GRB 000623

J. Gorosabel (DSRI, Copenhagen),
S. Pascual, J. Gallego, J. Zamorano (UCM, Madrid),
A.J. Castro-Tirado (LAEFF-INTA, Madrid, and IAA-CSIC, Granada),
J.M. Castro Ceron (ROA, San Fernando),
S. Klose (Thueringer Landessternwarte, Tautenburg), 
J. Greiner (AIP, Potsdam),

report on behalf of a larger European collaboration:

"R-band images covering 90%  of the GRB  000623 error  box
 (GCN #730
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 ) were  acquired with the  2.2-m CAHA telescope,
 as follows:

    Date(UT)        T-T0(hr)   Exp.(s)   Seeing(")  Lim. Mag.
 ------------------------------------------------------------
  24.900 -- 24.908   29.1       120        1.2"       20
  27.860 -- 27.876  100.2       240        2.0"       20
 ------------------------------------------------------------

 Comparison between these two epoch observations did not reveal
 any object brighter than R ~ 19.7 showing a variation larger
 than 0.3 mag."

This message may be cited

K. Hurley, on behalf of the Ulysses GRB team, T. Cline, on behalf of
the Konus-Wind and NEAR GRB teams, and E. Mazets and S. Golenetskii,
on behalf of the Konus-Wind GRB team, report:

Ulysses, Konus-Wind, and NEAR observed this burst at 59762 s UT.
As observed by Ulysses, it had a duration ~5 s, a 25-100 keV
fluence of ~5x10^-6 erg/cm^2, and a peak flux over 0.5 s of
~6x10^-7 erg/cm^2 s.  We have localized it to an ~130 sq.
arcmin. error box whose preliminary, 3 sigma coordinates are:

    RA(2000)                 DEC(2000)
 11 h 15 m 41.48 s     10 o 42 '   2.50 "  (CENTER)
 11 h 15 m 56.55 s     10 o 41 '  53.52 "  (CORNER)
 11 h 14 m 17.45 s     11 o  0 '  30.38 "  (CORNER)
 11 h 17 m  4.21 s     10 o 23 '  34.43 "  (CORNER)
 11 h 15 m 26.41 s     10 o 42 '  11.33 "  (CORNER)

This localization can be improved.