[vsnet-grb-info 18073] SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 690197)

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  19521
SUBJECT: SWIFT J174540.2-290037, Swift-BAT refined analysis (trigger 690197)
DATE:    16/06/11 20:33:45 GMT
FROM:    Hans Krimm at NASA-GSFC  <hans.a.krimm at nasa.gov>

C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU),
T. N. Ukwatta (LANL) (i.e. the Swift-BAT team):

Using the data set from T-239 to T+963 sec from the recent telemetry downlink,
we report further analysis of SWIFT J174540.2-290037 (trigger# 690197;
Barthelmy, et al., GCN Circ. 19515).  The BAT ground-calculated position is
RA, Dec = 266.376, -28.978 deg which is
    RA(J2000)  =  17h 45m 30.2s
    Dec(J2000) = -28d 58' 39.1"
with an uncertainty of 2.9 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 78%.

The source was in the field of view from T-70 sec to T+640 and was at a
fairly steady rate during this time period.

The time-averaged spectrum from T+0.00 to T+384.00 sec is best fit by a simple
power-law model.  The power law index of the time-averaged spectrum is
1.63 +- 0.29.  The fluence in the 15-150 keV band is 1.4 +- 0.3 x 10^-6 erg/cm2. 
  All the quoted errors are at the 90% confidence
level.

The results of the batgrbproduct analysis are available at
http://gcn.gsfc.nasa.gov/notices_s/690197/BA/