SIMPLE = T / Standard FITS Format BITPIX = 8 / Character data NAXIS = 0 / No Image --- just extension(s) EXTEND = T / There are standard extensions BLOCKED = T / File may be blocked (obsolete, but who knows?) ORIGIN = 'CDS ' / File generated at CDS, Strasbourg, France (tofits, Version 3.0) e-mail: question@simbad.u-strasbg.fr COMMENT ARG='-w.fit -i M31_ReadMe' LONGSTRN= 'OGIP 1.0' / Long string convention (&/CONTINUE) may be usedDATE = '2012-04-24' / Written on 2012-04-24:09:41:01 (GMT) by: m31novae@ds07.mpe.mpg.de CDS-CAT = 'J/A+A/???/???' / Catalogue designation in CDS nomenclature COMMENT X-ray monitoring of optical novae in M~31 (Pietsch+, 2007) COMMENT Title: X-ray monitoring of optical novae in M 31 from July 2004 to February 2005 AUTHOR = 'Pietsch W., Haberl F., Sala G., Stiele H., Hornoch K., Riffeser A.,&'CONTINUE ' Fliri&' CONTINUE 'J., Bender R., B\"uhler S., Burwitz V., Greiner J., Seitz S.' REFERENC= 'Astron. Astrophys. ???, ??? (2007)' BIBCODE = '2007A&A...???..???P' / 19-digit SIMBAD/NED/ADS BibCode COMMENT ADC_Keywords: Galaxies: individual: M 31 -- novae, cataclysmic variables -- X-rays: galaxies -- X-rays: binaries -- Catalogs COMMENT Mission_Name: Chandra, XMM-Newton COMMENT Keywords: Galaxies: individual: M 31 -- novae, cataclysmic variables -- X-rays: galaxies -- X-rays: binaries -- Catalogs COMMENT Abstract: Optical 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, 5300, 3370 and 3380 d after outburst. One nova is detected to turn on 50 d, another 200 d after outburst. Three novae unexpectedly showed short X-ray outbursts starting within 50 d 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. . COMMENT File Summary: ----------------------------------------------------------------------- FileName Lrecl Records Explanations ----------------------------------------------------------------------- M31_ReadMe 80 . This file M31_table1.dat 340 906 Catalogue of optical novae in M 31 M31_table2.dat 100 632 References -----------------------------------------------------------------------COMMENT Unused Described file: M31_table1.dat COMMENT Unused Described file: M31_table2.dat COMMENT Acknowledgements: Wolfgang Pietsch =======================================================================HISTORY (End) Wolfgang Pietsch [MPE, Germany] 13-Dec-2006 END XTENSION= 'TABLE ' / Ascii Table Extension BITPIX = 8 / Character data NAXIS = 2 / Simple 2-D matrix NAXIS1 = 100 / Number of bytes per record NAXIS2 = 635 / Number of records PCOUNT = 0 / Get rid of random parameters GCOUNT = 1 / Only one group (isn't it obvious?) 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