{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:HBHR6MEJRG2MOIGZPW37REYCHC","short_pith_number":"pith:HBHR6MEJ","canonical_record":{"source":{"id":"2310.05608","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-10-09T10:50:44Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"5325ae16827c1f5e6bd4f950a5823de5d4cda552bba5df2cb15a2da5263c2c3a","abstract_canon_sha256":"741b58407182079dffefd93dc39829c444aab424109269e9bf15191d8d9d7805"},"schema_version":"1.0"},"canonical_sha256":"384f1f308989b4c720d97db7f89302389c312dfe512f6cc98a98b15ec7fbd99c","source":{"kind":"arxiv","id":"2310.05608","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.05608","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"arxiv_version","alias_value":"2310.05608v2","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.05608","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_12","alias_value":"HBHR6MEJRG2M","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_16","alias_value":"HBHR6MEJRG2MOIGZ","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_8","alias_value":"HBHR6MEJ","created_at":"2026-07-05T07:24:55Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:HBHR6MEJRG2MOIGZPW37REYCHC","target":"record","payload":{"canonical_record":{"source":{"id":"2310.05608","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-10-09T10:50:44Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"5325ae16827c1f5e6bd4f950a5823de5d4cda552bba5df2cb15a2da5263c2c3a","abstract_canon_sha256":"741b58407182079dffefd93dc39829c444aab424109269e9bf15191d8d9d7805"},"schema_version":"1.0"},"canonical_sha256":"384f1f308989b4c720d97db7f89302389c312dfe512f6cc98a98b15ec7fbd99c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:24:55.341073Z","signature_b64":"3cs9epQ8H3Mr6HY4VVcTerpU8zn77t15Snx5+gm0LZRcLCsZeG08f+qP/iVHZ45Mg9h8e384mE20YwXPMsGWAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"384f1f308989b4c720d97db7f89302389c312dfe512f6cc98a98b15ec7fbd99c","last_reissued_at":"2026-07-05T07:24:55.340560Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:24:55.340560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2310.05608","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":"2026-07-05T07:24:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CTmsdpDcQpU2GGS3UxvlJrAGicTJJ+cV1i2aTNyFZX5d7aCHXuDFd2aFgSxoUoKKheo+qiepJILe2Domw72UBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T19:30:51.067049Z"},"content_sha256":"5b71aae61cffcdec91280de2362c01bd212e1f38de56a9dc1294ef1d072d6ae4","schema_version":"1.0","event_id":"sha256:5b71aae61cffcdec91280de2362c01bd212e1f38de56a9dc1294ef1d072d6ae4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:HBHR6MEJRG2MOIGZPW37REYCHC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"Anastasia Fialkov, Filippo Pagani, Henry Linton, Leiv R{\\o}nneberg, Stefan Heimersheim","submitted_at":"2023-10-09T10:50:44Z","abstract_excerpt":"The cosmological 21 cm signal is one of the most promising avenues to study the Epoch of Reionization. One class of experiments aiming to detect this signal is global signal experiments measuring the sky-averaged 21 cm brightness temperature as a function of frequency. A crucial step in the interpretation and analysis of such measurements is separating foreground contributions from the remainder of the signal, requiring accurate models for both components. Current models for the signal (non-foreground) component, which may contain cosmological and systematic contributions, are incomplete and u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.05608","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2310.05608/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T07:24:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5uanZ3a5yGfZpcFXhHM2CsWpH8cwwIrPI4tf48HqDxOUQcwoH1rO4R0s/vm2CVXIzVJuq410CDESTcQWoNWTDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-18T19:30:51.067435Z"},"content_sha256":"7ae3e7926aeab42613af0f61e570e9dbd96ea2725a575397f94b84cd0274b909","schema_version":"1.0","event_id":"sha256:7ae3e7926aeab42613af0f61e570e9dbd96ea2725a575397f94b84cd0274b909"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HBHR6MEJRG2MOIGZPW37REYCHC/bundle.json","state_url":"https://pith.science/pith/HBHR6MEJRG2MOIGZPW37REYCHC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