Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 480, Issue 1, Pages L146-L150Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnrasl/sly145
Keywords
gamma-ray burst: general; supernovae: individual: SN 2018cow; X-rays: stars
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Funding
- STFC [ST/P002218/1, ST/M003035/1, ST/P006892/1, ST/M000095/1] Funding Source: UKRI
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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 similar to 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.
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