Supernova (SN) 2018cow is an optical transient detected in the galaxy CGCG 137–068. It has been classified as a 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 days. We found a variable behavior in the 0 . 3 − 10 keV X-ray light curve of SN 2018cow, with variability timescales of days. The observed X-ray variability could be due to the interaction between the SN ejecta and a non-uniform circum-stellar medium, perhaps related to previous mass ejections from a luminous-blue-variable-like progenitor.
Document Object Identifier (DOI)
Oxford University Press
Rivera Sandoval, L.E., Maccarone, T.J., Corsi, A., Brown, P.J., Pooley, D., & Wheeler, J.C. (2018). X-ray Swift observations of SN 2018cow. Monthly Notices of the Royal Astronomical Society: Letters, 480(1), L146-L150. doi: 10.1093/mnrasl/sly145
Monthly Notices of the Royal Astronomical Society: Letters