J/ApJS/103/81 1.425GHz atlas of IRAS bright galaxy sample. II. (Condon+, 1996)
A 1.425 GHz atlas of the IRAS bright galaxy sample, part II.
Condon J.J., Helou G., Sanders D.B., Soifer B.T.
<Astrophys. J. Suppl. Ser., 103, 81-108 (1996)>
=1996ApJS..103...81C 1996ApJS..103...81C (SIMBAD/NED BibCode)
ADC_Keywords: Radio continuum ; Infrared sources ; Galaxies, IR ;
Galaxies, radio
Keywords: astrometry - galaxies: structure - radio continuum: Galaxies
Abstract:
Galaxies with δ≥-45° and |b|>10° in the IRAS Bright
Galaxy Sample, Part II, were observed at 1.425GHz by the Very Large
Array in its B, CnB, C, DnC, and D configurations. An atlas of radio
contour maps and a table listing the principal radio source parameters
(position, flux density, angular size) are given. This atlas of 187
galaxies supplements the 1.49 GHz atlas of 313 galaxies in the revised
Bright Galaxy Sample, Part I. Together, they are complete for
extragalactic sources stronger than S=5.24Jy at λ=60um in the
area |b|>10°, δ>-45°. To the extent that the
far-infrared and radio brightness distributions overlap, these radio
maps provide the most accurate positions and high-resolution images
of the brightest extragalactic far-infrared sources.
Description:
The Bright Galaxy Sample, Part II includes 187 new extragalactic
sources with λ=60um flux densities S≥5.24Jy in the area
|b|>10{deh}, δ>-45°. Table 1 lists the following
far-infrared data for all these sources.
All the galaxies in Table 1 brighter than BT=+12 were mapped at
1.49GHz with the compact D and DnC configurations of the VLA (Condon,
1987ApJS...65..485C 1987ApJS...65..485C, Cat. J/ApJS/65/485; Condon et al.
1987ApJS...65..543C 1987ApJS...65..543C), and a number of UGC (Nilson, 1973, Cat. VII/26)
galaxies identified with radio sources stronger than 150mJy at 1.4GHz
were mapped with the C-configuration at 1.49GHz (Condon & Broderick,
1988AJ.....96...30C 1988AJ.....96...30C). These galaxies were not reobserved. New 1.425GHz
observations of the remaining galaxies were made with the
high-resolution B configuration on 1993 April 18 and 25, with the BnC
configuration on 1993 May 24, and with the C configuration on 1993
July 6 and August 1.
The new radio results are presented as an atlas of contour maps, a
table of radio source parameters, and supplementary notes on
individual sources. The values of n specifying the lowest contours are
listed in Table 2.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 70 187 Infrared data
table2.dat 93 225 Radio data
--------------------------------------------------------------------------------
See also:
VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973)
J/ApJS/65/485 : 1.49GHz Atlas of Spiral Galaxies (Condon, 1987)
J/ApJS/73/359 : 1.49GHz atlas of the IRAS bright galaxies (Condon+, 1990)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Galaxy name
17- 18 I2 h RAh Infrared right ascension (B1950.0)
20- 21 I2 min RAm Infrared right ascension (B1950.0)
23- 26 F4.1 s RAs Infrared right ascension (B1950.0)
28 A1 --- DE- Infrared declination sign (B1950.0)
29- 30 I2 deg DEd Infrared declination (B1950.0)
32- 33 I2 arcmin DEm Infrared declination (B1950.0)
35- 36 I2 arcsec DEs Infrared declination (B1950.0)
38- 43 F6.2 Jy S25um IRAS flux density at 25um (1)
45- 50 F6.2 Jy S60um IRAS flux density at 60um (1)
52- 58 F7.2 Jy S100um ?=- IRAS flux density at 100um (1)
60- 64 F5.1 Mpc Dist Distance (2)
66- 70 F5.2 [Lsun] logLFIR ?=- Absolute far-infrared luminosity (3)
--------------------------------------------------------------------------------
Note (1): IRAS flux density taken from Sanders et al.
