Free Access

Fig. 5

image

TS maps for the region around NGC 4151; in all panels the green cross shows the location of NGC 4151 and the orange cross the location of source S. In all panels only the 3FGL sources were subtracted from the maps, except for panel b), where an additional point source was added at the position of NGC 4151. a) The 8° × 8° degrees region with a pixel size of . The map was built for the energy range 0.2–30 GeV, neglecting period S (see text); the red and white crosses indicate the location of 3FGL sources. b) The same as in a), but the model includes a point source at the position of NGC 4151 to compensate for the residual seen in a). c) The degree region with a pixel size of 0.̊075 for 0.2–30 GeV for period S. d) The region with a pixel size of 0.̊075 for 0.2–6 GeV and the full period of 6.4 years; the black cross shows the location of a point source found with gtfindsrc under the assumption that the residual seen in the map is produced by a single source; source S is not seen in this map because photons with E> 10 GeV are excluded.

This figure is made of several images, please see below:

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.