GRB090904B (Swift Trig.361831)

TRIGGER : Swift BAT UT 01:24:18 04-Sep-2009

AG detection by XRT at 01:26:32.3 04-Sep-2009

AG limit by UVOT at 138sec after BAT

MOA Observations

Status : OBSERVATION

GCN Circular 9892

• Exposure-1
  UT 07:34:56.9 04-Sep-2009; 60 sec
  Observer : D.Suzuki
  Filter : MOA-Red
  
  

  small red curcle shows Swift XRT error circle (1.8arcsec)

  
  
• Exposure-2
  UT 09:51:28.8 04-Sep-2009; 60 sec
  Observer : D.Suzuki
  Filter : MOA-Red
  
  

  small red curcle shows Swift XRT error circle (1.8arcsec)

  
  

IRSF Observations

Status : OBSERVATION

GCN Circular 9931

• Exposure-1
  UT 17:6:57.7 04-Sep-2009; 300 sec
  Observer : T.Yoshikawa, T.Suenaga
  
  Filter : J
  
  
  
  Filter : H
  
  
  
  --> Filter : Ks