[vsnet-alert 2963] GRB990510: NFI X-ray source

[Luigi Piro - BeppoSAX Mission Scientist <piro@ias.rm.cnr.it>]

BeppoSAX MAIL n. 99/8: GRB990510: possible X-ray afterglow

A BeppoSAX follow-up of GRB990510 started about 8 hr after the burst.
Preliminary analysis of the first two orbits of the MECS data at SOC shows
a previously unknown strong source in the center of the WFC error circle.

Preliminary coordinates  are:
R.A.(2000)= 204.605
DEC(2000)= -80.490

The error radius is 1.5'

Considering its strength, this X-ray source is likely the X-ray
afterglow of GB990510. BeppoSAX is continuing its observation.

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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