{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:4TBQCG33WQ6Q6ETC6QHR5ESCSK","short_pith_number":"pith:4TBQCG33","canonical_record":{"source":{"id":"1201.6289","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-01-30T17:23:03Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"3269ec6ef93deb90833bea4d5927bed89fee61285b118ce41fce1a70723243ed","abstract_canon_sha256":"11b2eeb40e179203260c62d2249c41ee2445f5f306632ac38b07b9e1e0260b08"},"schema_version":"1.0"},"canonical_sha256":"e4c3011b7bb43d0f1262f40f1e924292aee7914f14e0584726df2c0f41da2cb8","source":{"kind":"arxiv","id":"1201.6289","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.6289","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"arxiv_version","alias_value":"1201.6289v1","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6289","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"pith_short_12","alias_value":"4TBQCG33WQ6Q","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4TBQCG33WQ6Q6ETC","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4TBQCG33","created_at":"2026-05-18T12:26:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:4TBQCG33WQ6Q6ETC6QHR5ESCSK","target":"record","payload":{"canonical_record":{"source":{"id":"1201.6289","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-01-30T17:23:03Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"3269ec6ef93deb90833bea4d5927bed89fee61285b118ce41fce1a70723243ed","abstract_canon_sha256":"11b2eeb40e179203260c62d2249c41ee2445f5f306632ac38b07b9e1e0260b08"},"schema_version":"1.0"},"canonical_sha256":"e4c3011b7bb43d0f1262f40f1e924292aee7914f14e0584726df2c0f41da2cb8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:02:24.786633Z","signature_b64":"qfeQ6o5jt5uNkJgcfnKhksoSM6wr1S5e5ONUgpKdgdYNqqpXvWTui5uuF1TVNxOHqiAsaELZt+SBtEWTZHHWCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e4c3011b7bb43d0f1262f40f1e924292aee7914f14e0584726df2c0f41da2cb8","last_reissued_at":"2026-05-18T04:02:24.786080Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:02:24.786080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.6289","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":"2026-05-18T04:02:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p3/CYXBzLEgZ/4mJKKtqGUhpZazH1OxTi6zTAbLvYiN1GnjlhQlUua8p9qzcPO5363b7DfHvE5CFTzIx2TRoAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:27:20.376917Z"},"content_sha256":"1a2caf890658c85b117acdf94c5f3e348513164d1d9e900ca2a35b2985ee90e9","schema_version":"1.0","event_id":"sha256:1a2caf890658c85b117acdf94c5f3e348513164d1d9e900ca2a35b2985ee90e9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:4TBQCG33WQ6Q6ETC6QHR5ESCSK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Code-division multiplexing for x-ray microcalorimeters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"physics.ins-det","authors_text":"C. D. Reintsema, D. R. Schmidt, D. S. Swetz, G. C. Hilton, G. M. Stiehl, J. N. Ullom, J. W. Fowler, K. D. Irwin, L. R. Vale. (US National Institute of Standards, Technology), W. B. Doriese","submitted_at":"2012-01-30T17:23:03Z","abstract_excerpt":"We demonstrate the code-division multiplexed (CDM) readout of eight transition-edge sensor microcalorimeters. The energy resolution is 3.0 eV (full width at half-maximum) or better at 5.9 keV, with a best resolution of 2.3 eV and a mean of 2.6 eV over the seven modulated detectors. The flux-summing CDM system is described and compared with similar time-division multiplexed (TDM) readout. We show that the sqrt(Npixels) multiplexing disadvantage associated with TDM is not present in CDM. This demonstration establishes CDM as both a simple route to higher performance in existing TDM