{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:XBYTBV7UFACPHR5WAYOGCODFC2","short_pith_number":"pith:XBYTBV7U","canonical_record":{"source":{"id":"0912.4059","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-21T11:23:40Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"e972620db36d6a9bb4ac2f033d2de06a3bc7c1518bf3260adaab7ff5204d5219","abstract_canon_sha256":"995aec1f139219206de7f6f82de166e02072ffd3084f1af4399882c47c69c333"},"schema_version":"1.0"},"canonical_sha256":"b87130d7f42804f3c7b6061c613865168c13fafafe928b60aa2798f90b455b2a","source":{"kind":"arxiv","id":"0912.4059","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4059","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4059v2","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4059","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"pith_short_12","alias_value":"XBYTBV7UFACP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XBYTBV7UFACPHR5W","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XBYTBV7U","created_at":"2026-05-18T12:26:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:XBYTBV7UFACPHR5WAYOGCODFC2","target":"record","payload":{"canonical_record":{"source":{"id":"0912.4059","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-21T11:23:40Z","cross_cats_sorted":["astro-ph.IM"],"title_canon_sha256":"e972620db36d6a9bb4ac2f033d2de06a3bc7c1518bf3260adaab7ff5204d5219","abstract_canon_sha256":"995aec1f139219206de7f6f82de166e02072ffd3084f1af4399882c47c69c333"},"schema_version":"1.0"},"canonical_sha256":"b87130d7f42804f3c7b6061c613865168c13fafafe928b60aa2798f90b455b2a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:24:45.560588Z","signature_b64":"uTzl7Nt2iPKKBqKXkm14Fqu4VhEMObIIgsXULV5rPqc9XKgDqV3zI12hhWc7AhI0fpOhS6dfbpq5P8BjLbL1DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b87130d7f42804f3c7b6061c613865168c13fafafe928b60aa2798f90b455b2a","last_reissued_at":"2026-05-18T02:24:45.560047Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:24:45.560047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.4059","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":"2026-05-18T02:24:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qhOYrvZtkSX2rfXU7boZ1RDHVptRUmOwikfPip5zBf9rvPNFJUsqXYgxVt/EU2xwJSv3TubkD5rewt1MLQRxCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:48:26.881762Z"},"content_sha256":"bfc5731e1b54b1dd5c095848f562bf3805ccfa7b1684fc5f19abb2b0e50dac37","schema_version":"1.0","event_id":"sha256:bfc5731e1b54b1dd5c095848f562bf3805ccfa7b1684fc5f19abb2b0e50dac37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:XBYTBV7UFACPHR5WAYOGCODFC2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Application of XFaster power spectrum and likelihood estimator to Planck","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM"],"primary_cat":"astro-ph.CO","authors_text":"C. R. Contaldi, G. Rocha, J. R. Bond, K. M. Gorski","submitted_at":"2009-12-21T11:23:40Z","abstract_excerpt":"We develop the XFaster Cosmic Microwave Background (CMB) temperature and polarization anisotropy power spectrum and likelihood technique for the Planck CMB satellite mission. We give an overview of this estimator and its current implementation and present the results of applying this algorithm to simulated Planck data. We show that it can accurately extract the power spectrum of Planck data for the high-l multipoles range. We compare the XFaster approximation for the likelihood to other high-l likelihood approximations such as Gaussian and Offset Lognormal and a low-l pixel-based likelihood. W"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4059","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":"2026-05-18T02:24:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0A/6vG4IkLRQPsXGZWROmXalHlidV5hli3TbbcAUs9aep/FOkZIJWo1NPzJRWbCWg0QaXckm1L0kdtaBp6d2CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T20:48:26.882145Z"},"content_sha256":"0ea21e622c5e40b0848de6f9e382c959054f994e57919d48dbaa39f2a02cb099","schema_version":"1.0","event_id":"sha256:0ea21e622c5e40b0848de6f9e382c959054f994e57919d48dbaa39f2a02cb099"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XBYTBV7UFACPHR5WAYOGCODFC2/bundle.json","state_url":