| Summary table |
|---|
| Variable |
Value |
Source |
| T0 |
1:21:33 UTC |
GCN_circulars,INTEGRAL |
| ra |
64.7458° |
IPN |
| decl |
60.6000° |
IPN |
| pos_error |
5.33e-02° |
IPN |
| GBM_located |
False |
|
| mjd |
55057.05663194445 |
GCN_circulars,INTEGRAL |
| IPN table |
|---|
| GRB_name |
GRB090814B |
| ra |
64.7458° |
| decl |
60.6000° |
| pos_error |
5.33e-02° |
| GCN 9795 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9795 |
| Detection_method |
INTEGRAL |
| t_trigger |
1:21:33 UTC |
| ra |
64.7488° |
| decl |
60.5796° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9795
SUBJECT: GRB 090814B: a long GRB localized by INTEGRAL
DATE: 09/08/14 03:07:20 GMT
FROM: Volker Beckmann at ISDC
V.Beckmann (ISDC, Versoix), D.Gotz (CEA-Saclay), S.Mereghetti,
A.Paizis (IASF-Milano), A. Neronov, M. Beck (ISDC, Versoix), and J.
Borkowski (CAMK, Torun) on
behalf of the IBAS Localization Team report:
A long GRB with duration of about 50 s has been detected by IBAS in
IBIS/ISGRI data at 01:21:33 UT on August 14th.
The refined coordinates (J2000) are:
RA: 64.7488 [degrees]
DEC: +60.5796 [degrees]
with an uncertainty of 2.9 arcmin (90% c.l.).
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 9803 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9803 |
| Detection_method |
Swift-XRT Other |
| ra |
64.7546° |
| decl |
60.5901° |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9803
SUBJECT: GRB 090814B: Swift-XRT detection of a possible afterglow.
DATE: 09/08/14 14:28:39 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans (U. Leicester) and W.H. Baumgartner (GSFC/UMBC) report on
behalf of the Swift-XRT team:
The Swift-XRT observed the field of the INTEGRAL GRB 090814B (Beckmann
et al. GCN. Circ. 9795), gathering 900-s of data in the interval T0+9 ks
to T0+14 ks.
In the INTEGRAL error circle we find a single, uncatalogued X-ray source
at RA,Dec=64.7546, 60.5901 which is equivalent to:
RA (J2000): 04h 19m 01.10s
Dec (J2000): +60d 35' 24.34"
with an uncertainty of 3.8 arcsec (radius, 90% confidence).
The source has a count-rate of ~0.03 count/sec, but we are unable to
determine at the present time whether the source is fading.
The spectrum comprises only 24 photons, but it can be well modelled
with an absorbed power-law with photon index Gamma=0.8 (+/-1.3) and a
column density of 9.0 (+16.0, -5.4) x 10^21 cm^-2, in excess of the
Galactic value if 3.6 x 10^21 cm^-2 (Kalberla et al. 2005).
Swift will conduct a further 4-ks observation of this source today.
This circular is an official product of the Swift-XRT team.
|
| GCN 9806 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9806 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9806
SUBJECT: GRB 090814B: Liverpool Telescope Observations
DATE: 09/08/14 16:28:54 GMT
FROM: Zach Cano at ARI/John Moores Liverpool
C. Guidorzi (U. Ferrara), Z. Cano (Liverpool JMU), A. Gomboc
(U. Ljubljana), C.G. Mundell, I.A. Steele, A. Melandri, S. Kobayashi,
C.J. Mottram, D.F. Bersier, R.J. Smith (Liverpool JMU)
report on behalf of a large collaboration:
On 2009 August 14 at 02:57:31 UT the 2-m Liverpool Telescope
automatically began observing the INTEGRAL GRB 090814B (Beckmann et al.,
GCN Circ. 9795) using the g',r' and i' filters.
We do not detect any uncatalogued source inside the Swift-XRT error
circle (Evans et al. GCN Circ 9803) down to the following values:
Mid Time Delay from GRB Total Exp Filter Upper limit
(UT) (hours) (s) Magnitude
-----------------------------------------------------------
03:26:17 2.08 600 R > 21.3
03:27:52 2.11 540 I > 21.0
---------------------------------------------------------
Magnitudes have been calibrated from the nearby USNOB-1 star
04:19:01.476, +60:35:18.11 using R2=18.34 and I=17.14.
