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MASTER: possible SLSN in SDSS galaxy

ATel #10099; T. Pogrosheva, V. Lipunov (Lomonosov MSU), R. Rebolo, M. Serra-Ricart (IAC), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, P. Balanutsa, V. Kornilov, O. Gress, V. Vladimirov (Lomonosov Moscow State University, SAI)
on 20 Feb 2017; 00:00 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Supernovae, Transient, Variables

Referred to by ATel #: 10112

< MASTER OT J161308.18+260953.3 discovery - PSN in 0.46" from SDSS galaxy with rgal=21.186 MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 16h 13m 08.18s +26d 09m 53.3s on 2017-02-16.12905 UT.
The OT unfiltered magnitude is 18.0m (mlimit=18.6m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image without OT on 2016-02-13.21289 UT with unfiltered magnitude limit 20.2m.
There is SDSS galaxy with rmag=21.186 in 0.46arcsec
In this Scenario it can be Superluminous SN
There is no OT on last MASTER image on 2016-12-25 01:46:23UT with mlim=18.6
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/161308.18260953.3.png

List of Optical Transients discovered by MASTER

MASTER Global Robotic Net