"https://pith.science/pith/XBYTBV7UFACPHR5WAYOGCODFC2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XBYTBV7UFACPHR5WAYOGCODFC2/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":"2026-05-28T20:48:26Z","links":{"resolver":"https://pith.science/pith/XBYTBV7UFACPHR5WAYOGCODFC2","bundle":"https://pith.science/pith/XBYTBV7UFACPHR5WAYOGCODFC2/bundle.json","state":"https://pith.science/pith/XBYTBV7UFACPHR5WAYOGCODFC2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XBYTBV7UFACPHR5WAYOGCODFC2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:XBYTBV7UFACPHR5WAYOGCODFC2","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":"995aec1f139219206de7f6f82de166e02072ffd3084f1af4399882c47c69c333","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-21T11:23:40Z","title_canon_sha256":"e972620db36d6a9bb4ac2f033d2de06a3bc7c1518bf3260adaab7ff5204d5219"},"schema_version":"1.0","source":{"id":"0912.4059","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4059","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4059v2","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4059","created_at":"2026-05-18T02:24:45Z"},{"alias_kind":"pith_short_12","alias_value":"XBYTBV7UFACP","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XBYTBV7UFACPHR5W","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XBYTBV7U","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:0ea21e622c5e40b0848de6f9e382c959054f994e57919d48dbaa39f2a02cb099","target":"graph","created_at":"2026-05-18T02:24:45Z","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":"We develop the XFaster Cosmic Microwave Background (CMB) temperature and polarization anisotropy power spectrum and likelihood technique for the Planck CMB satellite mission. We give an overview of this estimator and its current implementation and present the results of applying this algorithm to simulated Planck data. We show that it can accurately extract the power spectrum of Planck data for the high-l multipoles range. We compare the XFaster approximation for the likelihood to other high-l likelihood approximations such as Gaussian and Offset Lognormal and a low-l pixel-based likelihood. W","authors_text":"C. R. Contaldi, G. Rocha, J. R. Bond, K. M. Gorski","cross_cats":["astro-ph.IM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-21T11:23:40Z","title":"Application of XFaster power spectrum and likelihood estimator to Planck"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4059","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:bfc5731e1b54b1dd5c095848f562bf3805ccfa7b1684fc5f19abb2b0e50dac37","target":"record","created_at":"2026-05-18T02:24:45Z","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":"995aec1f139219206de7f6f82de166e02072ffd3084f1af4399882c47c69c333","cross_cats_sorted":["astro-ph.IM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2009-12-21T11:23:40Z","title_canon_sha256":"e972620db36d6a9bb4ac2f033d2de06a3bc7c1518bf3260adaab7ff5204d5219"},"schema_version":"1.0","source":{"id":"0912.4059","kind":"arxiv","version":2}},"canonical_sha256":"b87130d7f42804f3c7b6061c613865168c13fafafe928b60aa2798f90b455b2a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b87130d7f42804f3c7b6061c613865168c13fafafe928b60aa2798f90b455b2a","first_computed_at":"2026-05-18T02:24:45.560047Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:24:45.560047Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uTzl7Nt2iPKKBqKXkm14Fqu4VhEMObIIgsXULV5rPqc9XKgDqV3zI12hhWc7AhI0fpOhS6dfbpq5P8BjLbL1DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:24:45.560588Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.4059","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bfc5731e1b54b1dd5c095848f562bf3805ccfa7b1684fc5f19abb2b0e50dac37","sha256:0ea21e622c5e40b0848de6f9e382c959054f994e57919d48dbaa39f2a02cb099"],"state_sha256":"56836be441189808604649e01c30a180addc3880652b635764041568d10ce0d4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PB3+Z1yA3ugOG0dYXh++NE9ts0Djm8NcJN69oG44aH/fA+USmY4jJwKr7XEFI0Z2OPF+qX8RyhFuKOpsJpx+Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T20:48:26.884388Z","bundle_sha256":"69f97e546818d992450921e8c6ac8bb7e2101426a5eff270445017bd2a7e7e29"}}