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ATel #9055; S. Shurpakov, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, N. Tiurina, V. Kornilov, P. Balanutsa, A. Kuznetsov, I. Gorbunov, V. Vladimirov, E. Popova, D. Kuvshinov (Lomonosov MSU, SAI), S. Potter, A. Kniazev(SAAO)
on 16 May 2016; 08:04 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

Subjects: Optical, Request for Observations, Supernovae, Transient

MASTER OT J062358.29-361855.3 - possible SuperNova in GALEXASC J062358.49-361851.2 galaxy

MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 06h 23m 58.29s -36d 18m 55.3s on 2016-05-15.73896 UT.
The OT unfiltered magnitude is 17.8m (limit 19.1m).
The OT is seen in 3 images. There is no minor planet at this place.
We have reference image without OT on 2015-10-11.07144 UT with 20.7 unfiltered magnitude limit, on 2016-03-23 20:27:16UT with m_lim=18.1.
There is GALEX source in 4.6" in NASA extragalactic database with unknown z. USNO-B1 has a source with B2=18.4,R2=18.5 in 3.7"(possibly host galaxy)
Spectral observations are required.
The discovery and reference images are available at http://master.sai.msu.ru/static/OT/MASTEROTJ062358.29-361855.3.jpg

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