{"paper":{"title":"A survey for variable young stars with small telescopes: II -- Mapping a protoplanetary disk with stable structures at 0.15 AU","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.SR"],"primary_cat":"astro-ph.GA","authors_text":"Adolfo San Segundo Delgado, Aleks Scholz, Alex Escartin Perez, Barry Merrikin, Bringfried Stecklum, Carlos Perell\\'o Perez, Dawid Mo\\'zdzierski, Dean Roberts, Dirk Froebrich, Domenico Licchelli, Emery Erdelyi, Emma DArcy, Erik Schwendeman, Esteban Fern\\'andez Ma\\~nanes, Faustino Garc\\'ia de la Cuesta, Fernando Limon Martinez, Francisco C. Sold\\'an Alfaro, Franky Dubois, George Fleming, Georg Piehler, Igor Kudzej, Jack J. Evitts, James Crumpton, Jes\\'us Delgado Casal, Jochen Eisl\\\"offel, Jos\\'ep Luis Salto Gonz\\'alez, Juan-Luis Gonzalez Carballo, Justyn Campbell-White, Katarzyna Kowalska, Klaas Wiersema, Krzysztof Kotysz, Lord Dover, Ludwig Logie, Lu\\'is Montoro, Luis Tremosa Espasa, Marc Deldem, Mario Morales Aimar, Mark Phillips, Nick Quinn, Pavol A. Dubovsk\\'y, Przemys{\\l}aw Miko{\\l}ajczyk, Rafael Castillo Garc\\'ia, Rafael Gonzalez Farf\\'an, Ramon Naves, Roger Pickard, Sally V. Makin, Samuel J. Billington, Shawn Dvorak, Siegfried Vanaverbeke, Stephen Johnstone, Stephen R.L. Futcher, Steve Rau, Thomas Killestein, Thomas Urtly, Tim Nelson, Timothy P. Long, Tonny Vanmunster, Tony Vale, Ulrich Kolb, Will Furnell","submitted_at":"2020-01-15T21:52:08Z","abstract_excerpt":"The HOYS citizen science project conducts long term, multifilter, high cadence monitoring of large YSO samples with a wide variety of professional and amateur telescopes. We present the analysis of the light curve of V1490Cyg in the Pelican Nebula. We show that colour terms in the diverse photometric data can be calibrated out to achieve a median photometric accuracy of 0.02mag in broadband filters, allowing detailed investigations into a variety of variability amplitudes over timescales from hours to several years. Using GaiaDR2 we estimate the distance to the Pelican Nebula to be 870$^{+70}_"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.05570","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/2001.05570/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"}