J/A+A/428/383 XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)
Exploring the X-ray sky with the XMM-Newton Bright Serendipitous Survey.
Della Ceca R., Maccacaro T., Caccianiga A., Severgnini P., Braito V.,
Barcons X., Carrera F.J., Watson M.G., Tedds J.A., Brunner H., Lehmann I.,
Page M.J., Lamer G., Schwope A.
<Astron. Astrophys., 428, 383-399 (2004)>
=2004A&A...428..383D 2004A&A...428..383D
ADC_Keywords: X-ray sources ; Surveys
Keywords: X-rays: diffuse background - surveys - X-rays: active galaxies
Abstract:
We present here "The XMM-Newton Bright Serendipitous Survey",
composed of two flux-limited samples: the XMM-Newton Bright Source
Sample (BSS, hereafter) and the XMM-Newton "Hard" Bright Source Sample
(HBSS, hereafter) having a flux limit of fX∼7x10-14erg/cm2/s in
the 0.5-4.5keV and 4.5-7.5keV energy band, respectively. After
discussing the main goals of this project and the survey strategy, we
present the basic data on a complete sample of 400 X-ray sources (389
of them belong to the BSS, 67 to the HBSS with 56 X-ray sources in
common) derived from the analysis of 237 suitable XMM-Newton fields
(211 for the HBSS). At the flux limit of the survey we cover a survey
area of 28.10 (25.17 for the HBSS) sq. deg. The extragalactic
number-flux relationships (in the 0.5-4.5keV and in the 4.5-7.5keV
energy bands) are in good agreement with previous and new results
making us confident about the correctness of data selection and
analysis.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 43 13 MOS2 count rate to flux conversion factors
table2.dat 68 237 Basic information on the XMM-Newton MOS2 fields
used for the sample selection
table3.dat 108 389 Basic information on the XMM-Newton BSS sample
table4.dat 108 67 Basic information on the XMM-Newton HBSS sample
tableb1.dat 45 45 Basic information on the sources excluded from
the sample(s) since their "Illumination Factor"
is less than 0.8
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)
IX/37 : XMM-Newton Serendipitous Source Catalogue (1XMM) (XMM-SSC, 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 F4.1 --- Sp-Index Energy spectral index
6- 10 F5.2 --- HR2 Corresponding hardness ratio
HR2 (G2)
12- 16 F5.2 10-15W/m2 F(0.5-4.5keV)Thin Flux in the 0.5-4.5keV energy band
for thin filter (1)
18- 22 F5.2 10-15W/m2 F(0.5-4.5keV)Medium Flux in the 0.5-4.5keV energy band
for medium filter (1)
24- 28 F5.2 10-15W/m2 F(0.5-4.5keV)Thick Flux in the 0.5-4.5keV energy band
for thick filter (1)
30- 33 F4.2 10-14W/m2 F(4.5-7.5keV)Thin Flux in the 4.5-7.5keV energy band
for thin filter (1)
35- 38 F4.2 10-14W/m2 F(4.5-7.5keV)Medium Flux in the 4.5-7.5keV energy band
for medium filter (1)
40- 43 F4.2 10-14W/m2 F(4.5-7.5keV)Thick Flux in the 4.5-7.5keV energy band
for thick filter (1)
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Note (1): Flux (corrected for Galactic absorption) corresponding to an
observed count rate of 1cts/s in the same energy band.
A Galactic absorbing column density of 3x10^20cm-2, the median value
for the XMM-Newton fields used here, has been assumed. Given the range
of the Galactic absorbing column density along the line of sight (from
∼5x1019 to 1021cm-2) the CR2F in the 0.5-4.5keV energy range are
accurate to 18%; the CR2F in the 4.5-7.5keV energy range are
independent of the Galactic.
Please note that in the case of sources having extreme HR2 values the
observed spectra could be much more complex than a simple power law;
for these sources the conversion factor reported in the table should
be considered only as indicative and a proper X-ray spectral analysis
is needed.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 I10 ---- ObsID XMM-Newton Observation number
12 A1 --- n_ObsID [*] *: fields not considered for the definition
of the HBSS sample
15- 20 A6 --- Filt Filter used
23- 24 I2 h RAh MOS2 image center Righ ascension (J2000)
26- 27 I2 min RAm MOS2 image center Righ ascension (J2000)
29- 32 F4.1 s RAs MOS2 image center Righ ascension (J2000)
34 A1 --- DE- MOS2 image center Declination sign (J2000)
35- 36 I2 deg DEd MOS2 image center Declination (J2000)
38- 39 I2 arcmin DEm MOS2 image center Declination (J2000)
41- 44 F4.1 arcsec DEs MOS2 image center Declination (J2000)
47- 53 F7.1 s ExpTime On-Axis good-time exposure
55- 59 F5.2 cm-2 LogNH Galactic hydrogen column density along the line
of sight from Dickey & Lockman
(1990ARA&A..28..215D 1990ARA&A..28..215D)
61 I1 arcmin Rin Inner radius of the part of the MOS2 image used
63- 64 I2 arcmin Rout Outer radius of the part of the MOS2 image used
66 I1 --- BSS Total number of BSS sources found in the
surveyed area of each MOS2 image
68 I1 --- HBSS ?=- Total number of HBSS sources found in the
surveyed area of each MOS2 image
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- XBS Source name (JHHMMSS.s+DDMMSS)
17- 18 A2 --- n_XBS [abcd ] Note on XBS (G1)
20- 29 I10 ---- ObsID XMM-Newton Observation number
