arxiv_version","alias_value":"1911.03547v1","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.03547","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_12","alias_value":"T65GJ4VUCIIH","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_16","alias_value":"T65GJ4VUCIIHUK4U","created_at":"2026-07-05T00:18:13Z"},{"alias_kind":"pith_short_8","alias_value":"T65GJ4VU","created_at":"2026-07-05T00:18:13Z"}],"graph_snapshots":[{"event_id":"sha256:66accf81f9819aafea53612b2c8cc22c3348f759474711182c2228b0ae6f5886","target":"graph","created_at":"2026-07-05T00:18:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.03547/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Measurements of the cosmic microwave background polarization are vulnerable to systematic contamination from beam imperfections. Because the unpolarized CMB T is orders of magnitude larger than the polarized E and B signals, even a tiny difference in instrument response between two orthogonally polarized measurements of the CMB will result in a large non-zero differential signal, even if the CMB is unpolarized. Two strategies to mitigate this temperature-to-polarization leakage are the use of a rotating half-wave-plate and the fitting and removal of leakage templates from the polarized signal.","authors_text":"Christopher Sheehy","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-08T21:21:41Z","title":"Deprojecting beam systematics for next-generation CMB B-mode searches"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.03547","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":"sha256:78c4f557dd35ccc87d360967caafd8f5f1464a54d5081ffca62b936c651f63c4","target":"record","created_at":"2026-07-05T00:18:13Z","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":"583340a7defd251c3a4f711ad8bd98d6163845912a9a5415f03fbf0c6caad6a4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-08T21:21:41Z","title_canon_sha256":"f9cf98190b32c72436934d5fce3e7003753de202c7e01d00c20fffe5aa2fcb6a"},"schema_version":"1.0","source":{"id":"1911.03547","kind":"arxiv","version":1}},"canonical_sha256":"9fba64f2b412107a2b949b08aafd98b91ee4708070f6fbbd018cfac1c9e1f4ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fba64f2b412107a2b949b08aafd98b91ee4708070f6fbbd018cfac1c9e1f4ce","first_computed_at":"2026-07-05T00:18:13.496333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:18:13.496333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"SYnTcHDeeWKbnBi6Jhg0qoSXzDHkv6If7wm5D88f9Kdq3wlKs0xD+x3q7qXP/0ZRFIuaOutSb+jZFbiVLgyMBw==","signature_status":"signed_v1","signed_at":"2026-07-05T00:18:13.496842Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.03547","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:78c4f557dd35ccc87d360967caafd8f5f1464a54d5081ffca62b936c651f63c4","sha256:66accf81f9819aafea53612b2c8cc22c3348f759474711182c2228b0ae6f5886"],"state_sha256":"1737df28b7413dfd528752235eda2ec98b22336aee7827bc1742996a62c1a879"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"030rnsxFA9XAT1FL4KT/ybyFvUaJZLVEnD4Z1mkCCpzVXwvEuKLorazt/BROowFnuplFnIihiQlsDDCMTHi8CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T00:07:52.486227Z","bundle_sha256":"c7300c4ce086d0ab8f234174c0eca7128bcd9fa7d2e23c42991c123287f10be1"}}