Free Access

Fig. 2


Gray-scale reproductions of the WISE 2 (4.6 μm), WISE 3 (12 μm), and WISE 4 (22 μm) images of 2M1931+4324. The gray levels are linear and arbitrary, and have been chosen to emphasize the more relevant nebular features. 2M1931+4324 is arrowed in the WISE 2 image, while it is not detected in the WISE 3 and WISE 4 images.

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.