| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
8:27:13 UTC |
GCN_circulars,Swift Det |
| ra |
2.8130° |
Swift |
| decl |
-33.0240° |
Swift |
| pos_error |
2.02e-02° |
Swift |
| T90 |
168.3 s |
Swift |
| T90_start |
8:27:13 UTC |
Swift |
| fluence |
2.70e-06 erg/cm² |
Swift |
| T100 |
168.3 s |
|
| GBM_located |
False |
|
| mjd |
59307.35223379629 |
GCN_circulars,Swift Det |
| IPN table |
|---|
| GRB_name |
GRB210403A |
| ra |
2.7667° |
| decl |
-33.0000° |
| pos_error |
5.00e-02° |
| Swift table |
|---|
| GRB_name |
GRB210403A |
| t_trigger |
8:27:13 UTC |
| ra |
2.8130° |
| decl |
-33.0240° |
| pos_error |
2.02e-02° |
| T90 |
168.3 s |
| fluence |
2.70e-06 erg/cm² |
| GCN 29748 table |
|---|
| GRB_name |
GRB210403A |
| GCN_number |
29748 |
| Detection_method |
Swift Det |
| t_trigger |
8:27:13 UTC |
| ra |
2.7670° |
| decl |
-32.9990° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 29748
SUBJECT: GRB 210403A: Swift detection of a burst
DATE: 21/04/03 08:40:22 GMT
FROM: Kim Page at U.of Leicester
K. L. Page (U Leicester) and A. Y. Lien (GSFC/UMBC) report on behalf
of the Neil Gehrels Swift Observatory Team:
At 08:27:13 UT, the Swift Burst Alert Telescope (BAT) triggered and
located GRB 210403A (trigger=1040345). Swift did not slew immediately
to the burst due to an observing constraint.
The BAT on-board calculated location is
RA, Dec 2.767, -32.999 which is
RA(J2000) = 00h 11m 04s
Dec(J2000) = -32d 59' 56"
with an uncertainty of 3 arcmin (radius, 90% containment, including
systematic uncertainty). The BAT light curve showed a multi-peaked
structure with a duration of about 140 sec. The peak count rate
was ~1200 counts/sec (15-350 keV), at ~0 sec after the trigger.
Due to a Sun observing constraint, Swift cannot slew to the BAT
position until 21:34 UT on 2021 April 14. There will thus be no XRT or
UVOT data for this trigger before this time.
Burst Advocate for this burst is K. L. Page (klp5 AT leicester.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/)
|
| GCN 29754 table |
|---|
| GRB_name |
GRB210403A |
| GCN_number |
29754 |
| Detection_method |
Swift-BAT Det |
| ra |
2.8130° |
| decl |
-33.0240° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 29754
SUBJECT: GRB 210403A: Swift-BAT refined analysis
DATE: 21/04/03 20:57:12 GMT
FROM: Scott Barthelmy at NASA/GSFC
H. A. Krimm (NSF), S. D. Barthelmy (GSFC), J. R. Cummings (CPI),
S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC),
K. L. Page (U Leicester), D. M. Palmer (LANL), T. Sakamoto (AGU),
M. Stamatikos (OSU), T. N. Ukwatta (LANL), (i.e. the Swift-BAT team):
Using the data set from T-61 to T+242 sec from the recent telemetry downlink,
we report further analysis of BAT GRB 210403A (trigger #1040345)
(K.Page, et al., GCN Circ. 29748). The BAT ground-calculated position is
RA, Dec = 2.813, -33.024 deg which is
RA(J2000) = 00h 11m 15.2s
Dec(J2000) = -33d 01' 27.2"
with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment).
The partial coding was 80%.
The lightcurve has multiple peaks starting at T-40 sec and ending at T+140 sec.
T90 (15-350 keV) is 168.3 +- 9.2 sec (estimated error including systematics).
The time-averaged spectrum from T-41.51 to T+137.18 sec is best fit by a power law
with an exponential cutoff. This fit gives a photon index 0.93 +- 0.52,
and Epeak of 37.4 +- 4.8 keV (chi squared 52.21 for 56 d.o.f.). For this
model the total fluence in the 15-150 keV band is 2.7 +- 0.2 x 10^-06 erg/cm2
and the 1-sec peak flux measured from T+0.18 sec in the 15-150 keV band is
1.1 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index
of 2.13 +- 0.10 (chi squared 73.02 for 57 d.o.f.). 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/1040345/BA/
|