J/A+A/373/63 M31 second ROSAT PSPC survey (Supper+, 2001)
The second ROSAT PSPC survey of M31 and the complete ROSAT PSPC source list.
Supper R., Hasinger G., Lewin W.H.G., Magnier E.A., van Paradijs J.,
Pietsch W., Read A.M., Truemper J.
<Astron. Astrophys. 373, 63 (2001)>
=2001A&A...373...63S 2001A&A...373...63S
ADC_Keywords: Galaxies, nearby ; X-ray sources ; Surveys
Keywords: galaxies: fundamental parameters - galaxies: individual: M31 -
galaxies: spiral - X-rays: galaxies
Abstract:
This paper reports the results of the analysis of the second ROSAT
PSPC survey of M 31 performed in summer 1992. We compare our results
with those of the first survey, already published in Supper et al.
(1997, Cat. J/A+A/317/328). Within the ∼10.7deg2 field of view,
396 individual X-ray sources are detected in the second survey data,
of which 164 are new detections. When combined with the first survey,
this result in a total of 560 X-ray sources in the field of M 31.
Their (0.1keV-2.0keV) fluxes range from 7x10-15erg/cm2/s to
7.6x10-12erg/cm2/s, and of these 560 sources, 55 are tentatively
identified with foreground stars, 33 with globular clusters, 16 with
supernova remnants, and 10 with radio sources and galaxies (including
M 32). A comparison with the results of the Einstein M 31 survey
reveals 491 newly detected sources, 11 long term variable sources, and
7 possible transient sources. Comparing the two ROSAT surveys, we come
up with 34 long term variable sources and 8 transient candidates.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 102 396 All X-ray sources found with the ROSAT PSPC
during the second M31 survey
table6.dat 124 560 All X-ray sources coming out of a merge of the
source lists from the first and second M31 survey
table7.dat 63 69 Identification list of a correlation between the
ROSAT PSPC catalog and the X-ray source list of
TF91 (Trinchieri & Fabbiano, 1991ApJ...382...82T 1991ApJ...382...82T)
obtained from observations with the Einstein
satellite
table8.dat 68 114 Table of all optical and radio identifications
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See also:
II/144 : Brightest stars in the field of M31 (Berkhuijsen+ 1988)
IX/30 : Second ROSAT PSPC Catalog (ROSAT, 2000)
IX/13 : The 2E Catalogue (Harris+ 1994)
J/ApJS/118/177 : JHK photometry of M31 spiral arm (Kodaira+, 1998)
J/ApJ/504/113 : F175W and F275W photometry of M31 and M32 (Brown+, 1998)
J/ApJ/324/172 : M31 UBVR photometry (Hodge+, 1988)
J/A+A/278/36 : M 31 new OB associations (Magnier+ 1993)
J/A+A/317/328 : ROSAT PSPC survey of M 31 (Supper+ 1997)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_SII [*] *: Bulge source
2- 4 I3 --- SII Source number (second survey)
6 I1 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 14 F4.1 s RAs Right ascension (J2000)
16 A1 --- DE- Declination sign (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 24 I2 arcsec DEs Declination (J2000)
26- 27 I2 arcsec e_Pos 1 sigma position error
29 I1 --- Qual [1,4] Quality class (1=best, 4=worst)
31- 37 F7.1 --- LH Likelihood of detection
39 A1 --- l_RB Limit flag on RB
40- 45 F6.2 ct/ks RB Count rate 0.1-2.0keV
47- 50 F4.2 ct/ks e_RB ? 1 sigma error in RB
53 A1 --- l_RS Limit flag on RS
54- 58 F5.2 ct/ks RS Count rate 0.1-0.4keV
60- 63 F4.2 ct/ks e_RS ? 1 sigma error in RS
65 A1 --- l_RH Limit flag on RH
66- 71 F6.2 ct/ks RH Count rate 0.5-2.0keV
73- 76 F4.2 ct/ks e_RH ? 1 sigma error in RH
79 A1 --- l_RH1 Limit flag on RH1
80- 84 F5.2 ct/ks RH1 Count rate 0.5-0.9keV
86- 89 F4.2 ct/ks e_RH1 ? 1 sigma error in RH1
91 A1 --- l_RH2 Limit flag on RH2
92- 97 F6.2 ct/ks RH2 Count rate 0.9-2.0keV
99-102 F4.2 ct/ks e_RH2 ? 1 sigma error in RH2
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Class Note (1)
3- 17 A15 --- RXJ RXJ source number
18 A1 --- f_RXJ Source also correlated with Einstein (table 7)
