Аннотация: MASTER OT J122149.13-035808.6 - optical flare detection of the radio source AT20G J122148-035808
MASTER-SAAO auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 12h 21m 49.13s -03d 58m 08.6s on 2015-05-16.867 UT. The OT unfiltered magnitude is 17.6m (limit 20.3m).
There are 6 images with OT from 2015-05-16.867 to 16.889 UT.
There are images of previous flares on 2010-04-20.867UT with unfiltered(0.2B+0.8R) m_OT=18.4, and on 2012-01-29.035UT with m_OT=17.8 in MASTER-Kislovodsk database, and on 2014-04-19.595UT with unfiltered m_OT=17.3 in MASTER-Tunka database.
We have reference image without OT on 2015-04-21.78898 UT with unfiltered magnitude limit 18.3m.
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/122149.13-035808.6.png
MASTER OT J111357.37-465849.1 discovery - possible SuperNova in 2MASX J11135724-4659145 galaxy or Dwarf Nova outburst(Ampl > 4.5)
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 11h 13m 57.37s -46d 58m 49.1s on 2015-05-17.85703 UT. The OT unfiltered magnitude is 17.5m (limit 19.3m).
This OT is seen in 4 images. There is no minor planet at this place. We have reference image without OT on 2015-02-15.03646 UT with 20.2 unfiltered magnitude limit.
This OT is in 25.5"N of the center of 2MASX J11135724-4659145 galaxy (v_hel=13145, m_b=16.5, GALEXASC/SUMSS, etc).
There is no any known source in VIZIER database, and during CRTS survey.
So this MASTER OT can be both PSN and dwarf nova in outburst with Ampl>4.5m .
Spectral observations are required. The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/111357.37-465849.1.png