We note the considerable Galactic reddening along the GRB
direction: E(B-V)=1.14 (Schlegel et al. 1998).
|
| GCN 9807 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9807 |
| Detection_method |
Swift-UVOT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9807
SUBJECT: GRB 090814B: Swift/UVOT Upper Limits
DATE: 09/08/14 17:39:59 GMT
FROM: Peter Curran at MSSL
P.A. Curran (MSSL-UCL) and W.H. Baumgartner (GSFC/UMBC) report on behalf
of the Swift/UVOT team:
Swift/UVOT observed the field of the INTEGRAL GRB 090814B (Beckmann et
al. GCN. Circ. 9795), gathering 950s of data in the from interval T0+9ks
to T0+14 ks.
No optical afterglow consistent with the Swift XRT position (Evans et
al., GCN 9803) is detected in the UVOT exposures. Preliminary 3-sigma
upper limits, using the UVOT photometric system (Poole et al. 2008,
MNRAS, 383, 627), are:
Filter T_start(s) T_stop(s) Exp(s) Mag
u 8044 14166 506 >20.32
w2 8485 8933 441 >20.30
The values quoted above are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 1.10 in the direction of the burst
(Schlegel et al. 1998).
|
| GCN 9808 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9808 |
| Detection_method |
Optical |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9808
SUBJECT: GRB 090814B: I-band observations from 1.23m CAHA telescope
DATE: 09/08/14 17:50:52 GMT
FROM: Javier Gorosabel at IAA-CSIC
J. Gorosabel (IAA-CSIC), A. de Ugarte Postigo (INAF-OAB), V. Terron
(IAA-CSIC), M. Fernandez (IAA-CSIC), S. Guziy (IAA-CSIC), S. Castillo
(Univ. Malaga), M. Jelinek (IAA-CSIC), P. Kubanek (IAA-CSIC & IPL Univ.
Valencia), A.J. Castro-Tirado (IAA-CSIC), report;
We carried out I-band observations of the INTEGRAL GRB 090814B (Beckmann
et al. GCN 9795) with the 1.23m Calar Alto telescope as follows;
---------------------------------------------------------
Date Time since GRB Exp. Lim.
Start - End Start - End Time Mag.
(UT) (Sec) (Sec) (3 sigma)
---------------------------------------------------------
14.0606 - 14.0739 342 - 1492 5 x 180 19.8
14.0745 - 14.0865 1544 - 2583 3 x 300 19.8
14.0871 - 14.0963 2635 - 3430 2 x 360 20.0
14.0973 - 14.1912 3518 - 11631 10 x 700 20.3
---------------------------------------------------------
No optical object is detected in the XRT position determined by Swift
(Evans et al. GCN 9803) for the upper limits given above. The combination
of all the images sets an upper limit of I = 20.6 with a total exposure
time of 9520s and a mean observing epoch of Aug 14.1259 UT.
|
| GCN 9810 table |
|---|
| GRB_name |
GRB090814B |
| GCN_number |
9810 |
| Detection_method |
Swift-XRT Other |
| Circular_text |
TITLE: GCN CIRCULAR
NUMBER: 9810
SUBJECT: GRB 090814B: Confirmation of the X-ray afterglow
DATE: 09/08/15 08:16:49 GMT
FROM: Phil Evans at U of Leicester
P.A. Evans (U. Leicester) and W.H. Baumgartner (GSFC/UMBC) report on
behalf of the Swift-XRT team:
The Swift-XRT conducted a second observation of GRB 090814B (Beckmann et
al. GCN. Circ. 9795), gathering 3.3 ks of data between T0+48 ks and
T0+60 ks. The source reported by Evans & Baumgartner (GCN Circ. 9803)
has faded to a level of 0.11 ± 0.03 count/sec, with a power-law decay
index of alpha=0.7+/-0.3. This source is thus confirmed as the afterglow
of GRB 090814B.
The results of the XRT-team automatic analysis are available at
http://www.swift.ac.uk/xrt_products/00020107.
This circular is an official product of the Swift-XRT team.
|