{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:DGD3FZHEFWJ2XUWXUOEATME2B7","short_pith_number":"pith:DGD3FZHE","canonical_record":{"source":{"id":"1311.6467","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-25T21:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"7ab3dc31586e5e56a48f096aa658d5241bd9cc5b9938767bc868fce9f0c80d18","abstract_canon_sha256":"bf1a638994c20fccd866ca06bc14ea72af8a1ce044918e785930859e6b48f2ea"},"schema_version":"1.0"},"canonical_sha256":"1987b2e4e42d93abd2d7a38809b09a0ffc6c49928489983401f70f6d02374974","source":{"kind":"arxiv","id":"1311.6467","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6467","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6467v1","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6467","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"DGD3FZHEFWJ2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DGD3FZHEFWJ2XUWX","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DGD3FZHE","created_at":"2026-05-18T12:27:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:DGD3FZHEFWJ2XUWXUOEATME2B7","target":"record","payload":{"canonical_record":{"source":{"id":"1311.6467","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-25T21:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"7ab3dc31586e5e56a48f096aa658d5241bd9cc5b9938767bc868fce9f0c80d18","abstract_canon_sha256":"bf1a638994c20fccd866ca06bc14ea72af8a1ce044918e785930859e6b48f2ea"},"schema_version":"1.0"},"canonical_sha256":"1987b2e4e42d93abd2d7a38809b09a0ffc6c49928489983401f70f6d02374974","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:46:06.302224Z","signature_b64":"uv/bnY57q5LUSZEMoWYByR66IqYfIVfhwxQ8+WbdtI1PuVu3Fna70tIbRhEREnBToj4NYQdzzWzqZmEeZj0JBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1987b2e4e42d93abd2d7a38809b09a0ffc6c49928489983401f70f6d02374974","last_reissued_at":"2026-05-18T01:46:06.301742Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:46:06.301742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1311.6467","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":"2026-05-18T01:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ozx8/6AlfuQsSO+CtmAXG/Ie3Y0d/9dvyF4SNt23VpWPjX+8Ip2Iflnmq6f5LotmZDhCWTxnOBmjCOUiDT1xAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:29:51.584480Z"},"content_sha256":"21c07c03248f10cce93d45d6b64737fc9cde7d2f073aecbd68246751c7bddf4f","schema_version":"1.0","event_id":"sha256:21c07c03248f10cce93d45d6b64737fc9cde7d2f073aecbd68246751c7bddf4f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:DGD3FZHEFWJ2XUWXUOEATME2B7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Removal of systematics in photometric measurements: static and rotating illumination corrections in FORS2@VLT data","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.IM","authors_text":"2), (2) Qatar Environment, Daniel M. Bramich (1, Doha, Energy Research Institute, Germany, Karl-Schwarzschild-Strasse, Lodovico Coccato (1), Qatar), Qatar Foundation, Sabine Moehler (1) ((1) European Southern Observatory, Wolfram Freudling (1)","submitted_at":"2013-11-25T21:00:03Z","abstract_excerpt":"Images taken with modern detectors require calibration via flat fielding to obtain the same flux scale across the whole image. One method for obtaining the best possible flat fielding accuracy is to derive a photometric model from dithered stellar observations. A large variety of effects have been taken into account in such modelling. Recently, Moehler et al. (2010) discovered systematic variations in available flat frames for the European Southern Observatory's FORS instrument that change with the orientation of the projected image on the sky. The effect on photometry is large compared to oth"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6467","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":"2026-05-18T01:46:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DMm5RdKVwJZQ/MVAPVF7dbxqUdjkE8XXHocw8Qg7q8aGcLs/omJUzDdS7ayl/aUqeXFGYfqAfbHrS2AV3EtUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:29:51.584853Z"},"content_sha256":"5f9d41f3e9458bd4fd2e829d4c6ae4b9da849aa4ab0d577c7bdf57c6735796a2","schema_version":"1.0","event_id":"sha256:5f9d41f3e9458bd4fd2e829d4c6ae4b9da849aa4ab0d577c7bdf57c6735796a2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/bundle.json","state_url":"https://pith.science/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