{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:IFN7YYIH6LUQVUGTKCCYIHQU2K","short_pith_number":"pith:IFN7YYIH","canonical_record":{"source":{"id":"1508.00747","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-04T12:23:19Z","cross_cats_sorted":[],"title_canon_sha256":"f388d141a295744b2483effc05907b8fc2a1b163117c93bdb726c921d11dea5e","abstract_canon_sha256":"ca907ecab3fd4ea438c176a8efd09459ae60a79b66f5fd7d53cf7c814e865034"},"schema_version":"1.0"},"canonical_sha256":"415bfc6107f2e90ad0d35085841e14d2ad523046755dd36feec3f0bfa01cd27d","source":{"kind":"arxiv","id":"1508.00747","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00747","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00747v2","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00747","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"pith_short_12","alias_value":"IFN7YYIH6LUQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IFN7YYIH6LUQVUGT","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IFN7YYIH","created_at":"2026-05-18T12:29:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:IFN7YYIH6LUQVUGTKCCYIHQU2K","target":"record","payload":{"canonical_record":{"source":{"id":"1508.00747","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-04T12:23:19Z","cross_cats_sorted":[],"title_canon_sha256":"f388d141a295744b2483effc05907b8fc2a1b163117c93bdb726c921d11dea5e","abstract_canon_sha256":"ca907ecab3fd4ea438c176a8efd09459ae60a79b66f5fd7d53cf7c814e865034"},"schema_version":"1.0"},"canonical_sha256":"415bfc6107f2e90ad0d35085841e14d2ad523046755dd36feec3f0bfa01cd27d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:35.777607Z","signature_b64":"1qhRKsXPTHBPMVyMenanxLyHONH1TnZBYl9jQCnXsC5DblQtNMCLFfvzoPnUoG/d0OTeefeRtGmmBsv7tMQzDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"415bfc6107f2e90ad0d35085841e14d2ad523046755dd36feec3f0bfa01cd27d","last_reissued_at":"2026-05-18T01:08:35.777005Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:35.777005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1508.00747","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":"2026-05-18T01:08:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BdtJzs33rNqC3ZPRLtDdF7paQxaC5w5tDyydBzYXdq/U+9RvDBruEriYvmxsnH7uTH8gdXSaCtlXENzauYyYDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:34:41.532475Z"},"content_sha256":"ecf2f2fc3db44bc992dbca00a35a1453d7ee8d2e20055be988452019a20a17b4","schema_version":"1.0","event_id":"sha256:ecf2f2fc3db44bc992dbca00a35a1453d7ee8d2e20055be988452019a20a17b4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:IFN7YYIH6LUQVUGTKCCYIHQU2K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First polarised light with the NIKA camera","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"A. Adane, A. Beelen, A. Beno\\^it, A. Bideaud, A. Catalano, A. D'Addabbo, A. Maury, A. Monfardini, A. Ritacco, A. Sievers, B. Belier, B. Comis, C. Kramer, C. Thum, C. Tucker, E. Pascale, F. Mayet, F. Pajot, F.-X. D\\'esert, G. Coiffard, G. Pisano, G. Savini, J.F. Mac\\'ias-P\\'erez, J. Goupy, J. Martino, K. Schuster, L. Perotto, L. Rodriguez, M. Calvo, M. Rebolo-Iglesias, N. Billot, N. Ponthieu, O. Bourrion, P. Ade, P. Andr\\'e, P. Mauskopf, R. Adam, R. Zylka, S. Doyle, S. Leclercq, S. Triqueneaux, V. R\\'everet","submitted_at":"2015-08-04T12:23:19Z","abstract_excerpt":"NIKA is a dual-band camera operating with 315 frequency multiplexed LEKIDs cooled at 100 mK. NIKA is designed to observe the sky in intensity and polarisation at 150 and 260 GHz from the IRAM 30-m telescope. It is a test-bench for the final NIKA2 camera. The incoming linear polarisation is modulated at four times the mechanical rotation frequency by a warm rotating multi-layer Half Wave Plate. Then, the signal is analysed by a wire grid and finally absorbed by the LEKIDs. The small time constant (< 1ms ) of the LEKID detectors combined with the modulation of the HWP enables the