{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:W53YG45QQE7UDSDD6CKEX4TYUS","short_pith_number":"pith:W53YG45Q","canonical_record":{"source":{"id":"0812.4310","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T23:02:21Z","cross_cats_sorted":[],"title_canon_sha256":"45a7fad54bf93c7bcc92d186103e57d592e2eba5b00436072f5a47860b5eb5de","abstract_canon_sha256":"89572fab07e498d8c8513bd4373dbf5788fc881b60e8e7210c454081667c97e5"},"schema_version":"1.0"},"canonical_sha256":"b7778373b0813f41c863f0944bf278a4ae863df2b656ffb58645d960d1743e92","source":{"kind":"arxiv","id":"0812.4310","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.4310","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"arxiv_version","alias_value":"0812.4310v1","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.4310","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_12","alias_value":"W53YG45QQE7U","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_16","alias_value":"W53YG45QQE7UDSDD","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_8","alias_value":"W53YG45Q","created_at":"2026-07-04T15:35:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:W53YG45QQE7UDSDD6CKEX4TYUS","target":"record","payload":{"canonical_record":{"source":{"id":"0812.4310","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T23:02:21Z","cross_cats_sorted":[],"title_canon_sha256":"45a7fad54bf93c7bcc92d186103e57d592e2eba5b00436072f5a47860b5eb5de","abstract_canon_sha256":"89572fab07e498d8c8513bd4373dbf5788fc881b60e8e7210c454081667c97e5"},"schema_version":"1.0"},"canonical_sha256":"b7778373b0813f41c863f0944bf278a4ae863df2b656ffb58645d960d1743e92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:35:02.377235Z","signature_b64":"jXze/HEl5xG3PTHDe/jjibKyqA35rTztQYAuCNLW6SmXARQA53ujmpScJ/nOcV9EaWQbYiWksGB9il6gqiNlDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b7778373b0813f41c863f0944bf278a4ae863df2b656ffb58645d960d1743e92","last_reissued_at":"2026-07-04T15:35:02.376897Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:35:02.376897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0812.4310","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":"2026-07-04T15:35:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t4pkhDr9YlM8R2dJ+F+uhVMjUFdhB1M6NWcyAAvqmIrgyEiGKgETP20DKtcxpGm5sBZ46/5mkCQeHQ8UXfe2Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T01:32:48.908375Z"},"content_sha256":"0d36fe475093f02015ded78b084c8ebe90243bc8b66a3d0cce13ca789da60bc8","schema_version":"1.0","event_id":"sha256:0d36fe475093f02015ded78b084c8ebe90243bc8b66a3d0cce13ca789da60bc8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:W53YG45QQE7UDSDD6CKEX4TYUS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"AWAIC: A WISE Astronomical Image Co-adder","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"Frank J. Masci, John W. Fowler","submitted_at":"2008-12-22T23:02:21Z","abstract_excerpt":"We describe a new image co-addition tool, AWAIC, to support the creation of a digital Image Atlas from the multiple frame exposures acquired with the Wide-field Infrared Survey Explorer (WISE). AWAIC includes preparatory steps such as frame background matching and outlier detection using robust frame-stack statistics. Frame co-addition is based on using the detector's Point Response Function (PRF) as an interpolation kernel. This kernel reduces the impact of prior-masked pixels; enables the creation of an optimal matched filtered product for point source detection; and most important, it allow"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.4310","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0812.4310/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:35:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uZKMruLDv8j3doJeOBiKDdrTiil68oww9lFpDL7xoTbZD7GFDG2nPToFnuDW0/JbpXk05SvGh6GmrQ2Q1FPHCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T01:32:48.908757Z"},"content_sha256":"f7d23c8c73330967f4e358a72247b738393414d16e9e38c0f798b4995e11bdd4","schema_version":"1.0","event_id":"sha256:f7d23c8c73330967f4e358a72247b738393414d16e9e38c0f798b4995e11bdd4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W53YG45QQE7UDSDD6CKEX4TYUS/bundle.json","state_url":"https://pith.science/pith/W53YG45QQE7UDSDD6CKEX