{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:C6IHJX3SURANKUZ75V6HG4OQSW","short_pith_number":"pith:C6IHJX3S","canonical_record":{"source":{"id":"1908.02383","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-06T22:09:41Z","cross_cats_sorted":[],"title_canon_sha256":"927c42054ed8a09d79b4fe5c192941718d33fcee96789cc69cd4b455b1b45cfe","abstract_canon_sha256":"3e65c97531f0c4fc4405308dd454a015e12f8fd3a277a0f382dab23d7a70b51f"},"schema_version":"1.0"},"canonical_sha256":"179074df72a440d5533fed7c7371d09586cbe2f127dbaedcaa6f8c8a899036e4","source":{"kind":"arxiv","id":"1908.02383","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02383","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02383v2","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02383","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_12","alias_value":"C6IHJX3SURAN","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_16","alias_value":"C6IHJX3SURANKUZ7","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_8","alias_value":"C6IHJX3S","created_at":"2026-07-05T01:46:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:C6IHJX3SURANKUZ75V6HG4OQSW","target":"record","payload":{"canonical_record":{"source":{"id":"1908.02383","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-06T22:09:41Z","cross_cats_sorted":[],"title_canon_sha256":"927c42054ed8a09d79b4fe5c192941718d33fcee96789cc69cd4b455b1b45cfe","abstract_canon_sha256":"3e65c97531f0c4fc4405308dd454a015e12f8fd3a277a0f382dab23d7a70b51f"},"schema_version":"1.0"},"canonical_sha256":"179074df72a440d5533fed7c7371d09586cbe2f127dbaedcaa6f8c8a899036e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:46:42.675936Z","signature_b64":"+HclJGgzfA3c208zMuhYeOgpbfwid/SOYq3MH97nDi+NihNMnC90YDy8fGLv/jwx0+7b03QZ023A5jzYdDxXBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"179074df72a440d5533fed7c7371d09586cbe2f127dbaedcaa6f8c8a899036e4","last_reissued_at":"2026-07-05T01:46:42.675501Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:46:42.675501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.02383","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":"2026-07-05T01:46:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wknNDquqNFp3OPuFsVSUHZD/LYW4ZonZF9Bsq0ddcgmiE+MniQCsy15am6KQQTTdFPSxFI6YdXLeUxk4J/OpCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T19:37:43.032058Z"},"content_sha256":"a6c6001af98d946263db465ec9b6cf62712447229173ad6482f8303a925b959a","schema_version":"1.0","event_id":"sha256:a6c6001af98d946263db465ec9b6cf62712447229173ad6482f8303a925b959a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:C6IHJX3SURANKUZ75V6HG4OQSW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Understanding the HERA Phase I receiver system with simulations and its impact on the detectability of the EoR delay power spectrum","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"Aaron Ewall-Wice, Aaron R. Parsons, Abraham R. Neben, Adam Lanman, Adam P. Beardsley, Adrian Liu, Alec Josaitis, Andrei Mesinger, Angelo Syce, Austin Julius, Bojan Nikolic, Bradley Greig, Brian Glendenning, Bryna J. Hazelton, Carina Cheng, Chris L. Carilli, Craig Smith, Cresshim Malgas, Daniel C. Jacobs, David MacMahon, David R. DeBoer, Deepthi Gorthi, Eloy de Lera Acedo, Eunice Matsetela, Gianni Bernardi, Haoxuan Zheng (the HERA Collaboration), Honggeun Kim, Jack Hickish, Jacob Burba, Jacqueline N. Hewitt, James E. Aguirre, James Robnett, Jasper Grobbelaar, Jonathan C. Pober, Joshua Kerrigan, Joshua S. Dillon, Juan Mena Parra, Judd D. Bowman, Kathryn Rosie, Kingsley Gale-Sides, Lourence Malan, Mathakane Molewa, Matt Dexter, Matthew Kolopanis, Matthys Maree, Miguel