(1995AJ....110.1993S 1995AJ....110.1993S, Cat. J/AJ/110/1993).
Note (2): Distance D=v/H0 calculated with H0=75km/s/MPC, corrected for
Virgocentric flow and group membership as described in
Soifer et al. (1987ApJ...320..238S 1987ApJ...320..238S).
Note (3): calculated by fitting the λ=60um and λ=10um flux
densities to a single-temperature Planck function multiplied by an emissivity
index n=1 (see the Appendix of Helou et al., 1988ApJS...68..151H 1988ApJS...68..151H), in
units of solar luminosity L☉=3.83x1026W.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Galaxy name
17- 18 I2 arcsec Beam ? FWHM restoring beamwidth (1)
19 A1 --- --- [x]
20- 21 I2 arcsec Beam2 ? FWHM restoring beamwidth (1)
23- 25 I3 --- n ? value of n corresponding to the lowest
contour, 2n/2mJy/beam, plotted in
Figure 1 or 2 of the paper
27- 34 F8.1 mJy S ? Total flux density at 1.425GHz (new
observations) or 1.49GHz (NGC 0972,
UGC 02855, and UGC 02866 plus observations
with 48", 54", or 60" FWHM beamwidth)
36 A1 --- n_S Note on S (2)
38- 42 F5.2 [W/Hz] logL ? Absolute spectral luminosity at
1.425 or 1.49GHz (3)
44- 45 I2 h RAh ? Component radio right ascension (B1950) (4)
47- 48 I2 min RAm ? Component radio right ascension (B1950) (4)
50- 53 F4.1 s RAs ? Component radio right ascension (B1950) (4)
55 A1 --- DE- Component radio declination (B1950) (4)
56- 57 I2 deg DEd ? Component radio declination (B1950) (4)
59- 60 I2 arcmin DEm ? Component radio declination (B1950) (4)
62- 63 I2 arcsec DEs ? Component radio declination (B1950) (4)
65- 71 F7.1 mJy Sp ? Peak flux density (4)
72- 78 F7.1 mJy SI ? Integrated flux density (4)
80 A1 --- l_thetaM Limit flag on thetaM
81- 83 I3 arcsec thetaM ? FWHM major-axis diameter or diameter for
upper limit (4)
84 A1 --- --- [x]
85- 87 I3 arcsec thetam ? FWHM minor-axis diameter (4)
89- 91 I3 deg PA ? Major-axis position angle
(measured east from north) (4)
93 A1 --- Note [*] * indicates a note in the paper
--------------------------------------------------------------------------------
Note (1): Beamwidths of 48", 54", or 60" indicate D- or DnC-configuration maps
from Condon (1987ApJS...65..485C 1987ApJS...65..485C, Cat. J/ApJS/65/485) or Condon et al.
(1987ApJS...65..543C 1987ApJS...65..543C).
Note (2): Parentheses indicate particularly uncertain values, and brackets
enclose flux densities of very extended sources measured with single-dish
telescopes (see Condon, 1987ApJS...65..485C 1987ApJS...65..485C, Cat. J/ApJS/65/485).
Note (3): calculated from L=4πD2(1+z)1+alphaS with an assumed
spectral index alpha =-dlnS/dlnv~=+0.75.
Note (4): These parameters do not describe the whole radio source directly but
give the parameters from Gaussian fits to one or more source components.
If only the right ascension, declination, and peak flux density Sp are
specified, then only the source peak was fitted.
For full Gaussian fits down to the baseline level, the Gaussian integrated
flux density SI is also listed.
If a component was clearly resolved, its deconvolved major and minor FWHM
diameters (θM, θm) and its major-axis position angle
(P.A.) are given.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Condon et al., Paper I 1990ApJS...73..359C 1990ApJS...73..359C, Cat. J/ApJS/73/359
(End) Patricia Vannier [CDS] 10-Jun-2022