Access to Astronomical Catalogues

← Click to display the menu
J/A+A/448/1247      XMM-Newton survey of M33                 (Misanovic+, 2006)

XMM-Newton survey of the Local Group galaxy M33. Variability of the detected sources. Misanovic Z., Pietsch W., Haberl F., Ehle M., Hatzidimitriou D., Trinchieri G <Astron. Astrophys. 448, 1247 (2006)> =2006A&A...448.1247M
ADC_Keywords: Galaxies, nearby ; X-ray sources Keywords: Galaxies: individual: M33 - X-rays: galaxies ; X-rays: binaries Abstract: We present an analysis of the individual observations of a deep XMM-Newton survey of the Local Group spiral galaxy M33. We detected a total of 350 sources with fluxes (in the 0.2-4.5keV energy band) in the range 6.7x10-16-1.5x10-11erg/s. This comprehensive study considers flux variability, spectral characteristics, and classification of the detected objects. Thirty-nine objects in our catalogue are new sources, while 311 were already detected in a previous analysis of most of the same data using combined images. We present improved positions of these sources and the X-ray parameters of each source in each individual observation that covers the source. We then used these parameters to systematically search for flux variability on time scales of hours to months or years. The long-term light-curves were generated for the 61 sources showing a significant variability of the (0.2-4.5)keV flux, by a factor of 1.2 to 144. The detected variability was then used to classify 8 new X-ray binary candidates in M33. Together with the hardness ratio method and cross-correlation with optical, infrared, and radio data, we also classify or confirm previous classification of 25 supernova remnants and candidates, 2 X-ray binaries, and 11 super-soft source candidates (7 of which are new SSS candidates). In addition, we classify 13 active galactic nuclei and background galaxies, 6 stars, and 23 foreground star candidates in the direction of M33. Further 206 objects are classified as 'hard', approximately half of which are sources intrinsic to M33. The relative contribution of the classified XRB and SSS in M33 is now comparable to M31. The luminosity distribution of SNRs in both spiral galaxies is almost the same, although the number of the detected SNRs in M33 remains much higher. Description: We present analysis of all 24 archival raster XMM-Newton (Jansen et al., 2001A&A...365L...1J) observations of M33. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table4.dat 251 350 X-ray variability of the sources detected in the XMM-Newton EPIC M33 raster observations table5.dat 374 2658 X-ray source catalogue of the individual XMM-Newton EPIC M33 raster observations
See also: J/A+A/373/438 : The X-ray view of M33 after ROSAT (Haberl+ 2001) J/A+A/426/11 : XMM-Newton survey of the Local Group galaxy M33 (Pietsch+ 2004) Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 3 I3 --- SRC Source Number 5- 7 I3 --- [PMH2004] Source Number Pietsch et al., 2004, Cat. J/A+A/426/11 9 I1 h RAh Right Ascension (J2000) 10 A1 --- --- [:] 11- 12 I2 min RAm Right Ascension (J2000) 13 A1 --- --- [:] 14- 18 F5.2 s RAs Right Ascension (J2000) 20 A1 --- DE- Declination sign (J2000) 21- 22 I2 deg DEd Declination (J2000) 23 A1 --- --- [:] 24- 25 I2 arcmin DEm Declination (J2000) 26 A1 --- --- [:] 27- 30 F4.1 arcsec DEs Declination (J2000) 32- 36 F5.2 arcsec e_Pos Positional error 38- 45 E8.3 mW/m2 Fmax Maximum EPIC flux in erg/cm2/s (2) 47- 53 E7.1 mW/m2 e_Fmax Error in Fmax 55- 60 F6.2 --- Var ?