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Optical Counterpart of GRB990510

• Finding chart in the I-band. The image size is 3.5'×3.5', North is up and East is to the left.



• Light curve - mag vs JD Hel - (available also in Postscript format)



• Light curve - mag vs log(t-T0) - (available also in Postscript format)



• Enlargement of I-band image of GRB990510 area. Faint galaxy located about 2'' south from the GRB 990510 optical counterpart was suggested to be possible host galaxy by Kaluzny et al., GCN #314 .



• Lazzati et al., GCN #325, suggested, however, that the object is a regular star based on VLT image. We confirm that based on our latest V-band image composed of four 600 sec exposures.



• V-band photometry data file containing 4 columns: Hel.JD - 2450000, V magnitude, magnitude error and log(t-T0).

• I-band photometry data file containing 4 columns: Hel.JD - 2450000, I magnitude, magnitude error and log(t-T0).

• VI photometry of three nearby comparison stars

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