[vsnet-alert 7422] Fw: V4641 Sgr radio variability continues

[Daisaku NOGAMI <nogami@kwasan.kyoto-u.ac.jp>]

Begin forwarded message:

Date: Sat, 29 Jun 2002 09:49:37 -0600
From: Michael Rupen <mrupen@aoc.nrao.edu>
Subject: V4641 Sgr radio variability continues


Dear colleagues,

  here are the latest VLA measurements of V4641 Sgr, all at 8.46 GHz:
   Date  
  5jun02  0.    mJy   0.050   mJy/beam 
 13jun02  0.097       0.064            [not a detection]
 16jun02  0.44        0.084   
 24jun02  1.91        0.063   
 27jun02  0.55        0.088   
 28jun02  2.38        0.118   
 29jun02  0.76        0.102   

So V4641 Sgr remains active, with mini-flares every few days (or more often;
these observations were all just a couple minutes long).  The next VLA runs
are on
   30jun02  [3mins only]
    1jul02  08:04 - 10:04 UT
    2jul02  04:00 - 05:00 UT
    5jul02  06:18 - 08:48 UT
I will spend much of this time on V4641 Sgr, checking for short-term
variability, and trying to measure the radio spectrum.  Simultaneous
observations at other wavelengths would be very useful.

  Clear skies,

            Michael Rupen
            NRAO/Socorro
            mrupen@nrao.edu

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