J/ApJS/80/211 Compact Radio Sources Near the Galactic Plane (Helfand+ 1992)
Compact radio sources near the galactic plane.
Helfand D.J., Zoonematkermani S., Becker R.H., White R.L.
<Astrophys. J. Suppl. 80, 211 (1992)>
=1992ApJS...80..211H 1992ApJS...80..211H
ADC_Keywords: Radio sources ; Galactic plane ; Milky Way ; H II regions ;
Planetary nebulae
Keywords: ISM: HII Regions; ISM: Planetary Nebulae: General;
Radio Continuum: Galaxies; Surveys
Abstract:
The results of the extension of the 20-cm Galactic-plane survey
reported by Zoonematkermani to Galactic latitudes of ±1.8° over
the central region of the Milky Way are reported. A total of 1457
discrete radio sources down to flux densities of less than about 5mJy,
and 95% completion is achieved at 20mJy. A detailed comparison of all
radio sources from the survey in this longitude range with the IRAS
Point Source Catalog provides classification for 13% of the objects,
including 159 compact H II regions, and nearly 100 planetary nebulae,
over 70 of which are identified. The identity of the remaining radio
sources is discussed.
Description:
This catalog tabulates the results of the extension of the 20cm
Galactic plane survey reported by Zoonematkermani and coworkers to
Galactic latitudes of ±1.8° over the central region of the Milky
Way (-10≤l°≤40°) The observations were made in 1989 entirely
in the B-configuration of the VLA in spectral mode using 14
independent 3MHz bandpasses centered on 1490MHz.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 122 1488 *Compact radio sources near Galactic plane
table4.dat 81 256 The IRAS subsample: HII, PN, ambiguous candidates
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Note on table3.dat: this version contains 31 more sources than the printed
table and one renamed source name, see the "History" section below.
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See also:
J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)
J/ApJS/118/201 : Galactic Center 6 and 20cm survey (Lazio+, 1998)
J/ApJ/699/186 : VLA observations of the Galactic center (Zhao+, 2009)
J/ApJ/773/67 : Compact radio sources near the Galactic center (Roy, 2013)
J/ApJS/174/481 : 2LC Compact Radio Sources in the galactic center (Lazio+, 200
J/AZh/91/503 : Compact radio sources near Galactic center (Pynzar'+, 2014)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name IAUname in format LLL.lll+B.bbb (5)
14 A1 --- f_Name [*a] Added or modified name (3)
16- 17 I2 h RAh Right ascension (B1950)
19- 20 I2 min RAm Right ascension (minutes)
22- 26 F5.2 s RAs Right ascension (seconds)
28 A1 --- DE- Declination sign (B1950)
29- 30 I2 deg DEd Declination (B1950)(degrees)
32- 33 I2 arcmin DEm Declination (minutes)
35- 38 F4.1 arcsec DEs Declination (seconds)
41- 47 F7.1 mJy Speak [4/1807] Peak 1490MHz flux (1)
49- 55 F7.1 mJy Sint [0/6473] Integrated 1490MHz flux (1)
57- 61 F5.1 arcsec diam [0/23] Source diameter (2)
63- 67 F5.1 arcmin offset [0/34] off-axis angle
(for sensitivity correction)
70-122 A53 --- Note Notes (4)
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Note (1): The values of Speak and Sint have been corrected for the loss of
sensitivity of the primary beam of the antennas away from the field centre.
Note (2): The quoted diameters are the mean of the best-fit FWHM of the
major and minor axes of the sources as determined by the Gaussian
fits. Values of '0.0' were replaced by blank entries at CDS.
Note (3): Flag added at CDS (21-May-2015):
* = source which does not exist in the printed table 3 (31 sources),
or the name was modified (the source "21.504-0.883" was printed
as "21.505-0.881"; this last name was added in the "Notes" column).
a = source which exists in the printed table, but not in the electronic
version supplied by R.H. Becker to H. Andernach (3 sources are
concerned: 356.908-0.984, 357.813-1.107, and 36.517-0.970)
Note (4): Keys to the notes (table 2):
+ = Flux density determined by summing within a polygon
* = Marks a set of related sources
R = Catalogued in Reich et al. 1984 (J/A+AS/58/197);
R is followed by the source number
INT = The integrated flux density (in mJy) derived from
a region of diffuse emission surrounding the source
A = Cataloged in Altenhoff et al. 1978 6cm list (J/A+AS/35/23)
H = Cataloged in Handa et al. (1987PASJ...39..709H 1987PASJ...39..709H).
