GCN Circular 27599
Subject
GRB 200415A: MASTER imspection and possible localisation
Date
2020-04-17T07:49:37Z (4 years ago)
From
Vladimir Lipunov at Moscow State U/Krylov Obs <lipunov@xray.sai.msu.ru>
V. Lipunov, N.Tyurina,
E. Gorbovskoy, V.Kornilov, P.Balanutsa,A.Kuznetsov,F.Balakin,
V.Vladimirov, D. Vlasenko, I.Gorbunov, D.Zimnukhov, V.Senik, T.Pogrosheva,
D.Kuvshinov(Lomonosov Moscow State University, SAI, Physics Department),
A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory),
R. Podesta, C.Lopez, F. Podesta, C.Francile(Observatorio Astronomico Felix
Aguilar OAFA),
H. Levato(Instituto de Ciencias Astronomicas, de la Tierra y del Espacio
ICATE),
R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias),
D. Buckley(South African Astronomical Observatory),
O.A. Gres, N.M. Budnev, O.Ershova (Irkutsk State University, API),
V. Yurkov, A. Gabovich, Yu. Sergienko(Blagoveschensk Educational State
University)
MASTER OTJ 004724.94-252125.6s (AT2020hok)
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic
Net", Advances in Astronomy, 2010, 30L )
proposed interesting source at (RA, Dec) = 00h 47m 24.94s -25d 21m 25.6s
on 2020-04-17.15061 UT during GRB 200415 error box inspection
(GCN 27579; 27580; 27586; 27595; 27597;).
Inside galaxy NGC 0253 (Svinkin, 27595; Frederiks 27597;) there
is an interesting extended object with an XMM X-ray source at 00 47
25.0800 -25 21 23.760 .
This is may be globular cluster: B-V ~ 1
The unfiltered magnitude is 15.8m (mlim 17.9).
The source is seen in 24 images. No optical variability detected.
We have reference image on 2018-08-10.99113 UT with unfiltered
mlim=20.3m.
Follow up observations are required.
The cover map is available at
https://master.sai.msu.ru/site/master2/event.php?id=1337630
The inspection and reference images are available at:
http://master.sai.msu.ru/static/OT/183315.33623157.0.png