4TYUS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W53YG45QQE7UDSDD6CKEX4TYUS/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":"2026-07-25T01:32:48Z","links":{"resolver":"https://pith.science/pith/W53YG45QQE7UDSDD6CKEX4TYUS","bundle":"https://pith.science/pith/W53YG45QQE7UDSDD6CKEX4TYUS/bundle.json","state":"https://pith.science/pith/W53YG45QQE7UDSDD6CKEX4TYUS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W53YG45QQE7UDSDD6CKEX4TYUS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:W53YG45QQE7UDSDD6CKEX4TYUS","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":"89572fab07e498d8c8513bd4373dbf5788fc881b60e8e7210c454081667c97e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T23:02:21Z","title_canon_sha256":"45a7fad54bf93c7bcc92d186103e57d592e2eba5b00436072f5a47860b5eb5de"},"schema_version":"1.0","source":{"id":"0812.4310","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0812.4310","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"arxiv_version","alias_value":"0812.4310v1","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0812.4310","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_12","alias_value":"W53YG45QQE7U","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_16","alias_value":"W53YG45QQE7UDSDD","created_at":"2026-07-04T15:35:02Z"},{"alias_kind":"pith_short_8","alias_value":"W53YG45Q","created_at":"2026-07-04T15:35:02Z"}],"graph_snapshots":[{"event_id":"sha256:f7d23c8c73330967f4e358a72247b738393414d16e9e38c0f798b4995e11bdd4","target":"graph","created_at":"2026-07-04T15:35:02Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/0812.4310/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We describe a new image co-addition tool, AWAIC, to support the creation of a digital Image Atlas from the multiple frame exposures acquired with the Wide-field Infrared Survey Explorer (WISE). AWAIC includes preparatory steps such as frame background matching and outlier detection using robust frame-stack statistics. Frame co-addition is based on using the detector's Point Response Function (PRF) as an interpolation kernel. This kernel reduces the impact of prior-masked pixels; enables the creation of an optimal matched filtered product for point source detection; and most important, it allow","authors_text":"Frank J. Masci, John W. Fowler","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T23:02:21Z","title":"AWAIC: A WISE Astronomical Image Co-adder"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0812.4310","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":"sha256:0d36fe475093f02015ded78b084c8ebe90243bc8b66a3d0cce13ca789da60bc8","target":"record","created_at":"2026-07-04T15:35:02Z","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":"89572fab07e498d8c8513bd4373dbf5788fc881b60e8e7210c454081667c97e5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph","submitted_at":"2008-12-22T23:02:21Z","title_canon_sha256":"45a7fad54bf93c7bcc92d186103e57d592e2eba5b00436072f5a47860b5eb5de"},"schema_version":"1.0","source":{"id":"0812.4310","kind":"arxiv","version":1}},"canonical_sha256":"b7778373b0813f41c863f0944bf278a4ae863df2b656ffb58645d960d1743e92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b7778373b0813f41c863f0944bf278a4ae863df2b656ffb58645d960d1743e92","first_computed_at":"2026-07-04T15:35:02.376897Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:35:02.376897Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jXze/HEl5xG3PTHDe/jjibKyqA35rTztQYAuCNLW6SmXARQA53ujmpScJ/nOcV9EaWQbYiWksGB9il6gqiNlDA==","signature_status":"signed_v1","signed_at":"2026-07-04T15:35:02.377235Z","signed_message":"canonical_sha256_bytes"},"source_id":"0812.4310","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d36fe475093f02015ded78b084c8ebe90243bc8b66a3d0cce13ca789da60bc8","sha256:f7d23c8c73330967f4e358a72247b738393414d16e9e38c0f798b4995e11bdd4"],"state_sha256":"eb5b6a6366fa9f413041b30afb1e5d246cde2905c86189bb41a79c772ea2589a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0HEdLqQIxXQh0tkdSypXD1VGteCwY8PFsnPzTL305dv+tGp+hHVMdur3PB0AxjzguJ3xkLmk3C60uKy7QhsYDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T01:32:48.911796Z","bundle_sha256":"ed7f1b20093f6d08d5715d0879b33a8edf918a892a076f3edbb2c31306cfc325"}}