{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:G3UR3GZQ3RDUTE4WBIE3V4U5AH","short_pith_number":"pith:G3UR3GZQ","canonical_record":{"source":{"id":"1503.01347","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-04T15:43:51Z","cross_cats_sorted":[],"title_canon_sha256":"978b308110ab95143a14ff73193681b05dd91c7a4429f3b934405daf1ce27dc1","abstract_canon_sha256":"52db8f745a0667363f14d0eaee0123355c56fddc465b4f27b216e41cb8c74128"},"schema_version":"1.0"},"canonical_sha256":"36e91d9b30dc474993960a09baf29d01ffc06351f8ca37073b63bcab06b3a445","source":{"kind":"arxiv","id":"1503.01347","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.01347","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"arxiv_version","alias_value":"1503.01347v2","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.01347","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"pith_short_12","alias_value":"G3UR3GZQ3RDU","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"G3UR3GZQ3RDUTE4W","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"G3UR3GZQ","created_at":"2026-05-18T12:29:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:G3UR3GZQ3RDUTE4WBIE3V4U5AH","target":"record","payload":{"canonical_record":{"source":{"id":"1503.01347","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-04T15:43:51Z","cross_cats_sorted":[],"title_canon_sha256":"978b308110ab95143a14ff73193681b05dd91c7a4429f3b934405daf1ce27dc1","abstract_canon_sha256":"52db8f745a0667363f14d0eaee0123355c56fddc465b4f27b216e41cb8c74128"},"schema_version":"1.0"},"canonical_sha256":"36e91d9b30dc474993960a09baf29d01ffc06351f8ca37073b63bcab06b3a445","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:33:51.860948Z","signature_b64":"gM5TtLgKQelKcU2iEDvG1x++QF9fKr0OoqI1hGxJYx3AJY5u9XZd/ze5fHcQ9IqNK3SsKT42AoiFUI9ek7gjAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36e91d9b30dc474993960a09baf29d01ffc06351f8ca37073b63bcab06b3a445","last_reissued_at":"2026-05-18T01:33:51.860469Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:33:51.860469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1503.01347","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":"2026-05-18T01:33:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aTgxt7qGU0K0PyZ88Lvv3vXhKeguMWNO839eajhIoKLmpIVKdoWROYrimMcVkIXlg+IZGQmtOzFHpNvDlbfdAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:04:33.947136Z"},"content_sha256":"9e6ad4a2d37a0fd96347638fbec93cde8d9fda6d7e6ab7e4f506b9f24670b16d","schema_version":"1.0","event_id":"sha256:9e6ad4a2d37a0fd96347638fbec93cde8d9fda6d7e6ab7e4f506b9f24670b16d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:G3UR3GZQ3RDUTE4WBIE3V4U5AH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large-scale CMB temperature and polarization cross-spectra likelihoods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A. Mangilli, M. Tristram, S. Plaszczynski","submitted_at":"2015-03-04T15:43:51Z","abstract_excerpt":"We present a cross-spectra based approach for the analysis of CMB data at large angular scales to constrain the reionization optical depth $\\tau$, the tensor to scalar ratio $r$ and the amplitude of the primordial scalar perturbations $A_s$. With respect to the pixel-based approach developed so far, using cross-spectra has the unique advantage to eliminate spurious noise bias and to give a better handle over residual systematics, allowing to efficiently combine the cosmological information encoded in cross-frequency or cross-dataset spectra. We present two solutions to deal with the non-Gaussi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.01347","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":"2026-05-18T01:33:51Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q/ymVTj/bd+scyN1TtWTrjmML0bfRzxF+byd/X8V6DWOrBy2AHfXC+Ra4NA28oOAZh0qLHPfOrNFxxmsWavpDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T18:04:33.947801Z"},"content_sha256":"c347fc1cf23e8a3383af0e8297e8b054fccb69b5f3adf857fb3de322de7f731a","schema_version":"1.0","event_id":"sha256:c347fc1cf23e8a3383af0e8297e8b054fccb69b5f3adf857fb3de322de7f731a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/bundle.json","state_url":"https://pith.science/