[vsnet-chat 2453] GRB 991208

[aah@nofs.navy.mil]

Latest results from Dec 14.14 UT show the optical
transient at R=21.6.  While amateurs might still be
able to detect it, the OT is near twilight and you
might not be able to get enough integration time
before the sky background swamps you (an advantage
of big telescopes -- they can use shorter exposure
times and get sufficient S/N before twilight).
Still, those of you with big 'scopes might give it
a shot.  This one is fading slowly and is unusually
blue and so is a rare bird.
  Personally, I have yet to see it.  The 1.0-m telescope
(the ORIGINAL R-C telescope, by the way) was built
in the 1930's and has a limited hour-angle range.
Tonight will be the first night that it enters the
proper range while it is dark enough.  Even so, I
have to hope that the jet stream moves far enough
north that the seeing improves.
Arne

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