{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:MC2SEXVRR3GKYJOJXQUDEHR2CX","short_pith_number":"pith:MC2SEXVR","canonical_record":{"source":{"id":"1702.07467","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-24T05:26:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d7994803a69e0da06e7c9682aa8a4286053da80b4d271229ebd66fa27dee4684","abstract_canon_sha256":"f9305c9e23ebb6fae44b8fcaead3dee34c8edebd8a7522127945ec686c019cab"},"schema_version":"1.0"},"canonical_sha256":"60b5225eb18eccac25c9bc28321e3a15d1e6906e70f9cdc2f207dd26538a1d92","source":{"kind":"arxiv","id":"1702.07467","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07467","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07467v2","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07467","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"pith_short_12","alias_value":"MC2SEXVRR3GK","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MC2SEXVRR3GKYJOJ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MC2SEXVR","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:MC2SEXVRR3GKYJOJXQUDEHR2CX","target":"record","payload":{"canonical_record":{"source":{"id":"1702.07467","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-24T05:26:06Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d7994803a69e0da06e7c9682aa8a4286053da80b4d271229ebd66fa27dee4684","abstract_canon_sha256":"f9305c9e23ebb6fae44b8fcaead3dee34c8edebd8a7522127945ec686c019cab"},"schema_version":"1.0"},"canonical_sha256":"60b5225eb18eccac25c9bc28321e3a15d1e6906e70f9cdc2f207dd26538a1d92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:59.605619Z","signature_b64":"YxhHrnS00JmfoZqYqHOEyI4UfcjZtYaje8WvGaugrDih0wtXRreqJNlX2YFtwDKu6FbQmexYvUnW0c3o0ow1Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"60b5225eb18eccac25c9bc28321e3a15d1e6906e70f9cdc2f207dd26538a1d92","last_reissued_at":"2026-05-18T00:22:59.604948Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:59.604948Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1702.07467","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":"2026-05-18T00:22:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PIowJoddQ9IJCs8iWlo4uEYn6+EXDqIzufZl0aanQ2+tfGya5kKolhkpxwLw7jND6nkS9FWcZbipeGel7XxaDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:00:13.747777Z"},"content_sha256":"e61c2925fa5da818311aa9246e2c3a5b7f8fa6188e01f888d2710b2d537dce28","schema_version":"1.0","event_id":"sha256:e61c2925fa5da818311aa9246e2c3a5b7f8fa6188e01f888d2710b2d537dce28"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:MC2SEXVRR3GKYJOJXQUDEHR2CX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimization Study for the Experimental Configuration of CMB-S4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"Adrian T. Lee, Akito Kusaka, Aritoki Suzuki, Blake D. Sherwin, Darcy Barron, Josquin Errard, Julian Borril, Natalie A. Roe, Reijo Keskitalo, Simone Ferraro, Stephen Feeney, Yuji Chinone","submitted_at":"2017-02-24T05:26:06Z","abstract_excerpt":"The CMB Stage 4 (CMB-S4) experiment is a next-generation, ground-based experiment that will measure the cosmic microwave background (CMB) polarization to unprecedented accuracy, probing the signature of inflation, the nature of cosmic neutrinos, relativistic thermal relics in the early universe, and the evolution of the universe. To advance the progress towards designing the instrument for CMB-S4, we have established a framework to optimize the instrumental configuration to maximize its scientific output. In this paper, we report our first results from this framework, using simplified instrume"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07467","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":"2026-05-18T00:22:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U8n4D0a24j42fgRfXDm8cdTM4T7fPcnYZLrrwjDfwfVDKjcHtb6CO5dF/2y4sT+fjuF+NV+VcanXnH42U3g1DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T17:00:13.748098Z"},"content_sha256":"1e428ff9cbf74a731c9f873bf724335b29a02b2950f62e1d6417becda010ec4e","schema_version":"1.0","event_id":"sha256:1e428ff9cbf74a731c9f873bf724335b29a02b2950f62e1d6417becda010ec4e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/bundle.json","state_url":"https://pith.science/