J/AJ/124/2351 Chandra Deep Field North survey. XII (Bauer+, 2002)
The Chandra Deep Field North survey.
XII. The link between faint X-ray and radio source populations.
Bauer F.E., Alexander D.M., Brandt W.N., Hornschemeier A.E., Vignali C.,
Garmire G.P., Schneider D.P.
<Astron. J., 124, 2351-2363 (2002)>
=2002AJ....124.2351B 2002AJ....124.2351B
ADC_Keywords: X-ray sources ; Radio sources
Keywords: active - galaxies: starburst - radio continuum - X-rays
Abstract:
We investigate the relationship between faint X-ray and 1.4GHz radio
source populations detected within 3' of the Hubble Deep Field (North)
using the 1Ms Chandra (Cat. J/AJ/122/2810) and 40µJy VLA (Cat.
J/ApJ/533/611) surveys. Within this region, we find that ∼42% of the
62 X-ray sources have radio counterparts and ∼71% of the 28 radio
sources have X-ray counterparts; thus, a 40µJy VLA survey at 1.4GHz
appears to be well matched to a 1Ms Chandra observation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 100 62 3' sample: X-ray
table2.dat 100 28 3' sample: 1.4GHz
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See also:
J/ApJ/533/611 : 1.4GHz survey in HDF region (Richards+, 2000)
J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)
J/AJ/122/2810 : Chandra Deep Field North Survey. V. 1Ms catalog (Brandt+, 2001)
J/AJ/126/539 : The Chandra Deep Fields North and South (Alexander+, 2003)
Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- CXOHDFN JHHMMSS.s+DDMMSS designation,
18 A1 --- l_Imag Limit flag on Imag
19- 23 F5.2 mag Imag I magnitude
25 A1 --- l_S1.4GHz Limit flag on S1.4GHz
26- 31 F6.1 uJy S1.4GHz ? Flux density at 1.4GHz
32 A1 --- n_S1.4GHz [abg] Note on S1.4GHz (9)
34 A1 -- l_S8.5GHz Limit flag on S8.5GHz
35- 39 F5.1 uJy S8.5GHz ? Flux density at 8.5GHz
40 A1 --- n_S8.5GHz [b] Note on S8.5GHz (9)
42 A1 --- l_alphar Limit flag on alphar
43- 47 F5.2 --- alphar ? Radio spectral slope (1)
48 A1 --- n_alphar [f] Note on alphar (9)
50 A1 --- l_F0.5-8.0keV Limit flag on F0.5-8.0keV
51- 55 F5.1 10-19W/m2 F0.5-8.0keV ? Observed flux at 0.5-8.0keV (2)
56 A1 --- n_F0.5-8.0keV [c] Note on F0.5-8.0keV (9)
58 A1 --- l_Gamma Limit flag on Gamma
59- 63 F5.2 --- Gamma ? X-ray power-law photon index (3)
65 A1 --- l_S15um Limit flag on S15um
66- 68 I3 mJy S15um ? ISOCAM flux density at 15µm (4)
69 A1 --- n_S15um [d] Note on S15um (9)
71- 75 F5.3 --- z ? Spectroscopic redshift (5)
76 A1 --- n_z [fh] Note on z (9)
78 A1 --- l_logL0.5-8.0keV Limit flag on logL0.5-8.0keV
79- 83 F5.2 [10-7W] logL0.5-8.0keV ? Absorption-corrected rest-frame
0.5-8.0keV luminosity (6)
85- 86 A2 --- MType Spectral classification (7)
88 A1 --- Radio Radio classification from Richards,
1999, Ph.D. thesis, Univ. Virginia,
only in table2.dat
90- 98 A9 --- Class Source classification category (8)
100 A1 --- n_Class [e] Note on Class (9)
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Note (1): Radio spectral slope calculated using 1.4GHz and 8.5GHz fluxes
measured in their respective 3.5" convolved images (Richards,
2000, Cat. J/ApJ/533/611)
Note (2): Observed flux at 0.5-8.0keV assuming the value of Gamma indicated in
the nest column, or Gamma=1.4 if not listed (See paper V, Brandt et
al., 2001, Cat. J/AJ/122/2810) for details)
Note (3): X-ray power-law photon index computed from the band ratio (i.e., the
ratio of 2.0-8.0keV count rate, or 3σ upper limit, to
0.5-2.0keV count rate; see Paper V, Brandt et al., 2001,
Cat. J/AJ/122/2810 for details). Note that many sources lack
Gamma-values because of their low number of counts.
