{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:NQSQAGI5AUZVJPEE77TDXSZTWN","short_pith_number":"pith:NQSQAGI5","canonical_record":{"source":{"id":"1707.04109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-13T13:19:04Z","cross_cats_sorted":[],"title_canon_sha256":"75ac84a939e5eee6d1481a2a9280a48f4b575fd1521f8610694c398db6545b95","abstract_canon_sha256":"f2bc6f63dcddd91af88d4ec027e9df4509ae3f8abee94ebb2baf32e2052c0a71"},"schema_version":"1.0"},"canonical_sha256":"6c2500191d053354bc84ffe63bcb33b35733d714f43efa417a5ace7ebb18516b","source":{"kind":"arxiv","id":"1707.04109","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.04109","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"arxiv_version","alias_value":"1707.04109v2","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.04109","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"pith_short_12","alias_value":"NQSQAGI5AUZV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NQSQAGI5AUZVJPEE","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NQSQAGI5","created_at":"2026-05-18T12:31:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:NQSQAGI5AUZVJPEE77TDXSZTWN","target":"record","payload":{"canonical_record":{"source":{"id":"1707.04109","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-13T13:19:04Z","cross_cats_sorted":[],"title_canon_sha256":"75ac84a939e5eee6d1481a2a9280a48f4b575fd1521f8610694c398db6545b95","abstract_canon_sha256":"f2bc6f63dcddd91af88d4ec027e9df4509ae3f8abee94ebb2baf32e2052c0a71"},"schema_version":"1.0"},"canonical_sha256":"6c2500191d053354bc84ffe63bcb33b35733d714f43efa417a5ace7ebb18516b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:32:42.195786Z","signature_b64":"Xxz6zWUdoyxwfKZ5pTQXn06ycC1pvq2QOvfiAsH6d9owzIsIRj16gadURCOLs4KtcnEKp5410t+ZnpJzvKWJDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6c2500191d053354bc84ffe63bcb33b35733d714f43efa417a5ace7ebb18516b","last_reissued_at":"2026-05-18T00:32:42.195069Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:32:42.195069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1707.04109","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":"2026-05-18T00:32:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9DyIXcBTN6f417y2VmZ/vQS1hSyng1qfoaixaquHOUcxzjIWfU5cvKa14LP7X+jus/Ghq41mCZ8wwfpzgNTdCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:21:16.644140Z"},"content_sha256":"614b5ef6dcc5370bcb6340d81b75d1bde280a7f616f8be18c92463fe4aaef48a","schema_version":"1.0","event_id":"sha256:614b5ef6dcc5370bcb6340d81b75d1bde280a7f616f8be18c92463fe4aaef48a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:NQSQAGI5AUZVJPEE77TDXSZTWN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Constraining Polarized Foregrounds for EOR Experiments II: Polarization Leakage Simulations in the Avoidance Scheme","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.CO","authors_text":"A.R. Parsons, C.D. Nunhokee, G. Bernardi, G. Foster, J.E. Aguirre, J.S. Dillon, J.Z.E. Martinot, N. Thyagarajan, S.A. Kohn, T.L. Grobler","submitted_at":"2017-07-13T13:19:04Z","abstract_excerpt":"A critical challenge in the observation of the redshifted 21-cm line is its separation from bright Galactic and extragalactic foregrounds. In particular, the instrumental leakage of polarized foregrounds, which undergo significant Faraday rotation as they propagate through the interstellar medium, may harmfully contaminate the 21-cm power spectrum. We develop a formalism to describe the leakage due to instrumental widefield effects in visibility-based power spectra measured with redundant arrays, extending the delay-spectrum approach presented in Parsons et al. (2012). We construct polarized s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.04109","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":"2026-05-18T00:32:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UlQlJnlFxXwdxZriBAYrbZlF5TcHprTxgFm8eCD/R6+YlBb9BvDk5xoFzuepuLj7zF2tVGSMkQR+Smh2S+XaBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T13:21:16.644550Z"},"content_sha256":"efddcf32c707ef39ff17cbc75c185894489fc5f501a4e118f1a89a33762fb9d0","schema_version":"1.0","event_id":"sha256:efddcf32c707ef39ff17cbc75c185894489fc5f501a4e118f1a89a33762fb9d0"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/bundle.json","state_url":"https://pith.science/