MASTER-SAAO: contradictory SN and flaring OT
ATel #10550; P. Balanutsa, V. Lipunov (Lomonosov MSU), D. Buckley (SAAO), E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Kornilov, O. Gress, T. Pogrosheva, V. Shumkov, V. Vladimirov, D. Vlasenko, D. Kuvshinov (Lomonosov Moscow State University, SAI), A. Gabovich (BSPU)
on 1 Jul 2017; 14:15 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Supernovae, Transient, Variables
MASTER OT J034250.70-015228.7 - SN in PGC135685, =ATLAS17dcl, but the Type can't be Ia
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 03h 42m 50.70s , -01d 52m 28s.7 on 2017-07-01.1753UT with unfiltered m_PSN=16.6 (6 images), that contradicts to Ia type detected in ATEL #10240 , ATEL #10225 for ATLAS17dcl ( http://www.supernova.thistlethwaites.com/sn2017/sndate.html ).
It is in 8.4"W,20"S of PGC135685 with Btc=15.13, Vgsr=2773 http://leda.univ-lyon1.fr/ledacat.cgi?PGC135685
Spectral observations are required.
MASTER discovery and reference images are http://master.sai.msu.ru/static/OT/MASTEROTJ034250.70-015228.7.jpg
MASTER OT J123136.88-172313.5: flaring OT detection
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 12h 31m 36.88s -17d 23m 13.5s on 2017-06-23.81919 UT.
The OT unfiltered magnitude is 19.3m (mlim=20.4).
The OT is seen in 3 images from 4:
2017-06-23 19:34:41 mlim=20.2 no OT
2017-06-23 19:39:38 m_OT=20.0
2017-06-23 19:47:52 m_OT=19.9
2017-06-23 19:59:27 m_OT=19.3
We have reference images without OT on 2015-04-24.86152 UT with unfiltered mlim=20.0m, on 2017-03-10 22:46:22 with mlim=18.7, on 2016-08-10 17:58:07 with mlim=19.5, on 2016-03-16 20:31:47 with mlim=20.0.
There is Gaia source in 0.479 with Gmag=19.7 in history
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/123136.88-172313.5.png
MASTER Global Robotic Net