Note (4): ISOCAM flux density at 15µm as reported in Aussel et al.
(1999, Cat. J/A+A/342/313, 2002, in prep.).
Three-sigma 15µm upper limits were computed for all X-ray sources
within the complete ISOCAM area following Aussel et al. (2002,
in prep.).
Note (5): Spectroscopic redshift from the catalog of Cohen et al.
(2000, Cat. J/ApJ/538/29) or Dawson et al. (2001,
Cat. J/AJ/122/598).
Note (6): Absorption-corrected rest-frame 0.5-8.0keV luminosity, calculated
assuming the unabsorbed spectrum is a Gamma=2.0 power law.
Note (7): Spectral classification from the catalog of Cohen et al. (2000,
Cat. J/ApJ/538/29) or if from Dawson et al. (2001,
Cat. J/AJ/122/598) or Barger et al. (2002AJ....124.1839B 2002AJ....124.1839B),
converted to the Cohen et al. (2000, Cat. J/ApJ/538/29)
classification scheme as follows:
A = absorption-line galaxies
E = emission-line galaxies
I = intermediate type galaxies
Q = broad-emission line galaxies
EA = Galaxy showing A and E characteristics
EI = Galaxy showing E and I characteristics
EQ = Galaxy showing E and Q characteristics
Note (8): Classes defined as follows (question mark indicate tentative)
AGN = AGN-dominated sources
ALG = absorption-line galaxies
ELG = emission-line galaxies
OF = optically faint
Note (9): Notes as follows:
a = Source lies outside of the publicly available VLA 1.4GHz image
and thus has no detection down to a 5σ flux density limit
of ∼40Jy at 1.4GHz.
b = Measured using the publicly available images down to a 3σ limit
c = Detected only in the 0.5-2.0keV band. We calculated X-ray upper
limits following Chap. 3.2.1 of Paper V (Brandt et al., 2001,
Cat. J/AJ/122/2810)
d = Source lies outside the ISOCAM field of view.
e = Source lies in the AGN region of Fig. 3 but is considered to be
part of the galaxy sample.
f = Calculated using lower significance 1.4GHz and/or 8.5GHz flux
densities measured from the publicly available 1.9" and 3.5"
convolved images, respectively. As such, these spectral slopes
should be considered only approximate, since the beam sizes of
the 1.4GHz and 8.5GHz images have not been properly matched.
g = Flux density taken from the WSRT 1.4GHz catalog of
Garrett et al., 2000A&A...361L..41G 2000A&A...361L..41G.
h = Photometric redshift, obtained from the catalog presented in
Paper IX (Bauer et al., 2002AJ....123.1163B 2002AJ....123.1163B).
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History:
From electronic version of the journal
References:
Hornschemeier et al., Paper I 2000ApJ...541...49H 2000ApJ...541...49H
Hornschemeier et al., Paper II 2001ApJ...554..742H 2001ApJ...554..742H, Cat. J/ApJ/554/742
Brandt et al., Paper IV 2001AJ....122....1B 2001AJ....122....1B
Alexander et al., Paper V 2001AJ....122.2810B 2001AJ....122.2810B, Cat. J/AJ/122/2810
Alexander et al., Paper VI 2001AJ....122.2156A 2001AJ....122.2156A
Brandt et al., Paper VII 2001ApJ...558L...5B 2001ApJ...558L...5B
Hornschemeier et al., Paper VIII 2002ApJ...568...82H 2002ApJ...568...82H
Bauer et al., Paper IX 2002AJ....123.1163B 2002AJ....123.1163B
Alexander et al., Paper X 2002AJ....123.1149A 2002AJ....123.1149A
Alexander et al., Paper XI 2002ApJ...568L..85A 2002ApJ...568L..85A
Alexander et al., Paper XIII 2003AJ....126..539A 2003AJ....126..539A, Cat. J/AJ/126/539
Alexander et al., Paper XIV 2003AJ....125..383A 2003AJ....125..383A
Hornschemeier et al., Paper XV 2003AJ....126..575H 2003AJ....126..575H
Vignali et al., Paper XVI 2002ApJ...580L.105V 2002ApJ...580L.105V
(End) James Marcout, Patricia Bauer [CDS] 12-Feb-2004