| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
5:03:25 UTC |
GCN_circulars,Swift Det |
| ra |
289.2500° |
Swift |
| decl |
-17.1200° |
Swift |
| pos_error |
1.63e-02° |
Swift |
| T90 |
66.0 s |
Swift |
| T90_start |
5:03:25 UTC |
Swift |
| fluence |
8.60e-07 erg/cm² |
Swift |
| T100 |
66.0 s |
|
| GBM_located |
False |
|
| mjd |
55456.210706018515 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB100917A |
| ra |
289.2667° |
| decl |
-17.1000° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB100917A |
| t_trigger |
5:03:25 UTC |
| ra |
289.2500° |
| decl |
-17.1200° |
| pos_error |
1.63e-02° |
| T90 |
66.0 s |
| fluence |
8.60e-07 erg/cm² |
| GCN 11288 table |
|---|
| GRB_name |
GRB100917A |
| GCN_number |
11288 |
| Detection_method |
Swift Det |
| t_trigger |
5:03:25 UTC |
| ra |
289.2650° |
| decl |
-17.1040° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 11288
SUBJECT: GRB 100917A: Swift detection of a burst
DATE: 10/09/17 05:23:07 GMT
FROM: Owen Littlejohns at U of Leicester
O. M. Littlejohns (U Leicester), A. P. Beardmore (U Leicester),
P. A. Evans (U Leicester), J. M. Gelbord (PSU), E. A. Hoversten (PSU),
C. B. Markwardt (NASA/GSFC), C. Pagani (U Leicester),
K. L. Page (U Leicester), A. Rowlinson (U Leicester),
M. H. Siegel (PSU) and C. A. Swenson (PSU) report on behalf of the
Swift Team:
At 05:03:25 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 100917A (trigger=434360). Swift did not slew to the burst
location due to a moon observing constraint. The BAT on-board calculated
location is RA, Dec 289.265, -17.104 which is
RA(J2000) = 19h 17m 04s
Dec(J2000) = -17d 06' 15"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a weak peak
with a duration of about 4 sec. The peak count rate
was ~400 counts/sec (15-350 keV), at ~1 sec after the trigger.
Due to an observing constraint, Swift cannot slew to the BAT position.
There will thus be no XRT or UVOT data for this trigger.
This trigger will be in moon constraint until approximately 06:30 UT
on the 19th of September.
Burst Advocate for this burst is O. M. Littlejohns (oml2 AT star.le.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 11289 table |
|---|
| GRB_name |
GRB100917A |
| GCN_number |
11289 |
| Detection_method |
Swift-BAT Det |
| ra |
289.2500° |
| decl |
-17.1200° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 11289
SUBJECT: GRB 100917A: Swift-BAT refined analysis
DATE: 10/09/17 18:46:15 GMT
FROM: Craig Markwardt at NASA/GSFC/UMD
J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC),
W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL),
N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA),
O. M. Littlejohns (U Leicester), C. B. Markwardt (GSFC/UMD),
D. M. Palmer (LANL), A. M. Parsons (GSFC), 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+960 sec from the recent telemetry
downlink, we report further analysis of BAT GRB 100917A (trigger
#434360) (Littlejohns, et al., GCN Circ. 11288). The BAT ground-
calculated position is RA, Dec = 289.250, -17.120 deg which is
RA(J2000) = 19h 17m 00.1s
Dec(J2000) = -17d 07' 12.1"
with an uncertainty of 2.1 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 62%.
The mask-weighted light curve shows a FRED-like profile with rise time
of ~5 sec and decay time of ~30 sec. T90 (15-350 keV) is 66 +- 22 sec
(estimated error including systematics).
The time-averaged spectrum from T-2.1 to T+76 sec is best fit by a
simple power-law model. The power law index of the time-averaged
spectrum is 1.67 +- 0.23. The fluence in the 15-150 keV band is 8.6 +-
1.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+3.22
sec in the 15-150 keV band is 0.6 +- 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/434360/BA/
|
| GCN 11293 table |
|---|
| GRB_name |
GRB100917A |
| GCN_number |
11293 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 11293
SUBJECT: GRB 100917A: TAROT La Silla observatory optical observations
DATE: 10/09/19 08:51:19 GMT
FROM: Alain Klotz at CESR-CNRS
Klotz A. (CESR-OMP), Gendre B. (IASF),
Boer M. (OHP-OAMP), Atteia J.L. (LATT-OMP) report:
We imaged the field of GRB 100917A detected by SWIFT
(trigger 434360) with the TAROT robotic telescope (D=25cm)
located at the European Southern Observatory,
La Silla observatory, Chile.
The observations started 261s after the GRB trigger
(15s after the notice). The elevation of the field decreased from
22 degrees above horizon and weather conditions
were fair.
We co-added a series of exposures.
We do not detect any OT in the BAT refined position provided
by Cummings et al. 2010 (GCNC 11289) with a limiting
magnitude of:
t0+261s to t0+531s : R > 14.1
Magnitudes were estimated with the nearby USNO-B1 stars
and are not corrected for galactic dust extinction.
N.B. Galactic coordinates are lon= 20.2843 lat=-13.2388
and the galactic extinction in R band is 0.3 magnitudes
estimated from D. Schlegel et al. 1998ApJ...500..525S.
This message may be cited.
|