J/ApJS/103/145 Source catalog for the PMN zenith survey (Wright+ 1996)
The Parkes-MIT-NRAO (PMN) surveys.
VIII. Source catalog for the zenith survey (-37.0deg<Dec.←29.0deg)
Wright A.E., Griffith M.R., Hunt A.J., Troup E., Burke B.F., Ekers R.D.
<Astrophys. J. Suppl. Ser. 103, 145 (1996)>
=1996ApJS..103..145W 1996ApJS..103..145W
ADC_Keywords: Radio source ; Surveys
Keywords: radio continuum: general - surveys
Abstract:
We present a catalog of radio sources discovered at a frequency of
4850 MHz in the zenith zone (-37deg<Dec.←29deg) of the
Parkes-MIT-NRAO (PMN) surveys. The zenith survey covers 0.677sr and
contains 2400 sources to a flux limit of 72mJy. The survey was made
using the Parkes 6 m radio telescope with the NRAO multibeam receiver
during 1990. The data-taking and principal reduction methods used for
the PMN surveys have been extensively described in previous papers. In
this paper, we describe the specific details of the zenith survey and
we provide a list of sources. Later papers in the series will describe
the images made from, and provide analysis of, the data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 96 2400 Sources in the PMN zenith survey
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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- 14 A14 --- PMNJ *PMNJ number
16- 17 I2 h RAh Right ascension (J2000)
18 A1 --- --- Always ':'
19- 20 I2 min RAm Right ascension (J2000)
21 A1 --- --- Always ':'
22- 25 F4.1 s RAs Right ascension (J2000)
27 A1 --- DE- Declination sign
28- 29 I2 deg DEd Declination (J2000)
30 A1 --- --- Always ':'
31- 32 I2 arcmin DEm Declination (J2000)
33 A1 --- --- Always ':'
34- 35 I2 arcsec DEs Declination (J2000)
37- 43 I7 mJy Flux 4850 MHz flux density from fixed-width fit
45- 47 I3 mJy e_Flux *Estimated standard error in Flux
49- 55 I7 mJy GFlux *[]? 4850 MHz flux density, derived from the
General-Width fit (see Paper 1)
57- 59 I3 mJy e_GFlux *[]? Estimated standard error in GFlux
61- 64 F4.1 --- Wid1 *[]? Semi-major axis of fitted Gaussian
66- 69 F4.1 --- Wid2 *[]? Semi-minor axis of fitted Gaussian
71- 76 F6.1 deg PA []? Position angle of Wid1, east of north
78- 81 F4.1 --- SI *[]? Spectral index
84 A1 --- D *[N] Observation session flag
86 A1 --- X *[X] Extended source flag
88 A1 --- G *[G] Galactic plane flag
90 A1 --- Z *[ ] Zenith flag
92 A1 --- S *[S] Solar contamination flag
94 A1 --- P *[P] PKSCAT90 flag
96 A1 --- M *[M] Molonglo 408 MHz catalog flag
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Note on PMNJ:
The entry in this column defines the J2000-derived source name
(e.g. PMNJ0115-3427) in a similar manner to that used in the
PKSCAT90 catalog (Wright & Otrupcek 1990) and closely following the
IAU recommendations of Dickel, Lortet, & de Boer (1987, A&AS, 68,
75). The first three letters, PMN, denote the Parkes-MIT-NRAO
survey, and the fourth letter denotes that the equinox and equator
is J2000. The rest of the name is derived from the hours and minutes
of the R.A. and the degrees and minutes of the Decl. (both
J2000). For a few objects, the names (but not the sources) are
duplicates: in such cases we have appended an "a" and a "b" to the
names.
Note on e_Flux:
An estimated standard error >99 mJy is listed as 99 mJy because of
space limitations: the accurate value can be obtained from equation 4
in the printed paper.
Note on GFlux:
The 4850 MHz flux density derived from the General-Width fit. This was
done for and is only meaningful for sources greater than about 100 mJy.
Note on e_GFlux:
The estimated standard error for GFlux. A standard error >99 mJy is
listed as 99 mJy because of space limitations: the accurate value
can be obtained from equation 4 in the printed paper.
Note on Wid1:
The semi-major axis of the fitted Gaussian in beam widths. A value
of 1.0 = 2.1 arcmin
Note on Wid2:
The semi-minor axis of the fitted Gaussian in beam widths.
Note on SI:
The spectral index, alpha, computed between 2700 MHz from PKSCAT90
and the the present flux densities at 4850 MHz. This index is
defined by the equation S proportional to nu^alpha.
Note on D:
This column was used in Papers 2 and 3 to indicate the session in
which a source was observed. "J" means the June and "N" the November
session. All the observations for the equatorial survey were
conducted in November. However, this column is included to be
consistent with the previous portions of the survey.
Note on X:
An "X" indicates that the source is probably extended.
Note on G:
A "G" indicates that the source lies within 10 degrees of the
Galactic plane.
Note on Z:
This column was used in Paper 2 and 3 to indicate a weaker source
that was observed near the Parkes telescope's zenith (Decl. -33
deg) where we had some trouble removing the canonical baseline
(see Sect. 3 in the printed paper). The observations for the zenith
survey, however, were made well off the meridian and thus lay far
from the zenith. We retain this column to be consistent with the
format of previous portions of the survey, although no sources found
in the zenith survey are labelled with a "Z."
Note on S:
An "S" indicates that the source lies within 5 degrees of solar
contamination from the telescope's sidelobes and the data listed
may be of lower quality.
Note on P:
A "P" indicates that this source lies within 2' of a source listed
in the PKSCAT90 database and is probably the same object.
Note on M:
An "M" indicates that this source lies within 2' of a source listed
in the Molonglo 408 MHz catalog (Large et al. 1981 VIII/16) and is
probably the same object.
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References:
Large et al. 1981, MNRAS, 194, 693 =CDS Catalogue VIII/16
Wright & Otrupcek 1990 (PKSCAT90) =CDS Catalogue VIII/15
Origin: AAS CD-ROM series, Volume 6, 1996 Lee Brotzman [ADS] 23-Apr-96
(End) [CDS] 06-Sep-1996