Three OTs detected by MASTER-OAFA during Fermi trigger inspection

ATel #12275; A. Chasovnikov, V. Lipunov (Lomonosov MSU), D. V. Kornilov, E. Gorbovskoy, N. Tiurina, A. Kuznetsov, V. Vladimirov, P. Balanutsa, V. Chazov, D. Zimnukhov, D. Vlasenko (Lomonosov Moscow State University, SAI), R. Podesta, F. Podesta, C. Francile (OAFA), H. Levato (San Juan National University, Argentina), O. Gress, N. Budnev (API ISU), A. Gabovich (BSPU), V. Shumkov, T. Pogrosheva, A. Tlatov, V. Senik (KSS, Pulkovo observatory)
on 8 Dec 2018; 11:27 UT
Credential Certification: Nataly Tyurina (tiurina@sai.msu.ru)

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MASTER-OAFA robotic telescope (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L) located in Argentina (OAFA observatory of San Juan National University) was pointed to the possible long GRB181208.19 (trigger num 565936249) 17 sec after notice time and 123 sec after trigger time at 2018-12-08 04:32:47 UT.

MASTER OT J063515.49-624002.9 - No known CV.

MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net",Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 06h 35m 15.49s -62d 40m 02.9s on 2018-12-08.19993 UT. The OT unfiltered magnitude is 17.2m (mlim=19.0m).

The OT is seen in 2 images. There is no minor planet at this place.
There is 21 mag star in USNO-B1.0 catalogue with 0.5 arcsec offset.
We have 22 November 2018 image without object with 18.4 mag limit.
We have reference image without OT on 2018-02-19.09796 UT with magnitude limit in 'BLANK' filter 20.2m.

Cheking of the robots OT candidates is continuation.

The discovery and reference images are available at:

http://master.sai.msu.ru/static/OT/063515.49-624002.9.png

Spectral observations are required.

MASTER OT J231531.76-304848.3 - 13 mag Known Dwarf Nova in Flare!

MASTER-IAC auto-detection system discovered OT source at (RA, Dec) = 23h 15m 31.76s -30d 48m 48.3s on 2018-12-07.79828 UT. The OT unfiltered magnitude is 13.3m (limit 18.9m).

The OT is seen in 16 images. There is no minor planet at this place.

We have reference image without OT on 2018-10-01.03255 UT with unfiltered magnitude limit 19.5m.

The discovery and reference images are available at:

http://master.sai.msu.ru/static/OT/231531.76-304848.3.png

MASTER OT J065447.10-593010.8 discovery - Possible SN in PGC370.

MASTER-OAFA auto-detection system ( Lipunov et al., "MASTER Global Robotic Net", Advances in Astronomy, 2010, 30L ) discovered OT source at (RA, Dec) = 06h 54m 47.10s -59d 30m 10.8s on 2018-12-08.27810 UT. The OT unfiltered magnitude is 16.5m (mlim=18.3m).

The OT is seen in 4 images. There is no minor planet at this place.

We have reference image without OT on 2018-02-19.08706 UT with magnitude limit in 'BLANK' filter 20.1m.

The OT is inside PGC370 galaxy with 3.8E 5N offset.

Spectral observations are required. List of Optical Transients discovered by MASTER

The discovery and reference images are available at:

http://master.sai.msu.ru/static/OT/065447.10-593010.8.png

The covered map is available at http://master.sai.msu.ru/static/png/GRB181208.19/FERMI//224854545.png.1.png

The covered map is available at http://master.sai.msu.ru/static/png/GRB181208.19/FERMI//224854545.png.3.png

The 5-sigma upper limit has been about 18.3mag

The galactic latitude b = -24 deg., longitude l = 277 deg. The observations made on zenit distance = 39 deg.The moon ( 1 % bright part) below the horizon (The altitude of the Moon is -37 deg. ). The sun altitude is -35.5 deg. The object can be observed till sunrise at 2018-12-08 09:24:03

Spectral observations are required.

Global MASTER Robotic Net