{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:P7BFSB3RRQI6PRT5VJVZAVJKY3","short_pith_number":"pith:P7BFSB3R","canonical_record":{"source":{"id":"1402.1223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-02-06T01:16:31Z","cross_cats_sorted":[],"title_canon_sha256":"37181742e430c990c9dc6e26d169ef0c410780942998184ae87443f26b766d9a","abstract_canon_sha256":"48576c327e506c4117d760ce6d00b1dbfd1107d377ee9a5c02a748af722abbfe"},"schema_version":"1.0"},"canonical_sha256":"7fc25907718c11e7c67daa6b90552ac6e083b500da1ea83f7f230d62acdc9421","source":{"kind":"arxiv","id":"1402.1223","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1223","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1223v1","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1223","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"pith_short_12","alias_value":"P7BFSB3RRQI6","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7BFSB3RRQI6PRT5","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7BFSB3R","created_at":"2026-05-18T12:28:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:P7BFSB3RRQI6PRT5VJVZAVJKY3","target":"record","payload":{"canonical_record":{"source":{"id":"1402.1223","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-02-06T01:16:31Z","cross_cats_sorted":[],"title_canon_sha256":"37181742e430c990c9dc6e26d169ef0c410780942998184ae87443f26b766d9a","abstract_canon_sha256":"48576c327e506c4117d760ce6d00b1dbfd1107d377ee9a5c02a748af722abbfe"},"schema_version":"1.0"},"canonical_sha256":"7fc25907718c11e7c67daa6b90552ac6e083b500da1ea83f7f230d62acdc9421","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:58:41.703722Z","signature_b64":"LZgJ9Wp6EVJwqUj6aw2ZeJ3TS+YLwDe/mgzN8Bl43sF3eaRVZuIiwGDxlcJQyaR3s3XIE0DLe2JEmFYw3ozjBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7fc25907718c11e7c67daa6b90552ac6e083b500da1ea83f7f230d62acdc9421","last_reissued_at":"2026-05-18T00:58:41.703046Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:58:41.703046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1402.1223","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":"2026-05-18T00:58:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uYrcVkf52vK/kAXoDNNvgyGP1G1vcxrTLGx80G/O7eUdjDrfVyIBc9wekaWzfQelVx4MAKR3NyRlnFscBtgVBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:50:03.459272Z"},"content_sha256":"e6c589fcdc112a6d174f3e26bc840eb781eeaa21d3254d91565f9bedd5401993","schema_version":"1.0","event_id":"sha256:e6c589fcdc112a6d174f3e26bc840eb781eeaa21d3254d91565f9bedd5401993"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:P7BFSB3RRQI6PRT5VJVZAVJKY3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Performance of the Caltech Submillimeter Observatory Dual-Color 180-720 GHz Balanced SIS Receivers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Kovacs, B. Bumble, B. Force, D. Lis, D. Miller, F. Rice, H. Yoshida, J. A. Stern, J. W. Kooi, K. Cooper, M. Gould, R. A. Chamberlin, R. LeDuc, R. Monje, T. G. Phillips","submitted_at":"2014-02-06T01:16:31Z","abstract_excerpt":"We report on balanced SIS receivers covering the astronomical important 180-720 GHz submillimeter atmospheric window. To facilitate remote observations and automated spectral line surveys, fully synthesized local oscillators are employed. High-current-density Nb-AlN-Nb superconducting-insulating-superconducting (SIS) tunnel junctions are used as the mixing element. The measured double-sideband (DSB) 230 GHz receiver noise temperature, uncorrected for optics loss, ranges from 50K at 185 GHz, 33K at 246 GHz, to 51K at 280 GHz. In this frequency range the mixer has a DSB conversion gain of 0 +- 1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1223","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":"2026-05-18T00:58:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"onJNxidd/0J+9o6wyBHzg5gq3scnKz/DjQNzgAk82R89IV4ULgxUJVZrNLXIiXp1lWWWZyFEj4QE+nJlFYiFAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T15:50:03.459974Z"},"content_sha256":"07cf88c882f541070a68d63644260eb18e14050028e0831437b99d11fd43425a","schema_version":"1.0","event_id":"sha256:07cf88c882f541070a68d63644260eb18e14050028e0831437b99d11fd43425a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/bundle.json","state_url":"https://pith.science/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