{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:IMZQOQ5KLHACLV6YWOMJPMDFJO","short_pith_number":"pith:IMZQOQ5K","schema_version":"1.0","canonical_sha256":"43330743aa59c025d7d8b39897b0654bbede3718b8a37f350614313d4a983e21","source":{"kind":"arxiv","id":"1802.06914","version":1},"attestation_state":"computed","paper":{"title":"A Binary Offset Effect in CCD Readout and Its Impact on Astronomical Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"E. Gangler, E. Pecontal, G. Aldering, K. Boone, R. S. Domagalski, S. Dixon, S. Perlmutter, Y. Copin","submitted_at":"2018-02-20T00:01:19Z","abstract_excerpt":"We have discovered an anomalous behavior of CCD readout electronics that affects their use in many astronomical applications. An offset in the digitization of the CCD output voltage that depends on the binary encoding of one pixel is added to pixels that are read out one, two and/or three pixels later. One result of this effect is the introduction of a differential offset in the background when comparing regions with and without flux from science targets. Conventional data reduction methods do not correct for this offset. We find this effect in 16 of 22 instruments investigated, covering a var"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1802.06914","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2018-02-20T00:01:19Z","cross_cats_sorted":["physics.ins-det"],"title_canon_sha256":"5e444291a515d38333dc75642541af321702ac506c0f23f066e241fb21ed810d","abstract_canon_sha256":"f85496e819826390963cef297c192368a22ef8383b660786f452200846ac3921"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:15:15.985990Z","signature_b64":"a693e6bZM9Xf1syK0RJPohMo14GQiY8fKmB+We0XO0NCS2QA9Ltqv5SM0mAisHlipkFxIdhXHVKVIwBFzfmeBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"43330743aa59c025d7d8b39897b0654bbede3718b8a37f350614313d4a983e21","last_reissued_at":"2026-05-18T00:15:15.985274Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:15:15.985274Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A Binary Offset Effect in CCD Readout and Its Impact on Astronomical Data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"astro-ph.IM","authors_text":"E. Gangler, E. Pecontal, G. Aldering, K. Boone, R. S. Domagalski, S. Dixon, S. Perlmutter, Y. Copin","submitted_at":"2018-02-20T00:01:19Z","abstract_excerpt":"We have discovered an anomalous behavior of CCD readout electronics that affects their use in many astronomical applications. An offset in the digitization of the CCD output voltage that depends on the binary encoding of one pixel is added to pixels that are read out one, two and/or three pixels later. One result of this effect is the introduction of a differential offset in the background when comparing regions with and without flux from science targets. Conventional data reduction methods do not correct for this offset. We find this effect in 16 of 22 instruments investigated, covering a var"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06914","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1802.06914","created_at":"2026-05-18T00:15:15.985369+00:00"},{"alias_kind":"arxiv_version","alias_value":"1802.06914v1","created_at":"2026-05-18T00:15:15.985369+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06914","created_at":"2026-05-18T00:15:15.985369+00:00"},{"alias_kind":"pith_short_12","alias_value":"IMZQOQ5KLHAC","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_16","alias_value":"IMZQOQ5KLHACLV6Y","created_at":"2026-05-18T12:32:31.084164+00:00"},{"alias_kind":"pith_short_8","alias_value":"IMZQOQ5K","created_at":"2026-05-18T12:32:31.084164+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO","json":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO.json","graph_json":"https://pith.science/api/pith-number/IMZQOQ5KLHACLV6YWOMJPMDFJO/graph.json","events_json":"https://pith.science/api/pith-number/IMZQOQ5KLHACLV6YWOMJPMDFJO/events.json","paper":"https://pith.science/paper/IMZQOQ5K"},"agent_actions":{"view_html":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO","download_json":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO.json","view_paper":"https://pith.science/paper/IMZQOQ5K","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1802.06914&json=true","fetch_graph":"https://pith.science/api/pith-number/IMZQOQ5KLHACLV6YWOMJPMDFJO/graph.json","fetch_events":"https://pith.science/api/pith-number/IMZQOQ5KLHACLV6YWOMJPMDFJO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO/action/storage_attestation","attest_author":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO/action/author_attestation","sign_citation":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO/action/citation_signature","submit_replication":"https://pith.science/pith/IMZQOQ5KLHACLV6YWOMJPMDFJO/action/replication_record"}},"created_at":"2026-05-18T00:15:15.985369+00:00","updated_at":"2026-05-18T00:15:15.985369+00:00"}