{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:T7KNDOQPTRMH2OKUEFRKOOFCS3","short_pith_number":"pith:T7KNDOQP","canonical_record":{"source":{"id":"1206.0481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-03T19:27:05Z","cross_cats_sorted":["astro-ph.IM","physics.ao-ph"],"title_canon_sha256":"301f20407510149555b391e6edc3e500f820d76cb91152d0b8eb2ca3e0b9ced4","abstract_canon_sha256":"da07399c85f3a3c6d8497093beabb0d590c40782e6123b93d327a8872f733291"},"schema_version":"1.0"},"canonical_sha256":"9fd4d1ba0f9c587d39542162a738a296f193a8a701d996d7c152d207c6f1374d","source":{"kind":"arxiv","id":"1206.0481","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0481","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0481v1","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0481","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"pith_short_12","alias_value":"T7KNDOQPTRMH","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"T7KNDOQPTRMH2OKU","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"T7KNDOQP","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:T7KNDOQPTRMH2OKUEFRKOOFCS3","target":"record","payload":{"canonical_record":{"source":{"id":"1206.0481","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-03T19:27:05Z","cross_cats_sorted":["astro-ph.IM","physics.ao-ph"],"title_canon_sha256":"301f20407510149555b391e6edc3e500f820d76cb91152d0b8eb2ca3e0b9ced4","abstract_canon_sha256":"da07399c85f3a3c6d8497093beabb0d590c40782e6123b93d327a8872f733291"},"schema_version":"1.0"},"canonical_sha256":"9fd4d1ba0f9c587d39542162a738a296f193a8a701d996d7c152d207c6f1374d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:54:17.536991Z","signature_b64":"yX34kfCKVLwYVRu2xOo1o+I4l8iN+/fixl8NqkWwVtAYgzwtfVVHILNpYyQMAAjaPg6+UDdSp9yWWIjw68JwDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9fd4d1ba0f9c587d39542162a738a296f193a8a701d996d7c152d207c6f1374d","last_reissued_at":"2026-05-18T03:54:17.536204Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:54:17.536204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.0481","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:54:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tGqOaYmaiOAyZ0RMSZGhSq512Z4w8PzbYR9zGPo1IFaSoSE9/D3fqwrfgYIh9urzEuMs7oCYX4Dh9RjzbPm3DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:49:35.299246Z"},"content_sha256":"a6b41470f397a0d9d80884e16220c7656023ad816e5c949003131ed958cad097","schema_version":"1.0","event_id":"sha256:a6b41470f397a0d9d80884e16220c7656023ad816e5c949003131ed958cad097"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:T7KNDOQPTRMH2OKUEFRKOOFCS3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A template of atmospheric molecular oxygen circularly polarized emission for CMB experiments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.IM","physics.ao-ph"],"primary_cat":"astro-ph.CO","authors_text":"Andrea Tartari, Giulio Fabbian, Mario Zannoni, Massimo Gervasi, Sebastiano Spinelli","submitted_at":"2012-06-03T19:27:05Z","abstract_excerpt":"We compute the polarized signal from atmospheric molecular oxygen due to Zeeman effect in the Earth magnetic field for various sites suitable for CMB measurements such as South Pole, Dome C (Antarctica) and Atacama desert (Chile). We present maps of this signal for those sites and show their typical elevation and azimuth dependencies. We find a typical circularly polarized signal (V Stokes parameter) level of 50 - 300 \\mu K at 90 GHz when looking at the zenith; Atacama site shows the lowest emission while Dome C site presents the lowest gradient in polarized brightness temperature (0.3 \\mu K/d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0481","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":""},"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":"2026-05-18T03:54:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0tG5mYSH0xhs8EY7KLYAguP8KRrR3isXvai0LUX/VEH+sjMNZLTQe1eUU2N7FCqS9FtUjN6GWMrgMF1TSrLrDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T22:49:35.300038Z"},"content_sha256":"64a5ac63108321f89d52e36da22ada2fe5cbd7efbc8def70c31ba6b8508b3100","schema_version":"1.0","event_id":"sha256:64a5ac63108321f89d52e36da22ada2fe5cbd7efbc8def70c31ba6b8508b3100"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/bundle.json","state_url":"https://pith.science/