| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
15:46:45 UTC |
GCN_circulars,Swift Det |
| ra |
179.2740° |
Swift |
| decl |
-29.1780° |
Swift |
| pos_error |
1.86e-02° |
Swift |
| T90 |
13.3 s |
Swift |
| T90_start |
15:46:45 UTC |
Swift |
| fluence |
4.00e-07 erg/cm² |
Swift |
| T100 |
13.3 s |
|
| GBM_located |
False |
|
| mjd |
57627.65746527778 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB160827A |
| ra |
179.2958° |
| decl |
-29.1667° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB160827A |
| t_trigger |
15:46:45 UTC |
| ra |
179.2740° |
| decl |
-29.1780° |
| pos_error |
1.86e-02° |
| T90 |
13.3 s |
| fluence |
4.00e-07 erg/cm² |
| GCN 19876 table |
|---|
| GRB_name |
GRB160827A |
| GCN_number |
19876 |
| Detection_method |
Swift Det |
| t_trigger |
15:46:45 UTC |
| ra |
179.2960° |
| decl |
-29.1590° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 19876
SUBJECT: GRB 160827A: Swift detection of a burst
DATE: 16/08/27 15:54:29 GMT
FROM: Scott Barthelmy at NASA/GSFC
K. L. Page (U Leicester) and S. D. Barthelmy (GSFC) report on behalf
of the Swift Team:
At 15:46:45 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 160827A (trigger=710050). Swift did not slew due to observing
constraint. The BAT on-board calculated location is
RA, Dec 179.296, -29.159, which is
RA(J2000) = 11h 57m 11s
Dec(J2000) = -29d 09' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows multiple overlapping peaks
with a duration of about 30 sec. The peak count rate
was ~1000 counts/sec (15-350 keV), at ~8 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 00:09 UT on 2016 November 14. There will thus be no XRT
or UVOT data for this trigger before this time.
Burst Advocate for this burst is K. L. Page (klp5 AT leicester.ac.uk).
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 19878 table |
|---|
| GRB_name |
GRB160827A |
| GCN_number |
19878 |
| Detection_method |
Swift-BAT Det |
| ra |
179.2740° |
| decl |
-29.1780° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 19878
SUBJECT: GRB 160827A: Swift-BAT refined analysis
DATE: 16/08/27 22:23:49 GMT
FROM: Scott Barthelmy at NASA/GSFC
T. N. Ukwatta (LANL) S. D. Barthelmy (GSFC), J. R. Cummings (GSFC/UMBC),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (GSFC/UMBC),
C. B. Markwardt (GSFC), K. L. Page (U Leicester), D. M. Palmer (LANL),
T. Sakamoto (AGU), M. Stamatikos (OSU),
(i.e. the Swift-BAT team):
Using the data set from T-60 to T+243 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 160827A (trigger #710050)
(Page, et al., GCN Circ. 19876). The BAT ground-calculated position is
RA, Dec = 179.274, -29.178 deg, which is
RA(J2000) = 11h 57m 05.8s
Dec(J2000) = -29d 10' 40.9"
with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 48%.
The mask-weighted light curve shows a few olverlapping peaks starting
at ~T-5 sec, peaking at ~T+3 sec, and ending at ~T+13 sec.
T90 (15-350 keV) is 13.3 +- 2.2 sec (estimated error including systematics).
The time-averaged spectrum from T-5.81 to T+8.78 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.95 +- 0.25. The fluence in the 15-150 keV band is 4.0 +- 0.7 x 10^-7 erg/cm2.
The 1-sec peak photon flux measured from T+2.49 sec in the 15-150 keV band
is 0.7 +- 0.2 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/710050/BA/
|