| Summary table |
|---|
| Variable |
Value |
Source |
| GRB_name_Fermi |
GRB170419898 |
|
| T0 |
21:33:46 UTC |
GCN_circulars,Swift Det |
| ra |
60.4940° |
Swift |
| decl |
-15.1210° |
Swift |
| pos_error |
1.09e-02° |
Swift |
| T90 |
24.064 s |
Fermi_GBM |
| T90_error |
0.572 s |
Fermi_GBM |
| T90_start |
21:33:46.807 UTC |
Fermi_GBM |
| fluence |
2.25e-06 erg/cm² |
Fermi_GBM |
| fluence_error |
1.89e-08 erg/cm² |
Fermi_GBM |
| T100 |
77.2 s |
|
| GBM_located |
False |
|
| mjd |
57862.89844907408 |
GCN_circulars,Swift Det |
| Fermi GBM table |
|---|
| GRB_name_Fermi |
GRB170419898 |
| trigger_name |
bn170419898 |
| ra |
60.4979° |
| decl |
-15.1431° |
| pos_error |
3.91e+00° |
| datum |
2017-04-19 |
| t_trigger |
21:33:46.807 UTC |
| T90 |
24.064 s |
| T90_error |
0.572 s |
| T90_start |
21:33:46.807 UTC |
| fluence |
2.25e-06 erg/cm² |
| fluence_error |
1.89e-08 erg/cm² |
| flux_1024 |
3.79e+00 erg/cm²/s |
| flux_1024_error |
2.15e-01 erg/cm²/s |
| flux_1024_time |
1.22e+00 erg/cm²/s |
| flux_64 |
4.71e+00 erg/cm²/s |
| flux_64_error |
1.00e+00 erg/cm²/s |
| IPN table |
|---|
| GRB_name |
GRB170419B |
| ra |
60.4958° |
| decl |
-15.1000° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB170419B |
| t_trigger |
21:33:46 UTC |
| ra |
60.4940° |
| decl |
-15.1210° |
| pos_error |
1.09e-02° |
| T90 |
77.2 s |
| fluence |
1.90e-06 erg/cm² |
| GCN 21016 table |
|---|
| GRB_name |
GRB170419B |
| GCN_number |
21016 |
| Detection_method |
Swift Det |
| t_trigger |
21:33:46 UTC |
| ra |
60.4980° |
| decl |
-15.1430° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21016
SUBJECT: GRB 170419B: Swift detection of a burst
DATE: 17/04/19 21:59:49 GMT
FROM: Scott Barthelmy at NASA/GSFC
A. Cholden-Brown (PSU), S. D. Barthelmy (GSFC), C. Gronwall (PSU),
N. P. M. Kuin (UCL-MSSL), D. M. Palmer (LANL) and M. H. Siegel (PSU)
report on behalf of the Swift Team:
At 21:33:46 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 170419B (trigger=748947). Swift did not slew due to Sun constraint.
The BAT on-board calculated location is
RA, Dec 60.498, -15.143, which is
RA(J2000) = 04h 01m 59s
Dec(J2000) = -15d 08' 32"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve shows a single
with a duration of about 10 sec. The peak count rate
was ~3000 counts/sec (15-350 keV), at ~3 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 05:29 UT on 2017 June 19. There will thus be no XRT or
UVOT data for this trigger before this time.
Burst Advocate for this burst is A. Cholden-Brown (aaronb AT swift.psu.edu).
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 21019 table |
|---|
| GRB_name |
GRB170419B |
| GCN_number |
21019 |
| Detection_method |
Fermi GBM Det |
| t_trigger |
21:33:46.807 UTC |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21019
SUBJECT: GRB 170419B: Fermi GBM observation
DATE: 17/04/20 09:08:01 GMT
FROM: Andreas von Kienlin at MPE
P. Veres and C. Meegan (both UAH)
report on behalf of the Fermi GBM Team:
"At 21:33:46.807 UT on 19 April 2016, the Fermi Gamma-Ray Burst Monitor
triggered and located GRB 170419B (trigger 514330431 / 170419898).
which was also detected by the Swift/BAT
(Cholden-Brown et al., GCN 21016). The GBM on-ground
location is consistent with the Swift position.