=* Variability factor (3) 62- 67 F6.2 --- SigVar ?=* Variability significance (4) 69- 70 I2 --- VarFlag Variability flag (5) 72-109 A38 --- XID X-ray identifications (6) 111-122 A12 --- USNO_B1 USNO_B1 cross-correlation (I/284) 124-127 F4.1 --- log(FX/Fopt) ?=* Logarithm of FX/Fopt 129-145 A17 --- 2MASS 2MASS cross-correlation (II/246) 147-151 F5.2 mag Jmag ?=* 2MASS J magnitude 153-157 F5.2 mag Hmag ?=* 2MASS H magnitude 159-163 F5.2 mag Kmag ?=* 2MASS K magnitude 165-178 A14 --- NVSS NVSS cross-correlation (VIII/65) 180-184 F5.2 mJy S1.4GHz ?=* NVSS 1.4 GHz flux 186-200 A15 --- XType Classification of X-ray source (7) 202-251 A50 --- Comm Additional comments (8)
Note (2): Maximum flux in XID band (0.2-4.5keV) Note (3): Var=Fmax/Fmin where Fmax and Fmin are the maximum and minimum XID flux. If source is not detected at the minimum then Fmin is determined as 3sigma XID flux upper limit. Note (4): SigVar=(Fmax-Fmin)/sqr(eFmax*eFmax+eFmin*eFmin) where e_Fmax and e_Fmin are errors in Fmax and Fmin. Note (5): VarFlag as follows: 1 = Fmin is a non-detection 0 = otherwise Note (6): References in XID as follows: X-n = Long et al., 1981ApJ...246L..61L; Trinchieri et al., 1988ApJ...329.1037T SBn = Schulman & Bregman, 1995ApJ...441..568S LCBn = Long et al., 1996ApJ...466..750L DCL97= Dubus et al., 1997ApJ...490L..47D DCL99= Dubus et al., 1999MNRAS.302..731D HPn = Haberl & Pietsch, 2001A&A...373..438H Note (7): Classifications used (see J/A+A/426/11 (Pietsch+ 2004)), as follows: fgStar = foreground star <fgStar> = foreground star candidate AGN = active galactic nucleus <AGN> = AGN candidate GAL = galaxy <GAL> = galaxy candidate SSS = supersoft source in M33 <SSS> = supersoft source candidate in M33 SNR = supernova remnant in M 33 <SNR> = supernova remnant candidate in M33 XRB = X-ray binary in M 33 <hard> = HR2-e_HR2>-0.2 or only HR3 and HR4 defined, and no other classification Note (8): References for the other identifications as follows: SIM = SIMBAD Database NED = NASA Extragalactic Database NVSS = Condon et al., 1998AJ....115.1693C CS82 = Christian & Schommer, 1982ApJ...253L..13C [MC83]25 = Massey & Conti, 1983ApJ...273..576M IFM* = Ivanov et al., 1993ApJS...89...85I GKLn = Gordon et al., 1998ApJS..117...89G GDKn = Gordon et al., 1999ApJS..120..247G TYC2293-810-1 = Hog et al., 1998A&A...335L..65H IV74 = Israel & van der Kruit, 1974A&A....32..363I VBW78 = von Kap-Herr et al., 1978A&A....62...51V M98 = Massey, 1998ApJ...501..153M MCM2001 = Magrini et al., 2001A&A...367..498M MBH96 = Massey et al., 1996ApJ...469..629M PMM2004 = Pietsch et al., 2004A&A...413..879P GM94 = Giovagnoli & Mould, 1994PASP..106..376G FS95b = Fabrika et al., 1995Ap&SS.226..229F FSZ = Fabrika et al., 1997BSAO...43..133F D33 = Macri et al., 2001AJ....121..870M; Mochejska et al., 2001AJ....121.2032M RW93 = Regan & Wilson, 1993AJ....105..499R VHK = Hubble, 1926ApJ....63..236H CGC97 = Crampton et al., 1997AJ....114.2353C BCLMP = Boulesteix et al., 1974A&A....37...33B
