{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:M6RETUXGZBB6I3EOT2RTYCCFAB","short_pith_number":"pith:M6RETUXG","canonical_record":{"source":{"id":"1710.04938","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-10-13T14:24:07Z","cross_cats_sorted":[],"title_canon_sha256":"681a6893c1f0f6eb462a55515da5729b2b535950e9e5b27100316c5eff979672","abstract_canon_sha256":"1e0372e992223ff78c0ceec976aba2eb603caa37849a9ba31c10a3253d4a663a"},"schema_version":"1.0"},"canonical_sha256":"67a249d2e6c843e46c8e9ea33c08450074a1dc202b7cec0c43dd5eca09e946fd","source":{"kind":"arxiv","id":"1710.04938","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.04938","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"arxiv_version","alias_value":"1710.04938v1","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.04938","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"pith_short_12","alias_value":"M6RETUXGZBB6","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"M6RETUXGZBB6I3EO","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"M6RETUXG","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:M6RETUXGZBB6I3EOT2RTYCCFAB","target":"record","payload":{"canonical_record":{"source":{"id":"1710.04938","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-10-13T14:24:07Z","cross_cats_sorted":[],"title_canon_sha256":"681a6893c1f0f6eb462a55515da5729b2b535950e9e5b27100316c5eff979672","abstract_canon_sha256":"1e0372e992223ff78c0ceec976aba2eb603caa37849a9ba31c10a3253d4a663a"},"schema_version":"1.0"},"canonical_sha256":"67a249d2e6c843e46c8e9ea33c08450074a1dc202b7cec0c43dd5eca09e946fd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:31:11.347807Z","signature_b64":"xssK+UiclNQ/lVDEB7kzsMXkw2bFzgOVOb+br0JYNIIwRs8uHNvSFZldKpNDqhBhaK13JbIRFGwvFCmgwkCXAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"67a249d2e6c843e46c8e9ea33c08450074a1dc202b7cec0c43dd5eca09e946fd","last_reissued_at":"2026-05-18T00:31:11.347063Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:31:11.347063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.04938","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":"2026-05-18T00:31:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"914Ky3ws6nwPTAcn9jjnpBczDwlAKCVNaOXKlQ632PtDg8vEYmHDtwmXYGIJCJskgDpUR50aaFmcxRvpK9MkAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:27:17.305643Z"},"content_sha256":"e75306ebd690e7a00a111a2849cd8edba366691b27638c4de52c9f6390a59559","schema_version":"1.0","event_id":"sha256:e75306ebd690e7a00a111a2849cd8edba366691b27638c4de52c9f6390a59559"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:M6RETUXGZBB6I3EOT2RTYCCFAB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Low-cost Environmental Control System for Precise Radial Velocity Spectrometers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Cullen H. Blake, David H. Sliski, Samuel Halverson","submitted_at":"2017-10-13T14:24:07Z","abstract_excerpt":"We present an Environmental Control System (ECS) designed to achieve milliKelvin (mK) level temperature stability for small-scale astronomical instruments. This ECS is inexpensive and is primarily built from commercially available components. The primary application for our ECS is the high-precision Doppler spectrometer MINERVA-Red, where the thermal variations of the optical components within the instrument represent a major source of systematic error. We demonstrate $\\pm 2$ mK temperature stability within a 0.5 m$^{3}$ Thermal Enclosure using resistive heaters in conjunction with a commercia"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.04938","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":"2026-05-18T00:31:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bE3m+KCqXlO5GAjXP4MpHMnQDlnf0GZTU9EOX8PWFDanMmekkVIUFeoKUFQpENrIxAV4e5uZqcd2rTr7jF+zDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T20:27:17.306013Z"},"content_sha256":"5571d367bd85f84f4662a9a0e0ee27d10cf5af53dd5a691664c636819304ae34","schema_version":"1.0","event_id":"sha256:5571d367bd85f84f4662a9a0e0ee27d10cf5af53dd5a691664c636819304ae34"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/bundle.json","state_url":"https://pith.science/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/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":"2026-06-02T20:27:17Z","links":{"resolver":"https://pith.science/pith/M6RETUXGZBB6I3EOT2RTYCCFAB","bundle":"https://pith.science/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/bundle.json","state":"https://pith.science/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/M6RETUXGZBB6I3EOT2RTYCCFAB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:M6RETUXGZBB6I3EOT2RTYCCFAB","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":"1e0372e992223ff78c0ceec976aba2eb603caa37849a9ba31c10a3253d4a663a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-10-13T14:24:07Z","title_canon_sha256":"681a6893c1f0f6eb462a55515da5729b2b535950e9e5b27100316c5eff979672"},"schema_version":"1.0","source":{"id":"1710.04938","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.04938","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"arxiv_version","alias_value":"1710.04938v1","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.04938","created_at":"2026-05-18T00:31:11Z"},{"alias_kind":"pith_short_12","alias_value":"M6RETUXGZBB6","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"M6RETUXGZBB6I3EO","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"M6RETUXG","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:5571d367bd85f84f4662a9a0e0ee27d10cf5af53dd5a691664c636819304ae34","target":"graph","created_at":"2026-05-18T00:31:11Z","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 an Environmental Control System (ECS) designed to achieve milliKelvin (mK) level temperature stability for small-scale astronomical instruments. This ECS is inexpensive and is primarily built from commercially available components. The primary application for our ECS is the high-precision Doppler spectrometer MINERVA-Red, where the thermal variations of the optical components within the instrument represent a major source of systematic error. We demonstrate $\\pm 2$ mK temperature stability within a 0.5 m$^{3}$ Thermal Enclosure using resistive heaters in conjunction with a commercia","authors_text":"Cullen H. Blake, David H. Sliski, Samuel Halverson","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-10-13T14:24:07Z","title":"A Low-cost Environmental Control System for Precise Radial Velocity Spectrometers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.04938","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:e75306ebd690e7a00a111a2849cd8edba366691b27638c4de52c9f6390a59559","target":"record","created_at":"2026-05-18T00:31:11Z","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":"1e0372e992223ff78c0ceec976aba2eb603caa37849a9ba31c10a3253d4a663a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2017-10-13T14:24:07Z","title_canon_sha256":"681a6893c1f0f6eb462a55515da5729b2b535950e9e5b27100316c5eff979672"},"schema_version":"1.0","source":{"id":"1710.04938","kind":"arxiv","version":1}},"canonical_sha256":"67a249d2e6c843e46c8e9ea33c08450074a1dc202b7cec0c43dd5eca09e946fd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67a249d2e6c843e46c8e9ea33c08450074a1dc202b7cec0c43dd5eca09e946fd","first_computed_at":"2026-05-18T00:31:11.347063Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:11.347063Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xssK+UiclNQ/lVDEB7kzsMXkw2bFzgOVOb+br0JYNIIwRs8uHNvSFZldKpNDqhBhaK13JbIRFGwvFCmgwkCXAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:11.347807Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.04938","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e75306ebd690e7a00a111a2849cd8edba366691b27638c4de52c9f6390a59559","sha256:5571d367bd85f84f4662a9a0e0ee27d10cf5af53dd5a691664c636819304ae34"],"state_sha256":"4eb42d540851e0797e8e770466bb5ffab778be217307d4970382d7db5c8d9d99"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Xlt1Lp4af8GIdUp75kRRcSM+BdGrJmWdADV7MkGEVOfgKTGpjMUQG723EOqEiEUMJZffLrTJ1dlXZwkczP3CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T20:27:17.308223Z","bundle_sha256":"69c6a182f1e0df7f62f472becacc7c3d5a5ee43c294b526a718be315aa79821f"}}