{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:P7GY7B6RCNJTTMTCW2BB23SYXV","short_pith_number":"pith:P7GY7B6R","canonical_record":{"source":{"id":"2012.01709","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-03T05:24:17Z","cross_cats_sorted":[],"title_canon_sha256":"b28af547da32f7f881dd4d4a6f619ff8d9c6870c35f640fc45d19aaec4482906","abstract_canon_sha256":"2f03b1fb2056a5f0dd39511aeb6e48869b1fa85520fc2d2739f401a8101174f2"},"schema_version":"1.0"},"canonical_sha256":"7fcd8f87d1135339b262b6821d6e58bd5c475a051062fcf439da98291f8e920f","source":{"kind":"arxiv","id":"2012.01709","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01709","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01709v1","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01709","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"P7GY7B6RCNJT","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_16","alias_value":"P7GY7B6RCNJTTMTC","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_8","alias_value":"P7GY7B6R","created_at":"2026-07-05T03:40:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:P7GY7B6RCNJTTMTCW2BB23SYXV","target":"record","payload":{"canonical_record":{"source":{"id":"2012.01709","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-03T05:24:17Z","cross_cats_sorted":[],"title_canon_sha256":"b28af547da32f7f881dd4d4a6f619ff8d9c6870c35f640fc45d19aaec4482906","abstract_canon_sha256":"2f03b1fb2056a5f0dd39511aeb6e48869b1fa85520fc2d2739f401a8101174f2"},"schema_version":"1.0"},"canonical_sha256":"7fcd8f87d1135339b262b6821d6e58bd5c475a051062fcf439da98291f8e920f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:40:29.279907Z","signature_b64":"rnott5oaMnZU/sF8UPAEKf9xxyVQuivECCE64gTV5JkSlQDoK313uZpUvFFgUX1mivEr+X7WXU71pBFv2DGjDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fcd8f87d1135339b262b6821d6e58bd5c475a051062fcf439da98291f8e920f","last_reissued_at":"2026-07-05T03:40:29.279333Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:40:29.279333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2012.01709","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":"2026-07-05T03:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JtSLc7PXKXyH/U7lqcrw/N547a14cOI2x5v5mIXfi/vgObNR/wp1Dtxf31o2Yt5DKK8MZnMH62WOgXW71HtSCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:05:15.308950Z"},"content_sha256":"2418481f0f9b0f6fa294b65a7357ee3152edc257931d3ae1bf07b26483a23e96","schema_version":"1.0","event_id":"sha256:2418481f0f9b0f6fa294b65a7357ee3152edc257931d3ae1bf07b26483a23e96"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:P7GY7B6RCNJTTMTCW2BB23SYXV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. A. Stark, A. J. Anderson, A. Lowitz, A. N. Bender, A. T. Crites, A. T. Lee, B. A. Benson, B. R. Saliwanchik, B. Thorne, C. Corbett Moran, C. L. Chang, C. L. Reichardt, C. M. Daley, C. Pryke, C. Sievers, C. Tucker, D. Li, E. Anderes, E. M. George, F. Bianchini, G. C. Hilton, G. Noble, G. P. Holder, G. Smecher, G. Wang, H. C. Chiang, J. A. Beall, J. D. Hrubes, J. D. Vieira, J. E. Austermann, J. E. Carlstrom, J. E. Ruhl, J. Gallicchio, J. Hubmayr, J. J. McMahon, J. Montgomery, J. P. Nibarger, J. S. Avva, J. W. Henning, K. D. Irwin, K. K. Schaffer, L. E. Bleem, L. Knox, L. M. Mocanu, M. A. Dobbs, M. Millea, N. Goeckner-Wald, N. Gupta, N. Huang, N. W. Halverson, N. Whitehorn, P. A. R. Ade, P. Chaubal, R. Citron, S. Guns, S. Padin, S. Patil, S. S. Meyer, T. de Haan, T-L. Chou, T. M. Crawford, T. Natoli, T. Veach, V. Novosad, V. Yefremenko, W. Everett, W. L. Holzapfel, W. L. K. Wu, Y. Omori","submitted_at":"2020-12-03T05:24:17Z","abstract_excerpt":"We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of the gravitational lensing of the cosmic microwave background (CMB), using 100 deg$^2$ of polarization observations from the SPTpol receiver on the South Pole Telescope. These data reach noise levels as low as 5.8 $\\mu$K-arcmin in polarization, which are low enough that the typically used quadratic estimator (QE) technique for analyzing CMB lensing is significantly sub-optimal. Conversely, the Bayesian procedure extracts all lensing information from the data and is optimal at any noise level. We infer t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01709","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/2012.01709/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":"2026-07-05T03:40:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rfoucn7e4Kkp4tcR+M0T51to8WRBXzNZR8VYUJfnImreR3iUK9QoSJALTb37ZbSSbgd/acvJX4Hz9ww9wJCmBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:05:15.309345Z"},"content_sha256":"6d5b4ea16494aae0d85e107f43378992747a49020ea8a1c53365976f7edcfb25","schema_version":"1.0","event_id":"sha256:6d5b4ea16494aae0d85e107f43378992747a49020ea8a1c53365976f7edcfb25"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/bundle.json","state_url":"https://pith.science/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/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