of the HBSS sample
31- 32 I2 h RAh X-ray source Righ ascension (J2000)
34- 35 I2 min RAm X-ray source Righ ascension (J2000)
37- 40 F4.1 s RAs X-ray source Righ ascension (J2000)
42 A1 --- DE- X-ray source Declination sign (J2000)
43- 44 I2 deg DEd X-ray source Declination (J2000)
46- 47 I2 arcmin DEm X-ray source Declination (J2000)
49- 52 F4.1 arcsec DEs X-ray source Declination (J2000)
54- 58 F5.2 arcmin OffAxis Angular distance between the source and
the MOS2 image center
60- 64 F5.2 10-2ct/s Rate Source count rate, in 0.5-4.5keV energy band
66- 69 F4.2 10-2ct/s e_Rate Uncertainty on Rate
71- 75 F5.2 --- HR2 Hardness ratio 2 (G2) (1)
77- 80 F4.2 --- E_HR2 Error on HR2 (upper limit)
82- 85 F4.2 --- e_HR2 Error on HR2 (lower limit)
87- 91 F5.2 --- HR3 ?=- Hardness ratio 3 (G2) (1)
93- 96 F4.2 --- E_HR3 ?=- Error on HR3 (upper limit)
98-101 F4.2 --- e_HR3 ?=- Error on HR3 (lower limit)
103-108 A6 --- Class Optical spectroscopic classification (G3)
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Note (1): For two sources (XBS J052155.0-252220 and XBS J213840.5-424241)
the hardness ratio HR3 is undefined since these sources are
undetected above 2keV.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- XBS Source name (JHHMMSS.s+DDMMSS)
17- 19 A3 --- n_XBS [abcdf ] Note on XBS (G1)
21- 30 I10 ---- ObsID XMM-Newton Observation number
of the HBSS sample
32- 33 I2 h RAh X-ray source Righ ascension (J2000)
35- 36 I2 min RAm X-ray source Righ ascension (J2000)
38- 41 F4.1 s RAs X-ray source Righ ascension (J2000)
43 A1 --- DE- X-ray source Declination sign (J2000)
44- 45 I2 deg DEd X-ray source Declination (J2000)
47- 48 I2 arcmin DEm X-ray source Declination (J2000)
50- 53 F4.1 arcsec DEs X-ray source Declination (J2000)
55- 59 F5.2 arcmin OffAxis Angular distance between the source and
the MOS2 image center
61- 65 F5.2 10-3ct/s Rate Source count rate, in 4.5-7.5keV energy band
67- 70 F4.2 10-3ct/s e_Rate Uncertainty on Rate
72- 76 F5.2 --- HR2 Hardness ratio 2 (G2)
78- 81 F4.2 --- E_HR2 Error on HR2 (upper limit)
83- 86 F4.2 --- e_HR2 Error on HR2 (lower limit)
88- 92 F5.2 --- HR3 ?=- Hardness ratio 3 (G2)
94- 97 F4.2 --- E_HR3 ?=- Error on HR3 (upper limit)
99-102 F4.2 --- e_HR3 ?=- Error on HR3 (lower limit)
104-108 A5 --- Class Optical spectroscopic classification (G3)
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 10 I10 ---- ObsID XMM-Newton Observation number
12- 13 I2 h RAh X-ray source Righ ascension (J2000)
15- 16 I2 min RAm X-ray source Righ ascension (J2000)
18- 21 F4.1 s RAs X-ray source Righ ascension (J2000)
23 A1 --- DE- X-ray source Declination sign (J2000)
24- 25 I2 deg DEd X-ray source Declination (J2000)
27- 28 I2 arcmin DEm X-ray source Declination (J2000)
30- 33 F4.1 arcsec DEs X-ray source Declination (J2000)
35- 39 F5.2 arcmin OffAxis Angular distance between the source and
the MOS2 image center
41- 44 F4.2 --- Illum Illumination factor (1)
45 A1 --- n_Illum [a] Note on Illum (2)
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Note (1): Using this mask image we have thus defined the "Illumination Factor"
of each source as the fraction of sky "effectively" imaged by the
CCDs in a circle of 20" around the source.
Note (2): a = Although this source is well contained inside the MOS2
central CCD it fall above a bad column; for this reason its
"Illumination factor" is below 0.8.
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Global notes:
Note (G1): Individual notes as follows:
a = A detailed X-ray and optical spectral analysis of these sources
have been reported in Caccianiga et al. (2004A&A...416..901C 2004A&A...416..901C).
b = A detailed X-ray and optical spectral analysis of these sources
have been reported in Severgnini et al. (2003A&A...406..483S 2003A&A...406..483S).
c = These sources are more extended than the XMM-Newton EPIC MOS2
Point Spread Function at their off-axis angle. Count rates have
been evaluated using aperture photometry.
d = A detailed X-ray spectral analysis of these sources have been
reported in Galbiati et al. (2005A&A...430..927G 2005A&A...430..927G).
f = These 11 sources belong to the HBSS sample but not to the BSS
sample, while the remaining 56 HBSS sources are present also in
the BSS sample.
Note (G2): Hardness ratios defined as :
HR2 = [C(2-4.5kev)-C(0.5-2keV)/[C(2-4.5kev)+C(0.5-2keV)]
HR3 = [C(4.5-7.5kev)-C(2-4.5keV)/[C(4.5-7.5kev)+C(2-4.5keV)]
where C(0.5-2keV), C(2-4.5keV) and C(4.5-7.5keV) are the "PSF and
vignetting corrected" count rates in the 0.5-2, 2-4.5 and
4.5-7.5keV energy bands, respectively.
The errors on the hardness ratios have been evaluated using
simulations and correspond to 1σ
Note (G3): Optical spectroscopic classification as follows:
AGN1 = broad line AGN
AGN2 = narrow line AGN
GAL = Optically Normal Galaxy
CL = Cluster of Galaxies
BL = BL Lac Object
star = star
? = Tentative classification
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 12-Sep-2005