MASTER: PSNe, CV, XMM-SSC source outbursts and brown dwarf optical flare

ATel #15015; K. Zhirkov, Ya. Kechin, V. Lipunov, E. Gorbovskoy, P. Balanutsa, A. Kuznetsov, O. Gress, G. Antipov, D. Vlasenko, N. Tiurina, D. Zimnukhov, V. Senik, V. Topolev, A. Chasovnikov, E. Minkina, V. Grinshpun, D. Cheryasov, Ya. Kechin, T. Pogrosheva, V. Shumkov (Lomonosov MSU), R. Rebolo, M. Serra(IAC), D. A. H. Buckley (SAAO), N. M. Budnev (ISU, API), R. Podesta, C. Lopez, F. Podesta, C. Francile (OAFA), A. Tlatov, D. Dormidontov (KSS, Pulkovo observatory), A. Gabovich, V. Yurkov (BSPU)
on 4 Nov 2021; 04:31 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER OT J091112.50+173344.0 detection - XMM-SSC source optical outburst
AT2021acet
MASTER-IAC auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L )
discovered OT source at (RA, Dec) = 09h 11m 12.50s +17d 33m 44.0s on 2021-10-26.16918 UT with unfiltered m= 15.8m (mlim=18.8).
OT is seen in 9 images, also as m=15.8 at 2021-11-02 06:34:04UT.
Reference image:2019-01-12.13286 UT with unfilt.mlim=20.7m.
The discovery and reference images: http://master.sai.msu.ru/static/OT/091112.50173344.0.png

MASTER OT J232742.14-403137.2 detection - possibly UVCet-type flare
MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 23h 27m 42.14s -40d 31m 37.2s on 2021-10-26.12102 UT with unfiltered m=18.4m (mlim=19.6).
OT is seen in 2 images. There is no OT at 2021-10-28 03:05:08UT with mlim=19.6.Previous flare found by ATLAS in 2020.
We have reference image at 2020-09-17.17493 UT with mlim=20.0m.
The discovery and reference: http://master.sai.msu.ru/static/OT/232742.14-403137.2.png

MASTER OT J103337.12-432158.1 detection - dwarf nova outburst
MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 10h 33m 37.12s -43d 21m 58.1s on 2021-10-31.04648 UT with unfilt.m=16.7m(mlim=19.0).
OT is seen in 3 images.
We have reference image on 2015-02-07.04796 UT with mlim=18.9m.
The discovery and reference: http://master.sai.msu.ru/static/OT/103337.12-432158.1.png

MASTER OT J095748.63+072810.4 discovery - dwarf nova outburst, ampl>3.6m
AT2021acik
MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 09h 57m 48.63s +07d 28m 10.4s on 2021-10-27.18875UT with unfilt.m=16.3m (mlim=18.6).
The OT is seen in 12 images.
We have reference images on 2020-01-27.15811UT with unfilt.mlim=19.9m, at 2021-10-23 05:12:53UT with mlim=18.5.
The discovery and reference :
http://master.sai.msu.ru/static/OT/095748.63072810.4.png

MASTER OT J022912.94-603526.3 discovery - PSN in 15.8"E,34.9"N from the center of PGC175158
AT2021acga MASTER-SAAO auto-detection system discovered OT source at (RA, Dec) = 02h 29m 12.94s -60d 35m 26.3s on 2021-10-26.92367 UT with unfiltered m=18.8m (mlim=20.4).
The OT is seen in 6 images, also at 2021-11-04 02:32:22 with unfilt. m_OT~19.2.
We have reference image on 2015-02-21.86620 UT with mlim=21.2m, at 2021-09-22 00:48:03UT with m_lim=19.3,
http://master.sai.msu.ru/static/OT/022912.94-603526.3.png

MASTER OT J022249.51-594639.6 discovery - brown dwarf flare
MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 02h 22m 49.51s -59d 46m 39.6s on 2021-10-19.19821 UT with unfiltered m= 15.0m (mlim=18.7).
The OT is seen in MASTER-OAFA images (14.34+-0.01; 15.00+-0.02) at 19th of October , and at 2021-10-26 22:10:05UT in MASTER-SAAO with m_OT~19.2m. There is no minor planet at this place.
We have reference image on 2018-02-18.12096 UT with unfilt.mlim=20.3m.
Images: http://master.sai.msu.ru/static/OT/022249.51-594639.6_1.png

MASTER OT J004711.21+084427.4 discovery - short OT in 4"E,4.3"S from the center of PGC1352843
MASTER-OAFA auto-detection system discovered OT source at (RA, Dec) = 00h 47m 11.21s +08d 44m 27.4s on 2021-10-24.07361 UTwith unfiltered m=17.5m (mlim=18.7).
The OT is seen in 2 images.
Reference image:2021-08-13.17457 UT with unfilt.mlim=20.1m.
Images:
http://master.sai.msu.ru/static/OT/004711.21084427.4.png

For all OTs there is no minor planets at this place and deep photometry and spectral observations are required.

MASTER Global Robotic Net