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/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":"2026-05-30T22:49:35Z","links":{"resolver":"https://pith.science/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3","bundle":"https://pith.science/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/bundle.json","state":"https://pith.science/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/T7KNDOQPTRMH2OKUEFRKOOFCS3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:T7KNDOQPTRMH2OKUEFRKOOFCS3","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":"da07399c85f3a3c6d8497093beabb0d590c40782e6123b93d327a8872f733291","cross_cats_sorted":["astro-ph.IM","physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-03T19:27:05Z","title_canon_sha256":"301f20407510149555b391e6edc3e500f820d76cb91152d0b8eb2ca3e0b9ced4"},"schema_version":"1.0","source":{"id":"1206.0481","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.0481","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"arxiv_version","alias_value":"1206.0481v1","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.0481","created_at":"2026-05-18T03:54:17Z"},{"alias_kind":"pith_short_12","alias_value":"T7KNDOQPTRMH","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"T7KNDOQPTRMH2OKU","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"T7KNDOQP","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:64a5ac63108321f89d52e36da22ada2fe5cbd7efbc8def70c31ba6b8508b3100","target":"graph","created_at":"2026-05-18T03:54:17Z","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 compute the polarized signal from atmospheric molecular oxygen due to Zeeman effect in the Earth magnetic field for various sites suitable for CMB measurements such as South Pole, Dome C (Antarctica) and Atacama desert (Chile). We present maps of this signal for those sites and show their typical elevation and azimuth dependencies. We find a typical circularly polarized signal (V Stokes parameter) level of 50 - 300 \\mu K at 90 GHz when looking at the zenith; Atacama site shows the lowest emission while Dome C site presents the lowest gradient in polarized brightness temperature (0.3 \\mu K/d","authors_text":"Andrea Tartari, Giulio Fabbian, Mario Zannoni, Massimo Gervasi, Sebastiano Spinelli","cross_cats":["astro-ph.IM","physics.ao-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-03T19:27:05Z","title":"A template of atmospheric molecular oxygen circularly polarized emission for CMB experiments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.0481","kind":"arxiv","version":1},"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:a6b41470f397a0d9d80884e16220c7656023ad816e5c949003131ed958cad097","target":"record","created_at":"2026-05-18T03:54:17Z","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":"da07399c85f3a3c6d8497093beabb0d590c40782e6123b93d327a8872f733291","cross_cats_sorted":["astro-ph.IM","physics.ao-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2012-06-03T19:27:05Z","title_canon_sha256":"301f20407510149555b391e6edc3e500f820d76cb91152d0b8eb2ca3e0b9ced4"},"schema_version":"1.0","source":{"id":"1206.0481","kind":"arxiv","version":1}},"canonical_sha256":"9fd4d1ba0f9c587d39542162a738a296f193a8a701d996d7c152d207c6f1374d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9fd4d1ba0f9c587d39542162a738a296f193a8a701d996d7c152d207c6f1374d","first_computed_at":"2026-05-18T03:54:17.536204Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:54:17.536204Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yX34kfCKVLwYVRu2xOo1o+I4l8iN+/fixl8NqkWwVtAYgzwtfVVHILNpYyQMAAjaPg6+UDdSp9yWWIjw68JwDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:54:17.536991Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.0481","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6b41470f397a0d9d80884e16220c7656023ad816e5c949003131ed958cad097","sha256:64a5ac63108321f89d52e36da22ada2fe5cbd7efbc8def70c31ba6b8508b3100"],"state_sha256":"deec15988a46ae0bee6e120607c731557d2eea0809cbe2ead3d393ff157d0e9e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vMZTIU/Wwqe9NdU+ciUhnPog+kvO79QJjJbtwB+jfKsB2ZEu/BXnbr8RfKhv6fIQxjKbtsX3VWwe3GhvMqr3DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T22:49:35.303897Z","bundle_sha256":"9e60a399f83d8a1eaa6b8bf9f6c2457cfccc26328d88de36fd0070cb2916ab69"}}