TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4899
SUBJECT: GRB 060218/SN 2006aj, LNA optical observation
DATE:    06/03/21 00:14:36 GMT
FROM:    Antonio Pereyra at IAG-U.Sao Paulo  <antonio@astro.iag.usp.br>

A. Pereyra and A. M. Magalhães (IAG, Univ. of São Paulo) report: 

We obtained optical imaging of GRB 060218/SN 2006aj (Cusumano et al., GCN 4775) on  
2006/March 3.958 (UT) using the IAG-USP 60cm telescope at the Laboratório Nacional de 
Astrofísica (LNA), Brazil. The observation was made under poor sky conditions and 
through high airmass (>2). A 90-second exposure in the I filter yielded I = (17.06 +/- 
0.10) mag. The zero point calibration was obtained using comparison stars in the GRB 
field from Hicken et al. (GCN 4898) and Modjaz et al. (astro-ph/0603377). 

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