TITLE:   GCN CIRCULAR
NUMBER:  7597
SUBJECT: GRB 080413A: REM detection of the NIR Afterglow
DATE:    08/04/13 09:06:15 GMT
FROM:    Angelo Antonelli at Obs. Astro. di Roma  <a.antonelli@oa-roma.inaf.it>

L.A. Antonelli, P. D'Avanzo, D. Malesani, S. Covino, D. Fugazza, L.  
Calzoletti, S. Campana, G. Chincarini, M.L. Conciatore, S. Cutini, V.  
D'Elia, F. D'Alessio, F. Fiore, P. Goldoni, D. Guetta, C. Guidorzi,  
G.L. Israel, E. Maiorano, N. Masetti, A. Melandri, E.J.A. Meurs, L.  
Nicastro, E. Palazzi, E. Pian, F. Piranomonte, S. Piranomonte, L.  
Stella, G. Stratta, G. Tagliaferri, G. Tosti, V. Testa, S.D. Vergani,  
and F. Vitali, report on behalf of the REM team:

The robotic 60-cm REM telescope located at La Silla (Chile) observed  
automatically the field of the GRB 080413A (Beardmore et al., GCN  
7594) starting about 1.3 hours after the burst due to object  
visibility constraints.
Observation started as soon as the object is risen so the Airmass was  
large.

A preliminary investigation of our earliest images (R,z,J,H,K) showed  
that the candidate optical counterpart (Rykoff et al. GCN 7593,  
Beardmore et al., GCN 7594, Klotz et al., GCN 7595) is observed in  
all bands. At the beginning of REM observation, the object had a H  
mag of about H=15.2 calibrated against 2MASS and not corrected for  
galactic extinction.

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