[vsolj-alert 144] GB980613 follow up with NFI

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

GB980613 follow up with NFI

　６／１３のガンマ線バーストですが、Ｘ線のafterglowらしきものが受かっている
　ようです。位置もかなり明確になりましたので、特に Source A を中心に可能で
　あれば深いＣＣＤ撮像で観測を試みていただければと思います。等級は何とも言
　えませんが、先日の富山天文台の画像で19-20等が検出できましたので、数十cm
　以上の口径で可能かも知れません。USNOチャートは別に作成する予定です。

From owner-vsnet-alert@kusastro.kyoto-u.ac.jp Tue Jun 16 08:43 JST 1998
Date: Tue, 16 Jun 1998 08:43:54 +0900 (JST)
From: Taichi Kato <tkato>
Subject: [vsnet-alert 1886] BeppoSAX GRB 980613 BFI follow up

Date: Tue, 16 Jun 1998 00:12:58 +0000 (GMT)
From: Luigi Piro - BeppoSAX Mission Scientist <saxsci@ias.rm.cnr.it>
Subject: [vsnet-alert 0] BeppoSAX GRB: GB980613 NFI follow up  


BeppoSAX GRB MAIL N. 98/21
^^^^^^^^^^^^^^^^^^^^^^^^^^

GB980613: follow up with NFI

Two previously unknown X-ray sources have been found in the WFC error
circle by the MECS during the follow up observation started 9 hrs after
the GRB.

Source A is at
R.A.(2000)= 10h17m53s
Dec.(2000)= +71d27'24"

Source B is at
R.A.(2000)= 10h18m04s
Dec.(2000)= +71d33'30"

The error radius is 50".

Source B does not show substantial variability.
Source A shows a rather strong decay during the observation, and is very
likely the X-ray afterglow of GB980613


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: -39-6-4993-4007 
 I-00133 Roma                      | phone BeppoSAX center: -39-6-4079-6393
 Italy                             | fax(CNR)  : -39-6-20660188
#__________________________________#___________________________________________#

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