20- 22 I3 --- SII ? Number in this second survey
24- 26 I3 --- [SHP97] ? Source number (first survey) (2)
28 A1 --- Marker [±] Marker of data identification (3)
30 I1 h RAh Right ascension (J2000)
32- 33 I2 min RAm Right ascension (J2000)
35- 38 F4.1 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 48 I2 arcsec DEs Declination (J2000)
50- 51 I2 arcsec e_Pos 1 sigma position error
53 I1 --- Qual Quality class (1=best, 4=worst)
55- 61 F7.1 --- LH Likelihood of detection
63 A1 --- l_RB Limit flag on RB
64- 69 F6.2 ct/ks RB Count rate 0.1-2.0 keV
71- 74 F4.2 ct/ks e_RB ? 1 sigma error in RB
76 A1 --- l_RS Limit flag on RS
77- 81 F5.2 ct/ks RS Count rate 0.1-0.4 keV
83- 86 F4.2 ct/ks e_RS ? 1 sigma error in RS
88 A1 --- l_RH Limit flag on RH
89- 94 F6.2 ct/ks RH Count rate 0.5-2.0 keV
96- 99 F4.2 ct/ks e_RH ? 1 sigma error in RH
101 A1 --- l_RH1 Limit flag on RH1
102-106 F5.2 ct/ks RH1 Count rate 0.5-0.9 keV
108-111 F4.2 ct/ks e_RH1 ? 1 sigma error in RH1
113 A1 --- l_RH2 Limit flag on RH2
114-119 F6.2 ct/ks RH2 Count rate 0.9-2.0 keV
121-124 F4.2 ct/ks e_RH2 ? 1 sigma error in RH2
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Note (1): Notes:
a: Foreground star
b: Galaxy
c: Supersoft source candidate
d: Globular cluster
e: SNR
*: Bulge source
~: Variable source (ref. Table2, 3 and footnote in Sect. 4.1.1)
+: Source with uncertain count rate
Note (2): SI number is listed if source was seen during the first survey
(number as listed in S97, Supper et al., Cat. J/A+A/317/328).
No number means source was *not* seen in the first survey
(only seen in the second).
Note (3): Markers are:
'+' = Source was seen in both surveys and listed data are
from the first survey.
'-' = Source was seen in both surveys and listed data are
from the second survey.
blank = Source was *only* seen in the first survey, listed data
are being from there.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1 A1 --- n_RXJ [*] Bulge source
2- 16 A15 --- RXJ RXJ source number
18- 22 F5.2 10-16W/m2 FR ROSAT Flux (1)
24- 27 F4.2 10-16W/m2 e_FR 1 sigma error in FR
29- 31 I3 --- E Einstein source number (2)
33- 37 F5.2 10-16W/m2 FE Einstein Flux (1)
39- 42 F4.2 10-16W/m2 e_FE 1 sigma error in FE
44- 47 F4.1 arcsec Dist Absolute distance between correlating
sources
49- 52 F4.2 --- DistRel Relative distance between correlating
sources (3)
54- 58 F5.2 --- FRat Flux ratio: FR / FE
60- 63 F4.2 --- e_FRat 1 sigma error in FRat
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Note (1): Model of TF91 (Trinchieri & Fabbiano, 1991ApJ...382...82T 1991ApJ...382...82T):
Thermal Bremsstrahlung kT=5keV, NH=7x1020/cm2
in the 0.2-4.0 keV energy band.
Note (2): According to the source list of TF91, Trinchieri & Fabbiano,
1991ApJ...382...82T 1991ApJ...382...82T.
Note (3): In sigma of the geometrical combined position error of each source.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- RXJ ROSAT designation
17- 27 A11 --- Class Object classification
29- 58 A30 --- Id Optical identifications (1)
60- 63 F4.1 arcsec Dist Distance between X-ray and optical sources
65- 68 F4.2 arcsec e_Dist rms uncertainty on Dist
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Note (1): Identifications:
BA87: Battistini et al., 1987A&AS...67..447B 1987A&AS...67..447B, Bol NNN
BA93: Battistini et al., 1993A&A...272...77B 1993A&A...272...77B, NBol NNN
BW93: Braun & Walterbos, 1993A&AS...98..327B 1993A&AS...98..327B, [WB92a] NNNA
DO80: D'Odorico et al., 1980A&AS...40...67D 1980A&AS...40...67D, DDB M 31 NN
HA94: Haiman et al., 1994A&A...286..725H 1994A&A...286..725H, Cat. II/208
MA94a: Magnier et al., 1994, A&AS, submitted
MA95: Magnier et al., 1995, Cat. J/A+AS/114/215, [MPV95] N-NNN
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Acknowledgements: Rodrigo Supper
(End) Rodrigo Supper [MPE], Patricia Bauer [CDS] 22-Jun-2001