gravitational-lens-B0218+357

This Hubble image of the gravitational lens B0218+357 reveals two bright sources separated by about a third of an arcsecond, each an image of the background blazar. Faint spiral arms belonging to the lensing galaxy also can be seen. B0218+357 boasts the smallest separation of lensed images currently known. The A image (4 o’clock position) is where changes are first observed and is significantly fainter than the B image (center) at optical wavelengths.

Posted 
January 7, 2014
 in 

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