microcalorime"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6289","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":"2026-05-18T04:02:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YVFtvCkYcANv+Dgvfzr2afjQ9+t581FPeyRKU8/KrSczbiCSJQYH2IREoFqomeeMW/Izx+Rq/uQPze2y5AVEBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T12:27:20.377267Z"},"content_sha256":"63344e68e70f37c2a2129a107b4d5f254101a09114dc33b7da18dd614d425cfe","schema_version":"1.0","event_id":"sha256:63344e68e70f37c2a2129a107b4d5f254101a09114dc33b7da18dd614d425cfe"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/bundle.json","state_url":"https://pith.science/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/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":"2026-05-30T12:27:20Z","links":{"resolver":"https://pith.science/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK","bundle":"https://pith.science/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/bundle.json","state":"https://pith.science/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4TBQCG33WQ6Q6ETC6QHR5ESCSK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:4TBQCG33WQ6Q6ETC6QHR5ESCSK","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":"11b2eeb40e179203260c62d2249c41ee2445f5f306632ac38b07b9e1e0260b08","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-01-30T17:23:03Z","title_canon_sha256":"3269ec6ef93deb90833bea4d5927bed89fee61285b118ce41fce1a70723243ed"},"schema_version":"1.0","source":{"id":"1201.6289","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.6289","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"arxiv_version","alias_value":"1201.6289v1","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.6289","created_at":"2026-05-18T04:02:24Z"},{"alias_kind":"pith_short_12","alias_value":"4TBQCG33WQ6Q","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_16","alias_value":"4TBQCG33WQ6Q6ETC","created_at":"2026-05-18T12:26:53Z"},{"alias_kind":"pith_short_8","alias_value":"4TBQCG33","created_at":"2026-05-18T12:26:53Z"}],"graph_snapshots":[{"event_id":"sha256:63344e68e70f37c2a2129a107b4d5f254101a09114dc33b7da18dd614d425cfe","target":"graph","created_at":"2026-05-18T04:02:24Z","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 the code-division multiplexed (CDM) readout of eight transition-edge sensor microcalorimeters. The energy resolution is 3.0 eV (full width at half-maximum) or better at 5.9 keV, with a best resolution of 2.3 eV and a mean of 2.6 eV over the seven modulated detectors. The flux-summing CDM system is described and compared with similar time-division multiplexed (TDM) readout. We show that the sqrt(Npixels) multiplexing disadvantage associated with TDM is not present in CDM. This demonstration establishes CDM as both a simple route to higher performance in existing TDM microcalorime","authors_text":"C. D. Reintsema, D. R. Schmidt, D. S. Swetz, G. C. Hilton, G. M. Stiehl, J. N. Ullom, J. W. Fowler, K. D. Irwin, L. R. Vale. (US National Institute of Standards, Technology), W. B. Doriese","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-01-30T17:23:03Z","title":"Code-division multiplexing for x-ray microcalorimeters"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.6289","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":"sha256:1a2caf890658c85b117acdf94c5f3e348513164d1d9e900ca2a35b2985ee90e9","target":"record","created_at":"2026-05-18T04:02:24Z","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":"11b2eeb40e179203260c62d2249c41ee2445f5f306632ac38b07b9e1e0260b08","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2012-01-30T17:23:03Z","title_canon_sha256":"3269ec6ef93deb90833bea4d5927bed89fee61285b118ce41fce1a70723243ed"},"schema_version":"1.0","source":{"id":"1201.6289","kind":"arxiv","version":1}},"canonical_sha256":"e4c3011b7bb43d0f1262f40f1e924292aee7914f14e0584726df2c0f41da2cb8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e4c3011b7bb43d0f1262f40f1e924292aee7914f14e0584726df2c0f41da2cb8","first_computed_at":"2026-05-18T04:02:24.786080Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:02:24.786080Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qfeQ6o5jt5uNkJgcfnKhksoSM6wr1S5e5ONUgpKdgdYNqqpXvWTui5uuF1TVNxOHqiAsaELZt+SBtEWTZHHWCA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:02:24.786633Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.6289","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1a2caf890658c85b117acdf94c5f3e348513164d1d9e900ca2a35b2985ee90e9","sha256:63344e68e70f37c2a2129a107b4d5f254101a09114dc33b7da18dd614d425cfe"],"state_sha256":"4beb4f84f73a076eead783e11fe5ccf562482e68c5e24686692c42285ad6c095"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lecNCy7eXhX0GC7OOZIMrp01B01nSDq+Ss5NkaZiB4hDJt7J7kw+cX+/V+pfPOsEN29R9Yq+nBlnJ4PPla6fAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T12:27:20.379262Z","bundle_sha256":"7a24a99fd29c6f25777d4e138ea8f6cddb83f0dcbc84ad0cf58272379b38b38e"}}