| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB150416773 |
|
| T0 |
18:33:25.965 UTC |
Fermi_GBM |
| ra |
58.8000° |
Fermi_LAT |
| decl |
53.0000° |
Fermi_LAT |
| pos_error |
1.90e+00° |
Fermi_LAT |
| T90 |
33.281 s |
Fermi_GBM |
| T90_error |
3.665 s |
Fermi_GBM |
| T90_start |
18:33:26.477 UTC |
Fermi_GBM |
| fluence |
6.24e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
5.90e-08 erg/cm² |
Fermi_GBM |
| T100 |
33.793 s |
|
| GBM_located |
False |
|
| mjd |
57128.7732171875 |
Fermi_GBM |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB150416773 |
| trigger_name |
bn150416773 |
| ra |
58.7500° |
| decl |
52.9600° |
| pos_error |
3.11e+00° |
| datum |
2015-04-16 |
| t_trigger |
18:33:25.965 UTC |
| T90 |
33.281 s |
| T90_error |
3.665 s |
| T90_start |
18:33:26.477 UTC |
| fluence |
6.24e-06 erg/cm² |
| fluence_error |
5.90e-08 erg/cm² |
| flux_1024 |
3.80e+00 erg/cm²/s |
| flux_1024_error |
2.11e-01 erg/cm²/s |
| flux_1024_time |
1.28e+01 erg/cm²/s |
| flux_64 |
5.45e+00 erg/cm²/s |
| flux_64_error |
9.84e-01 erg/cm²/s |
| Fermi LAT table |
|---|
| GRB_name_Fermi |
GRB150416773 |
| GRB_name |
GRB150416A |
| MET |
450902008.97 |
| datum |
2015-04-16 |
| t_trigger |
18:33:25.970 UTC |
| ra |
58.8000° |
| decl |
53.0000° |
| pos_error |
1.90e+00° |
| GCN 17711 table |
|---|
| GRB_name |
GRB150416A |
| GCN_number |
17711 |
| Detection_method |
Fermi LAT Det |
| t_trigger |
18:33:32 UTC |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17711
SUBJECT: GRB 150416A: Fermi-LAT detection
DATE: 15/04/17 04:28:57 GMT
FROM: Daniel Kocevski at GSFC
D. Kocevski (NASA/Goddard) and E. Bissaldi (INFN Bari) report on behalf of the Fermi-LAT team:
At 18:33:32 UT on April 15th, 2015, Fermi-LAT detected emission from GRB 150416A, which was also detected by Fermi-GBM (trigger 450902008/150416773).
The GBM location was initially outside the LAT field of view at an angle of ~68 degrees to the LAT boresight. Therefore, no observations of events > 100 MeV are available during the emission observed by the GBM.
Using the LAT Low Energy (LLE) data selection, over 25 counts above background were detected within a 50 s interval coinciding with the time of the GBM emission. This data selection has insufficient spatial resolution to provide a reliable LAT localization.
The Fermi-LAT point of contact for this burst is Elisabetta Bissaldi (elisabetta.bissaldi@ba.infn.it).
The Fermi-LAT is a pair conversion telescope designed to cover the energy band from 20 MeV to greater than 300 GeV. It is the product of an international collaboration between NASA and DOE in the U.S. and many scientific institutions across France, Italy, Japan and Sweden.
|
| GCN 17717 table |
|---|
| GRB_name |
GRB150416A |
| GCN_number |
17717 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
18:33:25.970 UTC |
| ra |
58.8000° |
| decl |
53.0000° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 17717
SUBJECT: GRB 150416A: Fermi GBM detection
DATE: 15/04/17 18:32:07 GMT
FROM: Peter Jenke at MSFC
P. Jenke (UAH) reports on behalf of the Fermi GBM Team:
"At 18:33:25.97 on April 16 2015, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 150416A (trigger 450902008/150416773) which
was also detected by Fermi-LAT (D. Kocevski et al., GCN 17711)
The GBM on-ground location, using the Fermi GBM trigger
data, is RA = 58.8, Dec = 53.0 (J2000 degrees, equivalent to
3h 55m 00s, 53d 0), with an uncertainty of 1.9
degrees (radius, 1-sigma containment,statistical
only; there is additionally a systematic error which is
currently estimated to be 2 to 3 degrees).
The angle of the burst direction to the Fermi LAT boresight is
68 degrees.
The GBM light curve consists of two peaks with a duration
(T90) of about 33 s (50-300 keV).
The time-averaged spectrum from T0+0s to T0+34.8s
is well fit by a BAND function with Epeak = 940 +/- 160 keV,
Alpha = -0.9 +/- 0.05 and Beta = -2.1 +/- 0.2.
The event fluence (10-1000 keV) in this time interval is
(1.4 +/- 0.04)E-05 erg/cm^2. The 1.0-sec peak photon flux measured
starting from T0+12.8 s in the 10-1000 keV band
is 3.8 +/- 0.2 ph/s/cm^2.
The spectral analysis results presented above are preliminary;
final results will be published in the GBM GRB Catalog."
|