{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:H5R7YPO2HCREHI2N7RZFSXMA75","short_pith_number":"pith:H5R7YPO2","canonical_record":{"source":{"id":"2011.08695","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-11-17T15:24:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e0ceb3e1c03bcce12e70b329c350e15f4543c30a4f89eaffd00a9964bd3e4bca","abstract_canon_sha256":"a95b8d262405daa12e70d3bdeca3403ded688f78966f558cb43f5948989c1bb9"},"schema_version":"1.0"},"canonical_sha256":"3f63fc3dda38a243a34dfc72595d80ff71546f3d2f490372e9d4634c78f82e1c","source":{"kind":"arxiv","id":"2011.08695","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.08695","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.08695v1","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.08695","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_12","alias_value":"H5R7YPO2HCRE","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_16","alias_value":"H5R7YPO2HCREHI2N","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_8","alias_value":"H5R7YPO2","created_at":"2026-07-05T01:52:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:H5R7YPO2HCREHI2N7RZFSXMA75","target":"record","payload":{"canonical_record":{"source":{"id":"2011.08695","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-11-17T15:24:04Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"e0ceb3e1c03bcce12e70b329c350e15f4543c30a4f89eaffd00a9964bd3e4bca","abstract_canon_sha256":"a95b8d262405daa12e70d3bdeca3403ded688f78966f558cb43f5948989c1bb9"},"schema_version":"1.0"},"canonical_sha256":"3f63fc3dda38a243a34dfc72595d80ff71546f3d2f490372e9d4634c78f82e1c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:52:07.964020Z","signature_b64":"2YnuQsPv2LS81mmvDhJxKs+V+JG2M+2z3Z85s60BRWrytNXj1UEgq4l1aDQJ7WarlL08W/MDs6jVN8px7S64Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3f63fc3dda38a243a34dfc72595d80ff71546f3d2f490372e9d4634c78f82e1c","last_reissued_at":"2026-07-05T01:52:07.963638Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:52:07.963638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2011.08695","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":"2026-07-05T01:52:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SPNe7Bmm6Q/xrGo5IZf7dy0CBpCsIUEPXIGvK5Zp+AtplJccd4G/tSXW/bnTsU/VbJTDg64Av7mFqjybUzwIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T09:41:37.909105Z"},"content_sha256":"a8ecd90d4cb3e54ba74d8e847d1ebf87e63f07259921f9095209001b5336076f","schema_version":"1.0","event_id":"sha256:a8ecd90d4cb3e54ba74d8e847d1ebf87e63f07259921f9095209001b5336076f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:H5R7YPO2HCREHI2N7RZFSXMA75","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Baryon Mapping Experiment (BMX), a 21cm intensity mapping pathfinder","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Annie Polish, An\\v{z}e Slosar, Benjamin Saliwanchik, Christopher Sheehy, Emily Kuhn, Gregory Troiani, John Kuczewski, Justine Haupt, Laura Newburgh, Maile Harris, Paul O'Connor, Paul Stankus, Will Tyndall","submitted_at":"2020-11-17T15:24:04Z","abstract_excerpt":"The Baryon Mapping eXperiment (BMX) is an interferometric array designed as a pathfinder for a future post-reionization 21 cm intensity mapping survey. It consists of four 4-meter parabolic reflectors each having offset pyramidal horn feed, quad-ridge orthomode transducer, temperature-stabilized RF amplification and filtering, and pulsed noise injection diode. An undersampling readout scheme uses 8-bit digitizers running at 1.1 Gsamples/sec to provide access to signals from 1.1 - 1.55 GHz (third Nyquist zone), corresponding to HI emission from sources at redshift $0 < z < 0.3$. An FX correlato"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.08695","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2011.08695/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T01:52:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NdTaxk6Qcl+RNckTLNvWpl3lojoFgCtKsKMpy2mze5GTKRIYU/th6qC5dJUVga/d7PJglNwuo4zabD8l17FiCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T09:41:37.910091Z"},"content_sha256":"3c3d1e9478a8ce83102004a1976b99ef90d335146b8cdb8e682811b80e5ed79a","schema_version":"1.0","event_id":"sha256:3c3d1e9478a8ce83102004a1976b99ef90d335146b8cdb8e682811b80e5ed79a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H5R7YPO2HCREHI2N7RZFSXMA75/bundle.json","state_url":"https://pith.science/pith/H5R7YPO2HCREHI2N7RZFSXMA75/