GCN Circular 4206
Subject
GRB051103: MASTER: OT limit and host galaxy candidates
Date
2005-11-07T14:34:45Z (19 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>
V. Lipunov, V.Kornilov, D.Kuvshinov, N.Tyurina, A.Belinski, E.Gorbovskoy,
A.Krylov, G.Borisov, A.Sankovich, G.Antipov, V.Vladimirov
Sternberg Astronomical Institute, Moscow Union 'Optic'
MASTER robotic system (http://observ.pereplet.ru) responded to
GRB051103.4 (GRB_TIME is 2005-11-03 09:25:43.785, S. Golenetskii et al.,
GCN4197) at several minutes after GCN Circ4197 time (GCN4198).
The first image (6 square degrees) was at 2005-11-05 19:55:47 UT, 2 days
10:30:03.215 after the GRB time.
We have 36 images with total exposition 1080 s between 19:55:47 -
21:45:17 on 6 square degrees area. The robot not find
OT-candidate in IPN error box.
Our upper limit of the sum is about 18.5 m (the wether was not very
good).
The unfiltered images are calibrated
relative to USNO A2.0 (0.8 R + 0.2 B).
There are 4 galaxies overlaps and inside IPN error box (see image):
Name Type Coordinates (J2000) Magnitude Redchift Diameter
B MASTER 25isophot
NGC3031 (M81) Sab - 7.8 - 0.000376 big
NGC3034 (M82) S? - 9.2 - 0.000677 big
PGC2719634 ? 09 51 32.25 +68 31 23.4 17.8 16.7 ? 16".9
PGC028505 E 09 53 10.17 +69 00 02.1 ? 14.8 ? 6".0
M81 as candidate (S. Golenetskii et al., GCN4197) for SGR host
galaxy is high probable, but we note that
error box placed outside spiral arms region, where the progenitor of high
magnetized Neutron Star formated. However structure of the galaxy is
distorted by tidal intaractions. For example there is Ultraluminous X-ray source
M81 X-9 (see Wang, 2002, http://arxiv.org/abs/astro-ph/0201230 ) on same
distance from M81 center (this source is not in error box and belong to
high mass binary population). There is now known SN remnants in error
box (see for example D.Matonick and R.Fessen, ApJ SS 112,49,1997 which
not investigated IPN error box region).
We stress on elliptical galaxy PGC028505.
This galaxy close to center of the IPN error box.
The distance to PGC028505 can be estimated as about 80 Mpc.
Assuming this burst originated from a source PGC028505,
the isotrpoic energy release of this GRB is ~2x10^49 erg.
This energy is about 1 order more than GRB050509b one associated with
elliptical galaxy (Barthelmy et al., GCN3385).
In any case X-ray and optical observations (for search SNR) highly needed.
The sum JPG-image is available at
http://observ.pereplet.ru/images/GRB051103.4/sum36.jpg .
The IPN error box and galaxies are presented.
This work is supported by RFFI 04-02-16411 grant.
This message can be cited.
Mailto: lipunov@sai.msu.ru
