J/A+A/???/??? X-ray monitoring of optical novae in M~31 (Pietsch+, 2007) ================================================================================ X-ray monitoring of optical novae in M 31 from July 2004 to February 2005 Pietsch W., Haberl F., Sala G., Stiele H., Hornoch K., Riffeser A., Fliri J., Bender R., B\"uhler S., Burwitz V., Greiner J., Seitz S. =2007A&A...???..???P (SIMBAD/NED BibCode) ================================================================================ ADC_Keywords: Galaxies: individual: M 31 -- novae, cataclysmic variables -- X-rays: galaxies -- X-rays: binaries -- Catalogs Mission_Name: Chandra, XMM-Newton Keywords: Galaxies: individual: M 31 -- novae, cataclysmic variables -- X-rays: galaxies -- X-rays: binaries -- Catalogs 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. . File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- M31_ReadMe 80 . This file M31_table1.dat 340 1257 Catalogue of optical novae in M 31 M31_table2.dat 100 1672 References -------------------------------------------------------------------------------- Byte-by-byte Description of file: M31_table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 A13 --- name Nova "CBAT" name 17- 17 A1 --- nonova No nova flag (4) 19- 20 I2 h RAh Right Ascension J2000 (hours) 22- 23 I2 min RAm Right Ascension J2000 (minutes) 25- 29 F5.2 s RAs Right Ascension J2000 (seconds) 31- 31 A1 --- DE_ Declination J2000 (sign) 32- 33 I2 deg DEd Declination J2000 (degrees) 35- 36 I2 arcmin DEm Declination J2000 (minutes) 38- 41 F4.1 arcsec DEs Declination J2000 (seconds) 43- 45 F3.1 arcsec RAErr RA error 47- 49 F3.1 arcsec DecErr Dec error 51- 54 I4 --- Pos_ref Position reference (1) 56- 65 D10.2 JD JD Julian date of start of outburst 67- 70 I4 --- JD_ref Outburst reference (1) 72- 72 A1 --- ID_out Outburst ID (2) 74- 77 I4 --- ID_ref Outburst ID reference (1) 79- 82 F4.1 mag MAG Observed magnitude of outburst maximum 84- 85 A2 --- Filt Filter of MAG (3) 87- 90 I4 --- M_ref Magnitude and filter reference (1) 92- 94 I3 days T2_1 Time from Maximum to 2 magnitues below 96- 98 I3 days T2_2 Time from Maximum to 2 magnitues below (if range possible) 100-103 I4 --- T2_ref T2 reference (1) 105-144 A40 --- anames alternative names 146-149 I4 --- a_ref1 additional reference 1 (1) 151-154 I4 --- a_ref2 additional reference 2 (1) 156-159 I4 --- a_ref3 additional reference 3 (1) 161-164 I4 --- a_ref4 additional reference 4 (1) 166-169 I4 --- a_ref5 additional reference 5 (1) 171-174 I4 --- s_ref1 spectral confirmation reference 1 (1) 176-179 I4 --- s_ref2 spectral confirmation reference 2 (1) 181-184 I4 --- s_ref3 spectral confirmation reference 3 (1) 186-189 I4 --- x_ref1 X-ray reference 1 (1) 191-194 I4 --- x_ref2 X-ray reference 2 (1) 196-199 I4 --- x_ref3 X-ray reference 3 (1) 201-340 A140 --- com Comments -------------------------------------------------------------------------------- Note (1): see table2 (2): a indicates well defined start of outburst < outburst start before else badly defined (3): pg photogaphic w white light Ha broad Halpha r,R,U,V,B broad band colour (4): N indicates not a nova in M31 Byte-by-byte Description of file: M31_table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- nrev Reference number 6- 90 A85 --- arev reference 91-100 A10 --- asrev reference short code -------------------------------------------------------------------------------- Acknowledgements: Wolfgang Pietsch ================================================================================ (End) Wolfgang Pietsch [MPE, Germany] 13-Dec-2006