MASTER: OT with 5.8mag amplitude of outburst
ATel #11834; P. Balanutsa, V. Lipunov (Lomonosov MSU), R. Podesta (OAFA), H. Levato (ICATE), D. Buckley(SAAO), V. Kornilov, E. Gorbovskoy, N. Tiurina, I. Gorbunov, A. Kuznetsov, V. Chazov, D. Vlasenko, V. Vladimirov, O. Gress (Lomonosov Moscow State University, SAI), C. Lopez, F. Podesta (Observatorio Astronomico Felix Aguilar San Juan University), C. Saffe (Instituto de Ciencias Astronomicas, de la Tierra y del Espacio)
on 9 Jul 2018; 18:47 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J104822.39-453356.8 detection - dwarf nova outburst, ampl>5.8m
MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 10h 48m 22.39s -45d 33m 56.8s on 2018-07-09.07564 UT.
The OT unfiltered magnitude is 15.2m (mlim=18.6m).
The OT is seen in 2 inspect images. There is no minor planet at this place.
We have reference image without OT on 2017-12-08.18951 UT with 18.2 unfiltered magnitude limit (MASTER-OAFA), on 2016-05-02 19:04:07UT with mlim=21.0(MASTER-SAAO) .
so the amplitude of current outburst is more then 5.8m
There is USNO-B1 star with previous outburst in 1982.5 .
Spectral observations are required.
The discovery and referenceimages are available at http://master.sai.msu.ru/static/OT/104822.39-453356.8.png
List of Optical Transients discovered by MASTER
MASTEr Global Robotic Net