Access to Astronomical Catalogues

← Click to display the menu
J/A+A/434/483       An XMM-Newton survey of M 31                (Pietsch+, 2005)

An XMM-Newton survey of M 31. Pietsch W., Freyberg M., Haberl F. <Astron. Astrophys. 434, 483 (2005)> =2005A&A...434..483P
ADC_Keywords: Galaxies, nearby ; X-ray sources Keywords: galaxies: individual: M 31 - X-rays: galaxies Abstract: In an analysis of XMM archival observations of the bright Local Group spiral galaxy M 31 we study the population of X-ray sources (X-ray binaries, supernova remnants) down to a 0.2-4.5keV luminosity of 4.4x1034erg/s. EPIC hardness ratios and optical and radio information are used to distinguish between different source classes. The survey detects 856 sources in an area of 1.24 square degrees. We correlate our sources with earlier M 31 X-ray catalogues and use information from optical, infra-red and radio wavelengths. As sources within M 31 we detect 21 supernova remnants (SNR) and 23 SNR candidates, 18 supersoft source (SSS) candidates, 7 X-ray binaries (XRBs) and 9 XRB candidates, as well as 27 globular cluster sources (GlC) and 10 GlC candidates, which most likely are low mass XRBs within the GlC. Comparison to earlier X-ray surveys reveal transients not detected with XMM-Newton, which add to the number of M 31 XRBs. There are 567 sources classified as hard, which may either be XRBs or Crab-like SNRs in M 31 or background AGN. The number of 44 SNRs and candidates more than doubles the X-ray-detected SNRs. 22 sources are new SNR candidates in M 31 based on X-ray selection criteria. Another SNR candidate may be the first plerion detected outside the Galaxy and the Magellanic Clouds. On the other hand, six sources are foreground stars and 90 foreground star candidates, one is a BL Lac-type active galactic nucleus (AGN) and 36 are AGN candidates, one source coincides with the Local Group galaxy M 32, one with a background galaxy cluster (GCl) and another is a GCl candidate, all sources not connected to M31. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 130 11 log of archival M 31 observation overlapping with the optical D25 ellipse (proposal numbers 010927, 011257 and 015158) table2.dat 725 856 X-ray source catalogue of the XMM-Newton EPIC M 31 observations refs.dat 80 42 References
See also: II/144 : Brightest stars in the field of M31 (Berkhuijsen+ 1988) II/145 : Brightest stars in a M31 foreground field (Berkhuijsen+, 1988) B/xmm : XMM-Newton Observation Log (XMM-Newton SOC, 2002) J/A+A/373/63 : M31 second ROSAT PSPC survey (Supper+, 2001) 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+A/426/11 : XMM-Newton survey of Local Group galaxy M 33 (Pietsch+ 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 11 A11 --- Field M31 field designation 13- 18 A6 --- M31ID Code for the field 20- 29 A10 --- ObsID ? Observation identification number 31- 40 A10 "YYYY-MM-DD" ObsDate Observation date 41- 43 A3 --- n_ObsDate Second day of observation 45 I1 h RAh ? Pointing direction right ascension, J2000 47- 48 I2 min RAm ? Pointing direction right ascension, J2000 50- 53 F4.1 s RAs ? Pointing direction right ascension, J2000 55 A1 --- DE- ? Pointing direction declination sign, J2000 56- 57 I2 deg DEd ? Pointing direction declination, J2000 59- 60 I2 arcmin DEm ? Pointing direction declination, J2000 62- 63 I2 arcsec DEs ? Pointing direction declination, J2000 65- 68 F4.1 arcmin ORA ? Offset in right