X-ray Swift observations of SN 2018cow

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

arxiv: 1807.06369 · v3 · pith:R7X63GMXnew · submitted 2018-07-17 · 🌌 astro-ph.HE · astro-ph.GA· astro-ph.SR

X-ray Swift observations of SN 2018cow

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

classification 🌌 astro-ph.HE astro-ph.GAastro-ph.SR

keywords x-raydaysobservationsopticalswifttransientvariabilityanalysis

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Supernova (SN) 2018cow (or AT2018cow) 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 ~62ks 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 circumstellar medium, perhaps related to previous mass ejections from a luminous-blue-variable-like progenitor.

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