Fig. 1.
Chandra broad (0.5–7 keV) band flux image covering Swift/BAT 90% error circle for the burst as reported in Barthelmy et al. (2017) (blue circle). In addition to the originally suggested counterpart (labeled here as 2SXPS J075542.5−293353), several faint X-ray sources (red ellipses) are detected by Chandra within the BAT confidence region and just outside of it. At least two of those (labeled AC1/2) appear to have no obvious optical (Gaia DR2, blue circles) or near-infrared (2MASS, green circles, AllWise, yellow crosses) counterparts and therefore we propose that they could be true soft-X-ray counterparts to the burst detected by BAT.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.