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/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":"2026-06-07T18:04:33Z","links":{"resolver":"https://pith.science/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH","bundle":"https://pith.science/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/bundle.json","state":"https://pith.science/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G3UR3GZQ3RDUTE4WBIE3V4U5AH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:G3UR3GZQ3RDUTE4WBIE3V4U5AH","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":"52db8f745a0667363f14d0eaee0123355c56fddc465b4f27b216e41cb8c74128","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-04T15:43:51Z","title_canon_sha256":"978b308110ab95143a14ff73193681b05dd91c7a4429f3b934405daf1ce27dc1"},"schema_version":"1.0","source":{"id":"1503.01347","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1503.01347","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"arxiv_version","alias_value":"1503.01347v2","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1503.01347","created_at":"2026-05-18T01:33:51Z"},{"alias_kind":"pith_short_12","alias_value":"G3UR3GZQ3RDU","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_16","alias_value":"G3UR3GZQ3RDUTE4W","created_at":"2026-05-18T12:29:22Z"},{"alias_kind":"pith_short_8","alias_value":"G3UR3GZQ","created_at":"2026-05-18T12:29:22Z"}],"graph_snapshots":[{"event_id":"sha256:c347fc1cf23e8a3383af0e8297e8b054fccb69b5f3adf857fb3de322de7f731a","target":"graph","created_at":"2026-05-18T01:33:51Z","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 present a cross-spectra based approach for the analysis of CMB data at large angular scales to constrain the reionization optical depth $\\tau$, the tensor to scalar ratio $r$ and the amplitude of the primordial scalar perturbations $A_s$. With respect to the pixel-based approach developed so far, using cross-spectra has the unique advantage to eliminate spurious noise bias and to give a better handle over residual systematics, allowing to efficiently combine the cosmological information encoded in cross-frequency or cross-dataset spectra. We present two solutions to deal with the non-Gaussi","authors_text":"A. Mangilli, M. Tristram, S. Plaszczynski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-04T15:43:51Z","title":"Large-scale CMB temperature and polarization cross-spectra likelihoods"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.01347","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":"sha256:9e6ad4a2d37a0fd96347638fbec93cde8d9fda6d7e6ab7e4f506b9f24670b16d","target":"record","created_at":"2026-05-18T01:33:51Z","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":"52db8f745a0667363f14d0eaee0123355c56fddc465b4f27b216e41cb8c74128","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2015-03-04T15:43:51Z","title_canon_sha256":"978b308110ab95143a14ff73193681b05dd91c7a4429f3b934405daf1ce27dc1"},"schema_version":"1.0","source":{"id":"1503.01347","kind":"arxiv","version":2}},"canonical_sha256":"36e91d9b30dc474993960a09baf29d01ffc06351f8ca37073b63bcab06b3a445","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36e91d9b30dc474993960a09baf29d01ffc06351f8ca37073b63bcab06b3a445","first_computed_at":"2026-05-18T01:33:51.860469Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:33:51.860469Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gM5TtLgKQelKcU2iEDvG1x++QF9fKr0OoqI1hGxJYx3AJY5u9XZd/ze5fHcQ9IqNK3SsKT42AoiFUI9ek7gjAg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:33:51.860948Z","signed_message":"canonical_sha256_bytes"},"source_id":"1503.01347","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e6ad4a2d37a0fd96347638fbec93cde8d9fda6d7e6ab7e4f506b9f24670b16d","sha256:c347fc1cf23e8a3383af0e8297e8b054fccb69b5f3adf857fb3de322de7f731a"],"state_sha256":"709233e5079a9289b42de674b3515a93d88a5c646d3c4f9745ecda5c4f713c48"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"unaN/WNfHyAv9p19RIILVFJlgGjtB7YC3WroTvutgHB+u0wW2XNjvyzFZK2QV7c2oe/WjuJWNvxHfH7pS0+kAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T18:04:33.951328Z","bundle_sha256":"d8534cc88bc4da3d969a237e8882d3c91d48bf299dfca6e8571bc0099f2acec9"}}