| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
6:51:31 UTC |
GCN_circulars,INTEGRAL |
| ra |
255.5667° |
IPN |
| decl |
-23.3333° |
IPN |
| pos_error |
4.33e-02° |
IPN |
| GBM_located |
False |
|
| mjd |
54755.285775462966 |
GCN_circulars,INTEGRAL |
| IPN table |
|---|
| GRB_name |
GRB081016A |
| ra |
255.5667° |
| decl |
-23.3333° |
| pos_error |
4.33e-02° |
| GCN 8377 table |
|---|
| GRB_name |
GRB081016A |
| GCN_number |
8377 |
| Detection_method |
INTEGRAL |
| t_trigger |
6:51:31 UTC |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8377
SUBJECT: GRB 081016: A long GRB discovered by INTEGRAL
DATE: 08/10/16 08:18:04 GMT
FROM: Sandro Mereghetti at IASF/CNR
D.Gotz (CEA-Saclay), S.Mereghetti, A.Paizis (IASF-Milano), S. Soldi,
V.Beckmann, M. Beck, M. Tuerler (ISDC, Versoix), and J. Borkowski (CAMK,
Torun) on behalf of the IBAS Localization Team report:
A GRB lasting about 34 s has been detected by IBAS in IBIS/ISGRI data at
06:51:31 UT of October 16.
The coordinates (J2000) are:
RA = 255.5725 [degrees]
DEC= -23.3301 [degrees]
with an uncertainty of 1.5 arcmin (90% c.l.).
The burst is composed by two distinct peaks, and a preliminary spectral
analysis gives a peak flux in the 20-200 keV range of about 2.4
ph/cmsq/s (1-s integration time) and a fluence over the same energy range
of about 1.8x10e-6 erg/cmsq. Due to data gaps caused by telemetry
saturation these values should be considered as lower limits.
A plot of the light curve will be posted at
http://ibas.iasf-milano.inaf.it/IBAS_Results.html
This message can be cited.
|
| GCN 8379 table |
|---|
| GRB_name |
GRB081016A |
| GCN_number |
8379 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8379
SUBJECT: GRB 081016: Swift-XRT candidate afterglow detection
DATE: 08/10/16 17:19:15 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT Team
We have obtained 2 ks of XRT Photon Counting mode data of GRB 081016 (Gotz
et al. GCN Circ. 8377), beginning 20.4 ks after the INTEGRAL trigger. We
find an uncatalogued X-ray source at RA,Dec, 255.57032, -23.33556 which is
equvialent to:
RA (J2000): 17 02 16.88
Dec (J2000): -23:20:08.0
with an estimated uncertainty of 3.6" (radius, 90% confidence). This
position is 21" from the INTEGRAL position, within the INTEGRAL error
circle. It is not currently possible to determine whether this source is
fading. Further observations are planned.
This circular is an official product of the Swift-XRT team.
|
| GCN 8396 table |
|---|
| GRB_name |
GRB081016A |
| GCN_number |
8396 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 8396
SUBJECT: GRB 081016A: Swift-XRT refined analysis
DATE: 08/10/22 14:45:09 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans (U. Leicester) reports on behalf of the Swift-XRT team:
Swift-XRT reobserved the field of the INTEGRAL GRB 081016A (Gotz et al.
GCN Circ. 8377) 5.2 days after the trigger, obtaining 3.8 ks of data in
Photon Counting (PC) mode. The source seen in the earlier XRT
observation (Evans, GCN Circ. 8379) was no longer detected. A
three-sigma upper limit on the count rate is 4.7e-3 counts/sec,
significantly below the level of the previous detection (0.03
counts/sec). We therefore confirm that this was the afterglow of
GRB 081016A.
A spectrum formed from the first XRT observation, totalling 2 ks in PC
mode, can be modelled with an absorbed power law with photon index
2.60 (+0.94, -0.81). The absorption column is consistent with the
Galactic value of 1.7e21 cm^-2 (Kalberla et al 2005). The counts to
observed (unabsorbed) flux conversion factor is 1.1e-12 (3.0e-12) erg
cm^-2 ct^-1.
This circular is an official product of the Swift-XRT team.
|