{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:DM2YORGAA6QB62BZJDFZRUHDC2","short_pith_number":"pith:DM2YORGA","canonical_record":{"source":{"id":"1601.06177","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-01-22T21:37:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d440c8d5ece6cfe096a137a66e88e52ea41a78b3a25bb48c1a6c2f3e0bc62078","abstract_canon_sha256":"e6d9f1202623ace8fcf29c7dc976ca44a14211352a72cdf439138e22ca87b07a"},"schema_version":"1.0"},"canonical_sha256":"1b358744c007a01f683948cb98d0e3169afdb39039832c158a7fabecba02eda1","source":{"kind":"arxiv","id":"1601.06177","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06177","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06177v1","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06177","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"pith_short_12","alias_value":"DM2YORGAA6QB","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DM2YORGAA6QB62BZ","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DM2YORGA","created_at":"2026-05-18T12:30:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:DM2YORGAA6QB62BZJDFZRUHDC2","target":"record","payload":{"canonical_record":{"source":{"id":"1601.06177","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-01-22T21:37:11Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d440c8d5ece6cfe096a137a66e88e52ea41a78b3a25bb48c1a6c2f3e0bc62078","abstract_canon_sha256":"e6d9f1202623ace8fcf29c7dc976ca44a14211352a72cdf439138e22ca87b07a"},"schema_version":"1.0"},"canonical_sha256":"1b358744c007a01f683948cb98d0e3169afdb39039832c158a7fabecba02eda1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:01.191180Z","signature_b64":"/ny6v2h0IpvOzPcSHG+677A2Y0h4sRGL9+Iwp5wlcU1lZ5msTmF2aqa75QwLIYKD8bSXD9YO5Ue/S43iVKjLBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1b358744c007a01f683948cb98d0e3169afdb39039832c158a7fabecba02eda1","last_reissued_at":"2026-05-18T01:19:01.190765Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:01.190765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1601.06177","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":"2026-05-18T01:19:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Am+L5vhy2hPo/nSUy5/xtY4ypfynD3k/ZLb7BoevmZFcwJtUEc7LzwgzYP5Eb5038BNvbyYcxmA9s34JFhUbAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:04:15.001590Z"},"content_sha256":"75b6a00f5e0a28958c0c0fff826b263f3ef2f6436451d24b2e40f69ffd310582","schema_version":"1.0","event_id":"sha256:75b6a00f5e0a28958c0c0fff826b263f3ef2f6436451d24b2e40f69ffd310582"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:DM2YORGAA6QB62BZJDFZRUHDC2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Importance of Wide-field Foreground Removal for 21 cm Cosmology: A Demonstration With Early MWA Epoch of Reionization Observations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.IM","authors_text":"A. A. Deshpande, A. de Oliveira-Costa, A. E. E. Rogers, A. Loeb, A. M. Ewall-Wice, A. P. Beardsley, A. R. Neben, A. R. Offringa, A. Roshi, A. R. Whitney, A. Williams, B. E. Corey, B. J. Hazelton, B. McKinley, B. Pindor, C. J. Lonsdale, C. L. Williams, C. M. Trott, D. A. Mitchell, D. C. Jacobs, D. Emrich, D. L. Kaplan, D. Oberoi, E. Kratzenberg, E. Lenc, E. Morgan, F. Briggs, G. Bernardi, Han-Seek Kim, I. S. Sullivan, J. C. Kasper, J. C. Pober, J. D. Bowman, J. Line, J. N. Hewitt, Joshua. S. Dillon, J. Riding, J. S. B. Wyithe, K. S. Srivani, L. Feng, L. Hindson, L. J. Greenhill, M. E. Bell, M. F. Morales, M. J. Lynch, M. Johnston-Hollitt, M. Tegmark, M. Waterson, N. A. Barry, N. D. R. Bhat, N. Hurley-Walker, Nithyanandan Thyagarajan, N. Kudryavtseva, N. Udaya Shankar, P. Carroll, P. Kittiwisit, P. Procopio, R. B. Wayth, R. Goeke, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, Shiv K. Sethi, S. J. Tingay, S. M. Ord, Sourabh Paul, S. R. McWhirter, T. Prabu, Z. E. Martinot","submitted_at":"2016-01-22T21:37:11Z","abstract_excerpt":"In this paper we present observations, simulations, and analysis demonstrating the direct connection between the location of foreground emission on the sky and its location in cosmological power spectra from interferometric redshifted 21 cm experiments. We begin with a heuristic formalism for understanding the mapping of sky coordinates into the cylindrically averaged power spectra measurements used by 21 cm experiments, with a focus on the effects of the instrument beam response and the associated sidelobes. We then demonstrate this mapping by analyzing power spectra with both simulated and