{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:TDYNWLISN3WJPT5LNE2637G25U","short_pith_number":"pith:TDYNWLIS","canonical_record":{"source":{"id":"1911.01430","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-04T19:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bb4d619539f0daa711897d0425d59109e1c7ec0e3ff0a56dbc9fa2d0920afe15","abstract_canon_sha256":"bdf4651dae62ed1a39acab5754cb8ef91b46b81ee599fdba5488551f10df436f"},"schema_version":"1.0"},"canonical_sha256":"98f0db2d126eec97cfab6935edfcdaed0e50775eb9c46b710e91d941e71fccf3","source":{"kind":"arxiv","id":"1911.01430","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.01430","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"arxiv_version","alias_value":"1911.01430v2","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.01430","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_12","alias_value":"TDYNWLISN3WJ","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_16","alias_value":"TDYNWLISN3WJPT5L","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_8","alias_value":"TDYNWLIS","created_at":"2026-07-05T00:35:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:TDYNWLISN3WJPT5LNE2637G25U","target":"record","payload":{"canonical_record":{"source":{"id":"1911.01430","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-04T19:00:01Z","cross_cats_sorted":["astro-ph.GA"],"title_canon_sha256":"bb4d619539f0daa711897d0425d59109e1c7ec0e3ff0a56dbc9fa2d0920afe15","abstract_canon_sha256":"bdf4651dae62ed1a39acab5754cb8ef91b46b81ee599fdba5488551f10df436f"},"schema_version":"1.0"},"canonical_sha256":"98f0db2d126eec97cfab6935edfcdaed0e50775eb9c46b710e91d941e71fccf3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:35:53.108175Z","signature_b64":"+X4eRHrfm3woHJtijDCvCznpxMk2Ej0PzPc3fttJARRSwWk/oW6fApWKZEl4YKQJeSJpXxRvcXtBXXE/ctpJCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"98f0db2d126eec97cfab6935edfcdaed0e50775eb9c46b710e91d941e71fccf3","last_reissued_at":"2026-07-05T00:35:53.107731Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:35:53.107731Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.01430","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:35:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bJ9Pyg5zR/1J6+fOql9zDrkpuQgZOwHCPMgGcBJkZ/ACv+FjlngGbyeTae/llVuqwWAvLmvFEKQnsBh0BYOlCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T23:30:25.234291Z"},"content_sha256":"cac22800e702cdd0c02a54d3b37de8f1263c8f235c685f28fca9d590d6467bfc","schema_version":"1.0","event_id":"sha256:cac22800e702cdd0c02a54d3b37de8f1263c8f235c685f28fca9d590d6467bfc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:TDYNWLISN3WJPT5LNE2637G25U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"The Sloan Digital Sky Survey extended point spread functions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.GA"],"primary_cat":"astro-ph.IM","authors_text":"Ignacio Trujillo, Javier Rom\\'an, Ra\\'ul Infante-Sainz","submitted_at":"2019-11-04T19:00:01Z","abstract_excerpt":"A robust and extended characterization of the point spread function (PSF) is crucial to extract the photometric information produced by deep imaging surveys. Here, we present the extended PSFs of the Sloan Digital Sky Survey (SDSS), one of the most productive astronomical surveys of all time. By stacking ~1000 images of individual stars with different brightness, we obtain the bidimensional SDSS PSFs extending over 8 arcmin in radius for all the SDSS filters(u, g, r, i, z). This new characterization of the SDSS PSFs is near a factor of 10 larger in extension than previous PSFs characterization"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.01430","kind":"arxiv","version":2},"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/1911.01430/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":"2026-07-05T00:35:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nilJUY5vzNoJC+l2DPfLMKxNZJ5vm2tcdZBwR0AOw9KEm2XZVTXXy70O9iwAeKqZyNsDF3J6/7Qm2ZZD1SLLDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T23:30:25.234796Z"},"content_sha256":"8c23ada058dd0d563e4217d2b78fd2e9e08d5df6de04904150e7197e67a790af","schema_version":"1.0","event_id":"sha256:8c23ada058dd0d563e4217d2b78fd2e9e08d5df6de04904150e7197e67a790af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TDYNWLISN3WJPT5LNE2637G25U/bundle.json","state_url":"https://pith.science/pith/TDYNWLISN