J/ApJ/610/128 NIR colors of hard X-ray-selected AGN (Watanabe+, 2004)
Near-infrared colors of hard X-ray-selected active galactic nuclei.
Watanabe C., Ohta K., Akiyama M., Ueda Y.
<Astrophys. J., 610, 128-139 (2004)>
=2004ApJ...610..128W 2004ApJ...610..128W
ADC_Keywords: Active gal. nuclei ; Photometry, infrared ; X-ray sources ;
Redshifts
Keywords: galaxies: active - infrared: galaxies - quasars: general - surveys -
X-rays: galaxies
Abstract:
We present results of near-infrared photometry (J, H, Ks) for a hard
X-ray-selected sample of active galactic nuclei (AGNs) obtained from
optical identification of the sources detected in ASCA surveys (total
∼75deg2) with a flux limit of (1-3)x10-13erg/s/cm2 (2-10keV).
The sample covers the AGNs at 0.1≲z≲1 with
L2-10keV=1042-1046erg/s with very high completeness. The
near-infrared photometric data of the sample are obtained from the Two
Micron All Sky Survey (2MASS, Cat. II/246) and observations with
Kitt Peak National Observatory 2.1m telescope and the University of
Hawaii 2.2m telescope.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 140 104 Properties of ASCA AGNs
--------------------------------------------------------------------------------
See also:
J/ApJS/148/275 : ASCA AGN optical identifications (Akiyama+, 2003)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 A17 --- Name X-ray source name (1)
19- 24 A6 --- NName Identification number (1)
26- 30 F5.2 mag Jmag The J band magnitude
32- 35 F4.2 mag e_Jmag Uncertainty in Jmag
37 A1 --- l_Hmag Limit flag on Hmag
38- 42 F5.2 mag Hmag ? The H band magnitude
44- 47 F4.2 mag e_Hmag ? Uncertainty in Hmag
49 A1 --- l_Ksmag Limit flag on Ksmag
50- 54 F5.2 mag Ksmag The Ks band magnitude
56- 59 F4.2 mag e_Ksmag ? Uncertainty in Ksmag
61 A1 --- f_Ksmag [m] Indicates Ksmag was converted from K
by Akiyama & Ohta (2001PASJ...53...63A 2001PASJ...53...63A)
63- 66 F4.2 mag J-Ks The (J-Ks) color
68- 71 F4.1 mag Bmag ? The B band magnitude (2)
73 A1 --- f_Bmag [US] Flag on Bmag (3)
75- 78 F4.1 mag Rmag The R band magnitude (2)
80 A1 --- f_Rmag [USKB] Flag on Rmag (3)
82- 86 A5 --- IRef The NIR data source (4)
88- 92 F5.3 --- z Redshift (5)
94 A1 --- f_z [j] Flag on z (6)
96-100 F5.2 10-13mW/m2 Flux The 2-10keV flux in
units of 10-13erg/s/cm2 (7)
102 A1 --- f_Flux [ikl] Flag on Flux (8)
104-108 F5.2 [10-7W] logL Log of the 2-10 keV luminosity in
units of erg/s (9)
110-114 F5.2 10+22/cm2 NH Best fit hydrogen column density (10)
116-119 F4.2 10+22/cm2 e_NH ? Lower limit error on NH
121-125 F5.2 10+22/cm2 E_NH ? Upper limit error on NH
127-129 F3.1 --- Gamma Intrinsic photon index (11)
131-133 F3.1 --- e_Gamma ? Lower limit error on Gamma
135-137 F3.1 --- E_Gamma ? Upper limit error on Gamma
--------------------------------------------------------------------------------
Note (1): X-ray source name and identification number
(Ueda et al.: 1999, Cat. J/ApJ/518/656 and 2001, Cat. J/ApJS/133/1
and Akiyama et al.: 2000ApJ...532..700A 2000ApJ...532..700A, and 2003, Cat. J/ApJS/148/275).
Note (2): From APM catalog (2000, Cat. I/267), unless otherwise noted.
Magnitudes are converted from O and E magnitudes of APM catalogue by
using the equations by Evans (1989A&AS...78..249E 1989A&AS...78..249E).
Note (3): The flags on Bmag and Rmag have the following meaning:
U = Determined by photometric observations with a CCD camera on the
UH88 inch telescope (Akiyama et al. 2003, Cat. J/ApJS/148/275).
S = Determined from the spectrophotometric data (Akiyama et al. 2003,
Cat. J/ApJS/148/275).
K = Determined by relative photometry with mosaic CCD image taken at KISO
observatory (Akiyama et al. 2000ApJ...532..700A 2000ApJ...532..700A).
B = APM magnitude data is blended. Deblending was done using CCD image
taken during the spectroscopic observations (Akiyama et al.
2000ApJ...532..700A 2000ApJ...532..700A).
Note (4): KPNO, 2MASS, and UH shows Kitt Peak National Observatory
(2.1m telescope), 2MASS All-Sky Point Source Catalog (Cat. II/246),
and University of Hawaii (88 inch telescope), respectively.
Note (5): Determined by the spectroscopic observations in optical
(Akiyama et al. 2000ApJ...532..700A 2000ApJ...532..700A, 2003 Cat. J/ApJS/148/275).
Note (6): The flag on z is defined as follows:
j = The identification of this X-ray source was not correct in
Akiyama et al. (2000ApJ...532..700A 2000ApJ...532..700A). See the footnote in section 4.3.2.
Note (7): Conversions from countrates are done based on the best-fit
absorbed power-law spectra. (More details for the conversions are
described by Ueda et al. 2003ApJ...598..886U 2003ApJ...598..886U).
Note (8): Flags on Flux, defined as follows:
i = X-ray data from Loaring et al. (2003MNRAS.345..865L 2003MNRAS.345..865L).
k = X-ray data from the follow-up observation with XMM-Newton. See
Ueda et al. (2003ApJ...598..886U 2003ApJ...598..886U).
l = X-ray data from the follow-up observation with ASCA.
Note (9): Absorption-corrected in the rest-frame 2-10keV band.
Note (10): For the absorbed power-law model. The value of 0 without error
indicates that NH=0 is assumed if the best-fit photon index is
larger than 1.9. See Section 2 and Ueda et al. (2003ApJ...598..886U 2003ApJ...598..886U)
for the details.
Note (11): The value of 1.9 without error indicates that the intrinsic
photon index of 1.9 is assumed if the best-fit photon index is smaller
than 1.9. See Section 2 and Ueda et al. (2003ApJ...598..886U 2003ApJ...598..886U) for the
details.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 16-Mar-2005