{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:WVTM4FJDREPW2SXOAIR3ZEBB2R","short_pith_number":"pith:WVTM4FJD","canonical_record":{"source":{"id":"1808.10349","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-30T15:20:34Z","cross_cats_sorted":[],"title_canon_sha256":"9669e8e64f45ca969aec8fef258e6ea60cb76759990ac8a7f6796caccafc7ca6","abstract_canon_sha256":"10ceb994bf70587937d05a827de9eb2b576f72839416d722913742accd88b694"},"schema_version":"1.0"},"canonical_sha256":"b566ce1523891f6d4aee0223bc9021d452b022df90a3a9c4da3b8eab229d67d4","source":{"kind":"arxiv","id":"1808.10349","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.10349","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1808.10349v2","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.10349","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"WVTM4FJDREPW","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WVTM4FJDREPW2SXO","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WVTM4FJD","created_at":"2026-05-18T12:33:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:WVTM4FJDREPW2SXOAIR3ZEBB2R","target":"record","payload":{"canonical_record":{"source":{"id":"1808.10349","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-30T15:20:34Z","cross_cats_sorted":[],"title_canon_sha256":"9669e8e64f45ca969aec8fef258e6ea60cb76759990ac8a7f6796caccafc7ca6","abstract_canon_sha256":"10ceb994bf70587937d05a827de9eb2b576f72839416d722913742accd88b694"},"schema_version":"1.0"},"canonical_sha256":"b566ce1523891f6d4aee0223bc9021d452b022df90a3a9c4da3b8eab229d67d4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:53:29.041237Z","signature_b64":"ptdPZ/xXgxp2o1MCNY4eEePqkXTranjepgsLDec3iTovrCGWXL7olUD7yuncdmsSUHdymbQ+RfDYWXgP1eVTBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b566ce1523891f6d4aee0223bc9021d452b022df90a3a9c4da3b8eab229d67d4","last_reissued_at":"2026-05-17T23:53:29.040804Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:53:29.040804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1808.10349","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dbuqJdNYKjJIgfei+EQ/Hr9t6BcmPLbzlomVnzc4SEcuSODW0PAVaPwgG7PXiOeaMCUgpyqre8OCwSEWSoVCCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T00:16:30.001721Z"},"content_sha256":"5ebc635d9e1e64ee522b2b729ee605b5fb69cab97f50d5a12f09825966ec8e2d","schema_version":"1.0","event_id":"sha256:5ebc635d9e1e64ee522b2b729ee605b5fb69cab97f50d5a12f09825966ec8e2d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:WVTM4FJDREPW2SXOAIR3ZEBB2R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal constraints on primordial gravitational waves from the lensed CMB","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Julien Carron","submitted_at":"2018-08-30T15:20:34Z","abstract_excerpt":"We demonstrate how to obtain optimal constraints on a primordial gravitational wave component in lensed Cosmic Microwave Background (CMB) data under ideal conditions. We first derive an estimator of the tensor-to-scalar ratio, $r$, by using an error-controlled close approximation to the exact posterior, under the assumption of Gaussian primordial CMB and lensing deflection potential. This combines fast internal iterative lensing reconstruction with optimal recovery of the unlensed CMB. We evaluate its performance on simulated low-noise polarization data targeted at the recombination peak. We c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.10349","kind":"arxiv","version":2},"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":"2026-05-17T23:53:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gw9ny1GI7BuPx0PTO0YztUEsmTV2Cvhg0qZElDLipq8VyO/8uU7ZXrmNZ47NKnf/rqPhBzHv6G2JxdFDTdTgDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T00:16:30.002065Z"},"content_sha256":"afd238de01195915b79a5c20bf1a3ac356f8eae256f3d06850146bcbe0587ce9","schema_version":"1.0","event_id":"sha256:afd238de01195915b79a5c20bf1a3ac356f8eae256f3d06850146bcbe0587ce9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/bundle.json","state_url":"https://pith.science/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/