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/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":"2026-06-09T13:21:16Z","links":{"resolver":"https://pith.science/pith/NQSQAGI5AUZVJPEE77TDXSZTWN","bundle":"https://pith.science/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/bundle.json","state":"https://pith.science/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NQSQAGI5AUZVJPEE77TDXSZTWN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:NQSQAGI5AUZVJPEE77TDXSZTWN","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":"f2bc6f63dcddd91af88d4ec027e9df4509ae3f8abee94ebb2baf32e2052c0a71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-13T13:19:04Z","title_canon_sha256":"75ac84a939e5eee6d1481a2a9280a48f4b575fd1521f8610694c398db6545b95"},"schema_version":"1.0","source":{"id":"1707.04109","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1707.04109","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"arxiv_version","alias_value":"1707.04109v2","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1707.04109","created_at":"2026-05-18T00:32:42Z"},{"alias_kind":"pith_short_12","alias_value":"NQSQAGI5AUZV","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_16","alias_value":"NQSQAGI5AUZVJPEE","created_at":"2026-05-18T12:31:34Z"},{"alias_kind":"pith_short_8","alias_value":"NQSQAGI5","created_at":"2026-05-18T12:31:34Z"}],"graph_snapshots":[{"event_id":"sha256:efddcf32c707ef39ff17cbc75c185894489fc5f501a4e118f1a89a33762fb9d0","target":"graph","created_at":"2026-05-18T00:32:42Z","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"},"paper":{"abstract_excerpt":"A critical challenge in the observation of the redshifted 21-cm line is its separation from bright Galactic and extragalactic foregrounds. In particular, the instrumental leakage of polarized foregrounds, which undergo significant Faraday rotation as they propagate through the interstellar medium, may harmfully contaminate the 21-cm power spectrum. We develop a formalism to describe the leakage due to instrumental widefield effects in visibility-based power spectra measured with redundant arrays, extending the delay-spectrum approach presented in Parsons et al. (2012). We construct polarized s","authors_text":"A.R. Parsons, C.D. Nunhokee, G. Bernardi, G. Foster, J.E. Aguirre, J.S. Dillon, J.Z.E. Martinot, N. Thyagarajan, S.A. Kohn, T.L. Grobler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-13T13:19:04Z","title":"Constraining Polarized Foregrounds for EOR Experiments II: Polarization Leakage Simulations in the Avoidance Scheme"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1707.04109","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":"sha256:614b5ef6dcc5370bcb6340d81b75d1bde280a7f616f8be18c92463fe4aaef48a","target":"record","created_at":"2026-05-18T00:32:42Z","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":"f2bc6f63dcddd91af88d4ec027e9df4509ae3f8abee94ebb2baf32e2052c0a71","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.CO","submitted_at":"2017-07-13T13:19:04Z","title_canon_sha256":"75ac84a939e5eee6d1481a2a9280a48f4b575fd1521f8610694c398db6545b95"},"schema_version":"1.0","source":{"id":"1707.04109","kind":"arxiv","version":2}},"canonical_sha256":"6c2500191d053354bc84ffe63bcb33b35733d714f43efa417a5ace7ebb18516b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6c2500191d053354bc84ffe63bcb33b35733d714f43efa417a5ace7ebb18516b","first_computed_at":"2026-05-18T00:32:42.195069Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:32:42.195069Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Xxz6zWUdoyxwfKZ5pTQXn06ycC1pvq2QOvfiAsH6d9owzIsIRj16gadURCOLs4KtcnEKp5410t+ZnpJzvKWJDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:32:42.195786Z","signed_message":"canonical_sha256_bytes"},"source_id":"1707.04109","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:614b5ef6dcc5370bcb6340d81b75d1bde280a7f616f8be18c92463fe4aaef48a","sha256:efddcf32c707ef39ff17cbc75c185894489fc5f501a4e118f1a89a33762fb9d0"],"state_sha256":"570650eeb039511d8abd145c5c42ae21dcffefb742c52742560b8691c86c3227"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tzHQfdWopc5lErhrCxIhM/SL4qyuxqc6zAnaFoNdz7O24At1geVWLcW5ElVm0IXyFZ3gjQJjScvHD1LrXO5jBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T13:21:16.646769Z","bundle_sha256":"00ac88a997822014e2e6bc59334a4fa1258905f13e5f2c40963856d86b18b8e8"}}