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GCN Circular 2661

Subject

GRB 040825A: Optical observations.

Date

2004-08-25T22:05:54Z (20 years ago)

Edited On

2024-11-18T10:09:50Z (2 months ago)

From

Javier Gorosabel at LAEFF-INTA, Madrid <jgu@laeff.esa.es>

Edited By

Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Leo P. Singer at NASA/GSFC <leo.p.singer@nasa.gov>

P. Tristram (Univ. of Canterbury, New Zealand), 
A. de Ugarte Postigo, J. Gorosabel, A.J. Castro-Tirado, 
M. Jelinek (IAA-CSIC, Granada, Spain),
J.M. Castro Cerón (STScI, Baltimore, USA)
Ph. Yock (Univ. of Auckland, New Zealand),
report:

 "We have imaged the entire GRB 040825A error box 
 provided by HETE-2 (trigger # 11553) with the 0.6-m  
 telescope (+MOA camera) at Mt.John Observatory as 
 follows:
  

  Date of Aug.    Exp.Time   Error box     Lim. Mag.
   2004 UT          (s)      coverage (%)  (3 sigma)
 ---------------------------------------------------
  25.4028-25.4346  4x300     ~75(North)     R~21.1
  25.5292-25.5426  2x300     ~25(South)     R~20.7
 ---------------------------------------------------

 Observations were performed with the MOA broad R-band 
 filter (similar to Ic). Apart from several slow moving 
 sources, visual comparison of the stacked image with 
 the DSS-2 plates revealed no variable source."

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