<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Henze, Martin</style></author><author><style face="normal" font="default" size="100%">Pietsch, Wolfgang</style></author><author><style face="normal" font="default" size="100%">Haberl, Frank</style></author><author><style face="normal" font="default" size="100%">Hernanz, Margarita</style></author><author><style face="normal" font="default" size="100%">Sala, Gloria</style></author><author><style face="normal" font="default" size="100%">Della Valle, Massimo</style></author><author><style face="normal" font="default" size="100%">Hatzidimitriou, Despina</style></author><author><style face="normal" font="default" size="100%">Rau, Arne</style></author><author><style face="normal" font="default" size="100%">Hartmann, Dieter H.</style></author><author><style face="normal" font="default" size="100%">Burwitz, Vadim</style></author><author><style face="normal" font="default" size="100%">Greiner, Jochen</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Classical Novae as Supersoft X-ray Sources in the Andromeda Galaxy</style></title><short-title><style face="normal" font="default" size="100%">Binary Paths to Type Ia Supernovae Explosions</style></short-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CATACLYSMIC VARIABLES</style></keyword><keyword><style  face="normal" font="default" size="100%">galaxies: individual (M 31)</style></keyword><keyword><style  face="normal" font="default" size="100%">Novae</style></keyword><keyword><style  face="normal" font="default" size="100%">X-rays: binaries</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2013/01/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://ui.adsabs.harvard.edu/abs/2013IAUS..281..105H</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">281</style></volume><pages><style face="normal" font="default" size="100%">105 - 112</style></pages><isbn><style face="normal" font="default" size="100%">1743-9221</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">We review the first results of a dedicated, on-going monitoring project for supersoft X-ray source (SSS) states of classical novae (CNe) in the central region of the Andromeda galaxy (M 31). So far, during three high-cadence observation campaigns with the X-ray telescopes XMM-Newton and Chandra from 2006 until 2009 we detected 21 CNe, only four of which were seen in X-rays before. This increased the total number of known CNe with X-ray counterparts in M 31 to 60, which is significantly larger than for any other galaxy, including the Milky Way. We compiled a catalog of X-ray and optical properties for these 60 sources which allowed us to perform source statistics and population studies of CNe with SSS state in M 31 for the first time. Here we review the results of this analysis: (i) several correlations between X-ray and optical parameters, (ii) an analysis of the intrinsic fraction of CNe with SSS state, and (iii) the first nova population study in X-rays. Our first results are promising, however a continuing monitoring of the unique target M 31 is strongly needed to extend this valuable data base and to refine the early statements and predictions.</style></abstract></record></records></xml>