Dictionary of Nomenclature of Celestial Objects

 I M31N (Not yet in Simbad)
 Write:<< YYYY-MMa>>
 N:  about 800
Object:Poss. Nova  (SIMBAD class: Nova)
  Note:Systematic designation of candidate novae in M 31.
The IAU Central Bureau for Astronomical Telegrams (CBAT) maintains a list of the M31 novae published in the CBETs: http://www.cbat.eps.harvard.edu/CBAT_M31.html

2007A&A...465..375P compiles novae from 1909-09 to 2005-10, and reports a search for supersoft X-ray sources (see also Henze et al. 2010A&A...523A..89H, 2011A&A...533A..52H).
More about this work can be found here: http://www.mpe.mpg.de/~m31novae/opt/m31/index.php

See also M32N, M33N, and NGC205N. in source:M 31 = NGC 224 Ref:=2007A&A...465..375P byPIETSCH W. , HABERL F., SALA G., STIELE H., HORNOCH K., RIFFESER A., FLIRI J., BENDER R., BUEHLER S., BURWITZ V., GREINER J., SEITZ S. Astron. Astrophys., 465, 375-392 (2007) X-ray monitoring of optical novae in M 31 from July 2004 to February 2005. oParagraph 4.2 CXOM31 J004238.2+411000 is a misprint for CXOM31 J04228.2+411000 oTable a1: <M31N YYYY-MMa> N=719. Table b2: <Hornoch NN> (Nos 1-41). Ref:=2008A&A...477...67H byHENZE M. , MEUSINGER H., PIETSCH W. Astron. Astrophys., 477, 67-78 (2008) A systematic search for novae in M31 on a large set of digitized archival Schmidt plates. oTables 6-9, col(1): numbering NN (Nos 1-84) is not used in SIMBAD. The novae are all designated as M31N YYYY-MMa. oTables 6-9, col(5): <M31N YYYY-MMa> N=6 added. <wnp(at)mpe.mpg.de> Max Planck Institut fuer extraterrestrische Physik (MPE) =E=Catalogue in electronic form as J/A+A/465/375 =E=Catalogue in electronic form as J/A+A/477/67 Originof the Acronym: p = Pre-registered to IAU Comm.5
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