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    SPIRITS: Uncovering Unusual Infrared Transients with Spitzer

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    Kasliwal_2017_ApJ_839_88.pdf
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    Author
    Kasliwal, Mansi M. cc
    Bally, John cc
    Masci, Frank cc
    Cody, Ann Marie cc
    Bond, Howard E. cc
    Jencson, Jacob E. cc
    Tinyanont, Samaporn
    Cao, Yi cc
    Contreras, Carlos
    Dykhoff, Devin A.
    Amodeo, Samuel
    Armus, Lee
    Boyer, Martha cc
    Cantiello, Matteo cc
    Carlon, Robert L.
    Cass, Alexander C.
    Cook, David cc
    Corgan, David T.
    Faella, Joseph
    Fox, Ori D.
    Green, Wayne
    Gehrz, R. D.
    Helou, George
    Hsiao, Eric cc
    Johansson, Joel
    Khan, Rubab M. cc
    Lau, Ryan M.
    Langer, Norbert
    Levesque, Emily
    Milne, P. A. cc
    Mohamed, Shazrene
    Morrell, N. cc
    Monson, Andy
    Moore, Anna
    Ofek, Eran O. cc
    Sullivan, Donal O’
    Parthasarathy, Mudumba
    Perez, Andres
    Perley, D. cc
    Phillips, Mark cc
    Prince, Thomas cc
    Shenoy, Dinesh cc
    Smith, Nathan
    Surace, Jason cc
    Dyk, Schuyler D. Van
    Whitelock, Patricia A.
    Williams, Robert
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2017-04-19
    Keywords
    infrared: general
    novae, cataclysmic variables
    stars: AGB and post-AGB
    stars: mass-loss
    supernovae: general
    surveys
    
    Metadata
    Show full item record
    Publisher
    IOP PUBLISHING LTD
    Citation
    SPIRITS: Uncovering Unusual Infrared Transients with Spitzer 2017, 839 (2):88 The Astrophysical Journal
    Journal
    The Astrophysical Journal
    Rights
    © 2017. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We present an ongoing, five-year systematic search for extragalactic infrared transients, dubbed SPIRITS-SPitzer InfraRed Intensive Transients Survey. In the first year, using Spitzer/IRAC, we searched 190 nearby galaxies with cadence baselines of one month and six months. We discovered over 1958 variables and 43 transients. Here, we describe the survey design and highlight 14 unusual infrared transients with no optical counterparts to deep limits, which we refer to as SPRITEs (eSPecially Red Intermediate-luminosity Transient Events). SPRITEs are in the infrared luminosity gap between novae and supernovae, with [4.5] absolute magnitudes between -11 and -14 (Vega-mag) and [3.6]-[4.5] colors between 0.3 mag and 1.6 mag. The photometric evolution of SPRITEs is diverse, ranging from < 0.1 mag yr(-1) to > 7 mag yr(-1). SPRITEs occur in star-forming galaxies. We present an indepth study of one of them, SPIRITS 14ajc in Messier 83, which shows shock-excited molecular hydrogen emission. This shock may have been triggered by the dynamic decay of a non-hierarchical system of massive stars that led to either the formation of a binary or a protostellar merger.
    ISSN
    1538-4357
    DOI
    10.3847/1538-4357/aa6978
    Version
    Final published version
    Additional Links
    http://stacks.iop.org/0004-637X/839/i=2/a=88?key=crossref.2b8cbae0c71fb974ba32fceb754fdc0b
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/aa6978
    Scopus Count
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    UA Faculty Publications

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