TITLE:   GCN CIRCULAR
NUMBER:  22854
SUBJECT: GRB 180626A: LCO Haleakala observations
DATE:    18/06/26 12:13:43 GMT
FROM:    Cristiano Guidorzi at Ferrara U,Italy  <guidorzi@fe.infn.it>

R. Martone, C. Guidorzi (U. Ferrara), S. Kobayashi (LJMU), C.G. Mundell 
(U. Bath), A. Gomboc (U. Nova Gorica), I.A. Steele (LJMU), A. Cucchiara 
(U. of Virgin Islands) on behalf of a large collaboration report:

The LCO 2-m unit at Haleakala Observatory (Hawaii), former FTN, began 
observing Swift and INTEGRAL GRB 180626A (Evans et al. GCN 22850; Gotz 
et al. GCN 22851) on June 26, 08:41:11 UT (20 min after the GRB trigger 
time) with the SDSS ri filters. The optical counterpart (Evans et al.) 
is clearly detected  with the following magnitudes:

Mid Time since GRB    Exposure         Filter        Magnitude
(hrs)                  (s)
------------------------------------------------------------------
0.424                 5x120            SDSS-R        20.96 +- 0.12
0.617                 5x120            SDSS-I        20.53 +- 0.12
------------------------------------------------------------------

as calibrated against nearby SDSS objects.