[vsnet-alert 10580] (fwd) Low level activity of V4641 Sgr in X-rays

[Makoto Uemura]

I forward the message from Dr. Kazutaka Yamaoka

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Low level activity of V4641 Sgr in X-rays

Dear colleagues,

 The blackhole binary V4641 Sgr shows a low level activity at ~3 mCrab in X-rays.
 The RXTE/PCA light curve is publicly available at the web site:
   http://lheawww.gsfc.nasa.gov/users/craigm/galscan/html/XTE_J1819-254.html

 Further multi-wavelength observations are encouraged.  
 I have requested Swift ToO observations for 2ksec exposure.  

 I would like to thank Dr. Craig Markwardt for telling me the source activity
   and his kind help.

 Best regards,
 Kazutaka Yamaoka