{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:VYMELYDYX5OMOR3SKHF2HNYY6L","short_pith_number":"pith:VYMELYDY","canonical_record":{"source":{"id":"1603.08958","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-29T20:45:09Z","cross_cats_sorted":[],"title_canon_sha256":"8360c670f57cac2d3ae3c06f8419d605819721af043974f3fb41b8323efd4cb5","abstract_canon_sha256":"ecc73bb114be0659b993b9c58a006b3ebfc10a6d0d3b6fd3066207ef09d4041e"},"schema_version":"1.0"},"canonical_sha256":"ae1845e078bf5cc7477251cba3b718f2df438656d0a3bfa5f3c82b92228ea503","source":{"kind":"arxiv","id":"1603.08958","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08958","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08958v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08958","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"VYMELYDYX5OM","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VYMELYDYX5OMOR3S","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VYMELYDY","created_at":"2026-05-18T12:30:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:VYMELYDYX5OMOR3SKHF2HNYY6L","target":"record","payload":{"canonical_record":{"source":{"id":"1603.08958","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-29T20:45:09Z","cross_cats_sorted":[],"title_canon_sha256":"8360c670f57cac2d3ae3c06f8419d605819721af043974f3fb41b8323efd4cb5","abstract_canon_sha256":"ecc73bb114be0659b993b9c58a006b3ebfc10a6d0d3b6fd3066207ef09d4041e"},"schema_version":"1.0"},"canonical_sha256":"ae1845e078bf5cc7477251cba3b718f2df438656d0a3bfa5f3c82b92228ea503","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:11:31.213523Z","signature_b64":"DAOTaOA31c75ltiL9lx5uz/NgAQiwqA11w07rGLt4sudUiQnDg1F/hzgFFzjq817Hl1PkWH6nf8meSNf7Db/AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae1845e078bf5cc7477251cba3b718f2df438656d0a3bfa5f3c82b92228ea503","last_reissued_at":"2026-05-18T01:11:31.213061Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:11:31.213061Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1603.08958","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/bXSdUhdOLeM9DWXefegSw1uMhCSnKjIQhgEAL03vG4Jn2oRfkHW7CnUNnTxzqbzzB4k+l1O72xi/ZYcgwKhCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:22:12.507201Z"},"content_sha256":"03d6b2ba08a5e042c8fcfbfe15a82e6730ea624f3e66c9c73ee373b9a6f47b7b","schema_version":"1.0","event_id":"sha256:03d6b2ba08a5e042c8fcfbfe15a82e6730ea624f3e66c9c73ee373b9a6f47b7b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:VYMELYDYX5OMOR3SKHF2HNYY6L","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effects of Antenna Beam Chromaticity on Redshifted 21~cm Power Spectrum and Implications for Hydrogen Epoch of Reionization Array","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"Aaron Ewall-Wice, Aaron Parsons, Abraham Neben, David DeBoer, Judd Bowman, Nipanjana Patra, Nithyanandan Thyagarajan","submitted_at":"2016-03-29T20:45:09Z","abstract_excerpt":"Unaccounted for systematics from foregrounds and instruments can severely limit the sensitivity of current experiments from detecting redshifted 21~cm signals from the Epoch of Reionization (EoR). Upcoming experiments are faced with a challenge to deliver more collecting area per antenna element without degrading the data with systematics. This paper and its companions show that dishes are viable for achieving this balance using the Hydrogen Epoch of Reionization Array (HERA) as an example. Here, we specifically identify spectral systematics associated with the antenna power pattern as a signi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08958","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":"2026-05-18T01:11:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8giAh/kIrushH6PaGeC1+h0lHZQnh9CAO+DZGhEIndWT9JYMkR1H6GLY+bSkyoQjfAjRehh6K1p21RTF7CgwAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T16:22:12.507887Z"},"content_sha256":"39515a656b676bbfab7db177cfa8ca32ae8705a86f59166c1190af54f2f7762b","schema_version":"1.0","event_id":"sha256:39515a656b676bbfab7db177cfa8ca32ae8705a86f59166c1190af54f2f7762b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/bundle.json","state_url":"https://pith.science/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/