The gamma-ray burst GRB 090313 observed.

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The gamma-ray burst GRB 090313 was observed by Markku Nissinen 13.3.2009 about one hour after the discovery of the GRB. Markku used the GRAS-04 telescope that is sited in Mayhill, NM, USA. The exposure times that Markku used were 300 sec., 360 sec. and 600 sec. Below are the results.

obs midpoint(UT)   exptime  mag(CR)   mag.err
2009-03-13 10:14:41  360 sec  16.5  +/-  0.3  (3 x 120 sec)
2009-03-13 10:27:59  300 sec  16.7  +/-  0.3
2009-03-13 10:39:53  600 sec  16.9  +/-  0.3