TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3285
SUBJECT: GRB 050416B: optical observations
DATE:    05/04/17 03:42:11 GMT
FROM:    Alberto Castro-Tirado at LAEFF-INTA  <ajct@laeff.esa.es>

M. Jelinek, A. de Ugarte Postigo (IAA-CSIC Granada),
P. Kubanek (ASU-CAS Ondrejov), T. J. Mateo Sanguino
(Univ. de Huelva), S. Castillo, J. Gorosabel, S.Guziy 
and A. J. Castro-Tirado (IAA-CSIC),

report:

"Following the detection by SWIFT/BAT of GRB 050416B
(Hullinger et al., GCN 3279), the 0.6m BOOTES-IR
telescope at IAA's Observatorio de Sierra Nevada
responded automatically at 23:13 UT (i.e. 38 minutes
after the event). Although we are still testing the                    
telescope during the commissioning phase, and the                    
near-IR camera is not yet installed, an optical camera                    
was available. A co-addition of first 20 R-band images                    
taken at that particular instrument reveals no optical                    
counterpart in the SWIFT/BAT error box down to R = 19.                    
The instrument sensitivity was highly compromised due                    
to the presence of the nearby moon. Additional info on                    
BOOTES-IR can be found at www.iaa.csic.es/BOOTES-IR.html."

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