":"2026-07-07T11:05:15Z","links":{"resolver":"https://pith.science/pith/P7GY7B6RCNJTTMTCW2BB23SYXV","bundle":"https://pith.science/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/bundle.json","state":"https://pith.science/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7GY7B6RCNJTTMTCW2BB23SYXV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:P7GY7B6RCNJTTMTCW2BB23SYXV","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":"2f03b1fb2056a5f0dd39511aeb6e48869b1fa85520fc2d2739f401a8101174f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-03T05:24:17Z","title_canon_sha256":"b28af547da32f7f881dd4d4a6f619ff8d9c6870c35f640fc45d19aaec4482906"},"schema_version":"1.0","source":{"id":"2012.01709","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2012.01709","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"arxiv_version","alias_value":"2012.01709v1","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2012.01709","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_12","alias_value":"P7GY7B6RCNJT","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_16","alias_value":"P7GY7B6RCNJTTMTC","created_at":"2026-07-05T03:40:29Z"},{"alias_kind":"pith_short_8","alias_value":"P7GY7B6R","created_at":"2026-07-05T03:40:29Z"}],"graph_snapshots":[{"event_id":"sha256:6d5b4ea16494aae0d85e107f43378992747a49020ea8a1c53365976f7edcfb25","target":"graph","created_at":"2026-07-05T03:40:29Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2012.01709/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We perform the first simultaneous Bayesian parameter inference and optimal reconstruction of the gravitational lensing of the cosmic microwave background (CMB), using 100 deg$^2$ of polarization observations from the SPTpol receiver on the South Pole Telescope. These data reach noise levels as low as 5.8 $\\mu$K-arcmin in polarization, which are low enough that the typically used quadratic estimator (QE) technique for analyzing CMB lensing is significantly sub-optimal. Conversely, the Bayesian procedure extracts all lensing information from the data and is optimal at any noise level. We infer t","authors_text":"A. A. Stark, A. J. Anderson, A. Lowitz, A. N. Bender, A. T. Crites, A. T. Lee, B. A. Benson, B. R. Saliwanchik, B. Thorne, C. Corbett Moran, C. L. Chang, C. L. Reichardt, C. M. Daley, C. Pryke, C. Sievers, C. Tucker, D. Li, E. Anderes, E. M. George, F. Bianchini, G. C. Hilton, G. Noble, G. P. Holder, G. Smecher, G. Wang, H. C. Chiang, J. A. Beall, J. D. Hrubes, J. D. Vieira, J. E. Austermann, J. E. Carlstrom, J. E. Ruhl, J. Gallicchio, J. Hubmayr, J. J. McMahon, J. Montgomery, J. P. Nibarger, J. S. Avva, J. W. Henning, K. D. Irwin, K. K. Schaffer, L. E. Bleem, L. Knox, L. M. Mocanu, M. A. Dobbs, M. Millea, N. Goeckner-Wald, N. Gupta, N. Huang, N. W. Halverson, N. Whitehorn, P. A. R. Ade, P. Chaubal, R. Citron, S. Guns, S. Padin, S. Patil, S. S. Meyer, T. de Haan, T-L. Chou, T. M. Crawford, T. Natoli, T. Veach, V. Novosad, V. Yefremenko, W. Everett, W. L. Holzapfel, W. L. K. Wu, Y. Omori","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-03T05:24:17Z","title":"Optimal CMB Lensing Reconstruction and Parameter Estimation with SPTpol Data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2012.01709","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":"sha256:2418481f0f9b0f6fa294b65a7357ee3152edc257931d3ae1bf07b26483a23e96","target":"record","created_at":"2026-07-05T03:40:29Z","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":"2f03b1fb2056a5f0dd39511aeb6e48869b1fa85520fc2d2739f401a8101174f2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-12-03T05:24:17Z","title_canon_sha256":"b28af547da32f7f881dd4d4a6f619ff8d9c6870c35f640fc45d19aaec4482906"},"schema_version":"1.0","source":{"id":"2012.01709","kind":"arxiv","version":1}},"canonical_sha256":"7fcd8f87d1135339b262b6821d6e58bd5c475a051062fcf439da98291f8e920f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fcd8f87d1135339b262b6821d6e58bd5c475a051062fcf439da98291f8e920f","first_computed_at":"2026-07-05T03:40:29.279333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:40:29.279333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rnott5oaMnZU/sF8UPAEKf9xxyVQuivECCE64gTV5JkSlQDoK313uZpUvFFgUX1mivEr+X7WXU71pBFv2DGjDA==","signature_status":"signed_v1","signed_at":"2026-07-05T03:40:29.279907Z","signed_message":"canonical_sha256_bytes"},"source_id":"2012.01709","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2418481f0f9b0f6fa294b65a7357ee3152edc257931d3ae1bf07b26483a23e96","sha256:6d5b4ea16494aae0d85e107f43378992747a49020ea8a1c53365976f7edcfb25"],"state_sha256":"96aa4437e2637c239e6d9282c4e2e3c5231688b25da561096a837ca71acb9c87"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DhOClGEsCcKehZTHrPEtucMl/S9y1ZnCfBGMO0n2X9oN3oc1U+8YbaVKIi1l0UGJc8TQvZHJW2QA/H3ZDb9aCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:05:15.311269Z","bundle_sha256":"b498b723c8565a2ed7ff4493c3a4eb9d95bf1be136938ca85258d7210a632092"}}