X-ray Swift observations of SN 2018cow

L. E.Rivera Sandoval, T. J. Maccarone, A. Corsi, P. J. Brown, D. Pooley, J. C. Wheeler

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Supernova (SN) 2018cow is an optical transient detected in the galaxy CGCG 137-068. It has been classified as an SN due to various characteristics in its optical spectra. The transient is also a bright X-ray source. We present results of the analysis of ~62 ks of X-ray observations taken with the Neil Gehrels Swift Observatory over 27 d. We found a variable behaviour in the 0.3-10 keV X-ray light curve of SN 2018cow, with variability time-scales of days. The observed X-ray variability could be due to the interaction between the SN ejecta and a non-uniform circumstellar medium, perhaps related to previous mass ejections from a luminous-blue-variable-like progenitor.

Original languageEnglish
Pages (from-to)L146-L150
JournalMonthly Notices of the Royal Astronomical Society: Letters
Issue number1
StatePublished - Oct 11 2018


  • Gamma-ray burst: general
  • Supernovae: individual: SN 2018cow- X-rays: stars


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