The First Post-Kepler Brightness Dips of KIC 8462852
Creators: name: Boyajian, Tabetha S.
name: Alonso, Roi
name: Ammerman, Alex
name: Armstrong, David
name: Ramos, A. Asensio
name: Barkaoui, K.
name: Beatty, Thomas G.
name: Benkhaldoun, Z.
name: Benni, Paul
name: Bentley, Rory
name: Berdyugin, Andrei
name: Berdyugina, Svetlana
name: Bergeron, Serge
name: Bieryla, Allyson
name: Blain, Michaela G.
name: Blanco, Alicia Capetillo
name: Bodman, Eva H. L.
name: Boucher, Anne
name: Bradley, Mark
name: Brincat, Stephen M.
name: Brink, Thomas G.
name: Briol, John
name: Brown, David J. A.
name: Budaj, J.
name: Burdanov, A.
name: Cale, B.
name: Carbo, Miguel Aznar
name: Garcia, R. Castillo
name: Clark, Wendy J
name: Clayton, Geoffrey C.
name: Clem, James L.
name: Coker, Phillip H
name: Cook, Evan M.
name: Copperwheat, Chris M.
name: Curtis, J.
name: Cutri, R. M.
name: Cseh, B.
name: Cynamon, C. H.
name: Daniels, Alex J.
name: Davenport, James R. A.
name: Deeg, Hans J.
name: De Lorenzo, Roberto
name: De Jaeger, Thomas
name: Desrosiers, Jean-Bruno
name: Dolan, John
name: Dowhos, D. J.
name: Dubois, Franky
name: Durkee, R.
name: Dvorak, Shawn
name: Easley, Lynn
name: Edwards, N.
name: Ellis, Tyler G.
name: Erdelyi, Emery
name: Ertel, Steve
name: Farfán, Rafael. G.
name: Farihi, J.
name: Filippenko, Alexei V.
name: Foxell, Emma
name: Gandolfi, Davide
name: Garcia, Faustino
name: Giddens, F.
name: Gillon, M.
name: González-Carballo, Juan-Luis
name: González-Fernández, C.
name: Hernández, J. I. González
name: Graham, Keith A.
name: Greene, Kenton A.
name: Gregorio, J.
name: Hallakoun, Na'ama
name: Hanyecz, Ottó
name: Harp, G. R.
name: Henry, Gregory W.
name: Herrero, E.
name: Hildbold, Caleb F.
name: Hinzel, D.
name: Holgado, G.
name: Ignácz, Bernadett
name: Ivanov, Valentin D.
name: Jehin, E.
name: Jermak, Helen E.
name: Johnston, Steve
name: Kafka, S.
name: Kalup, Csilla
name: Kardasis, Emmanuel
name: Kaspi, Shai
name: Kennedy, Grant M.
name: Kiefer, F.
name: Kielty, C. L.
name: Kessler, Dennis
name: Kiiskinen, H.
name: Killestein, T. L.
name: King, Ronald A.
name: Kollar, V.
name: Korhonen, H.
name: Kotnik, C.
name: Könyves-Tóth, Réka
name: Kriskovics, Levente
name: Krumm, Nathan
name: Krushinsky, Vadim
name: Kundra, E.
name: Lachapelle, Francois-Rene
name: Lacourse, D.
name: Lake, P.
name: Lam, Kristine
name: Lamb, Gavin P.
name: Lane, Dave
name: Lau, Marie Wingyee
name: Lewin, Pablo
name: Lintott, Chris
name: Lisse, Carey
name: Logie, Ludwig
name: Longeard, Nicolas
name: Villanueva, M. Lopez
name: Ludington, E. Whit
name: Mainzer, A.
name: Malo, Lison
name: Maloney, Chris
name: Mann, A.
name: Mantero, A.
name: Marengo, Massimo
name: Marchant, Jon
name: González, M. J. Martinez
name: Masiero, Joseph R.
name: Mauerhan, Jon C.
name: Mccormac, James
name: Mcneely, Aaron
name: Meng, Huan Y. A.
name: Miller, Mike
name: Molnar, Lawrence A.
name: Morales, J. C.
name: Morris, Brett M.
name: Muterspaugh, Matthew W.
name: Nespral, David
name: Nugent, C. R.
name: Nugent, Katherine M.
name: Odasso, A.
name: O'keeffe, Derek
name: Oksanen, A.
name: O'meara, John M.
name: Ordasi, András
name: Osborn, Hugh
name: Ott, John J.
name: Parks, J. R.
name: Perez, Diego Rodriguez
name: Petriew, Vance
name: Pickard, R.
name: Pál, András
name: Plavchan, P.
name: Plaza, C. Westendorp
name: Pollacco, Don
name: Nuñez, F. Pozo
name: Pozuelos, F. J.
name: Rau, Steve
name: Redfield, Seth
name: Relles, Howard
name: Ribas, I.
name: Richards, Jon
name: Saario, Joonas L. O.
name: Safron, Emily J.
name: Sallai, J. Martin
name: Sárneczky, Krisztián
name: Schaefer, Bradley E.
name: Schumer, Clea F.
name: Schwartzendruber, Madison
name: Siegel, Michael H.
name: Siemion, Andrew P. V.
name: Simmons, Brooke D.
name: Simon, Joshua D.
name: Simón-Diaz, S.
name: Sitko, Michael L.
name: Socas-Navarro, Hector
name: Sódor, Á.
name: Starkey, Donn
name: Steele, Iain A.
name: Stone, Geoff
name: Street, R. A.
name: Sullivan, Tricia
name: Suomela, J.
name: Swift, J. J.
name: Szabó, Gyula M.
name: Szabó, Róbert
name: Szakáts, Róbert
name: Szalai, Tamás
name: Tanner, Angelle M.
name: Toledo-Padrón, B.
name: Tordai, Tamás
name: Triaud, Amaury H. M. J.
name: Turner, Jake D.
name: Ulowetz, Joseph H.
name: Urbanik, Marian
name: Vanaverbeke, Siegfried
name: Vanderburg, Andrew
name: Vida, Krisztián
name: Vietje, Brad P.
name: Vinkó, József
name: Von Braun, K.
name: Waagen, Elizabeth O.
name: Walsh, Dan
name: Watson, Christopher A.
name: Weir, R. C.
name: Wenzel, Klaus
name: Williamson, Michael W.
name: Wright, Jason T.
name: Wyatt, M. C.
name: Zheng, Weikang
name: Zsidi, Gabriella
Publisher: name: arXiv
Year: 2018
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present a photometric detection of the first brightness dips of the unique variable star KIC 8462852 since the end of the Kepler space mission in 2013 May. Our regular photometric surveillance started in October 2015, and a sequence of dipping began in 2017 May continuing on through the end of 2017, when the star was no longer visible from Earth. We distinguish four main 1-2.5% dips, named "Elsie," "Celeste," "Skara Brae," and "Angkor", which persist on timescales from several days to weeks. Our main results so far are: (i) there are no apparent changes of the stellar spectrum or polarization during the dips; (ii) the multiband photometry of the dips shows differential reddening favoring non-grey extinction. Therefore, our data are inconsistent with dip models that invoke optically thick material, but rather they are in-line with predictions for an occulter consisting primarily of ordinary dust, where much of the material must be optically thin with a size scale &lt;&lt;1um, and may also be consistent with models invoking variations intrinsic to the stellar photosphere. Notably, our data do not place constraints on the color of the longer-term "secular" dimming, which may be caused by independent processes, or probe different regimes of a single process.
description: 19 pages, 8 figures, accepted for publication in ApJL