If you're asking whether we could image the actual magnetar (assuming that's what they observed) with JWST, the answer is no. If it's a magnetar, the object i

If you're asking whether we could image the actual magnetar (assuming that's what they observed) with JWST, the answer is no. If it's a magnetar, the object itself is less than 100 km in diameter. JWST has an angular resolution of about .1 arc seconds, which at 4000 light years distance means it can resolve things that are billions, not tens, of kilometers (think the size of Pluto's orbit) in extent. The magnetar is probably also dark in the infrared spectrum JWST can see well.