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":"2026-06-05T00:16:30Z","links":{"resolver":"https://pith.science/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R","bundle":"https://pith.science/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/bundle.json","state":"https://pith.science/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WVTM4FJDREPW2SXOAIR3ZEBB2R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WVTM4FJDREPW2SXOAIR3ZEBB2R","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":"10ceb994bf70587937d05a827de9eb2b576f72839416d722913742accd88b694","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-30T15:20:34Z","title_canon_sha256":"9669e8e64f45ca969aec8fef258e6ea60cb76759990ac8a7f6796caccafc7ca6"},"schema_version":"1.0","source":{"id":"1808.10349","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.10349","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"arxiv_version","alias_value":"1808.10349v2","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.10349","created_at":"2026-05-17T23:53:29Z"},{"alias_kind":"pith_short_12","alias_value":"WVTM4FJDREPW","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_16","alias_value":"WVTM4FJDREPW2SXO","created_at":"2026-05-18T12:33:01Z"},{"alias_kind":"pith_short_8","alias_value":"WVTM4FJD","created_at":"2026-05-18T12:33:01Z"}],"graph_snapshots":[{"event_id":"sha256:afd238de01195915b79a5c20bf1a3ac356f8eae256f3d06850146bcbe0587ce9","target":"graph","created_at":"2026-05-17T23:53:29Z","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 demonstrate how to obtain optimal constraints on a primordial gravitational wave component in lensed Cosmic Microwave Background (CMB) data under ideal conditions. We first derive an estimator of the tensor-to-scalar ratio, $r$, by using an error-controlled close approximation to the exact posterior, under the assumption of Gaussian primordial CMB and lensing deflection potential. This combines fast internal iterative lensing reconstruction with optimal recovery of the unlensed CMB. We evaluate its performance on simulated low-noise polarization data targeted at the recombination peak. We c","authors_text":"Julien Carron","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-30T15:20:34Z","title":"Optimal constraints on primordial gravitational waves from the lensed CMB"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.10349","kind":"arxiv","version":2},"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":"sha256:5ebc635d9e1e64ee522b2b729ee605b5fb69cab97f50d5a12f09825966ec8e2d","target":"record","created_at":"2026-05-17T23:53:29Z","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":"10ceb994bf70587937d05a827de9eb2b576f72839416d722913742accd88b694","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2018-08-30T15:20:34Z","title_canon_sha256":"9669e8e64f45ca969aec8fef258e6ea60cb76759990ac8a7f6796caccafc7ca6"},"schema_version":"1.0","source":{"id":"1808.10349","kind":"arxiv","version":2}},"canonical_sha256":"b566ce1523891f6d4aee0223bc9021d452b022df90a3a9c4da3b8eab229d67d4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b566ce1523891f6d4aee0223bc9021d452b022df90a3a9c4da3b8eab229d67d4","first_computed_at":"2026-05-17T23:53:29.040804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:29.040804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ptdPZ/xXgxp2o1MCNY4eEePqkXTranjepgsLDec3iTovrCGWXL7olUD7yuncdmsSUHdymbQ+RfDYWXgP1eVTBw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:29.041237Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.10349","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ebc635d9e1e64ee522b2b729ee605b5fb69cab97f50d5a12f09825966ec8e2d","sha256:afd238de01195915b79a5c20bf1a3ac356f8eae256f3d06850146bcbe0587ce9"],"state_sha256":"df431225a9b6ee4cabf39b18380639ff179fbd4f764917c4ffe7de2b282ffcd9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qh9dPRE6b8wDSdXkrbQHO1nte5agKlUCw799aABcXp1aJ2CfDAJ6nw76qHJh2XQQDqekr/zrOg9U0DXT0hznCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T00:16:30.003982Z","bundle_sha256":"2c4d39f9b205d0c49c6bf93ffbb30bdaadb753e0ead26ec2a61477391f92b2e5"}}