ascension (1) 70- 73 F4.1 arcmin ODE ? Offset in declination (1) 75- 80 A6 --- PNFilter EPIC PN filter (2) 82- 86 F5.2 ks PNExpT ? PN exposition time after screening for high background 88- 92 F5.2 ks PNExpTC ? PN exposition time of colour image 94- 99 A6 --- M1Filter EPIC MOS1 filter (2) 101-105 F5.2 ks M1ExpT ? MOS1 exposition time after screening for high background 107-111 F5.2 ks M1ExpTC ? MOS1 exposition time of colour image 113-118 A6 --- M2Filter EPIC MOS2 filter (2) 120-124 F5.2 ks M2ExpT ? MOS2 exposition time after screening for high background 126-130 F5.2 ks M2ExpTC ? MOS2 exposition time of colour image
Note (1): Systematic offset in Ra and Dec in arcsec determined from correlations with 2MASS, USNO-B1 and catalogues. Note (2): All observations in full frame imaging mode.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- [PFH2005] Source Number 5- 10 A6 --- M31ID Code of the detection field in which the source was entered in the catalogue 11- 12 I2 h RAh Right Ascension J2000 (hours) 14- 15 I2 min RAm Right Ascension J2000 (minutes) 17- 21 F5.2 s RAs Right Ascension J2000 (seconds) 24 A1 --- DE- Declination J2000 (sign) 25- 26 I2 deg DEd Declination J2000 (degrees) 28- 29 I2 arcmin DEm Declination J2000 (minutes) 31- 34 F4.1 arcsec DEs Declination J2000 (seconds) 36- 40 F5.2 arcsec PosErr Positional error (1) 42- 49 E8.2 --- LH Source detection likelihood (combined EPIC) 51- 58 E8.2 ct/s CRate Combined EPIC count rate (2) 60- 66 E7.1 ct/s e_CRate Error in CRate 68- 75 E8.2 mW/m2 CFlux Combined EPIC flux in erg/cm2/s (2) 77- 83 E7.1 mW/m2 e_CFlux Error in CFlux 85- 89 F5.2 --- CHR1 ? Combined EPIC hardness ratio 1 (3) 91- 94 F4.2 --- e_CHR1 ? Error in CHR1 96-100 F5.2 --- CHR2 ? Combined EPIC hardness ratio 2 (3) 102-105 F4.2 --- e_CHR2 ? Error in CHR2 107-111 F5.2 --- CHR3 ? Combined EPIC hardness ratio 3 (3) 113-116 F4.2 --- e_CHR3 ? Error in CHR3 118-122 F5.2 --- CHR4 ? Combined EPIC hardness ratio 4 (3) 124-127 F4.2 --- e_CHR4 ? Error in CHR4 129-131 A3 --- VAL EPIC instruments contributing to source detection (4) 133-137 F5.1 ks PNExpo ? Exposure of EPIC pn instrument 139-146 E8.2 --- PNLH ? EPIC pn source detection likelihood 148-155 E8.2 ct/s PNRate ? EPIC pn count rate (2) 157-163 E7.1 ct/s e_PNRate ? Error in PNRate 165-172 E8.2 mW/m2 PNFlux ? EPIC pn flux in erg/cm^2^/s (2) 174-180 E7.1 mW/m2 e_PNFlux ? Error in PNFlux 182-186 F5.2 --- PNHR1 ? EPIC pn hardness ratio 1 (3) 188-191 F4.2 --- e_PNHR1 ? Error in PNHR1 193-197 F5.2 --- PNHR2 ? EPIC pn hardness ratio 2 (3) 199-202 F4.2 --- e_PNHR2 ? Error in PNHR2 204-208 F5.2 --- PNHR3 ? EPIC pn hardness ratio 3 (3) 210-213 F4.2 --- e_PNHR3 ? Error in PNHR3 215-219 F5.2 --- PNHR4 ? EPIC pn hardness ratio 4 (3) 221-224 F4.2 --- e_PNHR4 ? Error in PNHR4 226-230 F5.1 ks M1Expo ? Exposure of EPIC MOS1 instrument 232-239 E8.2 --- M1LH ? EPIC MOS1 source detection likelihood 241-248 E8.2 ct/s M1Rate ? EPIC MOS1 count rate (2) 250-256 E7.1 ct/s e_M1Rate ? Error in M1Rate 258-265 E8.2 mW/m2 M1Flux ? EPIC MOS1 flux in erg/cm^2^/s (2) 267-273 E7.1 mW/m2 e_M1Flux ? Error in M1Flux 275-279 F5.2 --- M1HR1 ? EPIC MOS1 hardness ratio 1 (3) 281-284 F4.2 --- e_M1HR1 ? Error in M1HR1 286-290 F5.2 --- M1HR2 ? EPIC MOS1 hardness ratio 2 (3) 292-295 F4.2 --- e_M1HR2 ? Error in M1HR2 297-301 F5.2 --- M1HR3 ? EPIC MOS1 hardness ratio 3 (3) 303-306 F4.2 --- e_M1HR3 ? Error in M1HR3 308-312 F5.2 --- M1HR4 ? EPIC MOS1 hardness