F. Morales, Nicholas S. Kern, Nicolas Fagnoni, Nima Razavi-Ghods, Nipanjana Patra, Nithyanandan Thyagarajan, Paul Alexander, Paul La Plante, Peter K. G. Williams, Peter Sims, Phil Bull, Piyanat Kittiwisit, Randall Fritz, Richard F. Bradley, Samantha Pieterse, Saul A. Kohn, Steve R. Furlanetto, Tashalee S. Billings, Telalo Lekalake, Tshegofalang Mosiane, Yanga Balfour, Zachary E. Martinot, Zaki S. Ali, Zara Abdurashidova, Ziyaad Halday","submitted_at":"2019-08-06T22:09:41Z","abstract_excerpt":"The detection of the Epoch of Reionization (EoR) delay power spectrum using a \"foreground avoidance method\" highly depends on the instrument chromaticity. The systematic effects induced by the radio-telescope spread the foreground signal in the delay domain, which contaminates the EoR window theoretically observable. Applied to the Hydrogen Epoch of Reionization Array (HERA), this paper combines detailed electromagnetic and electrical simulations in order to model the chromatic effects of the instrument, and quantify its frequency and time responses. In particular, the effects of the analogue "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02383","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.02383/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":"2026-07-05T01:46:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4VhsldgAqkduwVI+nZYHJ2X+08S2UPAJW1NETqa2NF3WSjHFGVxO1XRBQAhljgDM/fKTqTYj4Nf2M6KN1g36CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T19:37:43.033035Z"},"content_sha256":"9034b5d31c3f7d3f50bccb42eded07a90ea65a953ed77477fbc84ee35f744e82","schema_version":"1.0","event_id":"sha256:9034b5d31c3f7d3f50bccb42eded07a90ea65a953ed77477fbc84ee35f744e82"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C6IHJX3SURANKUZ75V6HG4OQSW/bundle.json","state_url":"https://pith.science/pith/C6IHJX3SURANKUZ75V6HG4OQSW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C6IHJX3SURANKUZ75V6HG4OQSW/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":"2026-08-10T19:37:43Z","links":{"resolver":"https://pith.science/pith/C6IHJX3SURANKUZ75V6HG4OQSW","bundle":"https://pith.science/pith/C6IHJX3SURANKUZ75V6HG4OQSW/bundle.json","state":"https://pith.science/pith/C6IHJX3SURANKUZ75V6HG4OQSW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C6IHJX3SURANKUZ75V6HG4OQSW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:C6IHJX3SURANKUZ75V6HG4OQSW","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":"3e65c97531f0c4fc4405308dd454a015e12f8fd3a277a0f382dab23d7a70b51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-06T22:09:41Z","title_canon_sha256":"927c42054ed8a09d79b4fe5c192941718d33fcee96789cc69cd4b455b1b45cfe"},"schema_version":"1.0","source":{"id":"1908.02383","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02383","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02383v2","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02383","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_12","alias_value":"C6IHJX3SURAN","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_16","alias_value":"C6IHJX3SURANKUZ7","created_at":"2026-07-05T01:46:42Z"},{"alias_kind":"pith_short_8","alias_value":"C6IHJX3S","created_at":"2026-07-05T01:46:42Z"}],"graph_snapshots":[{"event_id":"sha256:9034b5d31c3f7d3f50bccb42eded07a90ea65a953ed77477fbc84ee35f744e82","target":"graph","created_at":"2026-07-05T01:46:42Z","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/1908.02383/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The detection of the Epoch of Reionization (EoR) delay power spectrum using a \"foreground avoidance method\" highly depends on the instrument chromaticity. The