| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
0:09:20 UTC |
GCN_circulars,INTEGRAL |
| ra |
245.3000° |
IPN |
| decl |
-60.8833° |
IPN |
| pos_error |
5.00e-02° |
IPN |
| GBM_located |
False |
|
| mjd |
57964.00648148148 |
GCN_circulars,INTEGRAL |
| IPN table |
|---|
| GRB_name |
GRB170730A |
| ra |
245.3000° |
| decl |
-60.8833° |
| pos_error |
5.00e-02° |
| GCN 21390 table |
|---|
| GRB_name |
GRB170730A |
| GCN_number |
21390 |
| Detection_method |
IBAS |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21390
SUBJECT: IBAS weak Alert nr.7881: possible GRB 170730A
DATE: 17/07/30 07:45:59 GMT
FROM: Diego Gotz at CEA
D.Gotz (CEA Saclay) on behalf of the IBAS Localization Team reports:
the weak IBAS Alert nr. 7881 corresponds to a weak transient source lasting about 100 s, starting at 00:09:32 UT on July 30th 2017, localized at
R.A: 245.3407 deg
Dec: -60.8832 deg
with an unceratinty of 2.5 arc min (90% c.l.).
We prliminarly classify it as a GRB, but we cannot exclude that it is a new Galactic source due to its low Galactic latitude.
Futher analysis is on-going.
This message can be cited.
|
| GCN 21392 table |
|---|
| GRB_name |
GRB170730A |
| GCN_number |
21392 |
| Detection_method |
INTEGRAL |
| t_trigger |
0:09:20 UTC |
| ra |
245.2996° |
| decl |
-60.8866° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 21392
SUBJECT: GRB170730A detecetd by INTEGRAL. Refined analysis
DATE: 17/07/30 14:19:45 GMT
FROM: Sandro Mereghetti at IASF-Milano/INAF
S.Mereghetti (IASF-Milano), D.Gotz (CEA, Saclay), C.Ferrigno, E.Bozzo, and
J.Borkowski (CAMK, Torun) on behalf of the IBAS Localization Team report:
further analysis of the possible GRB 170730A detected as a subtrheshold
alert by IBAS in the IBIS/ISGRI data at 00:09:20 UT of July 30, 2017 (Gotz
et al. GCN 21390) yields the refined coordinates (J2000):
R.A.= 245.2996 deg
DEC.= -60.8866 deg
with an uncertainty of 2 arcmin (90% c.l.).
The burst lasted about 500 s, with a peak flux of about 0.6 photons/cm2/s
(20-200 keV, 1-s integration time) and a fluence in the same energy range
of about 1e-6 erg/cmq. The time averaged spectrum is consistent with a
power law with photon index ~2
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
|