{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:I3CFVUEOVWTFBTZB64K6JQR6IQ","short_pith_number":"pith:I3CFVUEO","canonical_record":{"source":{"id":"2003.10457","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-23T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"166c4512d1237785797627e518a876ebf7b9b07386e4b7ab509c0dd4938d646b","abstract_canon_sha256":"61f872cb7bb83feb9c5f001527dda0651cbf91fcd44d50c75a533f8fd0b8e9b7"},"schema_version":"1.0"},"canonical_sha256":"46c45ad08eada650cf21f715e4c23e442157fe190f5b5465d1a60d838dcc2958","source":{"kind":"arxiv","id":"2003.10457","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.10457","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"arxiv_version","alias_value":"2003.10457v2","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.10457","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_12","alias_value":"I3CFVUEOVWTF","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"I3CFVUEOVWTFBTZB","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"I3CFVUEO","created_at":"2026-07-05T01:31:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:I3CFVUEOVWTFBTZB64K6JQR6IQ","target":"record","payload":{"canonical_record":{"source":{"id":"2003.10457","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-23T18:00:03Z","cross_cats_sorted":[],"title_canon_sha256":"166c4512d1237785797627e518a876ebf7b9b07386e4b7ab509c0dd4938d646b","abstract_canon_sha256":"61f872cb7bb83feb9c5f001527dda0651cbf91fcd44d50c75a533f8fd0b8e9b7"},"schema_version":"1.0"},"canonical_sha256":"46c45ad08eada650cf21f715e4c23e442157fe190f5b5465d1a60d838dcc2958","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:31:03.278141Z","signature_b64":"lFQamRJEOjlag8zQ29gl3300FgTAAod3G6Ibkrn+Ox+zUR2iAgvlMEaVuTS4evhM5XN9pXFn1kLpSlPkrwNoAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"46c45ad08eada650cf21f715e4c23e442157fe190f5b5465d1a60d838dcc2958","last_reissued_at":"2026-07-05T01:31:03.277650Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:31:03.277650Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2003.10457","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":"2026-07-05T01:31:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ySXXib7KZXbLZ45fGNfZlFk3UUS7xgOTfYqe/N0CLcc4aMeeo5EOXU++IepNtLexFx+ggYKclEXz6Rdces92AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:45:34.782709Z"},"content_sha256":"72d98a9299a9391f89de411739b6fad3e763b0c878be739e4a79ea5482495df2","schema_version":"1.0","event_id":"sha256:72d98a9299a9391f89de411739b6fad3e763b0c878be739e4a79ea5482495df2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:I3CFVUEOVWTFBTZB64K6JQR6IQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"Aaron Roodman, Anais M\\\"oller, Andr\\'es A. Plazas, Anita K. Romer, Antonella Palmese, Aurelio Carnero Rosell, Brad E. Tucker, Christopher Lidman, Colin J. Burke, Daniela Carollo, Daniel Gruen, David Brooks, David J. James, David W. Gerdes, Devon L. Hollowood, Emmanuel Bertin, Enrique Gaztanaga, Eric Morganson, Eric Suchyta, Eusebio Sanchez, Felipe Menanteau, Francisco Paz-Chinch\\'on, Gaston Gutierrez, Gregory Tarle, Hengxiao Guo, Juan De Vicente, Juan Garc\\'ia-Bellido, Julia Gschwend, Kaiwen Zhang, Kedar A. Phadke, Klaus Honscheid, Kyler Kuehn, Luiz N. Da Costa, Marcelle Soares-Santos, Marcio A. G. Maia, Marcos Lima, Mathew Smith, Matias Carrasco Kind, Matteo Costanzi, Michael Schubnell, Michel Aguena, Molly E. C. Swanson, Natalia E. Sommer, Peter Doel, Ramon Miquel, Ricardo L. C. Ogando, Robert A. Gruendl, Sahar Allam, Samuel R. Hinton, Santiago Avila, Santiago Serrano, Shantanu Desai, Spencer Everett, Tamas N. Varga (DES Collaboration), Tim F. Eifler, Vic Scarpine, Xin Liu, Yu-Ching Chen, Yue Shen","submitted_at":"2020-03-23T18:00:03Z","abstract_excerpt":"We report the identification of a low-mass AGN, DES J0218$-$0430, in a redshift $z = 0.823$ galaxy in the Dark Energy Survey (DES) Supernova field. We select DES J0218$-$0430 as an AGN candidate by characterizing its long-term optical variability alone based on DES optical broad-band light curves spanning over 6 years. An archival optical spectrum from the fourth phase of the Sloan Digital Sky Survey shows both broad Mg II and broad H$\\beta$ lines, confirming its nature as a broad-line AGN. Archival XMM-Newton X-ray observations suggest an intrinsic hard X-ray luminosity of $L_{{\\rm 2-12\\,keV}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.10457","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/2003.10457/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":"2026-07-05T01:31:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LauB5VbIDsLY+e77rCVeK9gIgCq4BPTyIr2QkgSEnBHvswtcBFPOKA9/yWTEWBgIAIasyjqHxSYAvkT2+Z87Dg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T15:45:34.783087Z"},"content_sha256":"346eefc1030ab71f14000ce9c038231387c6f5315f8524a94179e83e83eca20a","schema_version":"1.0","event_id":"sha256:346eefc1030ab71f14000ce9c038231387c6f5315f8524a94179e83e83eca20a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/bundle.json","state_url":"https://pith.science/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/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