J/MNRAS/360/782 X-ray-selected normal galaxies (Georgantopoulos+, 2005)
The XMM-Newton Needles in the Haystack Survey: the local X-ray luminosity
function of `normal' galaxies.
Georgantopoulos I., Georgakakis A., Koulouridis E.
<Mon. Not. R. Astron. Soc., 360, 782-790 (2005)>
=2005MNRAS.360..782G 2005MNRAS.360..782G
ADC_Keywords: X-ray sources ; Galaxies, optical ; Redshifts
Keywords: surveys - galaxies: luminosity function, mass function -
X-rays: galaxies - X-rays: general
Abstract:
In this paper we estimate the local (z<0.22) X-ray luminosity function
of 'normal' galaxies derived from the XMM-Newton Needles in the
Haystack Survey. This is an on-going project that aims to identify
X-ray-selected normal galaxies (i.e. non-AGN dominated) in the local
Universe. We are using a total of 70 XMM-Newton fields covering an
area of 11deg2 which overlap with the Sloan Digital Sky Survey Data
Release 2. Normal galaxies are selected on the basis of their resolved
optical light profile, their low X-ray-to-optical flux ratio
[log(fx/fo)←2] and soft X-ray colours. We find a total of 28
candidate normal galaxies to the 0.58keV band flux limit of
2x10-15erg/cm2/s. Optical spectra are available for most sources in
our sample (82 per cent). These provide additional evidence that our
sources are bona fide normal galaxies with X-ray emission coming from
diffuse hot gas emission and/or X-ray binaries rather than a
supermassive black hole.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 73 70 The XMM-Newton pointings
table2.dat 88 28 The candidate normal galaxy sample
table3.dat 87 3 The excluded hard low-luminosity AGN
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See also:
B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2002)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ObsID XMM observation identification number
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 19 I2 s RAs Right ascension (J2000)
21 A1 --- DE- Declination sign (J2000)
22- 23 I2 deg DEd Declination (J2000)
25- 26 I2 arcmin DEm Declination (J2000)
28- 29 I2 arcsec DEs Declination (J2000)
31- 36 A6 --- Filt Filter name
38- 42 F5.2 10+20cm-2 NH Hydrogen column density
44- 47 F4.1 ks ExpTimePN ?=- PN instrument exposition time
49- 52 F4.1 ks ExpTimeM1 ?=- MOS1 instrument exposition time
54- 73 A20 --- Field Field name
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Byte-by-byte Description of file: table[23].dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [GGK2005] Identification number
4- 5 I2 h RAh X-ray Right ascension (J2000)
7- 8 I2 min RAm X-ray Right ascension (J2000)
10- 14 F5.2 s RAs X-ray Right ascension (J2000)
16 A1 --- DE- X-ray Declination sign (J2000)
17- 18 I2 deg DEd X-ray Declination (J2000)
20- 21 I2 arcmin DEm X-ray Declination (J2000)
23- 27 F5.2 arcsec DEs X-ray Declination (J2000)
29- 33 F5.2 mag rmag SDSS r optical magnitude
35 A1 --- l_Prob Limit flag on Prob
36- 39 F4.2 % Prob Probability the optical counterpart is a
spurious alignment
41- 43 F3.1 arcsec DXO X-ray/optical position offset
45- 48 F4.2 10-17W/m2 FX Absorbed X-ray flux in the 0.5-8keV
spectral band
50- 53 F4.2 10-17W/m2 e_FX rms uncertainty on FX
55 A1 --- l_HR Limit flag on HR
56- 60 F5.2 --- HR Hardness ratio derived in the 0.5-2 and
2-8keV bands
62- 65 F4.2 --- e_HR ? rms uncertainty on HR
67- 71 F5.2 --- log(FX/Fo) X-ray-to-optical flux ratio
73- 77 F5.3 --- z Spectroscopic or photometric redshift
78- 79 A2 --- n_z [bc ] Note on z (1)
81- 85 F5.2 10+34W logLX Logarithmic 0.5-8keV X-ray luminosity
87 A1 --- Sp Spectral features (2)
88 A1 --- u_Sp [*] * denotes ambiguous SDSS spectral
classification
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Note (1): Note on redshift as follows:
b = Source at the same redshift as the target of the XMM-Newton pointing
c = Photometric redshift from the SDSS
Note (2): Spectral type as follows:
A = absorption lines
E = narrow emission lines
C = both narrow emission and absorption lines
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Apr-2006