GCN Circular 331
Subject
GRB990510: photometric and spectroscopic observations with the VLT
Date
1999-05-18T17:23:27Z (25 years ago)
From
Klaus Beuermann at Goettingen Obs, Ger <beuermann@uni-sw.gwdg.dew>
K. Beuermann, K. Reinsch, F.V. Hessman (Goettingen Observatory)
report:
Further photometry and spectroscopy performed by K. Reinsch with
the ESO VLT and the FORS1 instrument as part of the FORS Consortium
Guaranteed Time Observations have revealed the nature of objects
close to the optical transient. The two objects 3 and 12 arcsec
north of the OT with V = 20.0 and V = 23.7 are cool foreground
stars of spectral types dM0 and about dM3. The object 2 arcsec
south of the OT with V = 22.7 is probably a star of somewhat
earlier spectral type. A spectrum of the OT taken on May 14.25 is
noisy but showed no obvious features. A V-band image taken on May
18.36 with the VLT under 0.9arcsec seeing shows the OT at magnitude
24.5 with no evidence so far of the host galaxy
(http://www.uni-sw.gwdg.de/~hessman/GRB/).
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