{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:QMEWYHOOZKE67D3XWXCXPC6EVO","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":"72c29af0b588ef8d4c2db835c56d2d44fe76024c2232097d3151ef2bf4ff2a2b","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-06-10T18:00:00Z","title_canon_sha256":"9804fbe8dfe43bdf2fd29e8024ad2997c16914be924bb681a34424c70aaac57d"},"schema_version":"1.0","source":{"id":"2006.05996","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2006.05996","created_at":"2026-07-05T01:39:00Z"},{"alias_kind":"arxiv_version","alias_value":"2006.05996v2","created_at":"2026-07-05T01:39:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2006.05996","created_at":"2026-07-05T01:39:00Z"},{"alias_kind":"pith_short_12","alias_value":"QMEWYHOOZKE6","created_at":"2026-07-05T01:39:00Z"},{"alias_kind":"pith_short_16","alias_value":"QMEWYHOOZKE67D3X","created_at":"2026-07-05T01:39:00Z"},{"alias_kind":"pith_short_8","alias_value":"QMEWYHOO","created_at":"2026-07-05T01:39:00Z"}],"graph_snapshots":[{"event_id":"sha256:46abc536a32d34a4119a4789f297d8fc96d277068644ba25cf21055b639eb02c","target":"graph","created_at":"2026-07-05T01:39:00Z","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/2006.05996/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"21 cm intensity mapping has emerged as a promising technique to map the large-scale structure of the Universe. However, the presence of foregrounds with amplitudes orders of magnitude larger than the cosmological signal constitutes a critical challenge. Here, we test the sparsity-based algorithm Generalised Morphological Component Analysis (GMCA) as a blind component separation technique for this class of experiments. We test the GMCA performance against realistic full-sky mock temperature maps that include, besides astrophysical foregrounds, also a fraction of the polarized part of the signal","authors_text":"Isabella P. Carucci, J\\'er\\^ome Bobin, Melis O. Irfan","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-06-10T18:00:00Z","title":"Recovery of 21 cm intensity maps with sparse component separation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2006.05996","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":"sha256:29d05866b3f339bffbf49cc69bf59fb10224f96f159c7038a97d07e06b241785","target":"record","created_at":"2026-07-05T01:39:00Z","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":"72c29af0b588ef8d4c2db835c56d2d44fe76024c2232097d3151ef2bf4ff2a2b","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2020-06-10T18:00:00Z","title_canon_sha256":"9804fbe8dfe43bdf2fd29e8024ad2997c16914be924bb681a34424c70aaac57d"},"schema_version":"1.0","source":{"id":"2006.05996","kind":"arxiv","version":2}},"canonical_sha256":"83096c1dceca89ef8f77b5c5778bc4ab9523615bf63d4170d471c6e6cf104219","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"83096c1dceca89ef8f77b5c5778bc4ab9523615bf63d4170d471c6e6cf104219","first_computed_at":"2026-07-05T01:39:00.793039Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:39:00.793039Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gBCTShTyxTnOdfsoUIn/QQOdWSkkVbcB2dNadqZJB66sJeC1xYqKSC0Lmv2lQo2GTgVFxLt1gHZBsyYPhicaAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:39:00.793448Z","signed_message":"canonical_sha256_bytes"},"source_id":"2006.05996","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:29d05866b3f339bffbf49cc69bf59fb10224f96f159c7038a97d07e06b241785","sha256:46abc536a32d34a4119a4789f297d8fc96d277068644ba25cf21055b639eb02c"],"state_sha256":"77e27fdcb91f10cf1b2513ef6821a7e5cf11662debe8561197bd2d6531ec2878"}