Fig. 3
Download original image
(a) SDSS optical spectrum of 4FGL J0943.7+6137, a source classified as a FSRQs, showing a quasar-like spectrum along with labels of some emission lines. (b) Optical spectrum of 4FGL J1223.0+1100, a classical BL Lac object, showing the almost featureless blue spectrum; (c) SDSS optical spectrum of 4FGL J1614.4+5028, which shows absorption and emission lines from the host galaxy.
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.