Vend55 = AT 2023veq: bright extragalactic nova in M31

We have discovered a bright nova candidate in M31 at around 18.6 magnitudes using 2x120s co-added images made om October 16.9870 UT with 0.32m telescope of the iTelescope.net network remotely at Nerpio, Spain with Luminance filter. AT 2023veq (Vend55) has significantly brightened in the 24 hours since it's discovery: by October 17.9082 UT the guest star has reached 17.7 magnitudes.

Update: Irene Salmaso etl. al made a spectrum of AT 2023veq (Vend55) at Asiago Observatory and classified this guest star as an extragalactic nova. By 18.6579UT this nova has brighened further to 17.1V, according to Jingyuan Zhao, Xingming Observatory, China.

The object was not visible on 10x120s unfiltered images made with 0.25m telescope of Tamás Tordai in Budapest, Hungary using a clear filter on 2023. October 15.8333 UT with limiting magnitude around 19.5C.


The discovery image of AT 2023veq (Vend55) - with reference images subtracted.

The discovery image of AT 2023veq (Vend55).


AT 2023veq (Vend55) was already clearly visible at around 18.9C magnitudes on unfiltered 18x120s set of images made by Tamás Tordai, Budapest, Hungary with his 0.25m Newtonian telescope at October 16.8183 UT.



AT 2023veq (Vend55) has significantly brightened in the 24 hours since it's discovery: by October 17.9082 UT the quest star has reached 17.7 magnitudes.

Update: Irene Salmaso etl. al made a spectrum of AT 2023veq (Vend55) at Asiago Observatory and classified this guest star as an extragalactic nova.



By 18.6579UT this nova has brighened further to 17.1V, according to Jingyuan Zhao, Xingming Observatory, China.


Megjegyzések

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Fényes szupernóva az M101-ben

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