{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:YZN56E2AFZW5H7JFDALAW23Q7F","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":"951b9df5d7003d695dca69230c0b55b18f1b1b0f4beb0aa2f1ed19b4aaab10ca","cross_cats_sorted":["astro-ph.CO","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-13T16:13:20Z","title_canon_sha256":"2fe251e1a7f039bb6d5eaf81a8a85777b0fa45d2924cf446a8a642772c91cad1"},"schema_version":"1.0","source":{"id":"2605.13735","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2605.13735","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"arxiv_version","alias_value":"2605.13735v2","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.13735","created_at":"2026-05-18T02:44:16Z"},{"alias_kind":"pith_short_12","alias_value":"YZN56E2AFZW5","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_16","alias_value":"YZN56E2AFZW5H7JF","created_at":"2026-05-18T12:33:37Z"},{"alias_kind":"pith_short_8","alias_value":"YZN56E2A","created_at":"2026-05-18T12:33:37Z"}],"graph_snapshots":[{"event_id":"sha256:dfc735149e592ea067a10f199ae031c9db3721079d455a27f814262172f3bd8d","target":"graph","created_at":"2026-05-18T02:44:16Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"We find that the spatial resolution of the host-galaxy images is improved to a level comparable to that of images from the Hubble Space Telescope and that the bright central point sources are removed."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"The point-source balance constraint based on the pixel-wise product I_sm × I_sp removes the point source without over- or under-subtraction while the smoothness and sparsity constraints suffice to separate components accurately in real data."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"A new deconvolution algorithm separates AGN host galaxies from central point sources via smoothness, sparsity, and a pixel-wise product balance constraint, achieving HST-comparable resolution on Subaru HSC data."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"A deconvolution algorithm enhances the resolution of AGN host galaxy images to Hubble levels while cleanly removing the central point source."}],"snapshot_sha256":"b3bfae22e50fffbd32ed289f919a93b791506dc191daad2c00bf15a61b811e4a"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We propose a new point-spread function (PSF) deconvolution algorithm for images of galaxies hosting an active galactic nucleus (AGN), designed to simultaneously enhance the spatial resolution of the host galaxy and remove the bright central point source. In this algorithm, an intrinsic image is reconstructed by decomposing an observed image into two components: an image $I_{\\rm sm}$ of an extended component (i.e., a host galaxy) and an image $I_{\\rm sp}$ of a point-source component (i.e., an AGN). During image reconstruction, three constraints are imposed: (1) a smooth constraint on the image ","authors_text":"Kazunori Matsuda, Ren Kawase, Takatoshi Shibuya","cross_cats":["astro-ph.CO","astro-ph.IM"],"headline":"A deconvolution algorithm enhances the resolution of AGN host galaxy images to Hubble levels while cleanly removing the central point source.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-13T16:13:20Z","title":"A New PSF Deconvolution Algorithm: Simultaneous Spatial Resolution Enhancement and Point Source Removal for Morphological Analysis of AGN Host Galaxies"},"references":{"count":59,"internal_anchors":1,"resolved_work":59,"sample":[{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":1,"title":"2022, PASJ, 74, 247","work_id":"61a33c5a-a032-47d2-a8bf-506ace66e6af","year":2022},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":2,"title":"Beck, A., & Teboulle, M. 2009, SIAM J. Imaging Sci., 2, 183","work_id":"9fad074c-85ab-4a94-afd6-e01d590d6688","year":2009},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":3,"title":"2025, ApJ, 978, 74","work_id":"de18518c-a235-474c-aa24-159c86ddb782","year":2025},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":4,"title":"2026, ApJ, 997, 47","work_id":"d48a23be-88d8-40a9-91f3-d717cb88eefc","year":2026},{"cited_arxiv_id":"","doi":"","is_internal_anchor":false,"ref_index":5,"title":"2011, ApJ, 726, 57","work_id":"4a816a99-53f6-4b4e-96e5-5994f6ec3ac5","year":2011}],"snapshot_sha256":"d214a1f0aafd40c111d10c576657cc253c44d23f9ac3504cd6fbc2f3411753f2"},"source":{"id":"2605.13735","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-15T02:49:41.015256Z","id":"477e23f0-483f-4d4b-95b3-3c2e79ba92c7","model_set":{"reader":"grok-4.3"},"one_line_summary":"A new deconvolution algorithm separates AGN host galaxies from central point sources via smoothness, sparsity, and a pixel-wise product balance constraint, achieving HST-comparable resolution on Subaru HSC data.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"A deconvolution algorithm enhances the resolution of AGN host galaxy images to Hubble levels while cleanly removing the central point source.","strongest_claim":"We find that the spatial resolution of the host-galaxy images is improved to a level comparable to that of images from the Hubble Space Telescope and that the bright central point sources are removed.","weakest_assumption":"The point-source balance constraint based on the pixel-wise product I_sm × I_sp removes the point source without over- or under-subtraction while the smoothness and sparsity constraints suffice to separate components accurately in real data."}},"verdict_id":"477e23f0-483f-4d4b-95b3-3c2e79ba92c7"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:63917885096b8850056028f03e2c5ecb662126c37d02703020a74c36cb2c9eb3","target":"record","created_at":"2026-05-18T02:44:16Z","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":"951b9df5d7003d695dca69230c0b55b18f1b1b0f4beb0aa2f1ed19b4aaab10ca","cross_cats_sorted":["astro-ph.CO","astro-ph.IM"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"astro-ph.GA","submitted_at":"2026-05-13T16:13:20Z","title_canon_sha256":"2fe251e1a7f039bb6d5eaf81a8a85777b0fa45d2924cf446a8a642772c91cad1"},"schema_version":"1.0","source":{"id":"2605.13735","kind":"arxiv","version":2}},"canonical_sha256":"c65bdf13402e6dd3fd2518160b6b70f950ffa09b62b2f260da1d9aeb5d97e987","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c65bdf13402e6dd3fd2518160b6b70f950ffa09b62b2f260da1d9aeb5d97e987","first_computed_at":"2026-05-18T02:44:16.520749Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:44:16.520749Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DACArkxhitDMgTeEWsG0UEE3gvrT1iKKCYUTgX/0T5oUOsjzdC2tUuU3j7+c5gvQGiNO1VN1RhOwkVK40bSXBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:44:16.521214Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.13735","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:63917885096b8850056028f03e2c5ecb662126c37d02703020a74c36cb2c9eb3","sha256:dfc735149e592ea067a10f199ae031c9db3721079d455a27f814262172f3bd8d"],"state_sha256":"24a0112ffd86196eda172fc96e9d749edbc720238210eeb8627e5076a9815ae1"}