Аннотация:MASTER-SAAO robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)
located in South African Astronomical Observatory,
automatically started inspect of the ICECUBE Alert190104.36 error-box
(23 57 19 dec=-25 21 57, r=1.23 taken from the IceCube-MASTER socket )
36615 sec after notice time and 36655sec after trigger time at 2019-01-04 18:45:33 UT.
The 5-sigma upper limit on our first (180s exposure) set is 18.4 mag
IceCube publishied error-box differs from socket one (Kopper et al. GCN 23605)
MASTER cover map will be available here
http://master.sai.msu.ru/static/IC/MASTERIC190104.36.png
There are the following sources in IceCube error box:
1) 4 blazars from Roma BZCAT
5BZBJ2350-2436 357.59720 -24.60083 0.193 16.2 , dist= 2.085 deg
5BZQJ2352-2825 358.22070 -28.43111 1.662 19.1 , dist= 1.797 deg
5BZQJ2353-2743 358.29776 -27.72378 0.889 17.9 , dist= 1.120 deg
5BZQJ2357-2451 359.34937 -24.85089 1.614 19.3 , dist= 2.261 deg
2) 3 known supernovae : LSQ12gdj, SN1993ah, PTF11klo
3) 62 xray sources
4) 75 radio-sources
5) 3297 galaxies inside 2.28 deg radii
6) 2 variable sources from AAVSO database
VZ Scl 23 50 09.25 -26 22 52.6 (type : NL/VY+E)
ATLAS18tyo 23 52 08.06 -27 48 07.7 (type : UG)
MASTER Global Robotic Net continues inspection.
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The error-box center's galactic latitude b = -78 deg., longitude l = 40 deg.
The observations started at zenit distance = 41 deg.
The moon ( 2 % bright part)was below the horizon (
The altitude of the Moon was -22 deg ( 2 % bright part)
Observations started at twilight, the sun altitude was -11.4 deg.