Fig. 3
Color–color plot in the WISE W1, W2 and W3 bands for the infrared sources within the HESS J1943+213 error circle. 2MASS J19435624+2118233 is located within the so-called “Blazar strip”. No correction for extinction on interstellar dust has been applied. Note that BZB stand for BL Lac objects while BZQ for flat-spectrum radio quasars.
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