quasi-simultane"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00747","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":"2026-05-18T01:08:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iWf4MEfZj3PMD4JeL5gTg5bijVQa8fnMGpjNOzV5ZOPxsdQhYTELlxMV4BuPhoWlz6tqweAZU9QRfyb2vtOyCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T20:34:41.533093Z"},"content_sha256":"037e851bdb8161ab9cccc7a9623df7a596f58595a2e18e396c4432ab3278ae8d","schema_version":"1.0","event_id":"sha256:037e851bdb8161ab9cccc7a9623df7a596f58595a2e18e396c4432ab3278ae8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/bundle.json","state_url":"https://pith.science/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/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":"2026-06-05T20:34:41Z","links":{"resolver":"https://pith.science/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K","bundle":"https://pith.science/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/bundle.json","state":"https://pith.science/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/IFN7YYIH6LUQVUGTKCCYIHQU2K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:IFN7YYIH6LUQVUGTKCCYIHQU2K","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":"ca907ecab3fd4ea438c176a8efd09459ae60a79b66f5fd7d53cf7c814e865034","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-04T12:23:19Z","title_canon_sha256":"f388d141a295744b2483effc05907b8fc2a1b163117c93bdb726c921d11dea5e"},"schema_version":"1.0","source":{"id":"1508.00747","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1508.00747","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"arxiv_version","alias_value":"1508.00747v2","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1508.00747","created_at":"2026-05-18T01:08:35Z"},{"alias_kind":"pith_short_12","alias_value":"IFN7YYIH6LUQ","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_16","alias_value":"IFN7YYIH6LUQVUGT","created_at":"2026-05-18T12:29:25Z"},{"alias_kind":"pith_short_8","alias_value":"IFN7YYIH","created_at":"2026-05-18T12:29:25Z"}],"graph_snapshots":[{"event_id":"sha256:037e851bdb8161ab9cccc7a9623df7a596f58595a2e18e396c4432ab3278ae8d","target":"graph","created_at":"2026-05-18T01:08:35Z","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":"NIKA is a dual-band camera operating with 315 frequency multiplexed LEKIDs cooled at 100 mK. NIKA is designed to observe the sky in intensity and polarisation at 150 and 260 GHz from the IRAM 30-m telescope. It is a test-bench for the final NIKA2 camera. The incoming linear polarisation is modulated at four times the mechanical rotation frequency by a warm rotating multi-layer Half Wave Plate. Then, the signal is analysed by a wire grid and finally absorbed by the LEKIDs. The small time constant (< 1ms ) of the LEKID detectors combined with the modulation of the HWP enables the quasi-simultane","authors_text":"A. Adane, A. Beelen, A. Beno\\^it, A. Bideaud, A. Catalano, A. D'Addabbo, A. Maury, A. Monfardini, A. Ritacco, A. Sievers, B. Belier, B. Comis, C. Kramer, C. Thum, C. Tucker, E. Pascale, F. Mayet, F. Pajot, F.-X. D\\'esert, G. Coiffard, G. Pisano, G. Savini, J.F. Mac\\'ias-P\\'erez, J. Goupy, J. Martino, K. Schuster, L. Perotto, L. Rodriguez, M. Calvo, M. Rebolo-Iglesias, N. Billot, N. Ponthieu, O. Bourrion, P. Ade, P. Andr\\'e, P. Mauskopf, R. Adam, R. Zylka, S. Doyle, S. Leclercq, S. Triqueneaux, V. R\\'everet","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-04T12:23:19Z","title":"First polarised light with the NIKA camera"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1508.00747","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:ecf2f2fc3db44bc992dbca00a35a1453d7ee8d2e20055be988452019a20a17b4","target":"record","created_at":"2026-05-18T01:08:35Z","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":"ca907ecab3fd4ea438c176a8efd09459ae60a79b66f5fd7d53cf7c814e865034","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2015-08-04T12:23:19Z","title_canon_sha256":"f388d141a295744b2483effc05907b8fc2a1b163117c93bdb726c921d11dea5e"},"schema_version":"1.0","source":{"id":"1508.00747","kind":"arxiv","version":2}},"canonical_sha256":"415bfc6107f2e90ad0d35085841e14d2ad523046755dd36feec3f0bfa01cd27d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"415bfc6107f2e90ad0d35085841e14d2ad523046755dd36feec3f0bfa01cd27d","first_computed_at":"2026-05-18T01:08:35.777005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:35.777005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1qhRKsXPTHBPMVyMenanxLyHONH1TnZBYl9jQCnXsC5DblQtNMCLFfvzoPnUoG/d0OTeefeRtGmmBsv7tMQzDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:35.777607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1508.00747","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ecf2f2fc3db44bc992dbca00a35a1453d7ee8d2e20055be988452019a20a17b4","sha256:037e851bdb8161ab9cccc7a9623df7a596f58595a2e18e396c4432ab3278ae8d"],"state_sha256":"da4295e52f55757a2b75dd1b78a4a54092a6e1b26343c1562cd2db8ec16c7f7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GDPnB5cKQokcy0ZSV9unVy5AOfr9+D8CiSp4wYD2hHdBFu9w3esfZdWkqKL9yuL6TVogBunUv7UYmJxhydn3Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T20:34:41.536725Z","bundle_sha256":"3c65b051e63141aa569a2e1cce2d08392f0d6d65184705fd63c7763d679773d0"}}