NuSTAR observations of AT2018cow reveal a hard X-ray component of emission above 15 keV
Abstract
NuSTAR started observing the transient AT2018cow (ATel #11727) on June 23 17:31:09 UT under Director Discretionary Time (DDT, PI Margutti). From the analysis of 28 ks of data, we find the following preliminary results: AT2018cow is very well detected with signal in excess of the background up to 60 keV. NuSTAR data in the 3-60 keV range can be fit with a simple power-law spectral model with best fitting photon index Gamma=1.20 + 0.03 (1 sigma c.l.).
- Publication:
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The Astronomer's Telegram
- Pub Date:
- June 2018
- Bibcode:
- 2018ATel11775....1M
- Keywords:
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- Supernovae