| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB221115018 |
|
| T0 |
0:25:28.288 UTC |
Fermi_GBM |
| ra |
37.7200° |
Fermi_GBM |
| decl |
-3.0900° |
Fermi_GBM |
| pos_error |
4.57e+00° |
Fermi_GBM |
| T90 |
147.459 s |
Fermi_GBM |
| T90_error |
1.28 s |
Fermi_GBM |
| T90_start |
0:25:28.288 UTC |
Fermi_GBM |
| fluence |
1.28e-05 erg/cm² |
Fermi_GBM |
| fluence_error |
6.42e-08 erg/cm² |
Fermi_GBM |
| T100 |
147.459 s |
|
| GBM_located |
True |
|
| mjd |
59898.01768851852 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB221115018 |
| trigger_name |
bn221115018 |
| ra |
37.7200° |
| decl |
-3.0900° |
| pos_error |
4.57e+00° |
| datum |
2022-11-15 |
| t_trigger |
0:25:28.800 UTC |
| T90 |
147.459 s |
| T90_error |
1.28 s |
| T90_start |
0:25:28.288 UTC |
| fluence |
1.28e-05 erg/cm² |
| fluence_error |
6.42e-08 erg/cm² |
| flux_1024 |
3.50e+00 erg/cm²/s |
| flux_1024_error |
2.44e-01 erg/cm²/s |
| flux_1024_time |
3.21e+01 erg/cm²/s |
| flux_64 |
5.21e+00 erg/cm²/s |
| flux_64_error |
1.03e+00 erg/cm²/s |
| GCN 32940 table |
|---|
| GRB_name |
GRB221115A |
| GCN_number |
32940 |
| Detection_method |
Swift Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32940
SUBJECT: GRB 221115A: Swift/BAT-GUANO detection
DATE: 22/11/15 22:49:14 GMT
FROM: Aaron Tohuvavohu at U Toronto
Aaron Tohuvavohu (U Toronto), Gayathri Raman (PSU), James DeLaunay
(UAlabama), Jamie A. Kennea (PSU), Tyler Parsotan (GSFC/UMBC) report:
Swift/BAT did not localize GRB 221115A onboard (T0: 2022-11-15T00:25:28
UTC, Fermi/GBM trig 690164733).
The Fermi notice, distributed in near real-time, triggered the Swift
Mission Operations Center operated Gamma-ray Urgent Archiver for Novel
Opportunities (GUANO; Tohuvavohu et al. 2020, ApJ, 900, 1).
Upon trigger, GUANO sent a command to the Swift Burst Alert Telescope
(BAT) to save 200 seconds of BAT event-mode data from [-50,+150]
seconds around the time of the burst. All the requested event mode
data was delivered to the ground.
The BAT likelihood search, NITRATES (DeLaunay + Tohuvavohu,
arXiv:2111.01769), detects the burst with a sqrt(TS) of 8.4 in a
16.384 s analysis time bin.
NITRATES results, independently, are ambiguous with respect to whether
this burst originates from in or outside the BAT FoV.
The Fermi/GBM localization places this burst outside the
contemporaneous BAT FoV.
See Section 9.1 and Figure 17 in the NITRATES paper for brief
descriptions and interpretation of sqrt(TS), DeltaLLHPeak, and
DeltaLLHOut.
GUANO is a fully autonomous, extremely low latency, spacecraft
commanding pipeline designed for targeted recovery of BAT event mode
data around the times of compelling astrophysical events to enable
more sensitive GRB searches.
A live reporting of Swift/BAT event data recovered by GUANO can be
found at: https://www.swift.psu.edu/guano/
|
| GCN 32942 table |
|---|
| GRB_name |
GRB221115A |
| GCN_number |
32942 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
0:25:28.800 UTC |
| ra |
37.7000° |
| decl |
-3.1000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 32942
SUBJECT: GRB 221115A: Fermi GBM detection
DATE: 22/11/16 15:43:45 GMT
FROM: Peter Veres at UAH
P. Veres and C. Meegan (both UAH)
report on behalf of the Fermi GBM Team:
"At 00:25:28.80 UT on 15 November 2022, the Fermi Gamma-Ray Burst Monitor (GBM)
triggered and located GRB 221115A (trigger 690164733 / 221115018)
which was also detected by the Swift/BAT-GUANO (Tohuvavohu et al. GCN 32940).
The on-ground calculated location, using the GBM trigger data, is RA =
37.7, DEC = -3.1 (J2000 degrees, equivalent to 02 h 31 m, -03 d 06 '),
with a statistical uncertainty of 2.1 degrees (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 84 degrees.
The GBM light curve consists of two emission episodes with a duration
(T90) of about 147 s (50-300 keV). The time-averaged spectrum from
T0-12.5 s to T0+151.3 s is best fit by
a power law function with an exponential high-energy cutoff. The
power law index is -0.83 +/- 0.08 and the cutoff energy, parameterized
as Epeak, is 283 +/- 30 keV.
The event fluence (10-1000 keV) in this time interval is (2.26 +/-
0.12)E-5 erg/cm^2. The 1-sec peak photon flux measured starting from
T0+32.1 s in the 10-1000 keV band is 3.50 +/- 0.24 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/"
|