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    Unveiling the enigma of ATLAS17aeu

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    Author
    Melandri, A.
    Rossi, A.
    Benetti, S.
    D’Elia, V.
    Piranomonte, S.
    Palazzi, E.
    Levan, A. J.
    Branchesi, M.
    Castro-Tirado, A. J.
    D’Avanzo, P.
    Hu, Y.-D.
    Raimondo, G.
    Tanvir, N. R.
    Tomasella, L.
    Amati, L.
    Campana, S.
    Carini, R.
    Covino, S.
    Cusano, F.
    Dadina, M.
    Della Valle, M.
    Fan, X.
    Garnavich, P. cc
    Grado, A.
    Greco, G.
    Hjorth, J. cc
    Lyman, J. D.
    Masetti, N.
    O’Brien, P.
    Pian, E.
    Perego, A.
    Salvaterra, R.
    Stella, L.
    Stratta, G.
    Yang, S.
    Di Paola, A.
    Caballero-García, M. D.
    Fruchter, A. S.
    Giunta, A.
    Longo, F.
    Pinamonti, M.
    Sokolov, V. V.
    Testa, V.
    Valeev, A. F.
    Brocato, E.
    Show allShow less
    Affiliation
    Univ Arizona, Steward Observ
    Issue Date
    2019-01-10
    Keywords
    gamma-ray burst: individual: GRB 170105A
    supernovae: general
    gravitational waves
    
    Metadata
    Show full item record
    Publisher
    EDP SCIENCES S A
    Citation
    Melandri, A., Rossi, A., Benetti, S., D’Elia, V., Piranomonte, S., Palazzi, E., ... & Hu, Y. D. (2019). Unveiling the enigma of ATLAS17aeu. Astronomy & Astrophysics, 621, A81.
    Journal
    ASTRONOMY & ASTROPHYSICS
    Rights
    © ESO 2019.
    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
    Aims. The unusual transient ATLAS17aeu was serendipitously detected within the sky localisation of the gravitational wave trigger GW 170104. The importance of a possible association with gravitational waves coming from a binary black hole merger led to an extensive follow-up campaign, with the aim of assessing a possible connection with GW 170104. Methods. With several telescopes, we carried out both photometric and spectroscopic observations of ATLAS17aeu, for several epochs, between similar to 3 and similar to 230 days after the first detection. Results. We studied in detail the temporal and spectroscopic properties of ATLAS17aeu and its host galaxy. Although at low significance and not conclusive, we found similarities to the spectral features of a broad-line supernova superposed onto an otherwise typical long-GRB afterglow. Based on analysis of the optical light curve, spectrum, and host galaxy spectral energy distribution, we conclude that the redshift of the source is probably z similar or equal to 0.5 +/- 0.2. Conclusions. While the redshift range we have determined is marginally compatible with that of the gravitational wave event, the presence of a supernova component and the consistency of this transient with the E-p-E-iso correlation support the conclusion that ATLAS17aeu was associated with the long gamma-ray burst GRB 170105A. This rules out the association of the GRB 170105A/ATLAS17aeu transient with the gravitational wave event GW 170104, which was due to a binary black hole merger.
    Note
    Open access journal.
    ISSN
    0004-6361
    1432-0746
    DOI
    10.1051/0004-6361/201833814
    Version
    Final published version
    Sponsors
    ASI [I/004/11/3]; Premiale LBT 2013; Spanish Ministry Project [AYA2015-71718-R]; FEDER funds; PRIN-INAF; VILLUM FONDEN Investigator grant [16599]; Russian Science Foundation [14-50-00043]; INAF
    Additional Links
    https://www.aanda.org/10.1051/0004-6361/201833814
    ae974a485f413a2113503eed53cd6c53
    10.1051/0004-6361/201833814
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