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/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":"2026-08-14T17:00:13Z","links":{"resolver":"https://pith.science/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX","bundle":"https://pith.science/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/bundle.json","state":"https://pith.science/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MC2SEXVRR3GKYJOJXQUDEHR2CX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MC2SEXVRR3GKYJOJXQUDEHR2CX","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":"f9305c9e23ebb6fae44b8fcaead3dee34c8edebd8a7522127945ec686c019cab","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-24T05:26:06Z","title_canon_sha256":"d7994803a69e0da06e7c9682aa8a4286053da80b4d271229ebd66fa27dee4684"},"schema_version":"1.0","source":{"id":"1702.07467","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1702.07467","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"arxiv_version","alias_value":"1702.07467v2","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1702.07467","created_at":"2026-05-18T00:22:59Z"},{"alias_kind":"pith_short_12","alias_value":"MC2SEXVRR3GK","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MC2SEXVRR3GKYJOJ","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MC2SEXVR","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:1e428ff9cbf74a731c9f873bf724335b29a02b2950f62e1d6417becda010ec4e","target":"graph","created_at":"2026-05-18T00:22:59Z","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":"The CMB Stage 4 (CMB-S4) experiment is a next-generation, ground-based experiment that will measure the cosmic microwave background (CMB) polarization to unprecedented accuracy, probing the signature of inflation, the nature of cosmic neutrinos, relativistic thermal relics in the early universe, and the evolution of the universe. To advance the progress towards designing the instrument for CMB-S4, we have established a framework to optimize the instrumental configuration to maximize its scientific output. In this paper, we report our first results from this framework, using simplified instrume","authors_text":"Adrian T. Lee, Akito Kusaka, Aritoki Suzuki, Blake D. Sherwin, Darcy Barron, Josquin Errard, Julian Borril, Natalie A. Roe, Reijo Keskitalo, Simone Ferraro, Stephen Feeney, Yuji Chinone","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-24T05:26:06Z","title":"Optimization Study for the Experimental Configuration of CMB-S4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1702.07467","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:e61c2925fa5da818311aa9246e2c3a5b7f8fa6188e01f888d2710b2d537dce28","target":"record","created_at":"2026-05-18T00:22:59Z","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":"f9305c9e23ebb6fae44b8fcaead3dee34c8edebd8a7522127945ec686c019cab","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-02-24T05:26:06Z","title_canon_sha256":"d7994803a69e0da06e7c9682aa8a4286053da80b4d271229ebd66fa27dee4684"},"schema_version":"1.0","source":{"id":"1702.07467","kind":"arxiv","version":2}},"canonical_sha256":"60b5225eb18eccac25c9bc28321e3a15d1e6906e70f9cdc2f207dd26538a1d92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"60b5225eb18eccac25c9bc28321e3a15d1e6906e70f9cdc2f207dd26538a1d92","first_computed_at":"2026-05-18T00:22:59.604948Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:59.604948Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"YxhHrnS00JmfoZqYqHOEyI4UfcjZtYaje8WvGaugrDih0wtXRreqJNlX2YFtwDKu6FbQmexYvUnW0c3o0ow1Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:59.605619Z","signed_message":"canonical_sha256_bytes"},"source_id":"1702.07467","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e61c2925fa5da818311aa9246e2c3a5b7f8fa6188e01f888d2710b2d537dce28","sha256:1e428ff9cbf74a731c9f873bf724335b29a02b2950f62e1d6417becda010ec4e"],"state_sha256":"310b5b4b3364b2f46f3227e5e17b00ea7c8dbc19b1f5a6d7eaa93a4db15c2d4f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"383mH6/BvV8mJv3ofe5FKWDYM/iUgnXnRak7u8VPiMYvau5/+CpV4YvfERU7+/CCsq3tO7LuQmyNnNSb9qU9AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T17:00:13.750721Z","bundle_sha256":"89fe7faa0b68801a24793896b24b66c16bf261136c50d38f60639708e074fa7e"}}