[vsnet-campaign-v4641sgr 100] Fw: V4641 Sgr re-appears as a radio source!

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

Begin forwarded message:

Date: Wed, 26 Jun 2002 07:06:30 -0600
From: Michael Rupen <mrupen@aoc.nrao.edu>
To: vsnet-adm@kusastro.kyoto-u.ac.jp
Subject: V4641 Sgr re-appears as a radio source!


Dear colleagues,
  we've just submitted an IAU circular, reporting renewed radio activity
in V4641 Sgr in mid- to late-June (latest detection was on 24jun02).  This
contrasts with several years of roughly-monthly monitoring at the VLA, which
until the May outburst detected nothing to rms levels of order 50-150 microJy/beam.
The current detections, showing variability up to a factor 100 in flux density on
timescales less than a day, therefore represent a new state for this object.
Continued optical, X-ray, and radio monitoring is of great interest.  I would
also be very interested to hear of any constraints on short timescale variability
in June...

  Cheers,

              Michael Rupen
              NRAO/Socorro
              mrupen@nrao.edu

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