o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06177","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":"2026-05-18T01:19:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ev/VEuMQvC7pVF3xF9NOYgK6hCoFu2xwC53Z1iGSrx0tw/+dQJnvwp6U54NTBm5VEovAZYzJsiGfxSrlDg46Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-23T06:04:15.002148Z"},"content_sha256":"bcf755a819b4ad69ac4524804a3f360a96758f3d0fe38f6b6e25100752e64b51","schema_version":"1.0","event_id":"sha256:bcf755a819b4ad69ac4524804a3f360a96758f3d0fe38f6b6e25100752e64b51"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DM2YORGAA6QB62BZJDFZRUHDC2/bundle.json","state_url":"https://pith.science/pith/DM2YORGAA6QB62BZJDFZRUHDC2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DM2YORGAA6QB62BZJDFZRUHDC2/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":"2026-05-23T06:04:15Z","links":{"resolver":"https://pith.science/pith/DM2YORGAA6QB62BZJDFZRUHDC2","bundle":"https://pith.science/pith/DM2YORGAA6QB62BZJDFZRUHDC2/bundle.json","state":"https://pith.science/pith/DM2YORGAA6QB62BZJDFZRUHDC2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DM2YORGAA6QB62BZJDFZRUHDC2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:DM2YORGAA6QB62BZJDFZRUHDC2","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":"e6d9f1202623ace8fcf29c7dc976ca44a14211352a72cdf439138e22ca87b07a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-01-22T21:37:11Z","title_canon_sha256":"d440c8d5ece6cfe096a137a66e88e52ea41a78b3a25bb48c1a6c2f3e0bc62078"},"schema_version":"1.0","source":{"id":"1601.06177","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1601.06177","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"arxiv_version","alias_value":"1601.06177v1","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1601.06177","created_at":"2026-05-18T01:19:01Z"},{"alias_kind":"pith_short_12","alias_value":"DM2YORGAA6QB","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_16","alias_value":"DM2YORGAA6QB62BZ","created_at":"2026-05-18T12:30:12Z"},{"alias_kind":"pith_short_8","alias_value":"DM2YORGA","created_at":"2026-05-18T12:30:12Z"}],"graph_snapshots":[{"event_id":"sha256:bcf755a819b4ad69ac4524804a3f360a96758f3d0fe38f6b6e25100752e64b51","target":"graph","created_at":"2026-05-18T01:19:01Z","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":"In this paper we present observations, simulations, and analysis demonstrating the direct connection between the location of foreground emission on the sky and its location in cosmological power spectra from interferometric redshifted 21 cm experiments. We begin with a heuristic formalism for understanding the mapping of sky coordinates into the cylindrically averaged power spectra measurements used by 21 cm experiments, with a focus on the effects of the instrument beam response and the associated sidelobes. We then demonstrate this mapping by analyzing power spectra with both simulated and o","authors_text":"A. A. Deshpande, A. de Oliveira-Costa, A. E. E. Rogers, A. Loeb, A. M. Ewall-Wice, A. P. Beardsley, A. R. Neben, A. R. Offringa, A. Roshi, A. R. Whitney, A. Williams, B. E. Corey, B. J. Hazelton, B. McKinley, B. Pindor, C. J. Lonsdale, C. L. Williams, C. M. Trott, D. A. Mitchell, D. C. Jacobs, D. Emrich, D. L. Kaplan, D. Oberoi, E. Kratzenberg, E. Lenc, E. Morgan, F. Briggs, G. Bernardi, Han-Seek Kim, I. S. Sullivan, J. C. Kasper, J. C. Pober, J. D. Bowman, J. Line, J. N. Hewitt, Joshua. S. Dillon, J. Riding, J. S. B. Wyithe, K. S. Srivani, L. Feng, L. Hindson, L. J. Greenhill, M. E. Bell, M. F. Morales, M. J. Lynch, M. Johnston-Hollitt, M. Tegmark, M. Waterson, N. A. Barry, N. D. R. Bhat, N. Hurley-Walker, Nithyanandan Thyagarajan, N. Kudryavtseva, N. Udaya Shankar, P. Carroll, P. Kittiwisit, P. Procopio, R. B. Wayth, R. Goeke, R. J. Cappallo, R. L. Webster, R. Subrahmanyan, Shiv K. Sethi, S. J. Tingay, S. M. Ord, Sourabh Paul, S. R. McWhirter, T. Prabu, Z. E. Martinot","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-01-22T21:37:11Z","title":"The Importance of Wide-field Foreground Removal for 21 cm Cosmology: A Demonstration With Early MWA Epoch of Reionization Observations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.06177","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":"sha256:75b6a00f5e0a28958c0c0fff826b263f3ef2f6436451d24b2e40f69ffd310582","target":"record","created_at":"2026-05-18T01:19:01Z","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":"e6d9f1202623ace8fcf29c7dc976ca44a14211352a72cdf439138e22ca87b07a","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2016-01-22T21:37:11Z","title_canon_sha256":"d440c8d5ece6cfe096a137a66e88e52ea41a78b3a25bb48c1a6c2f3e0bc62078"},"schema_version":"1.0","source":{"id":"1601.06177","kind":"arxiv","version":1}},"canonical_sha256":"1b358744c007a01f683948cb98d0e3169afdb39039832c158a7fabecba02eda1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1b358744c007a01f683948cb98d0e3169afdb39039832c158a7fabecba02eda1","first_computed_at":"2026-05-18T01:19:01.190765Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:19:01.190765Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/ny6v2h0IpvOzPcSHG+677A2Y0h4sRGL9+Iwp5wlcU1lZ5msTmF2aqa75QwLIYKD8bSXD9YO5Ue/S43iVKjLBw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:19:01.191180Z","signed_message":"canonical_sha256_bytes"},"source_id":"1601.06177","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75b6a00f5e0a28958c0c0fff826b263f3ef2f6436451d24b2e40f69ffd310582","sha256:bcf755a819b4ad69ac4524804a3f360a96758f3d0fe38f6b6e25100752e64b51"],"state_sha256":"e74c48997a9efe6189eb406645c532823f20b0103657dded51573812c5346ecf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GLsv/bEKN9aoBNQNAcglAfUHO/x1YJI/ql4FpuIayXPlemheUJo7rHjI6+BzQbY7hdufb4ZywRjU/jFGP3NDDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-23T06:04:15.005600Z","bundle_sha256":"4ec928c74808101c1c9a2a7a42b94a2f966a215cfe57f0df6ef189e1c7476e82"}}