Vend75: a rapid nova or dwarf nova in M31
Itagaki-san discovered a 18.1 magnitudes nova candidate (TCP J00404022+4122433) in M31 on 21. november 21.
Two days ago, on. 22th November morning I also detected it near 16th magnitudes on my 7x120scolor images made with the 0.28m RASA telescope at UDRO.
This transient reached peak brighness near 15.84V at Nov. 22.4177UT accodring to K. Yoshimoto. However this transient was hardly visible on my recent 8x120s images made with the 0.28m RASA at UDRO this morning (it was around 17.5 magnitudes).
The rapid fading and the blue color on my images suggest that this is
either a 'precursor' outburst of a dwarf nova or a rapid classical nova.
Follow-up photometry and spectroscopy is urgently needed!


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