[vsnet-grb-info 22704] GRB 190613A: MASTER OT detection

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  24803
SUBJECT: GRB 190613A: MASTER OT detection 
DATE:    19/06/13 07:48:54 GMT
FROM:    Vladimir Lipunov at Moscow State U/Krylov Obs  <lipunov at xray.sai.msu.ru>

V. Lipunov, E.Gorbovskoy, V.Kornilov, N.Tiurina, A.Kuznetsov, I.Gorbunov, 
V.Vladimirov, P.Balanutsa, D.Vlasenko, D.Zimnukhov, F.Balakin,A. Chasovnikov,
V.Topolev, V.Senik, D.Kuvshinov(Lomonosov Moscow State University, SAI, Physics Department),

R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres (The Instituto de Astrofisica de Canarias),

D. Buckley (South African Astronomical Observatory),

R. Podesta, C. Lopez, C.Francile, F. Podesta (Observatorio Astronomico Felix Aguilar OAFA, San Juan National University),

H.Levato (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio ICATE, SJNU)

O. Gress, N.M. Budnev, O.Ershova, S.Yazev (Applied Physics Institute, Irkutsk State University),

V. Yurkov, A. Gabovich, Yu. Sergienko, D. Kobcev (Blagoveschensk Educational State University),

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

MASTER-IAC robotic telescope (MASTER Global Robotic Net:  Lipunov et al., 
2010, Advances in Astronomy,vol.2010, 30L  (http://observ.pereplet.ru)
located in Spain (IAC Teide Observatory) was pointed to 
the  GRB 190613A (Swift alert, Ambrosi et al. GCN 24798, Fermi 
localization GCN 24799, BALROG localization Burgess et al. GCN 24800)
38 sec after notice time (104 sec after trigger time)
at 2019-06-13 04:09:09 UT (Lipunov et al. GCN 24802).

On our first (20s exposure)  set MASTER auto-detection system
found 1 optical transient within Swift error-box (ra=182.558 dec=67.2325 r=0.05) 
brighter than 16.4.


  T-Tmid      Date      Time       Expt.        Ra                Dec           Mag
---------|---------------------|-------|-----------------|-----------------|-------
      114   2019-06-13 04:09:09      20   ( 12h 10m 07.08s , +67d 14m 06.5s)    15.96


this OT, discovered by Swift and also confirmed by KAIT(Ambrosi et al. GCN 24798, WeiKang Zheng et al. GCN 24801)

The 5-sigma upper limit has been about 16.4mag