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MASTER: bright PSN in PGC93974 during Fermi 536085249 trigger inspection

ATel #11105; P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, V. Kornilov, N. Tiurina, O. Gress, A. Kuznetsov, V. Vladimirov, D. Vlasenko, D. Zimnukhov, V. Chazov, A. Gabovich (Lomonosov MSU)
on 29 Dec 2017; 07:52 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Cataclysmic Variable, Supernovae, Transient

Referred to by ATel #: 11106, 11129

MASTER OT J104021.29-462510.8 - SN in 18.7" of bright PGC93974 - S0 galaxy with AGN

During Fermi trigger 536085249 inspection
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 10h 40m 21.29s -46d 25m 10.8s on 2017-12-27.91284 UT
in 18.7" of bright AGN(Sy2) S0 galaxy PGC93974 (Vgsr=6942,Absolute blue mag=-18.89 (White et al. 2011) .

The OT unfiltered magnitude is 16.1m(mlim=18.8).

The OT is seen in 5 images. There is no minor planet at this place.
We have reference image on 2017-04-17.80523 UT with unfiltered mlim= 20.8m.
Spectral observations are required.
The discovery and reference images are available at:


List of Optical Transients discovered by MASTER

MASTER Global Robotic Net