Free Access

Fig. 3


Progenitor identification of PTF12os found by registering 8 ground-based NTT/EFOSC i-band images of PTF12os to a stacked pre-explosion HST ACS F814W image. The field of view shown here is . North is up and east is to the left. The white circles show the average position of the centroid of PTF12os after image registration with a radius reflecting the statistical error from 7 image registrations. The smaller circle represents a 2σ uncertainty and the larger circle represents a 5σ uncertainty. The 2σ uncertainty is only shown in the zoomed inset. The pink circles indicate the centroid of the possible progenitor measured in the HST image, with a radius representing the 2σ uncertainty in its centroid.

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.