{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:OQTCDXMOIEKNT5MH7ZWBTOEGUM","short_pith_number":"pith:OQTCDXMO","canonical_record":{"source":{"id":"1211.2929","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-13T09:35:14Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"0c6df85e3f04d347d59c27d69d7cd516053505d20428f84146616bd9aa574d43","abstract_canon_sha256":"13a8c6c84bce805bc35b7833da90a0fdb38c746c28d190d25da0fa7f50029d05"},"schema_version":"1.0"},"canonical_sha256":"742621dd8e4114d9f587fe6c19b886a32d4feaf58069f25471d33948cfed0a8f","source":{"kind":"arxiv","id":"1211.2929","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2929","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2929v1","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2929","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"pith_short_12","alias_value":"OQTCDXMOIEKN","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OQTCDXMOIEKNT5MH","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OQTCDXMO","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:OQTCDXMOIEKNT5MH7ZWBTOEGUM","target":"record","payload":{"canonical_record":{"source":{"id":"1211.2929","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-13T09:35:14Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"0c6df85e3f04d347d59c27d69d7cd516053505d20428f84146616bd9aa574d43","abstract_canon_sha256":"13a8c6c84bce805bc35b7833da90a0fdb38c746c28d190d25da0fa7f50029d05"},"schema_version":"1.0"},"canonical_sha256":"742621dd8e4114d9f587fe6c19b886a32d4feaf58069f25471d33948cfed0a8f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:16.294572Z","signature_b64":"X+wWpe24qFW1H3bZ3kixBj3clT25H3OKUePwWjrE3tMDBXlaGPm7E1KPyglkL/Qyw3CCqGC8hwQVQWqHiKPyAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"742621dd8e4114d9f587fe6c19b886a32d4feaf58069f25471d33948cfed0a8f","last_reissued_at":"2026-05-18T01:53:16.293967Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:16.293967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.2929","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":"2026-05-18T01:53:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uYz3hThl7L0fK/preoqtc8InHjfziOTjN+ousozr5xHEi+J/nSI+GbNspS5LqQq3VbuPpd9Luw/h342v8JDACw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:34:28.288327Z"},"content_sha256":"22842138d10eef1e85cffa77a10fb85ec8f0c5beead0e9942de172e446061113","schema_version":"1.0","event_id":"sha256:22842138d10eef1e85cffa77a10fb85ec8f0c5beead0e9942de172e446061113"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:OQTCDXMOIEKNT5MH7ZWBTOEGUM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Atmospheric monitoring in the mm and sub-mm bands for cosmological observations: CASPER2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Barbara Decina, Juan R. Pardo, Luca Lamagna, Marco De Petris, Simone De Gregori","submitted_at":"2012-11-13T09:35:14Z","abstract_excerpt":"Cosmological observations from ground at millimetre and sub-millimetre wavelengths are affected by atmospheric absorption and consequent emission. The low and high frequency (sky noise) fluctuations of atmospheric performance imply careful observational strategies and/or instrument technical solutions. Measurements of atmospheric emission spectra are necessary for accurate calibration procedures as well as for site testing statistics. CASPER2, an instrument to explore the 90-450 GHz (3-15 1/cm) spectral region, was developed and verified its operation in the Alps. A Martin-Puplett Interferomet"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2929","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":"2026-05-18T01:53:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xFb143Oa/nUbErX9mFAgGWCiEn5XeW4s/pq0a2IEhkF3cjjVzN2YRq1JQkR/7Ddifnt/HRzkPIklw9h7gnHKBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T18:34:28.289020Z"},"content_sha256":"9290370c889dfa859a27717477ed4db78d4df9c7bbbcf500faa4c1cf2b3642cf","schema_version":"1.0","event_id":"sha256:9290370c889dfa859a27717477ed4db78d4df9c7bbbcf500faa4c1cf2b3642cf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/bundle.json","state_url":"https://pith.science/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/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":"2026-06-06T18:34:28Z","links":{"resolver":"https://pith.science/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM","bundle":"https://pith.science/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/bundle.json","state":"https://pith.science/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OQTCDXMOIEKNT5MH7ZWBTOEGUM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:OQTCDXMOIEKNT5MH7ZWBTOEGUM","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":"13a8c6c84bce805bc35b7833da90a0fdb38c746c28d190d25da0fa7f50029d05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-13T09:35:14Z","title_canon_sha256":"0c6df85e3f04d347d59c27d69d7cd516053505d20428f84146616bd9aa574d43"},"schema_version":"1.0","source":{"id":"1211.2929","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2929","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2929v1","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2929","created_at":"2026-05-18T01:53:16Z"},{"alias_kind":"pith_short_12","alias_value":"OQTCDXMOIEKN","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"OQTCDXMOIEKNT5MH","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"OQTCDXMO","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:9290370c889dfa859a27717477ed4db78d4df9c7bbbcf500faa4c1cf2b3642cf","target":"graph","created_at":"2026-05-18T01:53:16Z","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":"Cosmological observations from ground at millimetre and sub-millimetre wavelengths are affected by atmospheric absorption and consequent emission. The low and high frequency (sky noise) fluctuations of atmospheric performance imply careful observational strategies and/or instrument technical solutions. Measurements of atmospheric emission spectra are necessary for accurate calibration procedures as well as for site testing statistics. CASPER2, an instrument to explore the 90-450 GHz (3-15 1/cm) spectral region, was developed and verified its operation in the Alps. A Martin-Puplett Interferomet","authors_text":"Barbara Decina, Juan R. Pardo, Luca Lamagna, Marco De Petris, Simone De Gregori","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-13T09:35:14Z","title":"Atmospheric monitoring in the mm and sub-mm bands for cosmological observations: CASPER2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2929","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":"sha256:22842138d10eef1e85cffa77a10fb85ec8f0c5beead0e9942de172e446061113","target":"record","created_at":"2026-05-18T01:53:16Z","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":"13a8c6c84bce805bc35b7833da90a0fdb38c746c28d190d25da0fa7f50029d05","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2012-11-13T09:35:14Z","title_canon_sha256":"0c6df85e3f04d347d59c27d69d7cd516053505d20428f84146616bd9aa574d43"},"schema_version":"1.0","source":{"id":"1211.2929","kind":"arxiv","version":1}},"canonical_sha256":"742621dd8e4114d9f587fe6c19b886a32d4feaf58069f25471d33948cfed0a8f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"742621dd8e4114d9f587fe6c19b886a32d4feaf58069f25471d33948cfed0a8f","first_computed_at":"2026-05-18T01:53:16.293967Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:16.293967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X+wWpe24qFW1H3bZ3kixBj3clT25H3OKUePwWjrE3tMDBXlaGPm7E1KPyglkL/Qyw3CCqGC8hwQVQWqHiKPyAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:16.294572Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.2929","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:22842138d10eef1e85cffa77a10fb85ec8f0c5beead0e9942de172e446061113","sha256:9290370c889dfa859a27717477ed4db78d4df9c7bbbcf500faa4c1cf2b3642cf"],"state_sha256":"fd32556ec6518ed6ece2f9f70a455f732b3879609d23c2d6b447a518b9e7118d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OhAmU7NaGo63nvImDlkDFUQ3+YS6jHeZ93oSxuN0xStRgEs9m6njqiaX5agam84ByFcY61o0jn2MreF84uWiDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T18:34:28.292681Z","bundle_sha256":"6aaf16cfbb0a818a7f300a7b2a7082edec66cf6c9524f6567b0e804b34b91455"}}