{"paper":{"title":"Optical Variability of Quasars with 20-Year Photometric Light Curves","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.GA","authors_text":"A. A. Plazas Malag\\'on, A. Carnero Rosell, A. Pieres, C. Lidman, Colin J. Burke, C. To (DES Collaboration), D. Bacon, D. Brooks, D. Gruen, D. J. James, D. L. Burke, D. L. Hollowood, D. N. Friedel, E. Bertin, E. Gaztanaga, E. Sanchez, E. Suchyta, F. Andrade-Oliveira, F. Menanteau, F. Paz-Chinch\\'on, G. Gutierrez, G. Tarl\\'e, H. T. Diehl, I. Ferrero, I. Sevilla-Noarbe, J. Annis, J. Carretero, J. De Vicente, J. Frieman, J. Garc\\'ia-Bellido, K. Honscheid, K. Kuehn, L. N. da Costa, M. Adam\\'ow, M. A. G. Maia, M. Carrasco Kind, M. E. C. Swanson, M. E. S. Pereira, M. Rodriguez-Monroy, M. Smith, N. Kuropatkin, P. Doel, Qian Yang, R. A. Gruendl, R. Miquel, R. Morgan, S. Bocquet, S. Desai, S. R. Hinton, S. Serrano, V. Scarpine, Xin Liu, Yu-Ching Chen, Yue Shen, Zachary Stone","submitted_at":"2022-01-08T04:59:06Z","abstract_excerpt":"We study the optical $gri$ photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during $\\sim 1998-2020$ with SDSS, PanSTARRS-1, the Dark Energy Survey, and dedicated follow-up monitoring with Blanco 4m/DECam. With on average $\\sim 200$ nightly epochs per quasar per filter band, we improve the parameter constraints from a Damped Random Walk (DRW) model fit to the light curves over previous studies with 10-15 yr baselines and $\\lesssim 100$ epochs. We find that the average damping timescale $\\tau_{\\rm DRW}$ continues to rise"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2201.02762","kind":"arxiv","version":3},"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/2201.02762/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"}