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":"2026-05-27T16:22:12Z","links":{"resolver":"https://pith.science/pith/VYMELYDYX5OMOR3SKHF2HNYY6L","bundle":"https://pith.science/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/bundle.json","state":"https://pith.science/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VYMELYDYX5OMOR3SKHF2HNYY6L/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:VYMELYDYX5OMOR3SKHF2HNYY6L","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":"ecc73bb114be0659b993b9c58a006b3ebfc10a6d0d3b6fd3066207ef09d4041e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-29T20:45:09Z","title_canon_sha256":"8360c670f57cac2d3ae3c06f8419d605819721af043974f3fb41b8323efd4cb5"},"schema_version":"1.0","source":{"id":"1603.08958","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1603.08958","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"arxiv_version","alias_value":"1603.08958v1","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.08958","created_at":"2026-05-18T01:11:31Z"},{"alias_kind":"pith_short_12","alias_value":"VYMELYDYX5OM","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_16","alias_value":"VYMELYDYX5OMOR3S","created_at":"2026-05-18T12:30:48Z"},{"alias_kind":"pith_short_8","alias_value":"VYMELYDY","created_at":"2026-05-18T12:30:48Z"}],"graph_snapshots":[{"event_id":"sha256:39515a656b676bbfab7db177cfa8ca32ae8705a86f59166c1190af54f2f7762b","target":"graph","created_at":"2026-05-18T01:11:31Z","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":"Unaccounted for systematics from foregrounds and instruments can severely limit the sensitivity of current experiments from detecting redshifted 21~cm signals from the Epoch of Reionization (EoR). Upcoming experiments are faced with a challenge to deliver more collecting area per antenna element without degrading the data with systematics. This paper and its companions show that dishes are viable for achieving this balance using the Hydrogen Epoch of Reionization Array (HERA) as an example. Here, we specifically identify spectral systematics associated with the antenna power pattern as a signi","authors_text":"Aaron Ewall-Wice, Aaron Parsons, Abraham Neben, David DeBoer, Judd Bowman, Nipanjana Patra, Nithyanandan Thyagarajan","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-29T20:45:09Z","title":"Effects of Antenna Beam Chromaticity on Redshifted 21~cm Power Spectrum and Implications for Hydrogen Epoch of Reionization Array"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.08958","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":"sha256:03d6b2ba08a5e042c8fcfbfe15a82e6730ea624f3e66c9c73ee373b9a6f47b7b","target":"record","created_at":"2026-05-18T01:11:31Z","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":"ecc73bb114be0659b993b9c58a006b3ebfc10a6d0d3b6fd3066207ef09d4041e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2016-03-29T20:45:09Z","title_canon_sha256":"8360c670f57cac2d3ae3c06f8419d605819721af043974f3fb41b8323efd4cb5"},"schema_version":"1.0","source":{"id":"1603.08958","kind":"arxiv","version":1}},"canonical_sha256":"ae1845e078bf5cc7477251cba3b718f2df438656d0a3bfa5f3c82b92228ea503","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae1845e078bf5cc7477251cba3b718f2df438656d0a3bfa5f3c82b92228ea503","first_computed_at":"2026-05-18T01:11:31.213061Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:11:31.213061Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DAOTaOA31c75ltiL9lx5uz/NgAQiwqA11w07rGLt4sudUiQnDg1F/hzgFFzjq817Hl1PkWH6nf8meSNf7Db/AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:11:31.213523Z","signed_message":"canonical_sha256_bytes"},"source_id":"1603.08958","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:03d6b2ba08a5e042c8fcfbfe15a82e6730ea624f3e66c9c73ee373b9a6f47b7b","sha256:39515a656b676bbfab7db177cfa8ca32ae8705a86f59166c1190af54f2f7762b"],"state_sha256":"05fa0017a7680158529a7aa876c8acd978c5d86fb7ddec7e2e355ea629401443"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ptoaWdImjPOa/Mh75o6jG4hwq8Ji2m7/gTRcdiFcjH8wTIkt3WEowpLkJFfEa9nj7wj6E2Zyx+BFudJd9ZJbBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T16:22:12.511388Z","bundle_sha256":"56fce7b43232e7915747506164590937778e214d0e378e798c442788f7ae3275"}}