TITLE:   GCN CIRCULAR
NUMBER:  16974
SUBJECT: GRB 141026A: IRAM 30m millimetre observations
DATE:    14/10/28 20:26:53 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct@iaa.es>

A. J. Castro-Tirado, J. C. Tello, J. Gorosabel (IAA-CSIC Granada), C.
Kramer, I. Hermelo, G. Paubert, A. Sievers (IRAM Granada) and  J. G.
Staguhn (NASA/GSFC Greenbelt),on behalf of a larger collaboration, report:

Following the detection of GRB 141026A by Swift (Hagen et al. GCNC
16950), observations with the IRAM 30m antenna (+GISMO) at Pico Veleta
(Spain) were triggered on 26-27 Oct. At the position of the optical
afterglow (Littlejohns et al. GCNC 16952, Varela et al. GCNC 16953,
Gorosabel et al. GCNC 16954), we detect no mm afterglow (at 2 mm) down to
a preliminary flux density of 1.2 mJy (3 sigma) on Oct 26, 14:30 UT (mid
time). We acknowledge excellent assistance from the IRAM observers.