{"paper":{"title":"The PDS 110 observing campaign - photometric and spectroscopic observations reveal eclipses are aperiodic","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"Alessandro Marchini, Alexander Scholz, Alexis M.S. Smith, Allyson Bieryla, Christopher Watson, Claudio Lopresti, Clifford Kotnik, Damien Lemay, Daniel Evans, David W. Latham, Edward Gomez, Elizabeth O. Waagen, Enrique Herrero Casas, Eric Dose, Ernst J.W. de Mooij, Fabio Salvaggio, Frank Dubois, Gabriel Murawski, George Zhou, Giacomo Bonnoli, Gilbert A. Esquerdo, Gordon Myers, Grant M. Kennedy, Howard Relles, Hubert Boussier, Hugh P. Osborn, Igor Becker, James J. McCormac, James Roa, Jeff Robertson, John Briol, John Hall, John Southworth, Josch Hambsch, Joseph E. Rodriguez, Kevin Hills, Liam Raynard, Lorenzo Barbieri, Luca Rizzuti, Luigi Mancini, Marc Deldem, Massimo Banfi, Matthew Burleigh, Matthew Kenworthy, Matthias Mallonn, Maximilian N. G\\\"uenther, Michael Hippke, Michael L. Calkins, Othon C. Winter, Pablo Lewin, Paul Benni, Paul Chote, Perry Berlind, P.J. Wheatley, Rafael Sfair, Ricardo Papini, Richard West, Richard W. Wilson, Robert James, Samuel N. Quinn, Shawn Dvorak, Sigfried Vanaverbeke, Simona Ciceri, Stella Kafka, Stephane Ferratfiat Dagot Berangez, Stephen Brincat, Stephen Fossey, Stuart Littlefair, TG Tan, Thomas L. Killestein, Tim Butterley, Ulisse Quadri, Velimir Popov, Vik S. Dhillon","submitted_at":"2019-01-23T16:26:50Z","abstract_excerpt":"PDS 110 is a young disk-hosting star in the Orion OB1A association. Two dimming events of similar depth and duration were seen in 2008 (WASP) and 2011 (KELT), consistent with an object in a closed periodic orbit. In this paper we present data from a ground-based observing campaign designed to measure the star both photometrically and spectroscopically during the time of predicted eclipse in September 2017. Despite high-quality photometry, the predicted eclipse did not occur, although coherent structure is present suggesting variable amounts of stellar flux or dust obscuration. We also searched"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.07981","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"}