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GRB 120129A

GCN Circular 12904

Subject

IPN Triangulation of GRB 120129A (long/intense)

Date

2012-01-30T18:38:05Z (13 years ago)

From

Valentin Pal'shin at Ioffe Inst <val@mail.ioffe.ru>

S. Golenetskii, R. Aptekar, E. Mazets, V. Pal'shin, D. Frederiks,
D. Svinkin, and T. Cline on behalf of the Konus-Wind team,

K. Hurley, and J. Goldsten, on behalf of the MESSENGER NS GRB team,

V. Connaughton, M. Briggs, and C. Meegan, on behalf of the Fermi
GBM team,

S. Barthelmy, J. Cummings, N. Gehrels, H. Krimm, and D. Palmer, on 
behalf of the Swift-BAT team,

G. Di Cocco, F. Fuschino, M. Galli, C. Labanti, and M. Marisaldi,
on behalf of the AGILE MCAL team, and

E. Costa, E. Del Monte, I. Donnarumma, Y. Evangelista, M. Feroci,
I. Lapshov, F. Lazzarotto, L. Pacciani, M. Rapisarda, P. Soffitta,
for the SuperAGILE team, report:

The long-duration, very intense GRB 120129A was observed by Konus-Wind, 
MESSENGER (GRNS), AGILE (MCAL and SuperAGILE), Fermi (GBM), and Swift 
(BAT) at about 50146 s UT (13:55:46). The burst was outside the coded 
fields of view of the BAT and SuperAGILE.

We have triangulated it to a preliminary, 3 sigma error box whose
coordinates are:
  ---------------------------------------------
   RA(2000), deg                 Dec(2000), deg
  ---------------------------------------------
  Center:
    30.440 (02h 01m 46s) +59.282 (+59d 16' 55")
  Corners:
    23.362 (01h 33m 27s) +68.842 (+68d 50' 33")
    31.740 (02h 06m 58s) +56.353 (+56d 21' 09")
    34.401 (02h 17m 36s) +51.346 (+51d 20' 44")
    28.869 (01h 55m 29s) +62.399 (+62d 23' 58")
  ---------------------------------------------

The error box area is 2.7  sq. deg, and its maximum
dimension is 18.3 deg.

This box can be improved.

The time history and spectrum will be given in a forthcoming GCN Circular.

A triangulation map is posted at
http://www.ioffe.ru/LEA/GRBs/GRB120129_T50148/IPN/

GCN Circular 12905

Subject

Konus-Wind observation of GRB 120129A

Date

2012-01-31T10:18:12Z (13 years ago)

From

Dmitry Frederiks at Ioffe Institute <fred@mail.ioffe.ru>

S. Golenetskii, R.Aptekar, D. Frederiks, E. Mazets, V. Pal'shin,
P. Oleynik, M. Ulanov, D. Svinkin, and T. Cline on behalf
of the Konus-Wind team, report:

The long intense GRB 120129A
(localized by IPN: Golenetskii et al., GCN 12904Loading...
 
 )
triggered Konus-Wind at T0=50148.403s UT (13:55:48.403).
The observation is performed against very high and variable
background count rate caused by solar charged particles.

The burst light curve shows two bright partly overlapped pulses.
A total duration of the burst is ~4 s.
The emission is seen up to ~5 MeV.
The Konus-Wind light curve of this GRB is available at
http://www.ioffe.ru/LEA/GRBs/GRB120129_T50148/

As observed by Konus-Wind the burst
had a fluence of (2.7 � 0.7)x10-5 erg/cm2,
and a 16-ms peak flux, measured from T0+0.672 s,
of (3.3 � 1.0)x10-5 erg/cm2/s
(both in the 20 keV - 10 MeV energy range).

The time-integrated spectrum of the burst
(measured from T0 to T0+3.328 s)
is best fitted in the 20 keV - 5 MeV range
with the GRB (Band) model, for which:
the low-energy photon index alpha = -0.76 (-0.09, +0.09),
the high energy photon index beta = -2.9 ( <-2.3),
the peak energy Ep = 326(-38, +52) keV,
chi2 = 66.5/76 dof.

The spectrum at the maximum count rate
(measured from T0+0.512 to T0+0.768 s) is best fitted
is best fitted in the 20 keV - 5 MeV range
with the GRB (Band) model, for which:
the low-energy photon index alpha = -0.51 (-0.19, +0.21),
the high energy photon index beta = -2.3 (-1.4, +0.3),
the peak energy Ep = 317(-66, +92) keV,
chi2 = 54.2/61 dof.


All the quoted results are preliminary.
All the quoted errors are at the 90% confidence level.

GCN Circular 12907

Subject

GRB 120129A: MASTER optical observations

Date

2012-01-31T14:59:21Z (13 years ago)

From

Vladimir Lipunov at Moscow State U/Krylov Obs <gcncirc@observ.inetcomm.ru>

E. Gorbovskoy, V. Lipunov,  V.Kornilov, D.Kuvshinov, A.Belinski, N.Tyurina, 
N.Shatskiy, P.Balanutsa, V.V.Chazov,  A.Kuznetsov,
D.Zimnukhov, M. Kornilov, A.Kuznetsov, D.Zimnukhov, M. Kornilov,
A.Sankovich, S. Shurpakov
Moscow State University,  Sternberg Astronomical Institute


O.Gres, O.Chuvalaev,K.Ivanov, V.A.Poleshchuk, S.Yazev, N.M.Budnev
  Irkutsk State University

  V.Krushinski, I.Zalozhnich, A. Popov
Ural State University, Kourovka

E. Sinykov, V.Yurkov, Yu.Sergienko, D.Varda,
Blagoveschensk Educational State University, Blagoveschensk

A. Tlatov, A.V. Parhomenko, D. Dormidontov, V.Sennik
Kislovodsk Solar Station of the Pulkovo Observatory



  MASTER II  robotic double telescope (FOW=2x4 square degrees, 
http://observ.pereplet.ru) located in Tunka was observed  the 
GRB120129A (S. Golenetskii et al., GCN Circ 
12904Loading...
 
 ) IPN triangulation error-box  using 9 diffent fields.
Observations  proceeded since 2012-01-30 20:50  to 2012-01-30 22:50 i.e 
aprox. 1.3 days after grbtime.
On our  images we haven`t found an optical transient
within IPN error-box (S. Golenetskii et al., GCN Circ 12904Loading...
 
 ).
Unfiltred upper limit is 18.5 on each image.

  There is a one strange OT MASTER022229.64+523924.9 
which seen only at one image.

      Date    time             Ra                Dec         Mag
  2012-01-30 22:50:52.423  02h 22m 29.64s , +52d 39m 24s.9 15.37

  The object is not seen on images given after (10 hours) and before (1 
hour) detection time.

A preview of this object  available here 
http://master.sai.msu.ru/static/OTMASTER022229_523924.png

  Our very wide fiels cameras (FOW=2x420 square degrees) synchronously 
with GRB have covered area directly under the errors-box.

  A coverage map available here http://master.sai.msu.ru/static/GRB120129A_MASTER_Cover.png

The message may be cited.