systematic effects induced by the radio-telescope spread the foreground signal in the delay domain, which contaminates the EoR window theoretically observable. Applied to the Hydrogen Epoch of Reionization Array (HERA), this paper combines detailed electromagnetic and electrical simulations in order to model the chromatic effects of the instrument, and quantify its frequency and time responses. In particular, the effects of the analogue ","authors_text":"Aaron Ewall-Wice, Aaron R. Parsons, Abraham R. Neben, Adam Lanman, Adam P. Beardsley, Adrian Liu, Alec Josaitis, Andrei Mesinger, Angelo Syce, Austin Julius, Bojan Nikolic, Bradley Greig, Brian Glendenning, Bryna J. Hazelton, Carina Cheng, Chris L. Carilli, Craig Smith, Cresshim Malgas, Daniel C. Jacobs, David MacMahon, David R. DeBoer, Deepthi Gorthi, Eloy de Lera Acedo, Eunice Matsetela, Gianni Bernardi, Haoxuan Zheng (the HERA Collaboration), Honggeun Kim, Jack Hickish, Jacob Burba, Jacqueline N. Hewitt, James E. Aguirre, James Robnett, Jasper Grobbelaar, Jonathan C. Pober, Joshua Kerrigan, Joshua S. Dillon, Juan Mena Parra, Judd D. Bowman, Kathryn Rosie, Kingsley Gale-Sides, Lourence Malan, Mathakane Molewa, Matt Dexter, Matthew Kolopanis, Matthys Maree, Miguel F. Morales, Nicholas S. Kern, Nicolas Fagnoni, Nima Razavi-Ghods, Nipanjana Patra, Nithyanandan Thyagarajan, Paul Alexander, Paul La Plante, Peter K. G. Williams, Peter Sims, Phil Bull, Piyanat Kittiwisit, Randall Fritz, Richard F. Bradley, Samantha Pieterse, Saul A. Kohn, Steve R. Furlanetto, Tashalee S. Billings, Telalo Lekalake, Tshegofalang Mosiane, Yanga Balfour, Zachary E. Martinot, Zaki S. Ali, Zara Abdurashidova, Ziyaad Halday","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-06T22:09:41Z","title":"Understanding the HERA Phase I receiver system with simulations and its impact on the detectability of the EoR delay power spectrum"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02383","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:a6c6001af98d946263db465ec9b6cf62712447229173ad6482f8303a925b959a","target":"record","created_at":"2026-07-05T01:46:42Z","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":"3e65c97531f0c4fc4405308dd454a015e12f8fd3a277a0f382dab23d7a70b51f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-08-06T22:09:41Z","title_canon_sha256":"927c42054ed8a09d79b4fe5c192941718d33fcee96789cc69cd4b455b1b45cfe"},"schema_version":"1.0","source":{"id":"1908.02383","kind":"arxiv","version":2}},"canonical_sha256":"179074df72a440d5533fed7c7371d09586cbe2f127dbaedcaa6f8c8a899036e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"179074df72a440d5533fed7c7371d09586cbe2f127dbaedcaa6f8c8a899036e4","first_computed_at":"2026-07-05T01:46:42.675501Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:46:42.675501Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+HclJGgzfA3c208zMuhYeOgpbfwid/SOYq3MH97nDi+NihNMnC90YDy8fGLv/jwx0+7b03QZ023A5jzYdDxXBw==","signature_status":"signed_v1","signed_at":"2026-07-05T01:46:42.675936Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.02383","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6c6001af98d946263db465ec9b6cf62712447229173ad6482f8303a925b959a","sha256:9034b5d31c3f7d3f50bccb42eded07a90ea65a953ed77477fbc84ee35f744e82"],"state_sha256":"bb3f20a4c3161370b5096b7953228888963eed83cdf1ea50a9c54e5ca1e76366"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dLYcCcQVfvXbpKT3mAXpqi4DusxuY7//+pzirv52vRgltm0+YMSki1fuWGeofJrwremZtZ2WqU9oHpjuIWaQAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T19:37:43.046948Z","bundle_sha256":"e83b5905989dcbe169855cbf89982f90a2e87d88a58a1d0e4ab6e259a85064ce"}}