H is followed by the source number; an H alone indicates a source
which appears in the contour plots, but not in the catalog.
TX = Cataloged in Texas 365MHz interferometer survey
(Douglas et al. 1980; see VIII/42) with flux density in mJy,
from a preliminary version of the catalog (are subject to
revision by ∼10%)
SNR = Supernova remnant; SNRxx.x+x.x stands for Gxx.x+x.x source from
catalog of Green 1987 (1989A&AS...78..277G 1989A&AS...78..277G)
RL = Recombination Lines; RLxx.xxx+x.xxx corresponds to recombination
lines observed from source at galactic position l=xx.xxx, b=x.xxx
by Lockman (1989ApJS...71..469L 1989ApJS...71..469L) and/or Caswell & Haynes 1987
(J/A+A/171/261)
I = Coincident with an entry in the IRAS Point Source Catalog (II/125)
PN = Planetary Nebula; PNxxx+x.x corresponds to the entry Gxxx+x.x in
Strasbourg Planetary Nebula Catalog
GPS = Object was also detected in the inner portion of our 20cm survey
GSC = Space Telescope Guide Star Catalog (I/254)
MLNSO = Master List of Non-Stellar Objects; MLNSOxxxx corresponds to
source xxxx in this list.
Note (5): Notice that this name is not unique for:
1.030-1.108: 2 sources separated by 2.2arcsec
36.521+0.963: 2 sources separated by 0.9arcsec
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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 A1 --- Cl Candidate Class: a=HII region,
b=Planetary Nebula, c=ambiguous
3- 15 A13 --- GPS Source designation (based on Galactic position)
17- 20 I4 mJy S20 [7/3780] Flux density at 20cm
22- 23 I2 arcsec Size [0/90] Size of source
25- 35 A11 --- IRAS IRAS name of the source (II/125)
36 A1 --- l_S12 [<] Limit flag on S12
37- 42 F6.1 Jy S12 [0.5/1358] IRAS 12µm flux density
44 A1 --- l_S25 [<] Limit flag on S25
45- 50 F6.1 Jy S25 [0.9/5147] IRAS 25µm flux density
52 A1 --- l_S60 [<] Limit flag on S60
53- 59 F7.1 Jy S60 [1/18560] IRAS 60µm flux density
61 A1 --- l_S100 [<] Limit flag on S100
62- 68 F7.1 Jy S100 [40/66650] IRAS 100µm flux density
70- 72 F3.2 --- p(Cl) [0.65/0.99] Probability of being of "Cl" class
74- 81 A8 --- Notes Comments on IRAS source (1)
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Note (1): Explanation of "Comments" column in Tables 4a, 4b, and 4c:
RL = recombination line observed
PN = cataloged optical planetary nebula;
PPN = possible PN based on discussion in Sect.5 of text;
PHII = possible ultra-compact HII region based on discussion in Sect.5 of text;
TF = source listed in the Texas catalog with a flux density such that
the 365-1400MHz spectral index is <0.1;
XX = coincident with an Einstein IPC X-ray source;
PN_R = new planetary nebula based on radio detection of IRAS color-selected
sources and listed in the catalog of Ratag et al. 1990;
PN_P = new planetary nebula based on radio detection of IRAS color-selected
sources and listed in the catalog of Pottasch et al. 1988;
SN = source lies within the confines of a supernova remnant;
SS = source coincident with a bright star;
HIIC = source with HII region colors but either a known PN or with
S(60µm)<80Jy;
PNC = source with PN region colors but S(60µm)≫80Jy.
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History:
* 03-Mar-1994:
The files were provided courtesy R.H. Becker to H. Andernach. It was
numbered R105 in H.A.'s "List of Astronomical Catalogues and Documents not
available from NASA-ADC but kindly provided on request by various authors".
The electronic version contained 28 more sources (1485) than the published
one (1457), but did not contain the comment column.
* 28-Oct-1998: ReadMe modified by James E. Gass [SSDOO/ADC]
* 21-May-2015: the "Notes" column was added at CDS from the printed
publication (most notes were missing in the original electronic version).
A systematic comparison of the 2 printed and electronic versions was
performed, and the column "f_Name" was added in table3 to report the
differences [see the Note (3) above]: on the 1457 printed sources,
1453 are in both versions, 3 were missing in the electronic version,
one has a slightly different name (21.504-0.883 vs 21.505-0.881), and
31 do not exist in the printed table.
(End) Heinz Andernach, Francois Ochsenbein [CDS] 21-May-2015