/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":"2026-05-24T15:50:03Z","links":{"resolver":"https://pith.science/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3","bundle":"https://pith.science/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/bundle.json","state":"https://pith.science/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/P7BFSB3RRQI6PRT5VJVZAVJKY3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:P7BFSB3RRQI6PRT5VJVZAVJKY3","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":"48576c327e506c4117d760ce6d00b1dbfd1107d377ee9a5c02a748af722abbfe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-02-06T01:16:31Z","title_canon_sha256":"37181742e430c990c9dc6e26d169ef0c410780942998184ae87443f26b766d9a"},"schema_version":"1.0","source":{"id":"1402.1223","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1402.1223","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"arxiv_version","alias_value":"1402.1223v1","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1402.1223","created_at":"2026-05-18T00:58:41Z"},{"alias_kind":"pith_short_12","alias_value":"P7BFSB3RRQI6","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_16","alias_value":"P7BFSB3RRQI6PRT5","created_at":"2026-05-18T12:28:43Z"},{"alias_kind":"pith_short_8","alias_value":"P7BFSB3R","created_at":"2026-05-18T12:28:43Z"}],"graph_snapshots":[{"event_id":"sha256:07cf88c882f541070a68d63644260eb18e14050028e0831437b99d11fd43425a","target":"graph","created_at":"2026-05-18T00:58:41Z","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 report on balanced SIS receivers covering the astronomical important 180-720 GHz submillimeter atmospheric window. To facilitate remote observations and automated spectral line surveys, fully synthesized local oscillators are employed. High-current-density Nb-AlN-Nb superconducting-insulating-superconducting (SIS) tunnel junctions are used as the mixing element. The measured double-sideband (DSB) 230 GHz receiver noise temperature, uncorrected for optics loss, ranges from 50K at 185 GHz, 33K at 246 GHz, to 51K at 280 GHz. In this frequency range the mixer has a DSB conversion gain of 0 +- 1","authors_text":"A. Kovacs, B. Bumble, B. Force, D. Lis, D. Miller, F. Rice, H. Yoshida, J. A. Stern, J. W. Kooi, K. Cooper, M. Gould, R. A. Chamberlin, R. LeDuc, R. Monje, T. G. Phillips","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-02-06T01:16:31Z","title":"Performance of the Caltech Submillimeter Observatory Dual-Color 180-720 GHz Balanced SIS Receivers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.1223","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:e6c589fcdc112a6d174f3e26bc840eb781eeaa21d3254d91565f9bedd5401993","target":"record","created_at":"2026-05-18T00:58:41Z","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":"48576c327e506c4117d760ce6d00b1dbfd1107d377ee9a5c02a748af722abbfe","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2014-02-06T01:16:31Z","title_canon_sha256":"37181742e430c990c9dc6e26d169ef0c410780942998184ae87443f26b766d9a"},"schema_version":"1.0","source":{"id":"1402.1223","kind":"arxiv","version":1}},"canonical_sha256":"7fc25907718c11e7c67daa6b90552ac6e083b500da1ea83f7f230d62acdc9421","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7fc25907718c11e7c67daa6b90552ac6e083b500da1ea83f7f230d62acdc9421","first_computed_at":"2026-05-18T00:58:41.703046Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:58:41.703046Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LZgJ9Wp6EVJwqUj6aw2ZeJ3TS+YLwDe/mgzN8Bl43sF3eaRVZuIiwGDxlcJQyaR3s3XIE0DLe2JEmFYw3ozjBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:58:41.703722Z","signed_message":"canonical_sha256_bytes"},"source_id":"1402.1223","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6c589fcdc112a6d174f3e26bc840eb781eeaa21d3254d91565f9bedd5401993","sha256:07cf88c882f541070a68d63644260eb18e14050028e0831437b99d11fd43425a"],"state_sha256":"9867e31f2ca3df1c184802ecb024e9f5cbf29a1b49b854a58835fd019eb89377"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tlmppFOQ7PwizFr0hgZL5M/tkijXTJ8kabzm7OK6LWn7ePUfRk32nZqKg777ManyZ3+V5q5ZyqbXBciFhLEfDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T15:50:03.463782Z","bundle_sha256":"56ca3725acedae8211c921d721315ab3496eedd6a2bdd2e37a3af07efbb9204b"}}