{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:FJNWFU4CWANXRDL25YDC4LEZKG","short_pith_number":"pith:FJNWFU4C","schema_version":"1.0","canonical_sha256":"2a5b62d382b01b788d7aee062e2c9951a21fd9ae697bc4db5607ef07ff0f2714","source":{"kind":"arxiv","id":"2502.05188","version":1},"attestation_state":"computed","paper":{"title":"The Cosmic Microwave Background: Spectral Distortions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Jens Chluba","submitted_at":"2025-01-26T11:50:41Z","abstract_excerpt":"The cosmic microwave background (CMB) traveled the cosmos long before it reached our telescopes today. Consequently, it is one of the best probes of fundamental processes in the early Universe that we could hope to observe. The cosmological information is encoded in two distinct ways. First, we can investigate how the CMB photons in one sky-direction are distributed across energy by focusing on information carried by the CMB frequency spectrum. Second, we can compare the flux of CMB photons that we receive from different directions, this time at a fixed frequency, to study the CMB anisotropies"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2502.05188","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2025-01-26T11:50:41Z","cross_cats_sorted":["hep-th"],"title_canon_sha256":"240d95bacefbd677262de2bc135c29947c1107d43a6ec4f2d1e544ad3d14b164","abstract_canon_sha256":"6776b8ac968c46e940412411960b5fb4f033918d9613594f6d8b406ab6904624"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:11:33.804548Z","signature_b64":"N+vgE4zwFFW1ibHyrItGZ2ZVJd7H7ryBCxqGe/XgHGt+4zu1vigRskWITL+5xsP3jTWSkv8XBUQnoMpX3ep+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a5b62d382b01b788d7aee062e2c9951a21fd9ae697bc4db5607ef07ff0f2714","last_reissued_at":"2026-07-05T10:11:33.804042Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:11:33.804042Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The Cosmic Microwave Background: Spectral Distortions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-th"],"primary_cat":"astro-ph.CO","authors_text":"Jens Chluba","submitted_at":"2025-01-26T11:50:41Z","abstract_excerpt":"The cosmic microwave background (CMB) traveled the cosmos long before it reached our telescopes today. Consequently, it is one of the best probes of fundamental processes in the early Universe that we could hope to observe. The cosmological information is encoded in two distinct ways. First, we can investigate how the CMB photons in one sky-direction are distributed across energy by focusing on information carried by the CMB frequency spectrum. Second, we can compare the flux of CMB photons that we receive from different directions, this time at a fixed frequency, to study the CMB anisotropies"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.05188","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2502.05188/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2502.05188","created_at":"2026-07-05T10:11:33.804110+00:00"},{"alias_kind":"arxiv_version","alias_value":"2502.05188v1","created_at":"2026-07-05T10:11:33.804110+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.05188","created_at":"2026-07-05T10:11:33.804110+00:00"},{"alias_kind":"pith_short_12","alias_value":"FJNWFU4CWANX","created_at":"2026-07-05T10:11:33.804110+00:00"},{"alias_kind":"pith_short_16","alias_value":"FJNWFU4CWANXRDL2","created_at":"2026-07-05T10:11:33.804110+00:00"},{"alias_kind":"pith_short_8","alias_value":"FJNWFU4C","created_at":"2026-07-05T10:11:33.804110+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":0,"sample":[{"citing_arxiv_id":"2510.22592","citing_title":"Probing Axion-Photon conversion via circular polarization imprints in the CMB $V$-mode observations","ref_index":45,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG","json":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG.json","graph_json":"https://pith.science/api/pith-number/FJNWFU4CWANXRDL25YDC4LEZKG/graph.json","events_json":"https://pith.science/api/pith-number/FJNWFU4CWANXRDL25YDC4LEZKG/events.json","paper":"https://pith.science/paper/FJNWFU4C"},"agent_actions":{"view_html":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG","download_json":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG.json","view_paper":"https://pith.science/paper/FJNWFU4C","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2502.05188&json=true","fetch_graph":"https://pith.science/api/pith-number/FJNWFU4CWANXRDL25YDC4LEZKG/graph.json","fetch_events":"https://pith.science/api/pith-number/FJNWFU4CWANXRDL25YDC4LEZKG/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG/action/storage_attestation","attest_author":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG/action/author_attestation","sign_citation":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG/action/citation_signature","submit_replication":"https://pith.science/pith/FJNWFU4CWANXRDL25YDC4LEZKG/action/replication_record"}},"created_at":"2026-07-05T10:11:33.804110+00:00","updated_at":"2026-07-05T10:11:33.804110+00:00"}