[vsnet-alert 1596] (fwd) GRB 980326

[Taichi Kato <tkato>]

Forwarded message from Yoshida-san.

#####  mail-2  ################################################

Subject: BeppoSAX GRB980326: position update
Date: Fri, 27 Mar 1998 07:32:57 +0000 (GMT)


Dear observer,

herewith appended a IAUC we are going to submit reporting updated position
of GB980326

Luigi Piro



#----------------------------------#------------------------------------------#
 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
#__________________________________#___________________________________________#



GRB980326

G. Celidonio, A. Coletta, BeppoSAX Science Operation Center, Telespazio,
Rome, M. Feroci, L. Piro, P. Soffitta, Istituto Astrofisica Spaziale, CNR,
Rome, J. in 't Zand, Space Research Organization Netherlands (SRON),
Utrecht, J. Muller, BeppoSAX Science Data Center, Rome and SRON, and E. 
Palazzi, Istituto Tecnologie e Studio Radiazioni Extraterrestri, Bologna
report: 
"The BeppoSAX Gamma Ray Burst Monitor was triggered on Mar. 26.888125 U.T. 
coincident with BATSE trigger 6660. A quick look analysis shows a single
peak gamma-ray burst lasting about 5s and with a peak flux of 500 cts sE-1
in the range 40-700 keV.  The gamma-ray burst was also detected by the
unit 1 of the Wide Field Cameras (WFC1) with a peak flux of about 4 Crab
in the range 2-26 keV.  The position from a quick look analysis is R.A. =
08h36m26s, Decl. = -18o53'.0 (equinox 2000.0).  The accuracy of the
satellite attitude was not optimum, we adopt a error radius of 8'. Due to
sun constraints, the GRB location cannot be presently observed by BeppoSAX
Narrow Field Instruments." 
                                         




#####  mail-1  ################################################

Date: Fri, 27 Mar 1998 03:58:42 +0000 (GMT)

The BeppoSAX GRBM was triggered at 21:18:54 UT of March 26 by a GRB
(GB980326, also 
BATSE trigger 6660).
The event was detected by one of the WFC ((WFC1), with preliminary
position:
RA(2000)=129.15
Dec(2000)=-18.89
The  error radius at this stage is  10'.

BeppoSAX follow up will NOT be carried out due to visibility constraints
for the NFI.

Note on the error radius: the GRB was detected when the satellite was in a
not optimal attitude configuration.  We were able to check the aspect
solution by measuring the positions of Cyg X-1 and Cyg X-3 in the other
WFC (n.2). They agree with the nominal positions within 5'.  At this stage
of the analysis we estimate a total (sistematic+ statistical) error of
about 10'. 

Luigi Piro




#----------------------------------#------------------------------------------#
 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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