- This topic has 3 replies, 3 voices, and was last updated 2 years, 4 months ago by Dr Paul Leyland.
31 October 2020 at 10:21 am #574779Ernesto GuidoParticipant
Just few days after the discovery of the nova in M31 designated as AT2020xyv, we report our discovery of another possible nova in M31 on a 240-s R-band CCD frame taken on 2020 Oct. 30.91 UT with the 0.5 m f/8 Ritchey Chretien + CCD FLI PL4240 at MPC Code L07 (Osservatorio Salvatore di Giacomo, Agerola, ITALY), with magnitude R = 18.48 +- 0.10 at coordinates:
R.A. = 00 45 28.80, Decl.= +41 54 10.0 (equinox 2000.0; Gaia DR2).
This transient PNV J00452880+4154100 has been independently discovered by Darnley et al. as reported on ATel #14130 of 31 Oct 2020; 07:32 UT and identified by them as the eruption of recurrent Nova M31N 2008-12a.
Our discovery image and more info:
Ernesto Guido31 October 2020 at 10:42 am #583326Dr Paul LeylandParticipant
I was observing AF And and AE And last night at about 20201030T2300Z. The full moon was so bright that I had difficulty getting an adequate SNR for them at around V=17 so didn’t even try for the recurrent nova.
It might have been possible, I suppose, but certainly would not have been easy to get an unambiguous re-discovery and almost certainly not decent photometry.
Tonight promises to be clear.2 November 2020 at 10:02 pm #583330Nick JamesParticipant
This was my first opportunity to image the field. The sky was transparent but the Moon was bright and the wind was strong. Quite a lot of my subframes were badly trailed but this is what I managed to recover. The nova would be in the blue circles, comp stars are in the red circles. This is an unfiltered image referenced to Gaia DR2 G.4 November 2020 at 12:53 am #583334Dr Paul LeylandParticipant
Just finished a 2-hour set of exposures in Johnson-V. Nothing obvious in the quick-look stack and I don’t expect to be able to measure anything when the subs are processed properly. Best guess is <20.5 mag. but all will become clear soon enough.
A real pity conditions were not good enough here the previous couple of nights. Wind is still ferocious but at least the dust and clouds have gone.
Oh well, at least there is a nice GC in the field (at least one, perhaps more) and a whole bunch of supergiant stars resolved in the galaxy. An in-depth examination and comparison with sundry catalogues will doubtless turn up quite a few more interesting objects. I find it fascinating that we amateurs get about as good a view of M31 these days as Galileo did of our own galaxy.
- You must be logged in to reply to this topic.