We present detailed fits of the spectral energy distributions ( SEDs ) of four submillimeter ( submm ) galaxies selected by the presence of a gamma-ray burst ( GRB ) event ( GRBs 980703 , 000210 , 000418 and 010222 ) .
These faint \sim 3 mJy submm emitters at redshift \sim 1 are characterized by an unusual combination of long- and short-wavelength properties , namely enhanced submm and/or radio emission combined with optical faintness and blue colors .
We exclude an active galactic nucleus as the source of long-wavelength emission .
From the SED fits we conclude that the four galaxies are young ( ages \mbox { } < 2 Gyr ) , highly starforming ( star formation rates \mbox { } \sim 150 { M } _ { \odot } yr ^ { -1 } ) , low-mass ( stellar masses \mbox { } \sim 10 ^ { 10 } { M } _ { \odot } ) and dusty ( dust masses \mbox { } \sim 3 \times 10 ^ { 8 } { M } _ { \odot } ) .
Their high dust temperatures ( T _ { d } \gtrsim 45 K ) indicate that GRB host galaxies are hotter , younger , and less massive counterparts to submm-selected galaxies detected so far .
Future facilities like Herschel , JCMT/SCUBA-2 and ALMA will test this hypothesis enabling measurement of dust temperatures of fainter GRB-selected galaxies .