TITLE:   GCN CIRCULAR
NUMBER:  14535
SUBJECT: GRB 130502A: OSN and IAC80 I-band observations
DATE:    13/05/03 00:16:29 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu@iaa.es>

J. Gorosabel (IAA-CSIC/UPV-EHU), A. de Ugarte Postigo (IAA-CSIC/DARK-NBI),
J.C. Tello (IAA-CSIC),  A.J. Castro-Tirado (IAA-CSIC), J. Cepa (IAC), D.
Jimenez-Mejias (IAC), R. Alonso (IAC), R. Sanchez-Ramirez (IAA-CSIC), V.
Casanova (IAA-CSIC), report on behalf of a larger collaboration:

We observed the GRB 130502A (Troja et al. GCN 14527) optical afterglow
(Malesani et al. GCN 14531; de Ugarte Postigo et al. GCN 14533) in I-band
with both the 1.5m OSN and 0.82m IAC80 telescopes as follows;

  Tel.  Hr post-GRB  Texp  Vega(Mag)
 -------------------------------------
 OSN    3.13-3.71  10x200s  > 22.0
 IAC80  3.43-5.14  16x300s 22.75+/-0.35
 -------------------------------------

calibrated against the USNO B1.0 catalogue.