| Description |
We propose observations in the two reddest PACS and all three SPIRE bands
of the host galaxies of a sample of five GRBs. The sample was carefully
selected based on the detection of large extinction in the GROND SED of
the GRB afterglow, and all hosts have a large amount of multiwavelength
data in hand, including sensitive submm observations. Together with the
Herschel data, we will model the SEDs from the UV to the submm with the
broadband galaxy SED fitting software, CIGALE, to derive bolometric
luminosities and SFRs, and constrain dust mass and dust temperature. We
will compare the dust properties of the whole galaxy with that derived from
the GRB afterglow to constrain the dust clumpiness (covering fraction, total
extinction). We will also compare the dust and stellar components of the
galaxies, and investigate the GRB hosts in the context of other high-z
galaxies. The Herschel data will provide indispensable observations of the
peak of the thermal dust emission component, which accompanied with our
APEX and SCUBA submm observations will provide the most accurate
measurements to date of the extinction and emission properties of dust within GRB
host galaxies. |
