MASTER OT J082936.80-662225.5 and MASTER OT J212145.40+332617.7 optical outbursts
ATel #14435; V. Shumkov, T. Pogrosheva, V. Lipunov, V. Kornilov, E. Gorbovskoy, O. Gress, N. Tiurina, P. Balanutsa, F. Balakin, V. Vladimirov, A. Kuznetsov, K. Zhirkov, D. Vlasenko, I. Gorbunov, D. Zimnukhov, V. Senik, A. Chasovnikov, A. Pozdnyakov, V. Topolev, D. Cheryasov, V. Shumkov (Lomonosov Moscow State University, SAI, Physics Department), R. Podesta, C. Lopez, F. Podesta, C. Francile (Observatorio Astronomico Felix Aguilar OAFA), R. Rebolo, M. Serra(The Instituto de Astrofisica de Canarias), D. Buckley (South African Astronomical Observatory), N. M. Budnev (Irkutsk State University, API), A. Tlatov, D. Dormidontov (Kislovodsk Solar Station of the Pulkovo Observatory), A. Gabovich, V. Yurkov (Blagoveshchensk State Pedagogical University)
on 3 Mar 2021; 16:15 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)
Subjects: Optical, Request for Observations, Cataclysmic Variable, Transient, Variables
MASTER OT J082936.80-662225.5 - dwarf nova outburst, ampl>4m (only GSC2.3.2 in VIZIER)
MASTER-SAAO auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 08h 29m 36.80s -66d 22m 25.5s on 2021-03-02.96550 UT.
The OT unfiltered magnitude is 18.0m (mlim=19.1).
The OT is seen at 3 images . There is no minor planet at this place.
We have reference image on 2015-03-14.88086 UT with unfiltered mlim= 20.1m, at 2021-02-23 00:27:19UT with mlim=18.5.
There is only GSC2.3.2 outburst (1991y.) and 22m POSS limit in history, that gives >4m of current outburst amplitude.
Spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/082936.80-662225.5.png
MASTER OT J212145.40+332617.7 discovery - new optical source (no any data in VIZIER)
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 21h 21m 45.40s +33d 26m 17.7s on 2021-03-03.26976 UT.
The OT unfiltered magnitude is 16.8m (mlim=17.4).
The OT is seen in 2 images. There is no minor planet at this place.
We have reference image on 2016-07-12.14064 UT with unfiltered mlim= 19.8m.
There is no any sources in VIZIER database, => current outburst amplitude >5.2.
Deep photometry and spectral observations are required.
The discovery and reference images are available at:
http://master.sai.msu.ru/static/OT/212145.40332617.7.png
MASTER Global Robotic Net
