Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 734

GRB 000620, optical observations
2000-06-30T15:02:17Z (24 years ago)
Javier Gorosabel at LAEFF-INTA, Madrid <>
J. Gorosabel  (DSRI, Copenhagen),
A. Henden (USRA/USNO)  on behalf of the USNO GRB team,
A.J. Castro-Tirado (LAEFF-INTA, Madrid, and IAA-CSIC, Granada),
P. Gutierrez (IAA-CSIC, Granada),
S. Klose (Thueringer Landessternwarte, Tautenburg), 
J. Greiner (AIP, Potsdam),
J.M. Castro Ceron (ROA, San Fernando),
E. Costa and M. Feroci, on behalf of the BSAX team (IAS, Rome),

report on behalf of a larger European collaboration:

"We have obtained R-band images of the GRB 000620 field (GCN #716,  
 #722)  with the 1.0-m USNO and 2.2-m CAHA telescopes, as follows: 

      Date(UT)      T-T0(hr)    Exp.(s)  Seeing(")    Lim. Mag.
  20.465 -- 20.472   5.67      2x300       3.0"         19.8
  20.898 -- 20.905  16.08        600       2.0"         21.7
  21.872 -- 21.879  27.45        600       1.5"         22.1
  22.869 -- 22.885  63.49      3x600       1.5"         22.8

 No object within the BSAX WFC error box brighter than R ~ 19.5
 is found to exhibit a variation larger than 0.25 mag."

This message is citable.
Looking for U.S. government information and services? Visit