[vsnet-grb-info 3519] GRB 060719: near-infrared afterglow

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5354
SUBJECT: GRB 060719: near-infrared afterglow
DATE:    06/07/21 09:54:22 GMT
FROM:    Daniele Malesani at SISSA-ISAS,Trieste,Italy  <malesani at sissa.it>

D. Malesani (SISSA/ISAS), J. Fynbo (NBI-DARK), P. D'Avanzo (INAF-OABr), 
S. Covino (INAF-OABr), D. Fugazza (INAF-OABr), P. Jakobsson (Univ. 
Hertfordshire), P.M. Vreeswijk (ESO), report:

We observed again the field of GRB 060719 (Stamatikos et al., GCN 5339; 
Conciatore et al., GCN 5348) with the ESO VLT equipped with the ISAAC 
instrument. Observations were carried out in the Ks filter, with mean 
time Jul 20.41 (1.13 days after the GRB).

With respect to a previous observation (Malesani et al., GCN 5350), we 
observe significant fading of object #2 (Fugazza et al., GCN 5347). This 
object is thus the optical/NIR afterglow of GRB 060719. The observed 
fading, by 2.0 +- 0.2 mag, corresponds to a power-law decay slope alpha 
= 0.9 +- 0.1.

We acknowledge excellent support from the ESO staff, and in particular 
Daniel Kubas.

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