[vsolj-alert 327] [vsnet-alert 2997] BeppoSAX MAIL n. 99/9: New fast X-ray transient

[Taichi Kato <tkato@kusastro.kyoto-u.ac.jp>]

[vsnet-alert 2997] BeppoSAX MAIL n. 99/9: New fast X-ray transient

　今日の日本時間の昼前、以下のＸ線トランジェント天体が発見されました。
　観測条件の恵まれた位置で、最大強度 1 Crab に達したそうです。ガンマ線バー
　ストと関連している可能性もあり、また以前のCI Camの例もあり、この天域で何
　か起きていないか確認する値打ちがあります。誤差 3' なので、ＣＣＤ撮像でも
　確実に視野に入るでしょう。

BeppoSAX MAIL n. 99/9: New fast X-ray transient

Note: we have decided to distribute this info to the BeppoSAX GRB alert
list due to the potential association of these events (or some of those)
with GRB.


On May 20 at 2:02:58 UT a fast X-ray transient, which we designate 1SAX
J0835.9+5118, was detected by one of the BeppoSAX WFC (n.1). The event
lasted about 10 s., with a peak flux of about 1 Crab in the 2-25 keV
range.  The position is (equinox 2000) R.A.=128.98, decl=51.31, with an
error radius of 3'. No previously known X-ray source lies in the error
box.  At a preliminary analysis no simultaneous signal was detected by the
GRBM (40-700 keV).  Follow up observations are encouraged to investigate
the nature of this object. 


Luigi Piro

BeppoSAX Mission Scientist



#----------------------------------#------------------------------------------#
 Luigi Piro                        | E-mail:
 Istituto Astrofisica Spaziale     |              piro@alpha1.ias.rm.cnr.it
 C.N.R.                            | SAX program: saxsci@alpha1.ias.rm.cnr.it 
 Via Fosso del Cavaliere           | phone: -39-06-4993-4007 
 I-00133 Roma                      | phone BeppoSAX center: -39-06-4079-6393
 Italy                             | fax(CNR)  : -39-06-20660188
#__________________________________#___________________________________________#

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