GCN Circular 22942
Subject
IceCube-170922A: First Optical observations of the Neutrino Trigger by MASTER Global Net and 25 IceCube alerts inspection.
Date
2018-07-12T16:51:56Z (7 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, E. Gorbovskoy, V.Kornilov, N.Tiurina, A.Kuznetsov, V.Chazov,
I. Gorbunov, D. Vlasenko, D.Zimnukhov, D.Kuvshinov, P.Balanutsa, V.Vladimirov
Lomonosov Moscow State University,SAI
D. Buckley,
South African Astronomical Observatory (SAAO)
R. Rebolo, M. Serra, N. Lodieu, G. Israelian, L. Suarez-Andres
The Instituto de Astrofisica de Canarias (IAC)
A. Tlatov, V.Senik, D. Dormidontov
Kislovodsk Solar Station of the Pulkovo Observatory
R. Podesta, F. Podesta, C. Lopez, C.Francile
Observatorio Astronomico Felix Aguilar (OAFA)
H.Levato,
Instituto de Ciencias Astronomicas, de la Tierra y del Espacio (ICATE)
O. Gres, N.M.Budnev , Yu.Ishmuhametova
Irkutsk State University (ISU)
A. Gabovich, V. Yurkov, Yu. Sergienko
Blagoveschensk Educational State University, Blagoveschensk
MASTER-Tavrida robotic telescope (MASTER-Net: http://observ.pereplet.ru)
located in Crimea was pointed to the IceCube-170922A (Kopper et al.
GCN #21916; ) 27 sec after notice
time and 73 sec after trigger time at 2017-09-22 20:55:43 UT. On our first
(180s exposure) set we cleary detected TXS 0506+056 within ICECUBE
error-box (ra=77.2833 dec=5.75139 r=0.25).
The 5-sigma upper limit has been about 17.5 mag on single and 19.5 on
coadd images.
Since 2017-09-22 20:55:43 (i.e 73 sec after trigger) till 2017-09-18 we
have ~ 300 observations provided by MASTER-Tavrida, MASTER-SAAO,
MASTER-OAFA, MASTER-Kislovodsk and MASTER-Blagoveschensk.
The object zenith distance was 84 degree at a time of first observations
and it was rise.
Unfortunately, we were extremely busy at this time handling the kiln on
August 17, 2017, which we detected independent of the Chilean
telescopes (Abbot et al 2017ApJ...848L..12A; Lipunov et al.
2017ApJ...850L...1L).
Our telescopes react to 25 IceCube neutrino alerts ( 5874 images!),
starting with the famous
neutrino triplet in whose publication we participate and made a decisive
contribution to the optical inspection (Aartsen et al 2017, A&A, Vol 607,
A115, DOI: 10.1051/0004-6361/201730620)
Just in case, we report that we have previous, synchronous and subsequent
optical observations of the ICECube neutrino alert on June 2018.
Just in case, we report that we have precursor and synchronous
observations of the neutrino alert of June 2018 with QSO inside 2 sigma
error box.
The message may be cited.