| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
2:19:52 UTC |
GCN_circulars,Swift Det |
| ra |
223.0370° |
Swift |
| decl |
-28.5420° |
Swift |
| pos_error |
1.79e-02° |
Swift |
| T90 |
3.3 s |
Swift |
| T90_start |
2:19:52 UTC |
Swift |
| fluence |
3.50e-07 erg/cm² |
Swift |
| T100 |
3.3 s |
|
| GBM_located |
False |
|
| mjd |
55467.09712962963 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB100928A |
| ra |
223.0375° |
| decl |
-28.5667° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB100928A |
| t_trigger |
2:19:52 UTC |
| ra |
223.0370° |
| decl |
-28.5420° |
| pos_error |
1.79e-02° |
| T90 |
3.3 s |
| fluence |
3.50e-07 erg/cm² |
| GCN 11310 table |
|---|
| GRB_name |
GRB100928A |
| GCN_number |
11310 |
| Detection_method |
Swift Det |
| t_trigger |
2:19:52 UTC |
| ra |
223.0360° |
| decl |
-28.5610° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 11310
SUBJECT: GRB 100928A: Swift detection of a burst
DATE: 10/09/28 02:34:10 GMT
FROM: Valerio D'Elia at ASDC
V. D'Elia (ASDC), S. T. Holland (CRESST/USRA/GSFC),
E. A. Hoversten (PSU), H. A. Krimm (CRESST/GSFC/USRA),
C. B. Markwardt (NASA/GSFC), M. H. Siegel (PSU),
M. Stamatikos (OSU/NASA/GSFC), G. Stratta (ASDC) and
E. Troja (NASA/GSFC/ORAU) report on behalf of the Swift Team:
At 02:19:52 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 100928A (trigger=435160).
The BAT on-board calculated location is RA, Dec 223.036, -28.561 which is
RA(J2000) = 14h 52m 09s
Dec(J2000) = -28d 33' 39"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a single-peaked
structure with a duration of about 6 sec. The peak count rate
was ~700 counts/sec (15-350 keV), at ~1 sec after the trigger. There
may be additional emission at T+180 sec.
Due to an Sun observing constraint, Swift cannot slew to the BAT
position until 20:05 UT on 2010 December 26. There will thus be no XRT
or UVOT data for this trigger.
Burst Advocate for this burst is V. D'Elia (delia AT asdc.asi.it).
Please contact the BA by email if you require additional information
regarding Swift followup of this burst. In extremely urgent cases, after
trying the Burst Advocate, you can contact the Swift PI by phone (see
Swift TOO web site for information: http://www.swift.psu.edu/too.html.)
|
| GCN 11312 table |
|---|
| GRB_name |
GRB100928A |
| GCN_number |
11312 |
| Detection_method |
Swift-BAT Det |
| ra |
223.0370° |
| decl |
-28.5420° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 11312
SUBJECT: GRB 100928A, Swift-BAT refined analysis
DATE: 10/09/28 12:40:44 GMT
FROM: Hans Krimm at NASA-GSFC
H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC),
J. R. Cummings (GSFC/UMBC), V. D'Elia (ASDC), E. E. Fenimore (LANL),
N. Gehrels (GSFC), C. B. Markwardt (GSFC), D. M. Palmer (LANL),
T. Sakamoto (GSFC/UMBC),G. Sato (ISAS), M. Stamatikos (OSU),
J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+962 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 100928A (trigger #435160)
(D'Elia, et al., GCN Circ. 11310). The BAT ground-calculated position is
RA, Dec = 223.037, -28.542 deg which is
RA(J2000) = 14h 52m 09.0s
Dec(J2000) = -28d 32' 32.5"
with an uncertainty of 2.3 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 15%.
The mask-weighted light curve showed a single peak starting at T-1 with a total
duration of ~6 seconds. T90 (15-350 keV) is 3.3 +- 0.6 sec (estimated error
including systematics).
The time-averaged spectrum from T+0.9 to T+4.4 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.79 +- 0.29. The fluence in the 15-150 keV band is 3.5 +- 0.6 x 10-7 erg/cm2.
The 1-sec peak photon flux measured from T+1.31 sec in the 15-150 keV band
is 2.5 +- 0.5 ph/cm2/sec. 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/435160/BA/
|