{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JDCTI6DGDZWJPI6PSLRT4WT455","short_pith_number":"pith:JDCTI6DG","canonical_record":{"source":{"id":"1807.01384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-03T22:31:41Z","cross_cats_sorted":[],"title_canon_sha256":"8b42c644bde7947de3f70b311fd8ee2bd72561dbb06ad15af1ab813fbab21899","abstract_canon_sha256":"b40cfb8e5c26441115a15a87c9e31d2ef8d1227adeaf283c6141270603eb20ee"},"schema_version":"1.0"},"canonical_sha256":"48c53478661e6c97a3cf92e33e5a7cef605e73cd2f79a86a4c8b86da1a7d8681","source":{"kind":"arxiv","id":"1807.01384","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01384","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01384v1","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01384","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"pith_short_12","alias_value":"JDCTI6DGDZWJ","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JDCTI6DGDZWJPI6P","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JDCTI6DG","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JDCTI6DGDZWJPI6PSLRT4WT455","target":"record","payload":{"canonical_record":{"source":{"id":"1807.01384","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-03T22:31:41Z","cross_cats_sorted":[],"title_canon_sha256":"8b42c644bde7947de3f70b311fd8ee2bd72561dbb06ad15af1ab813fbab21899","abstract_canon_sha256":"b40cfb8e5c26441115a15a87c9e31d2ef8d1227adeaf283c6141270603eb20ee"},"schema_version":"1.0"},"canonical_sha256":"48c53478661e6c97a3cf92e33e5a7cef605e73cd2f79a86a4c8b86da1a7d8681","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:07:06.401169Z","signature_b64":"HOeaJbYrB4p/YwR3BC7ZWa8l+6jkaf4TxtMylSFUKe+vqb0AcHJfaREs5wCuRkebPvqZ0N8JI7yBWNk0tBypAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48c53478661e6c97a3cf92e33e5a7cef605e73cd2f79a86a4c8b86da1a7d8681","last_reissued_at":"2026-05-18T00:07:06.400406Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:07:06.400406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1807.01384","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":"2026-05-18T00:07:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Y9CpQHhI4u2WenoMInTT9v4Ojb4BavcJLZg7sMgnIpYi8wDnU2gG+GvhhsDknZTtgaqOvdKm3MUSye5prmZdDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:51:19.170304Z"},"content_sha256":"95b616ff5e48a819337982043279d22bf6c0f59603a4c6bae401f8b35240b874","schema_version":"1.0","event_id":"sha256:95b616ff5e48a819337982043279d22bf6c0f59603a4c6bae401f8b35240b874"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JDCTI6DGDZWJPI6PSLRT4WT455","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Low Temperature Detectors for CMB Imaging Arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Bradley Dober, Christopher M. McKenney, Daniel T. Becker, Gene C. Hilton, James A. Beall, Jason E. Austermann, Jeff Van Lanen, Jiansong Gao, Joel N. Ullom, Johannes Hubmayr, Michael R. Vissers, Shannon M. Duff","submitted_at":"2018-07-03T22:31:41Z","abstract_excerpt":"We review advances in low temperature detector (LTD) arrays for Cosmic Microwave Background (CMB) polarization experiments, with a particular emphasis on imaging arrays. We briefly motivate the science case, which has spurred a large number of independent experimental efforts. We describe the challenges associated with CMB polarization measurements and how these challenges impact LTD design. Key aspects of an ideal CMB polarization imaging array are developed and compared to the current state-of-the-art. These aspects include dual-polarization-sensitivity, background-limited detection over a 1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01384","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":"2026-05-18T00:07:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GPMfhR9Y785RMp+HaCdiwefjmsvscugD4atPByVJNqcz+5fNOcRb2xfC+kcc16E3G4XP/ir3GJHuI7t5ZlXvDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T23:51:19.170891Z"},"content_sha256":"cad0886ac5140259c014e52a7970d0dd04bebc5b4fc6ae0d7c1bbac9be3e475a","schema_version":"1.0","event_id":"sha256:cad0886ac5140259c014e52a7970d0dd04bebc5b4fc6ae0d7c1bbac9be3e475a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JDCTI6DGDZWJPI6PSLRT4WT455/bundle.json","state_url":"https://pith.science/pith/JDCTI6DGDZWJPI6PSLRT