[AAVSO-HEN] GRB 071109: BOOTES-2 prompt optical observations

[grb at aavso.org]

The following is a GCN Circular circulated via the AAVSO network.
For an archive and more information on circulars visit:
http://lheawww.gsfc.nasa.gov/docs/gamcosray/legr/bacodine/gcn3_archive.html

TITLE:   GCN CIRCULAR
NUMBER:  7047
SUBJECT: GRB 071109: BOOTES-2 prompt optical observations
DATE:    07/11/09 23:36:20 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct at iaa.es>

Antonio de Ugarte Postigo (ESO Santiago), Martin Jelínek,
Petr Kubánek, Alberto J. Castro-Tirado (IAA-CSIC Granada)
and Lola Sabau-Graziati (INTA Madrid), on behalf of the
BOOTES collaboration,

report:

"The robotic telescope BOOTES-2 located at Estación Experimental
de La Mayora (EELM-CSIC) in southern Spain followed automatically
the INTEGRAL GRB 071109 (Mereghetti et al, GCN 7046). Images
were taken under non-optimum conditions (GRB location at high
airmass and thick cirruses passing) starting 59s after the GRB (31s
after the GCN notice).

We do not detect any new source within the INTEGRAL/IBIS error
box down to our unfiltered, USNO-A2 calibrated magnitude of ~13.0
in our first exposures ranging between 20:37:05 and 20:37:20 UT.
Further analysis is ongoing.

Note the moderate extinction in the line of sight: E(B-V) = 0.61,
i.e. Ar = 1.46."