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 3 I3 --- SRC Source Number 5- 11 A7 --- Obs Observation identification 13- 20 E8.3 --- DetML Source detection likelihood (combined EPIC) 22- 29 E8.3 ct/s XIDRate Combined EPIC count rate (1) 31- 37 E7.2 ct/s e_XIDRate Error in XID_RATE 39- 46 E8.3 mW/m2 XIDFlux Combined EPIC flux in erg/cm2/s (1) 48- 54 E7.2 mW/m2 e_XIDFlux Error in XID_FLUX 56- 60 F5.2 --- HR1 ?=* Combined EPIC hardness ratio 1 (2) 62- 65 F4.2 --- e_HR1 ?=* Error in HR1 67- 71 F5.2 --- HR2 ?=* Combined EPIC hardness ratio 2 (2) 73- 76 F4.2 --- e_HR2 ?=* Error in HR2 78- 82 F5.2 --- HR3 ?=* Combined EPIC hardness ratio 3 (2) 84- 87 F4.2 --- e_HR3 ?=* Error in HR3 89- 93 F5.2 --- HR4 ?=* Combined EPIC hardness ratio 4 (2) 95- 98 F4.2 --- e_HR4 ?=* Error in HR4 100-103 F4.1 ks pnExpMap ?=* Exposure of EPIC pn instrument 105-112 E8.3 --- pnDetML ?=* EPIC pn source detection likelihood 114-121 E8.3 ct/s pnXIDRate ?=* EPIC pn count rate (1) 123-129 E7.2 ct/s e_pnXIDRate ?=* Error in pnXIDRATE 131-138 E8.3 mW/m2 pnXIDFlux ?=* EPIC pn flux in erg/cm2/s (1) 140-146 E7.2 mW/m2 e_pnXIDFlux ?=* Error in pnXIDFLUX 148-152 F5.2 --- pnHR1 ?=* EPIC pn hardness ratio 1 (2) 154-157 F4.2 --- e_pnHR1 ?=* Error in pn_HR1 159-163 F5.2 --- pnHR2 ?=* EPIC pn hardness ratio 2 (2) 165-168 F4.2 --- e_pnHR2 ?=* Error in pn_HR2 170-174 F5.2 --- pnHR3 ?=* EPIC pn hardness ratio 3 (2) 176-179 F4.2 --- e_pnHR3 ?=* Error in pn_HR3 181-185 F5.2 --- pnHR4 ?=* EPIC pn hardness ratio 4 (2) 187-190 F4.2 --- e_pnHR4 ?=* Error in pn_HR4 192-195 F4.1 ks m1ExpMap ?=* Exposure of EPIC MOS1 instrument 197-204 E8.3 --- m1DetML ?=* EPIC MOS1 source detection likelihood 206-213 E8.3 ct/s m1XIDRate ?=* EPIC MOS1 count rate (1) 215-221 E7.2 ct/s e_m1XIDRate ?=* Error in m1XIDRATE 223-230 E8.3 mW/m2 m1XIDFlux ?=* EPIC MOS1 flux in erg/cm2/s (1) 232-238 E7.2 mW/m2 e_m1XIDFlux ?=* Error in m1XIDFLUX 240-244 F5.2 --- m1HR1 ?=* EPIC MOS1 hardness ratio 1 (2) 246-249 F4.2 --- e_m1HR1 ?=* Error in m1HR1 251-255 F5.2 --- m1HR2 ?=* EPIC MOS1 hardness ratio 2 (2) 257-260 F4.2 --- e_m1HR2 ?=* Error in m1HR2 262-266 F5.2 --- m1HR3 ?=* EPIC MOS1 hardness ratio 3 (2) 268-271 F4.2 --- e_m1HR3 ?=* Error in m1HR3 273-277 F5.2 --- m1HR4 ?=* EPIC MOS1 hardness ratio 4 (2) 279-282 F4.2 --- e_m1HR4 ?=* Error in m1HR4 284-287 F4.1 ks m2ExpMap ?=* Exposure of EPIC MOS2 instrument 289-296 E8.3 --- m2DetML ?=* EPIC MOS2 source detection likelihood 298-305 E8.3 ct/s m2XIDRate ?=* EPIC MOS2 count rate (1) 307-313 E7.2 ct/s e_m2XIDRate ?=* Error in m2XIDRATE 315-322 E8.3 mW/m2 m2XIDFlux ?=* EPIC MOS2 flux in erg/cm2/s (1) 324-330 E7.2 mW/m2 e_m2XIDFlux ?=* Error in m2XIDFLUX 332-336 F5.2 --- m2HR1 ?=* EPIC MOS2 hardness ratio 1 (2) 338-341 F4.2 --- e_m2HR1 ?=* Error in m2HR1 343-347 F5.2 --- m2HR2 ?=* EPIC MOS2 hardness ratio 2 (2) 349-352 F4.2 --- e_m2HR2 ?=* Error in m2HR2 354-358 F5.2 --- m2HR3 ?=* EPIC MOS2 hardness ratio 3 (2) 360-363 F4.2 --- e_m2HR3 ?=* Error in m2HR3 365-369 F5.2 --- m2HR4 ?=* EPIC MOS2 hardness ratio 4 (2) 371-374 F4.2 --- e_m2HR4 ?=* Error in m2HR4
Note (1): Count rate and flux in XID band (0.2-4.5keV) Note (2): HRi=(R(i+1)-R(i))/(R(i+1)+R(i)) where Ri are the count rates in the energy bands 1 to 5: band 1 = 0.2-0.5keV, band 2 = 0.5-1.0keV, band 3 = 1.0-2.0keV, band 4 = 2.0-4.5keV, band 5 = 4.5-12keV
Acknowledgements: Zdenka Misanovic, zdenka(at)mpe.mpg.de
(End) Zdenka Misanovic [MPE, Germany], Patricia Vannier [CDS] 25-Nov-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact