Journal article

The Rise and Fall of ASASSN-18pg: Following a TDE from Early to Late Times

Thomas W-S Holoien, Katie Auchettl, Michael A Tucker, Benjamin J Shappee, Shannon G Patel, James CA Miller-Jones, Brenna Mockler, Daniel N Groenewald, Jason T Hinkle, Jonathan S Brown, Christopher S Kochanek, KZ Stanek, Ping Chen, Subo Dong, Jose L Prieto, Todd A Thompson, Rachael L Beaton, Thomas Connor, Philip S Cowperthwaite, Linnea Dahmen Show all

ASTROPHYSICAL JOURNAL | IOP PUBLISHING LTD | Published : 2020

Abstract

We present nearly 500 days of observations of the tidal disruption event (TDE) ASASSN-18pg, spanning from 54 days before peak light to 441 days after peak light. Our data set includes X-ray, UV, and optical photometry, optical spectroscopy, radio observations, and the first published spectropolarimetric observations of a TDE. ASASSN-18pg was discovered on 2018 July 11 by the All-Sky Automated Survey for Supernovae (ASAS-SN) at a distance of d = 78.6 Mpc; with a peak UV magnitude of m sime 14, it is both one of the nearest and brightest TDEs discovered to-date. The photometric data allow us to track both the rise to peak and the long-term evolution of the TDE. ASASSN-18pg peaked at a luminosi..

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University of Melbourne Researchers

Grants

Awarded by Gordon and Betty Moore Foundation


Awarded by NSF


Awarded by Danish National Research Foundation


Awarded by DOE CSGF


Awarded by FONDECYT


Awarded by Ministry of Economy, Development, and Tourism's Millennium Science Initiative


Awarded by Scialog Scholar grant from the Research Corporation


Awarded by NASA through the NASA Hubble Fellowship by the Space Telescope Science Institute


Awarded by NASA


Awarded by Hubble Fellowship by NASA through a grant from the Space Telescope Science Institute (STScI)


Awarded by Polish NCN MAESTRO


Awarded by NASA/Swift grant


Awarded by Australian Government through the Australian Research Council's Discovery Projects funding scheme


Awarded by Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D)



Funding Acknowledgements

We thank the Las Cumbres Observatory and its staff for its continuing support of the ASAS-SN project. ASAS-SN is supported by the Gordon and Betty Moore Foundation through grant GBMF5490 to the Ohio State University, and NSF grants AST-1515927 and AST-1908570. Development of ASAS-SN has been supported by NSF grant AST-0908816, the Mt. Cuba Astronomical Foundation, the Center for Cosmology and AstroParticle Physics at the Ohio State University, the Chinese Academy of Sciences South America Center for Astronomy (CAS-SACA), the Villum Foundation, and George Skestos. K.A.A. is supported by the Danish National Research Foundation (DNRF132). C.S.K. and K.Z.S. are supported by NSF grants AST-1515927 and AST-181440. C.S.K., K.Z.S., and B.J.S. are supported by NSF grant AST-1907570. M.A.T. acknowledges support from the DOE CSGF through grant DE-SC0019323. B.J.S. is also supported by NSF grants AST-1920392 and AST-1911074. Support for J.L.P. is provided in part by FONDECYT through the grant 1151445 and by the Ministry of Economy, Development, and Tourism's Millennium Science Initiative through grant IC120009, awarded to The Millennium Institute of Astrophysics, MAS. T.A.T. is supported in part by Scialog Scholar grant 24215 from the Research Corporation. P.S.C. is grateful for support provided by NASA through the NASA Hubble Fellowship grant #HST-HF2-51404.001 A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. K.D.F. is supported by Hubble Fellowship grant HST-HF2-51391.001 A, provided by NASA through a grant from the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. D.A.H. B. is supported by the National Research Foundation (NRF) of South Africa. M.G. is supported by the Polish NCN MAESTRO grant 2014/14/A/ST9/00121. The UCSC transient team is supported in part by NSF grant AST-1518052, NASA/Swift grant 80NSSC19K1386, the Gordon & Betty Moore Foundation, the Heising-Simons Foundation, and by a fellowship from the David and Lucile Packard Foundation to R.J.F.Some of the observations were obtained using the Southern African Large Telescope (SALT) as part of the Large Science Programme on transients (2016-2-LSP-001; PI: Buckley). Polish participation in SALT is funded by grant no. MNiSW DIR/WK/2016/07.This research uses data obtained through the Telescope Access Program (TAP), which has been funded by the National Astronomical Observatories of China, the Chinese Academy of Sciences, and the Special Fund for Astronomy from the Ministry of FinanceThis research was partially supported by the Australian Government through the Australian Research Council's Discovery Projects funding scheme (project DP200102471).Parts of this research were supported by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project number CE170100013.This project used data obtained with the Dark Energy Camera (DECam), which was constructed by the Dark Energy Survey (DES) collaboration. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, Center for Cosmology and AstroParticle Physics at the Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the Dark Energy Survey.