ratio 4 (3) 314-317 F4.2 --- e_M1HR4 ? Error in M1HR4 319-323 F5.1 ks M2Expo ? Exposure of EPIC MOS2 instrument 325-332 E8.2 --- M2LH ? EPIC MOS2 source detection likelihood 334-341 E8.2 ct/s M2Rate ? EPIC MOS2 count rate (2) 343-349 E7.1 ct/s e_M2Rate ? Error in M2Rate 351-358 E8.2 mW/m2 M2Flux ? EPIC MOS2 flux in erg/cm^2^/s (2) 360-366 E7.1 mW/m2 e_M2Flux ? Error in M2Flux 368-372 F5.2 --- M2HR1 ? EPIC MOS2 hardness ratio 1 (3) 374-377 F4.2 --- e_M2HR1 ? Error in M2HR1 379-383 F5.2 --- M2HR2 ? EPIC MOS2 hardness ratio 2 (3) 385-388 F4.2 --- e_M2HR2 ? Error in M2HR2 390-394 F5.2 --- M2HR3 ? EPIC MOS2 hardness ratio 3 (3) 396-399 F4.2 --- e_M2HR3 ? Error in M2HR3 401-405 F5.2 --- M2HR4 ? EPIC MOS2 hardness ratio 4 (3) 407-410 F4.2 --- e_M2HR4 ? Error in M2HR4 412-566 A155 --- XID ? X-ray identification (5) 569-580 A12 --- USNOB1.0 ? Name of brightest USNO-B1.0 source within search area 582 I1 --- o_USNOB1.0 ? Number of USNO-B1.0 correlations 584-587 F4.1 arcsec USNOdist ? Distance of source USNO-B1.0 589-592 F4.1 mag USNOB2 ? B2 magnitude of source USNO-B1.0 594-597 F4.1 mag USNOR2 ? R2 magnitude of source USNO-B1.0 599-602 F4.1 mag USNOI ? I magnitude of source USNO-B1.0 604-607 F4.1 --- log(fX/fopt) ? Logarithm of X-ray-to-optical fluxes 609-623 A15 --- Class ? Classification of X-ray source (6) 625-724 A100 --- Remarks ? Additional remarks (7)
Note (1): 1 sigma statistical error, 0.5" to be added as 1 sigma systematic error Note (2): Count rate and flux in XID band (0.2-4.5keV) Note (3): HRi=(R(i+1)-R(i))/(R(i+1)+R(i)) where Ri are the count rates in the energy bands 1 to 5 and: 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 Note (4): First character for EPIC PN, second for MOS1, third for MOS2; character = T : source is in field of view of instrument F : otherwise Note (5): References in XID are coded as follows: TF91 = Trinchieri et al., 1991ApJ...382...82T CRP90 = Collura et al., 1990ApJ...356..119C PFJ93 = Primini et al., 1993ApJ...410..615P SHP97 = Supper et al., 1997A&A...317..328S CXOGMP Jhhmmss.s+ddmmss = Garcia et al., 2000ApJ...537L..23G SHL2001 = Supper et al., 2001A&A...373...63S OBT2001 = Osborne et al., 2001A&A...378..800O am-n = Kong et al., 2002ApJ...577..738K Di Stefano et al., 2004ApJ...610..247D Williams et al., 2004ApJ...609..735W DKG2002 = Di Stefano et al., 2002ApJ...570..618D Jhhmmss.s+ddmmss = Kaaret, 2002ApJ...578..114K TKP2004 = Trudolyubov et al., astro-ph/0401227 Note (6): Classifications used (see Table 5) are the following: fg Star = foreground star <fg Star> = foreground star candidate AGN = active galactic nucleus <AGN> = AGN candidate GAL = galaxy GCl = galaxy cluster <GCl> = galaxy cluster candidate SSS = supersoft source in M 31 <SSS> = supersoft source candidate in M 31 SNR = supernova remnant in M 31 <SNR> = supernova remnant candidate in M 31 GlC = source in globular cluster <GlC> = source in globular cluster candidate XRB = X-ray binary in M 31 <XRB> = X-ray binary candidate in M 31 <hard> = HR2-e_HR2>-0.2 or only HR3 and HR4 defined, and no other classification Note (7): The references are in refs.dat file
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Ref Reference code 9- 27 A19 --- BibCode BibCode 29- 48 A20 --- Aut Author's name 51- 80 A30 --- Com Comments
Acknowledgements: Wolfgang Pietsch <wnp(at)mpe.mpg.de>
(End) Wolfgang Pietsch [MPE, Germany] 17-Dec-2004
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