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H5R7YPO2HCREHI2N7RZFSXMA75/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":"2026-08-14T09:41:37Z","links":{"resolver":"https://pith.science/pith/H5R7YPO2HCREHI2N7RZFSXMA75","bundle":"https://pith.science/pith/H5R7YPO2HCREHI2N7RZFSXMA75/bundle.json","state":"https://pith.science/pith/H5R7YPO2HCREHI2N7RZFSXMA75/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H5R7YPO2HCREHI2N7RZFSXMA75/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:H5R7YPO2HCREHI2N7RZFSXMA75","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":"a95b8d262405daa12e70d3bdeca3403ded688f78966f558cb43f5948989c1bb9","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-11-17T15:24:04Z","title_canon_sha256":"e0ceb3e1c03bcce12e70b329c350e15f4543c30a4f89eaffd00a9964bd3e4bca"},"schema_version":"1.0","source":{"id":"2011.08695","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.08695","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"arxiv_version","alias_value":"2011.08695v1","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.08695","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_12","alias_value":"H5R7YPO2HCRE","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_16","alias_value":"H5R7YPO2HCREHI2N","created_at":"2026-07-05T01:52:07Z"},{"alias_kind":"pith_short_8","alias_value":"H5R7YPO2","created_at":"2026-07-05T01:52:07Z"}],"graph_snapshots":[{"event_id":"sha256:3c3d1e9478a8ce83102004a1976b99ef90d335146b8cdb8e682811b80e5ed79a","target":"graph","created_at":"2026-07-05T01:52:07Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2011.08695/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The Baryon Mapping eXperiment (BMX) is an interferometric array designed as a pathfinder for a future post-reionization 21 cm intensity mapping survey. It consists of four 4-meter parabolic reflectors each having offset pyramidal horn feed, quad-ridge orthomode transducer, temperature-stabilized RF amplification and filtering, and pulsed noise injection diode. An undersampling readout scheme uses 8-bit digitizers running at 1.1 Gsamples/sec to provide access to signals from 1.1 - 1.55 GHz (third Nyquist zone), corresponding to HI emission from sources at redshift $0 < z < 0.3$. An FX correlato","authors_text":"Annie Polish, An\\v{z}e Slosar, Benjamin Saliwanchik, Christopher Sheehy, Emily Kuhn, Gregory Troiani, John Kuczewski, Justine Haupt, Laura Newburgh, Maile Harris, Paul O'Connor, Paul Stankus, Will Tyndall","cross_cats":["astro-ph.GA"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-11-17T15:24:04Z","title":"The Baryon Mapping Experiment (BMX), a 21cm intensity mapping pathfinder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.08695","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:a8ecd90d4cb3e54ba74d8e847d1ebf87e63f07259921f9095209001b5336076f","target":"record","created_at":"2026-07-05T01:52:07Z","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":"a95b8d262405daa12e70d3bdeca3403ded688f78966f558cb43f5948989c1bb9","cross_cats_sorted":["astro-ph.GA"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.IM","submitted_at":"2020-11-17T15:24:04Z","title_canon_sha256":"e0ceb3e1c03bcce12e70b329c350e15f4543c30a4f89eaffd00a9964bd3e4bca"},"schema_version":"1.0","source":{"id":"2011.08695","kind":"arxiv","version":1}},"canonical_sha256":"3f63fc3dda38a243a34dfc72595d80ff71546f3d2f490372e9d4634c78f82e1c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3f63fc3dda38a243a34dfc72595d80ff71546f3d2f490372e9d4634c78f82e1c","first_computed_at":"2026-07-05T01:52:07.963638Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:52:07.963638Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2YnuQsPv2LS81mmvDhJxKs+V+JG2M+2z3Z85s60BRWrytNXj1UEgq4l1aDQJ7WarlL08W/MDs6jVN8px7S64Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:52:07.964020Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.08695","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a8ecd90d4cb3e54ba74d8e847d1ebf87e63f07259921f9095209001b5336076f","sha256:3c3d1e9478a8ce83102004a1976b99ef90d335146b8cdb8e682811b80e5ed79a"],"state_sha256":"61ffc314731f16baa840891e711c4b06452e5095cf8b25874661b8292b34fae9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k5FW27IMgXvT7NK03skLEtEGTlJbcGKYqxG+SeNgTz8BmlMH8iuBK5pPcVPBjQm42o0eJ/rflPSSL2QUgOfGCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T09:41:37.977963Z","bundle_sha256":"226bb3d7e89a6d7c24dfb7eaabb25d1755bc1e08baec2b21842fa5f12e24c27e"}}