HBHR6MEJRG2MOIGZPW37REYCHC/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":"2026-07-18T19:30:51Z","links":{"resolver":"https://pith.science/pith/HBHR6MEJRG2MOIGZPW37REYCHC","bundle":"https://pith.science/pith/HBHR6MEJRG2MOIGZPW37REYCHC/bundle.json","state":"https://pith.science/pith/HBHR6MEJRG2MOIGZPW37REYCHC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HBHR6MEJRG2MOIGZPW37REYCHC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:HBHR6MEJRG2MOIGZPW37REYCHC","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":"741b58407182079dffefd93dc39829c444aab424109269e9bf15191d8d9d7805","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-10-09T10:50:44Z","title_canon_sha256":"5325ae16827c1f5e6bd4f950a5823de5d4cda552bba5df2cb15a2da5263c2c3a"},"schema_version":"1.0","source":{"id":"2310.05608","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2310.05608","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"arxiv_version","alias_value":"2310.05608v2","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.05608","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_12","alias_value":"HBHR6MEJRG2M","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_16","alias_value":"HBHR6MEJRG2MOIGZ","created_at":"2026-07-05T07:24:55Z"},{"alias_kind":"pith_short_8","alias_value":"HBHR6MEJ","created_at":"2026-07-05T07:24:55Z"}],"graph_snapshots":[{"event_id":"sha256:7ae3e7926aeab42613af0f61e570e9dbd96ea2725a575397f94b84cd0274b909","target":"graph","created_at":"2026-07-05T07:24:55Z","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/2310.05608/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The cosmological 21 cm signal is one of the most promising avenues to study the Epoch of Reionization. One class of experiments aiming to detect this signal is global signal experiments measuring the sky-averaged 21 cm brightness temperature as a function of frequency. A crucial step in the interpretation and analysis of such measurements is separating foreground contributions from the remainder of the signal, requiring accurate models for both components. Current models for the signal (non-foreground) component, which may contain cosmological and systematic contributions, are incomplete and u","authors_text":"Anastasia Fialkov, Filippo Pagani, Henry Linton, Leiv R{\\o}nneberg, Stefan Heimersheim","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-10-09T10:50:44Z","title":"FlexKnot and Gaussian Process for 21 cm global signal analysis and foreground separation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.05608","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":"sha256:5b71aae61cffcdec91280de2362c01bd212e1f38de56a9dc1294ef1d072d6ae4","target":"record","created_at":"2026-07-05T07:24:55Z","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":"741b58407182079dffefd93dc39829c444aab424109269e9bf15191d8d9d7805","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2023-10-09T10:50:44Z","title_canon_sha256":"5325ae16827c1f5e6bd4f950a5823de5d4cda552bba5df2cb15a2da5263c2c3a"},"schema_version":"1.0","source":{"id":"2310.05608","kind":"arxiv","version":2}},"canonical_sha256":"384f1f308989b4c720d97db7f89302389c312dfe512f6cc98a98b15ec7fbd99c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"384f1f308989b4c720d97db7f89302389c312dfe512f6cc98a98b15ec7fbd99c","first_computed_at":"2026-07-05T07:24:55.340560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T07:24:55.340560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3cs9epQ8H3Mr6HY4VVcTerpU8zn77t15Snx5+gm0LZRcLCsZeG08f+qP/iVHZ45Mg9h8e384mE20YwXPMsGWAg==","signature_status":"signed_v1","signed_at":"2026-07-05T07:24:55.341073Z","signed_message":"canonical_sha256_bytes"},"source_id":"2310.05608","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5b71aae61cffcdec91280de2362c01bd212e1f38de56a9dc1294ef1d072d6ae4","sha256:7ae3e7926aeab42613af0f61e570e9dbd96ea2725a575397f94b84cd0274b909"],"state_sha256":"f592b0a97db15b24b2cf7e3de461d59585c5e86df4e50fa59f8b5ef6d7fe6693"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LAcAW6Drm+MWjZ6HWDf08YKLVglt9a77IGm1NaTU1MsxifRZXOxN9/G+bVLVt2jkvfSdvYB+2zdIwWfHkpw9Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-18T19:30:51.069839Z","bundle_sha256":"747e1e6a74f595193427d27dbc15e872603fbc734db19e7af23a56e264bfd8a3"}}