Аннотация: MASTER OT J100540.87+134751.1 - possible SuperNova
MASTER-Kislovodsk auto-detection system ( Lipunov et al., Advances in Astronomy, MASTER Global Robotic Net, 2010 ) discovered OT source at (RA, Dec) = 10h 05m 40.87s +13d 47m 51.1s on 2015-02-21.85407 UT.
The SN unfiltered magnitude is 18.2m (limit 20.2m). The OT is seen in 6 images. There is no minor planet at this place.We have reference image without SN on 2010-02-07.88314 UT with unfiltered magnitude limit 20.0m.
The discovery and reference images are available at: : http://master.sai.msu.ru/static/OT/100540.87134751.1.png
Spectral observations are required.
MASTER OT J061451.70-272535.5 - new CV
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 06h 14m 51.70s -27d 25m 35.5s on 2015-02-19.96990 UT.
The OT unfiltered magnitude is 18.3m (limit 19.4m).There are 5 images in MASTER-SAAO database on 2015-02-19. We have reference image without OT on 2015-02-06.92896 UT with 19.4m unfiltered magnitude limit. We have image with OT (m_OT=18.8) on 2015-01-10.996 UT (the unfiltered limit is 18.8).
Spectral observations are required.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ061451.70-272535.5.jpg
MASTER OT J125857.30-284131.5 - new CV
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 12h 58m 57.30s -28d 41m 31.5s on 2015-02-21.94970 UT. The OT unfiltered magnitude is 18.0m (the limit is 20.2m).
There are 7 images with OT in MASTER-SAAO database . We have reference image without OT on 2015-01-19.05605 UT with unfiltered magnitude limit 19.8m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/MASTERJ125857.30-284131.5.jpg
Spectral observations are required.
MASTER OT J185727.96+153920.8 - new CV
MASTER-Kislovodsk auto-detection system discovered OT source at (RA, Dec) = 18h 57m 27.96s +15d 39m 20.8s on 2015-02-23.09990 UT.
The OT unfiltered magnitude is 16.2m (the limit is 18.6m).The OT is seen in 3 images.
We have reference image without OT on 2014-11-19.64175 UT with unfiltered magnitude limit 18.5m.
The discovery and reference images are available at: http://master.sai.msu.ru/static/OT/185727.96153920.8.png