TITLE:   GCN CIRCULAR
NUMBER:  12381
SUBJECT: GRB 110918A: submm observations from APEX
DATE:    11/09/21 21:30:55 GMT
FROM:    Antonio Deugarte at IAA-CSIC  <deugarte@iaa.es>

A. de Ugarte Postigo (DARK/NBI), C. De Breuck (ESO), A. Lundgren
(ALMA/ESO) and M. Dumke (APEX/ESO) report on behalf of a larger
collaboration:

We have observed the afterglow candidate (Tanvir et al., GCN 12365) of the
bright IPN GRB110918A (Hurley et al., GCN 12357) using APEX/LABOCA at
Chajnantor (Chile). Observations where performed at 345GHz, using the
photometric mode, with mean epoch Sep. 21.184 UT (54.97 hr after the
burst) under good weather conditions (PWV ~ 0.25 mm). No flux is detected
at the position of the afterglow, with a 3-sigma upper limit of 15mJy.