{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2004:SBBKSL4WQVB2AUVAJAWQQ56QQY","short_pith_number":"pith:SBBKSL4W","canonical_record":{"source":{"id":"astro-ph/0409569","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-23T18:59:54Z","cross_cats_sorted":[],"title_canon_sha256":"540dcb3088535cc9d5f561709c40391bd4b0ed67b7cbcdc2aa5537647fab3d4d","abstract_canon_sha256":"66f8445ebd7d1b89d0b07167fccb917a51c72a6030ac770c205768935652147f"},"schema_version":"1.0"},"canonical_sha256":"9042a92f968543a052a0482d0877d0861758c2c03711e35fdd22e02c17ef1859","source":{"kind":"arxiv","id":"astro-ph/0409569","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409569","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409569v2","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409569","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_12","alias_value":"SBBKSL4WQVB2","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_16","alias_value":"SBBKSL4WQVB2AUVA","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_8","alias_value":"SBBKSL4W","created_at":"2026-07-04T14:13:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2004:SBBKSL4WQVB2AUVAJAWQQ56QQY","target":"record","payload":{"canonical_record":{"source":{"id":"astro-ph/0409569","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-23T18:59:54Z","cross_cats_sorted":[],"title_canon_sha256":"540dcb3088535cc9d5f561709c40391bd4b0ed67b7cbcdc2aa5537647fab3d4d","abstract_canon_sha256":"66f8445ebd7d1b89d0b07167fccb917a51c72a6030ac770c205768935652147f"},"schema_version":"1.0"},"canonical_sha256":"9042a92f968543a052a0482d0877d0861758c2c03711e35fdd22e02c17ef1859","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:13:46.418279Z","signature_b64":"vYLZQU2O2ufncaJutKxzKEQzxgqxDxwVHNaJWnrMAtBmLa3ACPpu6l+y/gNAHTTST+Fg6GOq9wLI8vcyZLmZDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9042a92f968543a052a0482d0877d0861758c2c03711e35fdd22e02c17ef1859","last_reissued_at":"2026-07-04T14:13:46.417807Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:13:46.417807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"astro-ph/0409569","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":"2026-07-04T14:13:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"piKVZt8LfbaI5KoUz8ZZgUpmzWEKFNkz2pV6dGcxnAwh4D7Syrvrqk5r391E6nv/aqbgCN2mGP89rErLaAQrCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T07:43:31.457775Z"},"content_sha256":"00646cd9c33d97824d19f64bb1c336893591438f630f31134de76d7bcc0d1f78","schema_version":"1.0","event_id":"sha256:00646cd9c33d97824d19f64bb1c336893591438f630f31134de76d7bcc0d1f78"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2004:SBBKSL4WQVB2AUVAJAWQQ56QQY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polarization Observations with the Cosmic Background Imager","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"A. C. S. Readhead, B. S. Mason, C. Achermann, C. Dickinson, C. Pryke, C. R. Contaldi, D. Pogosyan, E. M. Leitch, J. E. Carlstrom, J. K. Cartwright, J. L. Sievers, J. May, J. M. Kovac, J. R. Bond, L. Bronfman, M. C. Shepherd, M. Pospieszalski, P. Altamirano, R. Bustos, R. Reeves, S. Casassus, S. Padin, S. T. Myers, S. Torres, T. J. Pearson, W. L. Holzapfel","submitted_at":"2004-09-23T18:59:54Z","abstract_excerpt":"Polarization observations of the cosmic microwave background with the Cosmic Background Imager from September 2002 to May 2004 provide a significant detection of the E-mode polarization and reveal an angular power spectrum of polarized emission showing peaks and valleys that are shifted in phase by half a cycle relative to those of the total intensity spectrum. This key agreement between the phase of the observed polarization spectrum and that predicted based on the total intensity spectrum provides support for the standard model of cosmology, in which dark matter and dark energy are the domin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409569","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/astro-ph/0409569/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":"2026-07-04T14:13:46Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ih+f1SvFJnBsZVftmsfZ/ISB13QogewAKkLmvGM4doOlYxc4iuqejz+DQ2viB6Y4egO3HgaBWguQFc6KKpy4BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T07:43:31.458518Z"},"content_sha256":"88901a041f36c7db0271ec7c71d4b5666b1c4b972d95eb79dd3cddce8b7fa7ab","schema_version":"1.0","event_id":"sha256:88901a041f36c7db0271ec7c71d4b5666b1c4b972d95eb79dd3cddce8b7fa7ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/bundle.json","state_url":"https://pith.science/