[AAVSO-HEN] GRB 070412: IAC80 optical afterglow candidate

[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:  6279
SUBJECT: GRB 070412: IAC80 optical afterglow candidate
DATE:    07/04/12 04:58:25 GMT
FROM:    Martin Jelinek at Inst.Astrophys.Andalucia,Granada  <mates at iaa.es>

M. Jelinek (IAA-CSIC, Granada). J. A. Caballero (MPIA
Heidelberg), A. de la Nuez (IAC La Laguna) and A. J.
Castro-Tirado (IAA-CSIC), on behalf of larger colaboration.

report:

"We have observed the field of GRB070412 (Romano et al. GCNC
6273) with the IAC80 telescope at Observatorio del Teide in I
filter, starting at 03:02 UT, i.e. 1.6 h after the trigger. 

Inspection of a 30 minute combined image shows a faint
(4-sigma) source at 

	12:06:10.416,+40:08:24.12 +-0.5" (J2000)
	
with the I-band brightness 21.5+-0.5. The object is not
consistent with the candidate of Malesani et al. (GCN 6276).
The identification map is at

	http://www.iaa.es/~mates/grb070412id.jpg.

Further observations are needed to confirm the transient
nature of this object.