":"2026-07-07T15:45:34Z","links":{"resolver":"https://pith.science/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ","bundle":"https://pith.science/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/bundle.json","state":"https://pith.science/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I3CFVUEOVWTFBTZB64K6JQR6IQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:I3CFVUEOVWTFBTZB64K6JQR6IQ","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":"61f872cb7bb83feb9c5f001527dda0651cbf91fcd44d50c75a533f8fd0b8e9b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-23T18:00:03Z","title_canon_sha256":"166c4512d1237785797627e518a876ebf7b9b07386e4b7ab509c0dd4938d646b"},"schema_version":"1.0","source":{"id":"2003.10457","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2003.10457","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"arxiv_version","alias_value":"2003.10457v2","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2003.10457","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_12","alias_value":"I3CFVUEOVWTF","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"I3CFVUEOVWTFBTZB","created_at":"2026-07-05T01:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"I3CFVUEO","created_at":"2026-07-05T01:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:346eefc1030ab71f14000ce9c038231387c6f5315f8524a94179e83e83eca20a","target":"graph","created_at":"2026-07-05T01:31:03Z","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/2003.10457/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report the identification of a low-mass AGN, DES J0218$-$0430, in a redshift $z = 0.823$ galaxy in the Dark Energy Survey (DES) Supernova field. We select DES J0218$-$0430 as an AGN candidate by characterizing its long-term optical variability alone based on DES optical broad-band light curves spanning over 6 years. An archival optical spectrum from the fourth phase of the Sloan Digital Sky Survey shows both broad Mg II and broad H$\\beta$ lines, confirming its nature as a broad-line AGN. Archival XMM-Newton X-ray observations suggest an intrinsic hard X-ray luminosity of $L_{{\\rm 2-12\\,keV}","authors_text":"Aaron Roodman, Anais M\\\"oller, Andr\\'es A. Plazas, Anita K. Romer, Antonella Palmese, Aurelio Carnero Rosell, Brad E. Tucker, Christopher Lidman, Colin J. Burke, Daniela Carollo, Daniel Gruen, David Brooks, David J. James, David W. Gerdes, Devon L. Hollowood, Emmanuel Bertin, Enrique Gaztanaga, Eric Morganson, Eric Suchyta, Eusebio Sanchez, Felipe Menanteau, Francisco Paz-Chinch\\'on, Gaston Gutierrez, Gregory Tarle, Hengxiao Guo, Juan De Vicente, Juan Garc\\'ia-Bellido, Julia Gschwend, Kaiwen Zhang, Kedar A. Phadke, Klaus Honscheid, Kyler Kuehn, Luiz N. Da Costa, Marcelle Soares-Santos, Marcio A. G. Maia, Marcos Lima, Mathew Smith, Matias Carrasco Kind, Matteo Costanzi, Michael Schubnell, Michel Aguena, Molly E. C. Swanson, Natalia E. Sommer, Peter Doel, Ramon Miquel, Ricardo L. C. Ogando, Robert A. Gruendl, Sahar Allam, Samuel R. Hinton, Santiago Avila, Santiago Serrano, Shantanu Desai, Spencer Everett, Tamas N. Varga (DES Collaboration), Tim F. Eifler, Vic Scarpine, Xin Liu, Yu-Ching Chen, Yue Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-23T18:00:03Z","title":"Dark Energy Survey Identification of A Low-Mass Active Galactic Nucleus at Redshift 0.823 from Optical Variability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2003.10457","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":"sha256:72d98a9299a9391f89de411739b6fad3e763b0c878be739e4a79ea5482495df2","target":"record","created_at":"2026-07-05T01:31:03Z","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":"61f872cb7bb83feb9c5f001527dda0651cbf91fcd44d50c75a533f8fd0b8e9b7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.GA","submitted_at":"2020-03-23T18:00:03Z","title_canon_sha256":"166c4512d1237785797627e518a876ebf7b9b07386e4b7ab509c0dd4938d646b"},"schema_version":"1.0","source":{"id":"2003.10457","kind":"arxiv","version":2}},"canonical_sha256":"46c45ad08eada650cf21f715e4c23e442157fe190f5b5465d1a60d838dcc2958","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"46c45ad08eada650cf21f715e4c23e442157fe190f5b5465d1a60d838dcc2958","first_computed_at":"2026-07-05T01:31:03.277650Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:31:03.277650Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lFQamRJEOjlag8zQ29gl3300FgTAAod3G6Ibkrn+Ox+zUR2iAgvlMEaVuTS4evhM5XN9pXFn1kLpSlPkrwNoAg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:31:03.278141Z","signed_message":"canonical_sha256_bytes"},"source_id":"2003.10457","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:72d98a9299a9391f89de411739b6fad3e763b0c878be739e4a79ea5482495df2","sha256:346eefc1030ab71f14000ce9c038231387c6f5315f8524a94179e83e83eca20a"],"state_sha256":"cdeb405577de71a4d37ef8bf227ec32ae48632c0ecc2dfb3d426a7b4fd6f1e3d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H/sgvJmbSJ8zhebF8u6L8beifcyFE/SBIWclfQHKh4sb4yeEdxun7S6hh6hLBTu31iYbIoKhH8bKPL8OS2JDCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T15:45:34.784997Z","bundle_sha256":"876730046651f9407f44cc58ea6246a314be9433c748714d03126950f70c4fed"}}