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/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":"2026-08-01T07:43:31Z","links":{"resolver":"https://pith.science/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY","bundle":"https://pith.science/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/bundle.json","state":"https://pith.science/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SBBKSL4WQVB2AUVAJAWQQ56QQY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2004:SBBKSL4WQVB2AUVAJAWQQ56QQY","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":"66f8445ebd7d1b89d0b07167fccb917a51c72a6030ac770c205768935652147f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-23T18:59:54Z","title_canon_sha256":"540dcb3088535cc9d5f561709c40391bd4b0ed67b7cbcdc2aa5537647fab3d4d"},"schema_version":"1.0","source":{"id":"astro-ph/0409569","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/0409569","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/0409569v2","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/0409569","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_12","alias_value":"SBBKSL4WQVB2","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_16","alias_value":"SBBKSL4WQVB2AUVA","created_at":"2026-07-04T14:13:46Z"},{"alias_kind":"pith_short_8","alias_value":"SBBKSL4W","created_at":"2026-07-04T14:13:46Z"}],"graph_snapshots":[{"event_id":"sha256:88901a041f36c7db0271ec7c71d4b5666b1c4b972d95eb79dd3cddce8b7fa7ab","target":"graph","created_at":"2026-07-04T14:13:46Z","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/astro-ph/0409569/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Polarization observations of the cosmic microwave background with the Cosmic Background Imager from September 2002 to May 2004 provide a significant detection of the E-mode polarization and reveal an angular power spectrum of polarized emission showing peaks and valleys that are shifted in phase by half a cycle relative to those of the total intensity spectrum. This key agreement between the phase of the observed polarization spectrum and that predicted based on the total intensity spectrum provides support for the standard model of cosmology, in which dark matter and dark energy are the domin","authors_text":"A. C. S. Readhead, B. S. Mason, C. Achermann, C. Dickinson, C. Pryke, C. R. Contaldi, D. Pogosyan, E. M. Leitch, J. E. Carlstrom, J. K. Cartwright, J. L. Sievers, J. May, J. M. Kovac, J. R. Bond, L. Bronfman, M. C. Shepherd, M. Pospieszalski, P. Altamirano, R. Bustos, R. Reeves, S. Casassus, S. Padin, S. T. Myers, S. Torres, T. J. Pearson, W. L. Holzapfel","cross_cats":[],"headline":"","license":"","primary_cat":"astro-ph","submitted_at":"2004-09-23T18:59:54Z","title":"Polarization Observations with the Cosmic Background Imager"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/0409569","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":"sha256:00646cd9c33d97824d19f64bb1c336893591438f630f31134de76d7bcc0d1f78","target":"record","created_at":"2026-07-04T14:13:46Z","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":"66f8445ebd7d1b89d0b07167fccb917a51c72a6030ac770c205768935652147f","cross_cats_sorted":[],"license":"","primary_cat":"astro-ph","submitted_at":"2004-09-23T18:59:54Z","title_canon_sha256":"540dcb3088535cc9d5f561709c40391bd4b0ed67b7cbcdc2aa5537647fab3d4d"},"schema_version":"1.0","source":{"id":"astro-ph/0409569","kind":"arxiv","version":2}},"canonical_sha256":"9042a92f968543a052a0482d0877d0861758c2c03711e35fdd22e02c17ef1859","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9042a92f968543a052a0482d0877d0861758c2c03711e35fdd22e02c17ef1859","first_computed_at":"2026-07-04T14:13:46.417807Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:13:46.417807Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vYLZQU2O2ufncaJutKxzKEQzxgqxDxwVHNaJWnrMAtBmLa3ACPpu6l+y/gNAHTTST+Fg6GOq9wLI8vcyZLmZDg==","signature_status":"signed_v1","signed_at":"2026-07-04T14:13:46.418279Z","signed_message":"canonical_sha256_bytes"},"source_id":"astro-ph/0409569","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:00646cd9c33d97824d19f64bb1c336893591438f630f31134de76d7bcc0d1f78","sha256:88901a041f36c7db0271ec7c71d4b5666b1c4b972d95eb79dd3cddce8b7fa7ab"],"state_sha256":"02a5450f8c0a688cd2c197037dd62d0948cf7809fa40257688f3cde2e23a0de6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ePMHYLr8lJFS7Foin4BkETmakObLIxu8fywGDDgKtctid7w1FtJyY7+3Ex2PIfRoRDE1gtfHWKpUuCiniAmZBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T07:43:31.462483Z","bundle_sha256":"fb678df4819dfe7264e8e6f8ed23a3ab02572b0f27cb1a9edac3f724320d8968"}}