J/A+A/465/375ivo://CDS.VizieR/J/A+A/465/375doi:10.26093/cds/vizier.34650375CDSPietsch W.Haberl F.Sala G.Stiele H.Hornoch K.Riffeser A.,Fliri J.Bender R.Buhler S.Burwitz V.Greiner J.Seitz S.2013-01-25T12:43:35Z2007-04-11T21:34:09ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frnovaex-ray-sourcesOptical novae have recently been identified as the major class of supersoft X-ray sources in M 31 based on ROSAT and early XMM-Newton and Chandra observations. This paper reports on a search for X-ray counterparts of optical novae in M 31 based on archival Chandra HRC-I and ACIS-I as well as XMM-Newton observations of the galaxy center region obtained from July 2004 to February 2005. We systematically determine X-ray brightness or upper limit for counterparts of all known optical novae with outbursts between November 2003 to the end of the X-ray coverage. In addition, we determine the X-ray brightnesses for counterparts of four novae with earlier outbursts. For comparison with the X-ray data we created a catalogue of optical novae in M 31 based on our own nova search programs and on all novae reported in the literature. We collected all known properties and named the novae consistently following the CBAT scheme. We detect eleven out of 34 novae within a year after the optical outburst in X-rays. While for eleven novae we detect the end of the supersoft source phase, seven novae are still bright more than 1200, 1600, 1950, 2650, 3100, 3370 and 3380d after outburst. One nova is detected to turn on 50d, another 200d after outburst. Three novae unexpectedly showed short X-ray outbursts starting within 50d after the optical outburst and lasting only two to three months. The X-ray emission of several of the novae can be characterized as supersoft from hardness ratios and/or X-ray spectra or by comparing HRC-I count rates with ACIS-I count rates or upper limits. The number of detected optical novae at supersoft X-rays is much higher than previously estimated (>30%). We use the X-ray light curves to estimate the burned masses of the White Dwarf and of the ejecta.2007A&A...465..375Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/465/375CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/208 : BVRI CCD photometry in the field of M 31 (Magnier+ 1992)J/A+A/451/835 : Properties of X-ray sources in M31/M33 (Hatzidimitriou+, 2006)J/A+A/445/423 : WeCAPP Survey. M31 variables (Fliri+, 2006)J/A+A/434/483 : An XMM-Newton survey of M 31 (Pietsch+, 2005)J/ApJ/609/735 : M31 Chandra X-ray sources (Williams+, 2004)J/ApJ/610/247 : M31 supersoft and quasi-soft X-ray sources (Di Stefano+, 2004)J/ApJ/577/738 : M31 Chandra X-ray point sources (Kong+, 2002)J/ApJ/578/114 : Chandra HRC source in M31 (Kaaret, 2002)J/A+AS/114/215 : New SNR candidates in M31 (Magnier+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/465/375https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/465/375http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/465/375https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/465/375https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/465/375http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/465/375GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/465/375/tablea1 (Catalogue of optical novae in M 31)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/465/375/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/465/375/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/465/375/tablea1?GETtext/xml+votable180.050000true10.643083340.95705560.0055555555555555566/2622-2623 2664 2666-2667 2704-2705 2708-2709 2752https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/465/375?format=asciiX-raydefaultJ/A+A/465/375/tablea1Catalogue of optical novae in M 31Rem? Remarksmeta.notecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintM31NNova "CBAT" name (G1)meta.id;meta.maincharprimaryRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.maine_RAJ2000Error on Right Ascensionarcsecstat.error;pos.eq.rafloate_DEJ2000Error on Declinationarcsecstat.error;pos.eq.decfloatr_PosPosition reference (1)meta.ref;pos.frameintJDJulian date of start of outburstdtime.epochdoubler_JDOutburst reference (1)meta.ref;pos.frameintIDout[a<] Outburst ID (2)meta.codecharr_IDout? Outburst ID reference (1)meta.ref;pos.frameintnullablemag? Observed magnitude of outburst maximummagphot.magfloatnullablen_mag? Filter of mag (3)instr.bandpasscharr_mag? Magnitude and filter reference (1)meta.refintnullableT2? Time from Maximum to 2 magnitudes belowdtime;arith.diffintnullableT2u? Time from Maximum to 2 magnitudes below (if range possible)dtime;arith.diffintnullabler_T2? T2 reference (1)meta.ref;pos.frameintnullablen_Onames[*] CDS remarks on alternatives names (4)meta.notecharOnames? Alternative namesmeta.idcharr_Onames? Additional references (1)meta.ref;pos.framecharr_Sp? Spectral confirmation references (1)meta.refcharr_Xray? X-ray references (1)meta.ref;pos.framecharKHindicates photometry in tableb2meta.ref.urlcharJ/A+A/465/375/refsReferences (tablea2 of the paper)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRefReference numbermeta.id;meta.mainintBibCodeBibCodemeta.bib.bibcodecharAutAuthor's namemeta.bib.authorcharComCommentsmeta.notecharSRefreference short codepos.framecharJ/A+A/465/375/tableb2Photometry of novae by Kamil HornochTelTelescopemeta.id;instr.telcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNo[1/41] Hornoch nova numbermeta.idintM31NM31 nova name following CBAT nomenclature (G1)meta.id;meta.maincharJDJulian Date of measurementdtime.epochdoublel_magLimit flag on magmeta.code.errorcharmagMagnitude of measurementmagphot.magfloatu_magUncertainty flag on magmeta.code.errorcharn_magFilter used for mag determinationinstr.bandpasscharObservObserverobs.observercharObsObservatorymeta.id;instr.obstychar