3WJPT5LNE2637G25U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TDYNWLISN3WJPT5LNE2637G25U/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":"2026-08-20T23:30:25Z","links":{"resolver":"https://pith.science/pith/TDYNWLISN3WJPT5LNE2637G25U","bundle":"https://pith.science/pith/TDYNWLISN3WJPT5LNE2637G25U/bundle.json","state":"https://pith.science/pith/TDYNWLISN3WJPT5LNE2637G25U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TDYNWLISN3WJPT5LNE2637G25U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TDYNWLISN3WJPT5LNE2637G25U","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":"bdf4651dae62ed1a39acab5754cb8ef91b46b81ee599fdba5488551f10df436f","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-04T19:00:01Z","title_canon_sha256":"bb4d619539f0daa711897d0425d59109e1c7ec0e3ff0a56dbc9fa2d0920afe15"},"schema_version":"1.0","source":{"id":"1911.01430","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.01430","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"arxiv_version","alias_value":"1911.01430v2","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.01430","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_12","alias_value":"TDYNWLISN3WJ","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_16","alias_value":"TDYNWLISN3WJPT5L","created_at":"2026-07-05T00:35:53Z"},{"alias_kind":"pith_short_8","alias_value":"TDYNWLIS","created_at":"2026-07-05T00:35:53Z"}],"graph_snapshots":[{"event_id":"sha256:8c23ada058dd0d563e4217d2b78fd2e9e08d5df6de04904150e7197e67a790af","target":"graph","created_at":"2026-07-05T00:35:53Z","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/1911.01430/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"A robust and extended characterization of the point spread function (PSF) is crucial to extract the photometric information produced by deep imaging surveys. Here, we present the extended PSFs of the Sloan Digital Sky Survey (SDSS), one of the most productive astronomical surveys of all time. By stacking ~1000 images of individual stars with different brightness, we obtain the bidimensional SDSS PSFs extending over 8 arcmin in radius for all the SDSS filters(u, g, r, i, z). This new characterization of the SDSS PSFs is near a factor of 10 larger in extension than previous PSFs characterization","authors_text":"Ignacio Trujillo, Javier Rom\\'an, Ra\\'ul Infante-Sainz","cross_cats":["astro-ph.GA"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-04T19:00:01Z","title":"The Sloan Digital Sky Survey extended point spread functions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.01430","kind":"arxiv","version":2},"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:cac22800e702cdd0c02a54d3b37de8f1263c8f235c685f28fca9d590d6467bfc","target":"record","created_at":"2026-07-05T00:35:53Z","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":"bdf4651dae62ed1a39acab5754cb8ef91b46b81ee599fdba5488551f10df436f","cross_cats_sorted":["astro-ph.GA"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.IM","submitted_at":"2019-11-04T19:00:01Z","title_canon_sha256":"bb4d619539f0daa711897d0425d59109e1c7ec0e3ff0a56dbc9fa2d0920afe15"},"schema_version":"1.0","source":{"id":"1911.01430","kind":"arxiv","version":2}},"canonical_sha256":"98f0db2d126eec97cfab6935edfcdaed0e50775eb9c46b710e91d941e71fccf3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"98f0db2d126eec97cfab6935edfcdaed0e50775eb9c46b710e91d941e71fccf3","first_computed_at":"2026-07-05T00:35:53.107731Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:35:53.107731Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+X4eRHrfm3woHJtijDCvCznpxMk2Ej0PzPc3fttJARRSwWk/oW6fApWKZEl4YKQJeSJpXxRvcXtBXXE/ctpJCA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:35:53.108175Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.01430","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cac22800e702cdd0c02a54d3b37de8f1263c8f235c685f28fca9d590d6467bfc","sha256:8c23ada058dd0d563e4217d2b78fd2e9e08d5df6de04904150e7197e67a790af"],"state_sha256":"ebcc2790f258f78753fa41c7566f25c8569df42b7dc67f4bbc3a204ce60c1b08"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6hLFgUMvxHvG4gsqg+tg5vzJKsyR4Q+lSl1LJ8PDSpC5pUFLCt6b3WjgJoDExx454c1dylpan7Y3vZDJUd+ZAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T23:30:25.238739Z","bundle_sha256":"bdce27360acda3a1db955236670b91caf57860653bbe104d7e65da5415e2da0c"}}