| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB210803497 |
|
| T0 |
11:55:44.400 UTC |
GCN_circulars,Fermi GBM Det |
| ra |
218.6900° |
Fermi_GBM |
| decl |
-21.3800° |
Fermi_GBM |
| pos_error |
2.71e+00° |
Fermi_GBM |
| T90 |
9.216 s |
Fermi_GBM |
| T90_error |
0.528 s |
Fermi_GBM |
| T90_start |
11:55:44.595 UTC |
Fermi_GBM |
| fluence |
1.06e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
5.29e-08 erg/cm² |
Fermi_GBM |
| T100 |
9.411 s |
|
| GBM_located |
True |
|
| mjd |
59429.49704166667 |
GCN_circulars,Fermi GBM Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB210803497 |
| trigger_name |
bn210803497 |
| ra |
218.6900° |
| decl |
-21.3800° |
| pos_error |
2.71e+00° |
| datum |
2021-08-03 |
| t_trigger |
11:55:44.403 UTC |
| T90 |
9.216 s |
| T90_error |
0.528 s |
| T90_start |
11:55:44.595 UTC |
| fluence |
1.06e-05 erg/cm² |
| fluence_error |
5.29e-08 erg/cm² |
| flux_1024 |
3.57e+01 erg/cm²/s |
| flux_1024_error |
6.02e-01 erg/cm²/s |
| flux_1024_time |
3.84e-01 erg/cm²/s |
| flux_64 |
4.04e+01 erg/cm²/s |
| flux_64_error |
2.48e+00 erg/cm²/s |
| GCN 30588 table |
|---|
| GRB_name |
GRB210803A |
| GCN_number |
30588 |
| Detection_method |
Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 30588
SUBJECT: GRB 210803A: BALROG localization (Fermi Trigger 649684549 / GRB 210803497)
DATE: 21/08/03 12:21:12 GMT
FROM: Jochen Greiner at MPE,Garching
B. Biltzinger, F. Kunzweiler, F. Berlato, J. Burgess & J. Greiner (all MPE Garching) report:
The public trigdat data of the Fermi Gamma-ray Burst Monitor (GBM) trigger
649684549 at 11:55:44 on 03 Aug. 2021 were automatically fitted for spectrum
and sky location with BALROG (Burgess et al. 2018, MNRAS 476, 1427;
Berlato et al. 2019, ApJ 873, 60).
The best-fit position (1 sigma statistical errors) is:
RA(2000.0) = 202.4+/-0.4 deg
Decl.(2000.0) = -33.9+/-0.7 deg
We estimate an additional systematic error of 2 deg.
Further details are available at:
https://grb.mpe.mpg.de/grb/GRB210803497/
The Healpix map can be downloaded from:
https://grb.mpe.mpg.de/grb/GRB210803497/healpix
The location parameters are available as JSON at:
https://grb.mpe.mpg.de/grb/GRB210803497/json
|
| GCN 30595 table |
|---|
| GRB_name |
GRB210803A |
| GCN_number |
30595 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
11:55:44.400 UTC |
| ra |
218.7000° |
| decl |
-21.4000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 30595
SUBJECT: GRB 210803A: Fermi GBM observation
DATE: 21/08/04 09:07:17 GMT
FROM: Elisabetta Bissaldi at INFN,Bari
E. Bissaldi (Politecnico and INFN Bari) and C. Meegan (UAH)
report on behalf of the Fermi GBM Team:
"At 11:55:44.40 UT on 3 August 2021, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 210803A (trigger 649684549 / 210803497).
The on-ground calculated location, using the GBM trigger data, is
RA = 218.7, DEC = -21.4
(J2000 degrees, equivalent to 14h 34m, -21d 24'),
with a statistical uncertainty of 1 degree (radius, 1-sigma containment,
statistical only; there is additionally a systematic
error which we have characterized as a core-plus-tail model, with 90% of
GRBs having a 3.7 deg error and a small tail suffering a larger than 10 deg
systematic error. [Connaughton et al. 2015, ApJS, 216, 32] ).
The angle from the Fermi LAT boresight
at the GBM trigger time is 98 degrees.
The GBM light curve consists of bright, FRED-like emission episode
with a duration (T90) of about 9 s (50-300 keV).
The time-averaged spectrum from T0 to T0+9 s is
well fit by a Band function with Epeak = 164 +/- 19 keV,
alpha = -1.20 +/- 0.05, and beta = -2.06 +/- 0.07.
The event fluence (10-1000 keV) in this time interval is
(1.28 +/- 0.03)E-05 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+0.4 s in the 10-1000 keV band
is 35.7 +/- 0.6 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog:
https://heasarc.gsfc.nasa.gov/W3Browse/fermi/fermigbrst.html
For Fermi GBM data and info, please visit the official Fermi GBM Support Page:
https://fermi.gsfc.nasa.gov/ssc/data/access/gbm/"
|