/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":"2026-06-01T13:29:51Z","links":{"resolver":"https://pith.science/pith/DGD3FZHEFWJ2XUWXUOEATME2B7","bundle":"https://pith.science/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/bundle.json","state":"https://pith.science/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DGD3FZHEFWJ2XUWXUOEATME2B7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:DGD3FZHEFWJ2XUWXUOEATME2B7","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":"bf1a638994c20fccd866ca06bc14ea72af8a1ce044918e785930859e6b48f2ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-25T21:00:03Z","title_canon_sha256":"7ab3dc31586e5e56a48f096aa658d5241bd9cc5b9938767bc868fce9f0c80d18"},"schema_version":"1.0","source":{"id":"1311.6467","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1311.6467","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"arxiv_version","alias_value":"1311.6467v1","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1311.6467","created_at":"2026-05-18T01:46:06Z"},{"alias_kind":"pith_short_12","alias_value":"DGD3FZHEFWJ2","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_16","alias_value":"DGD3FZHEFWJ2XUWX","created_at":"2026-05-18T12:27:43Z"},{"alias_kind":"pith_short_8","alias_value":"DGD3FZHE","created_at":"2026-05-18T12:27:43Z"}],"graph_snapshots":[{"event_id":"sha256:5f9d41f3e9458bd4fd2e829d4c6ae4b9da849aa4ab0d577c7bdf57c6735796a2","target":"graph","created_at":"2026-05-18T01:46:06Z","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":"Images taken with modern detectors require calibration via flat fielding to obtain the same flux scale across the whole image. One method for obtaining the best possible flat fielding accuracy is to derive a photometric model from dithered stellar observations. A large variety of effects have been taken into account in such modelling. Recently, Moehler et al. (2010) discovered systematic variations in available flat frames for the European Southern Observatory's FORS instrument that change with the orientation of the projected image on the sky. The effect on photometry is large compared to oth","authors_text":"2), (2) Qatar Environment, Daniel M. Bramich (1, Doha, Energy Research Institute, Germany, Karl-Schwarzschild-Strasse, Lodovico Coccato (1), Qatar), Qatar Foundation, Sabine Moehler (1) ((1) European Southern Observatory, Wolfram Freudling (1)","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-25T21:00:03Z","title":"Removal of systematics in photometric measurements: static and rotating illumination corrections in FORS2@VLT data"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1311.6467","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":"sha256:21c07c03248f10cce93d45d6b64737fc9cde7d2f073aecbd68246751c7bddf4f","target":"record","created_at":"2026-05-18T01:46:06Z","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":"bf1a638994c20fccd866ca06bc14ea72af8a1ce044918e785930859e6b48f2ea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2013-11-25T21:00:03Z","title_canon_sha256":"7ab3dc31586e5e56a48f096aa658d5241bd9cc5b9938767bc868fce9f0c80d18"},"schema_version":"1.0","source":{"id":"1311.6467","kind":"arxiv","version":1}},"canonical_sha256":"1987b2e4e42d93abd2d7a38809b09a0ffc6c49928489983401f70f6d02374974","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1987b2e4e42d93abd2d7a38809b09a0ffc6c49928489983401f70f6d02374974","first_computed_at":"2026-05-18T01:46:06.301742Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:46:06.301742Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uv/bnY57q5LUSZEMoWYByR66IqYfIVfhwxQ8+WbdtI1PuVu3Fna70tIbRhEREnBToj4NYQdzzWzqZmEeZj0JBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:46:06.302224Z","signed_message":"canonical_sha256_bytes"},"source_id":"1311.6467","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21c07c03248f10cce93d45d6b64737fc9cde7d2f073aecbd68246751c7bddf4f","sha256:5f9d41f3e9458bd4fd2e829d4c6ae4b9da849aa4ab0d577c7bdf57c6735796a2"],"state_sha256":"029552c592091615f6a936a95fb4b226c0fb58d31c7d98d3a1dace457b86f761"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rIL8bHy/s9RB+0HkuPMPcS34QM6HJlWZDKzybHxH/1GoF7Wj7rcAL1RQakIukx4O0OEAFdVNgBs+PSuMkQ4OCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T13:29:51.586990Z","bundle_sha256":"b6f79247dedbc4f9efb5cc366021cb7ce6a4ac4b9d54f066ee7d79fed2bc87d9"}}