VLBA images of 12 FLASH HI absorbers at z=0.44-0.68 show that the radio core can account for the full absorption in 7 sources, raising the estimated HI optical depths by up to a factor of three after covering-factor corrections.
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VLBI studies of FLASH H I 21-cm absorbers -- I
VLBA images of 12 FLASH HI absorbers at z=0.44-0.68 show that the radio core can account for the full absorption in 7 sources, raising the estimated HI optical depths by up to a factor of three after covering-factor corrections.