{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:R5UWYDFDN3RUQ2RS7OCXJS652Z","short_pith_number":"pith:R5UWYDFD","canonical_record":{"source":{"id":"1604.02062","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-07T16:26:34Z","cross_cats_sorted":[],"title_canon_sha256":"ef079df41f4430bb26eeb4d6b38e8a64d1d5e651d75176af3d730b68a2ea8bcf","abstract_canon_sha256":"7d1ef869e0b85760208fb026d4356d0618d883fe13a4431342ee631774e1f172"},"schema_version":"1.0"},"canonical_sha256":"8f696c0ca36ee3486a32fb8574cbddd64666d2e98283e00d9336328149193b73","source":{"kind":"arxiv","id":"1604.02062","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02062","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02062v1","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02062","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"pith_short_12","alias_value":"R5UWYDFDN3RU","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"R5UWYDFDN3RUQ2RS","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"R5UWYDFD","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:R5UWYDFDN3RUQ2RS7OCXJS652Z","target":"record","payload":{"canonical_record":{"source":{"id":"1604.02062","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-07T16:26:34Z","cross_cats_sorted":[],"title_canon_sha256":"ef079df41f4430bb26eeb4d6b38e8a64d1d5e651d75176af3d730b68a2ea8bcf","abstract_canon_sha256":"7d1ef869e0b85760208fb026d4356d0618d883fe13a4431342ee631774e1f172"},"schema_version":"1.0"},"canonical_sha256":"8f696c0ca36ee3486a32fb8574cbddd64666d2e98283e00d9336328149193b73","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:17:31.338367Z","signature_b64":"3xL/sVGYhP4X52pDTDK+PlEs/t9YavMQBRNrAIqN3z/j9gIRsJxvCZpkCt5Y2o2XXUY2J06XQB4KeifI0thSBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8f696c0ca36ee3486a32fb8574cbddd64666d2e98283e00d9336328149193b73","last_reissued_at":"2026-05-18T01:17:31.337612Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:17:31.337612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.02062","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":"2026-05-18T01:17:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sOY99njUQX6IGyd/BY2QnRZWJ9TZsvROOlkZlp64+jLCtfwcH7IAYzAAJ+oywLCdTlNpk3fNIhkp/Yv7pNt1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:58:27.929096Z"},"content_sha256":"6b6952d228a6f4c92b9fcc8758434e7dc61eb447bff182b9ea6a0a4ca26b81c7","schema_version":"1.0","event_id":"sha256:6b6952d228a6f4c92b9fcc8758434e7dc61eb447bff182b9ea6a0a4ca26b81c7"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:R5UWYDFDN3RUQ2RS7OCXJS652Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarization of Cosmic Microwave Background","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Alessandro Buzzelli, Giancarlo De Gasperis, Nicola Vittorio, Paolo Cabella","submitted_at":"2016-04-07T16:26:34Z","abstract_excerpt":"In this work we present an extension of the ROMA map-making code for data analysis of Cosmic Microwave Background polarization, with particular attention given to the inflationary polarization B-modes. The new algorithm takes into account a possible cross-correlated noise component among the different detectors of a CMB experiment. We tested the code on the observational data of the BOOMERanG (2003) experiment and we show that we are provided with a better estimate of the power spectra, in particular the error bars of the BB spectrum are smaller up to 20% for low multipoles. We point out the g"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02062","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":"2026-05-18T01:17:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RSrNV7itO2+kAmZ+uTcLTcfAMpr8KyYOS8CSwqoRmMzw4zcsbOHGYQaRxtb8glli1x3PVBIXy6DjPtJ3A6pMBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T18:58:27.929827Z"},"content_sha256":"8e729ccf35b64359ed65c0c009e3e9d047f678ea278935756e5229f06ce39a66","schema_version":"1.0","event_id":"sha256:8e729ccf35b64359ed65c0c009e3e9d047f678ea278935756e5229f06ce39a66"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/bundle.json","state_url":"https://pith.science/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/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":"2026-05-25T18:58:27Z","links":{"resolver":"https://pith.science/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z","bundle":"https://pith.science/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/bundle.json","state":"https://pith.science/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R5UWYDFDN3RUQ2RS7OCXJS652Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:R5UWYDFDN3RUQ2RS7OCXJS652Z","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":"7d1ef869e0b85760208fb026d4356d0618d883fe13a4431342ee631774e1f172","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-07T16:26:34Z","title_canon_sha256":"ef079df41f4430bb26eeb4d6b38e8a64d1d5e651d75176af3d730b68a2ea8bcf"},"schema_version":"1.0","source":{"id":"1604.02062","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.02062","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"arxiv_version","alias_value":"1604.02062v1","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.02062","created_at":"2026-05-18T01:17:31Z"},{"alias_kind":"pith_short_12","alias_value":"R5UWYDFDN3RU","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"R5UWYDFDN3RUQ2RS","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"R5UWYDFD","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:8e729ccf35b64359ed65c0c009e3e9d047f678ea278935756e5229f06ce39a66","target":"graph","created_at":"2026-05-18T01:17:31Z","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":"In this work we present an extension of the ROMA map-making code for data analysis of Cosmic Microwave Background polarization, with particular attention given to the inflationary polarization B-modes. The new algorithm takes into account a possible cross-correlated noise component among the different detectors of a CMB experiment. We tested the code on the observational data of the BOOMERanG (2003) experiment and we show that we are provided with a better estimate of the power spectra, in particular the error bars of the BB spectrum are smaller up to 20% for low multipoles. We point out the g","authors_text":"Alessandro Buzzelli, Giancarlo De Gasperis, Nicola Vittorio, Paolo Cabella","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-07T16:26:34Z","title":"Polarization of Cosmic Microwave Background"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.02062","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":"sha256:6b6952d228a6f4c92b9fcc8758434e7dc61eb447bff182b9ea6a0a4ca26b81c7","target":"record","created_at":"2026-05-18T01:17:31Z","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":"7d1ef869e0b85760208fb026d4356d0618d883fe13a4431342ee631774e1f172","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-04-07T16:26:34Z","title_canon_sha256":"ef079df41f4430bb26eeb4d6b38e8a64d1d5e651d75176af3d730b68a2ea8bcf"},"schema_version":"1.0","source":{"id":"1604.02062","kind":"arxiv","version":1}},"canonical_sha256":"8f696c0ca36ee3486a32fb8574cbddd64666d2e98283e00d9336328149193b73","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f696c0ca36ee3486a32fb8574cbddd64666d2e98283e00d9336328149193b73","first_computed_at":"2026-05-18T01:17:31.337612Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:17:31.337612Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3xL/sVGYhP4X52pDTDK+PlEs/t9YavMQBRNrAIqN3z/j9gIRsJxvCZpkCt5Y2o2XXUY2J06XQB4KeifI0thSBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:17:31.338367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.02062","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6b6952d228a6f4c92b9fcc8758434e7dc61eb447bff182b9ea6a0a4ca26b81c7","sha256:8e729ccf35b64359ed65c0c009e3e9d047f678ea278935756e5229f06ce39a66"],"state_sha256":"a3044f4feee1c26c4d5990d633d97114f5a49a06ecd6f66082b56ab77d91a3e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pt5rsnuJCUHd8p/dEN1IMziDIIhHpZqOgJEDAd9PyAss/CvB0e2PC+C7cQ9S05ZnnwFEDaZKrAGLxyBvuUKEBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T18:58:27.934132Z","bundle_sha256":"3ae1a810ba8f11ac895bf2992c83e28f101fc06453f516aed5b31f97a739c7ec"}}