4WT455/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JDCTI6DGDZWJPI6PSLRT4WT455/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":"2026-05-18T23:51:19Z","links":{"resolver":"https://pith.science/pith/JDCTI6DGDZWJPI6PSLRT4WT455","bundle":"https://pith.science/pith/JDCTI6DGDZWJPI6PSLRT4WT455/bundle.json","state":"https://pith.science/pith/JDCTI6DGDZWJPI6PSLRT4WT455/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JDCTI6DGDZWJPI6PSLRT4WT455/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JDCTI6DGDZWJPI6PSLRT4WT455","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":"b40cfb8e5c26441115a15a87c9e31d2ef8d1227adeaf283c6141270603eb20ee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-03T22:31:41Z","title_canon_sha256":"8b42c644bde7947de3f70b311fd8ee2bd72561dbb06ad15af1ab813fbab21899"},"schema_version":"1.0","source":{"id":"1807.01384","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1807.01384","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"arxiv_version","alias_value":"1807.01384v1","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1807.01384","created_at":"2026-05-18T00:07:06Z"},{"alias_kind":"pith_short_12","alias_value":"JDCTI6DGDZWJ","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JDCTI6DGDZWJPI6P","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JDCTI6DG","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:cad0886ac5140259c014e52a7970d0dd04bebc5b4fc6ae0d7c1bbac9be3e475a","target":"graph","created_at":"2026-05-18T00:07:06Z","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 review advances in low temperature detector (LTD) arrays for Cosmic Microwave Background (CMB) polarization experiments, with a particular emphasis on imaging arrays. We briefly motivate the science case, which has spurred a large number of independent experimental efforts. We describe the challenges associated with CMB polarization measurements and how these challenges impact LTD design. Key aspects of an ideal CMB polarization imaging array are developed and compared to the current state-of-the-art. These aspects include dual-polarization-sensitivity, background-limited detection over a 1","authors_text":"Bradley Dober, Christopher M. McKenney, Daniel T. Becker, Gene C. Hilton, James A. Beall, Jason E. Austermann, Jeff Van Lanen, Jiansong Gao, Joel N. Ullom, Johannes Hubmayr, Michael R. Vissers, Shannon M. Duff","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-03T22:31:41Z","title":"Low Temperature Detectors for CMB Imaging Arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.01384","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":"sha256:95b616ff5e48a819337982043279d22bf6c0f59603a4c6bae401f8b35240b874","target":"record","created_at":"2026-05-18T00:07:06Z","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":"b40cfb8e5c26441115a15a87c9e31d2ef8d1227adeaf283c6141270603eb20ee","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-07-03T22:31:41Z","title_canon_sha256":"8b42c644bde7947de3f70b311fd8ee2bd72561dbb06ad15af1ab813fbab21899"},"schema_version":"1.0","source":{"id":"1807.01384","kind":"arxiv","version":1}},"canonical_sha256":"48c53478661e6c97a3cf92e33e5a7cef605e73cd2f79a86a4c8b86da1a7d8681","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48c53478661e6c97a3cf92e33e5a7cef605e73cd2f79a86a4c8b86da1a7d8681","first_computed_at":"2026-05-18T00:07:06.400406Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:06.400406Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HOeaJbYrB4p/YwR3BC7ZWa8l+6jkaf4TxtMylSFUKe+vqb0AcHJfaREs5wCuRkebPvqZ0N8JI7yBWNk0tBypAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:06.401169Z","signed_message":"canonical_sha256_bytes"},"source_id":"1807.01384","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:95b616ff5e48a819337982043279d22bf6c0f59603a4c6bae401f8b35240b874","sha256:cad0886ac5140259c014e52a7970d0dd04bebc5b4fc6ae0d7c1bbac9be3e475a"],"state_sha256":"6df1197905fcfd4377ae822241869cb93c66e718b50a13275c1bbaedf0fbb2ba"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"08ncypFx19VuwmrqxZm2llVUE07tLD5qZFU/daJiPSRgmJbUhrrG35DMZRdYj8zKxD+xvlBksK+G12bC9n4SAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T23:51:19.173042Z","bundle_sha256":"6456ec0c264339bfb3a6e16da9580702f2db9478b2e3b284fe5163f5c23e3933"}}