GRB 051105B
GCN Circular 4191
Subject
GRB 051105B (INTEGRAL 2701): Optical observation
Date
2005-11-05T13:19:05Z (20 years ago)
From
Kenzo Kinugasa at Gunma Astro. Obs/Japan <kinugasa@astron.pref.gunma.jp>
K. Kinugasa (Gunma Astronomical Observatory) and K. Torii (Osaka U.) report:
The error region of the INTEGRAL trigger #2701 was imaged by the
robotic 0.25m GETS telescope in the Gunma Astronomical Observatory.
Unfiltered imaging started at 11:14:11 UT (304 s after the trigger)
and 30 s integration was repeated.
Preliminary analysis does not show a new object within the refined
2'.82 radius error region (Seq_Num 1) and the following upper limits
are derived.
------------------------------------------
StartUT Limit Nframes
------------------------------------------
11:14:11 >11.2 1
11:28:40 >15.0 21
------------------------------------------
We note a bright (9th magnitude) star, SAO 215170, within the INTEGRAL
error circle.
GCN Circular 4192
Subject
GRB051105B - A long GRB detected by INTEGRAL
Date
2005-11-05T13:52:31Z (20 years ago)
From
Sandro Mereghetti at IASF/CNR <sandro@iasf-milano.inaf.it>
S. Mereghetti (IASF, Milano), D.Gotz (CEA, Saclay), N. Mowlavi, S. Shaw,
M. Beck, A. Neronov, J.Soldan (ISDC, Versoix) and J. Borkowski (CAMK,
Torun) on behalf of the IBAS Localization Team report:
A 20 s long GRB has been detected by IBAS in IBIS/ISGRI data at 11:05:50
UT on November 5 2005.
Its refined coordinates (J2000) are:
RA: 9.4771 [degrees]
DEC: -40.4812 [degrees]
with an uncertainty of 2 arcmin (90% c.l. radius).
A plot of the light curve will be posted at
http://ibas.mi.iasf.cnr.it/IBAS_Results.html
This message can be cited.
GCN Circular 4193
Subject
GRB 051105b: ART optical limits
Date
2005-11-05T13:55:52Z (20 years ago)
From
Ken ichi Torii at RIKEN <torii@ess.sci.osaka-u.ac.jp>
K. Torii (Osaka U.) reports on behalf of the ART collaboration:
The error region of the INTEGRAL GRB 051105b (Mereghetti et
al. GCN4192) was observed by the 14 inch Automated Response Telescope.
Imaging started at 2005 November 5, 11:07:29 UT (94 s after the
trigger) and 60 s integration in Ic band was repeated. Early data
suffered from low transparency.
We note a bright star, SAO 215170 (V=9.0), within the INTEGRAL error
circle. While no new object is identified and the following upper
limits are derived for an optical afterglow.
------------------------------------------
StartUT Filter Mag Nframes
------------------------------------------
11:19:21 Ic > 7.3 1
11:24:42 Ic >10.7 2
------------------------------------------
GCN Circular 4209
Subject
GRB051105B: Swift/UVOT upper limit
Date
2005-11-08T01:48:53Z (20 years ago)
From
Alexander Blustin at MSSL-UCL <ajb@mssl.ucl.ac.uk>
A. J. Blustin (UCL-MSSL), S. Campana (OAB/ASDC), J. Nousek (PSU),
N. White (GSFC), N. Gehrels (GSFC) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 051105B on
2005-11-05 at 11:05:50 UT, ~2.25 days after the INTEGRAL trigger
(Mereghetti et al., GCN 4192). No new source with respect to the
DSS is observed within the 2 arcminute radius IBAS error circle
in coadded V-band exposures down to the following 5-sigma
magnitude upper limit:
Filter T_range(days) Exp(sec) 5sigUL
V 2.25-2.38 4932 20.4
We note that there was a high image background in the region of
the IBIS error circle due to the presence of a Vmag=9 star within
it (as mentioned by Torii, GCN 4193).
GCN Circular 4210
Subject
GRB051105B: Swift/XRT upper limit
Date
2005-11-08T10:33:57Z (20 years ago)
From
Gianpiero Tagliaferri at OAB-INAF <taglia@merate.mi.astro.it>
T. Mineo (INAF-IASF PA), S. Campana (INAF-OAB),
G. Chincarini (INAF-OAB and UNIMIB), D. Malesani (SISSA),
A. Moretti (INAF-OAB), P. Romano (INAF-OAB),
G. Tagliaferri (INAF-OAB) on behalf of the Swift XRT team
The Swift/XRT began observing the field of GRB 051105B
on 2005-11-07 at 16:41:31 UT, about 2.25 days after the
INTEGRAL trigger (GCN 4192; Mereghetti et al.).
A weak X-ray source is detected at RA(2000)=00h 37m 53.7s'
Dec(2000)=-40d 29m 14s, with an estimated uncertainty
of 7 arcsec (90% containment), including corrections
for the XRT boresight offset. This source is 3.7 arcsec away
from the bright star HD 3516, which we identify as the optical
counterpart. No other X-ray source is detected within the BAT
error circle. The 3 sigma upper limit is 1.1E-03 cts/s corresponding
to an unabsorbed 0.2-10 keV flux of 5E-14 erg cm^-2 s^-1, assuming
a power-law model with an energy index slope of -1 and a
Galactic absorbing column of 3.0E20 cm^-2.
GCN Circular 4223
Subject
GRB051105B: REM Optical observation
Date
2005-11-09T11:21:56Z (20 years ago)
From
Silvia Piranomonte at OAR <piranomonte@mporzio.astro.it>
E. Distefano, S. Piranomonte, E. Molinari, G. Chincarini, F.M. Zerbi, M.
Rodono', S. Covino, V. Testa, G. Tosti, F. Vitali, L.A. Antonelli, P.
Conconi, G. Cutispoto, G. Malaspina, L. Nicastro, E. Palazzi, E. Meurs,
P. Goldoni, on behalf of the REM/ROSS Team report:
On Nov 05, 2005 the field of GRB051105B (Mereghetti et al. GCN4192)
has been observed with the REM telescope located in La Silla (Chile).
The field was imaged with ROSS REM instrument in R, V and I filters
starting at 2005-11-06T02:20:58 UT (approximately 1 hour
after the burst) for a total integration time of 120 seconds for each
filter.
No sources are detected within IBAS Integral error circle (Mereghetti et
al. GCN4192) down to a limiting magnitude of 17.9, 17.1, 18.4
respectively (3-sigma upper limit).