MASTER Official Science Release N2
MASTER
VWF4 Kislovodsk GRB081102 prompt optical oservation
The GRB error-box video from northern and southern cameras MASTER VWF4 since 4 minutes
before to 4 minutes after BAT trigger time.
Noise path from northern and southern cameras
Coadd 6 set from bosh northern and southern cameras (total 60 sec exosure
on each sets) 3 sigma limit is 12.7m
| 30 sec before GRB |
30 sec during GRB |
30 sec after GRB |
 |
 |
 |
All non animated images in jpeg format here
Coadd both south and north camera film
GRB081102 (GCN
8516 | GCN
8471 | GCN 8464) -
TITLE: GCN CIRCULAR
NUMBER: 8516
SUBJECT: GRB 081102: MASTER refind and final results
DATE: 08/11/11 15:50:10 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs
E. Gorbovskoy, V. Lipunov, V.Kornilov,
A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.Parkhomenko
Kislovodsk Solar Station of the Pulkovo Observatory
V.Krushinski, I.Zalognikh
Ural State University, Kourovka
S.Yazev, K.Ivanov
Irkutsk State University
Two of the four MASTER Very Wide Field Cameras located at Kislovodsk
(http://apollo.sai.msu.ru/, D=50 mm, 4x1000 square degrees, 35'' per pix)
has
observed the Swift-BAT GRB081102 error box (Mangano et al., GCN Circ
8470, Lipunov et al., GCN 8464, 8471)
with 5s exposures during all night without time gap between images. There
are two separeted (~702m) mount with double cameras.
Now we present results from the North and South mounts.
These unfiltered images are calibrated relative to Tycho stars (V).
We do not detect any new source at the XRT position
reported in GCN Circ. 8470 (Mangano et al.) brighter than 13.0
mag before and after trigger time.
The photometry results +-4 min around trigger time:
T-T_trigger m_lim (S/N=3) Exposure Coadd
-255s... 0... 255 s 11.8 5s yes
-2min...0...+2 min 12.7 2x30s 12
-2min...0...+2 min 13.0 2x60s 24
The optical fluence during the 40s-GRBurst is limited by
<= 1.6x10_-8 erg/cm_2
including 2.8 magnitude absorbtion (Ukwatta et al., Circ 8462).
The BAT-fluence is aboute 2.3x10_-6 erg/cm_2 (15-150 keV)
(Fenimore et al., GCN 8468).
So:
Optical Fluence/Gamma-Fluence(15-150keV) ~ < 1/140
Same ratio for GRB080319B is ~ 1/25 (Naked Eye GRB) in 15-150 keV
(Racusin, Karpov et al., Nature, vol.455, 183, 2008).
Scientific Master Team Report are available at
http://observ.pereplet.ru/images/GRB081102/grb_film.html
Note: the GRB was at the edge of the FOW in both cameras.
The message may be cited.
mailto: lipunov@sai.msu.ru
----------------------------------------------------------------
TITLE: GCN CIRCULAR
NUMBER: 8471
SUBJECT: GRB 081102: MASTER prompt optical limit
DATE: 08/11/03 20:06:42 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs
MASTER-Net Team (http://observ.pereplet.ru):
V. Lipunov, V.Kornilov, E.Gorbovskoy,
A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, A.Parkhomenko
Kislovodsk Solar Station of the Pulkovo observatory
V.Krushinski, I.Zalognikh
Ural State University, Kourovka
S.Yazev, K.Ivanov
Irkutsk State University
MASTER Very Wide Field Camera located at Kislovodsk (2000 m)
(http://apollo.sai.msu.ru/, D=50 mm, 4x1000 square degrees, 35'' per pix)
has observed the Swift-BAT GRB081102 error box (Ukwatta et al., GCN Circ
8642)
with 5s exposures during all night without windows between images.
There are two separeted (~702m) mount with double cameras.
Now we present results from North camera.
These unfiltered images are calibrated relative to Tycho stars (V).
We do not detect any new source at the XRT position
reported in GCN Circ. 8467 ( Osborne et al.) brighter than 12.4 mag
before and after trigger time.
The photometry results +-4 min around trigger time:
T-T_trigger m_lim (S/N=3) Exposure Coadd
-255s... 0... 255 s 11.6 5s no
-2min...0...+2 min 12.2 30s 6
-2min...0...+2 min 12.4 60s 12
The optical fluence during the 60s-GRburst is limited by <= 6x10_-9
erg/cm_2 including 2.5 magnitude absorbtion (Ukwatta et al., Circ
8462). The BAT-fluence is aboute 3 10_-6 erg/cm_2 (15-150 Kev)
(http://gcn.gsfc.nasa.gov/notices_s/333427/BA/).
So
Optical Fluence/Gamma-Fluence ~ < 1/500
Same ratio for GRB080319B is ~ 1/200 (Naked Eye GRB).
The light curve is available at
http://observ.pereplet.ru/images/GRB081102/lc1.png
The video are available at
http://observ.pereplet.ru/images/GRB081102/grb.gif
You can see 200 sets.
Note: the GRB was at the edge of the FOW.
The reduction is continuing.
mailto: lipunov@sai.msu.ru
--------------------------------------------------------------------
TITLE: GCN CIRCULAR
NUMBER: 8464
SUBJECT: GRB 081102: MASTER VWF promt observation
DATE: 08/11/02 22:34:37 GMT
FROM: Vladimir Lipunov at Moscow State U/Krylov Obs
MASTER-Net Team (http://observ.pereplet.ru):
V. Lipunov, V.Kornilov, E.Gorbovskoy,
A.Belinski, N.Shatskiy, N.Tyurina, D.Kuvshinov, P.Balanutsa
Sternberg Astronomical Institute, Moscow State University
A. Tlatov, I.Golubov
Kislovodsk Solar Station of the Pulkovo observatory
V.Krushinski, I.Zalognikh
Ural State University, Kourovka
S.Yazev, K.Ivanov
Irkutsk State University
MASTER Very Wide Field Camera located at Kislovodsk (2000 m)
(http://apollo.sai.msu.ru/, D=50 mm, 4000 square degrees, 35'' per pix)
has observed the Swift-BAT GRB081102 error box (Ukwatta et al., GCN Circ
8642) with 5s exposures starting before, during and after the GRB time.
These unfiltered images are calibrated relative to USNO A2.0 (R).
The limit of the each image is aboute 11.1 (S/N=3).
The reduction is continuing.
mailto: lipunov@sai.msu.ru