The angle from the Fermi LAT boresight at the GBM trigger time is 41 degrees.
The GBM light curve shows a single pulse
with a duration (T90) of about 24 s (50-300 keV).
The time-averaged spectrum from T0-0.5 s to T0+5.1 s is
best fit by a Band function with Epeak = 116 +/- 19 keV,
alpha = -0.03 +/- 0.29, and beta = -2.07 +/- 0.15.
The event fluence (10-1000 keV) in this time interval is
(2.4 +/- 0.2)E-6 erg/cm^2. The 1-sec peak photon flux measured
starting from T0+1.2 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."
|
| GCN 21024 table |
|---|
| GRB_name |
GRB170419B |
| GCN_number |
21024 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21024
SUBJECT: GRB 170419B: Zadko observatory - Gingin optical observations
DATE: 17/04/20 14:19:03 GMT
FROM: Alain Klotz at IRAP-CNRS-OMP
A. Klotz, D. Turpin (IRAP-CNRS-OMP), D. Macpherson (UWA/ICRAR), D.
Coward (UWA),
M. Boer, (UNS-CNRS-OCA), Gendre B. (UVI - Etelman Obs.),
A. Williams (PO-UWA), R. Martin (PO-UWA)
report:
We imaged the field of GRB 170419B detected by SWIFT
(trigger 748947) with the Zadko robotic telescope (D=100cm)
located at the observatory - Gingin, Australia.
The observations started 13.3h after the GRB trigger.
The elevation of the field decreased from
31 degrees above horizon and weather conditions
were good.
We co-added a series of exposures but we did not find any
optical transcient in the BAT error box provided by
Cholden-Brown et al. (GCNC 21016):
t0+13.3h to t0+13.5h : Rlim = 19.2
Magnitudes were estimated with the nearby NOMAD1 stars
and are not corrected for galactic dust extinction.
|
| GCN 21025 table |
|---|
| GRB_name |
GRB170419B |
| GCN_number |
21025 |
| Detection_method |
Swift-BAT Det |
| ra |
60.4940° |
| decl |
-15.1210° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21025
SUBJECT: GRB 170419B, Swift-BAT refined analysis
DATE: 17/04/20 17:02:25 GMT
FROM: Amy Lien at GSFC
T. N. Ukwatta (LANL), S. D. Barthelmy (GSFC),
A. Cholden-Brown (PSU), J. R. Cummings (CPI),
N. Gehrels (GSFC), H. A. Krimm (NSF/USRA),
A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU) (i.e. the Swift-BAT team):
Using the data set from T-240 to T+262 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 170419B (trigger #748947)
(Cholden-Brown et al., GCN Circ. 21016). The BAT ground-calculated position is
RA, Dec = 60.494, -15.121 deg which is
RA(J2000) = 04h 01m 58.5s
Dec(J2000) = -15d 07' 14.3"
with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 52%.
The mask-weighted light curve shows a single-pulse structure that starts at
~ T0 and peaks at ~T+2. The major part of the pulse ends at ~T+10 s, and
the weaker tail emission lasts till ~T+90 s. T90 (15-350 keV) is
77.2 +- 9.8 sec (estimated error including systematics).
The time-averaged spectrum from T+0.3 to T+88.0 sec is best fit by a simple
power-law model. The power law index of the time-averaged spectrum is
1.47 +- 0.13. The fluence in the 15-150 keV band is 1.9 +- 0.2 x 10^-6 erg/cm2.
The 1-sec peak photon flux measured from T+1.98 sec in the 15-150 keV band
is 2.4 +- 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/748947/BA/
|