J/ApJS/91/347 A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)
A 5GHz VLA survey of the galactic plane.
Becker R.H., White R.L., Helfand D.J., Zoonematkermani S.
<Astrophys. J. Suppl. Ser. 91, 347 (1994)>
=1994ApJS...91..347B 1994ApJS...91..347B
ADC_Keywords: Radio sources; H II regions; Planetary nebulae; Infrared sources
Keywords: HII regions - planetary nebulae: general - radio continuum: galaxies -
surveys
Abstract:
We have used the VLA to survey the inner Galaxy (|b|<0.4°,
l=350-40°) at 5GHz to a limiting sensitivity of between 2.5 and
10mJy. The survey has resulted in a catalog of 1272 discrete sources
(including 100 sources outside the formal survey area) of which we
have tentatively identified ∼450 as ultracompact H II regions and ∼45
as planetary nebulae. Approximately 30% of the radio sources are
detected in the IRAS Point Source Catalog. The results confirm a scale
height of only 30pc for ultracompact H II regions. We show that source
lists generated from the IRAS Point Source Catalog alone suffer
serious effects; the combination of the IRAS and radio surveys allows
us to produce a much more complete census of the regions of massive
star formation in our Galaxy.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 114 1355 5 GHz and 1.4GHz sources in the inner Galaxy
table4a.dat 83 308 IRAS-selected ultracompact H II regions
table4b.dat 83 46 IRAS-selected planetary nebulae
table4c.dat 83 37 Other High-probability 6cm/IRAS sources
table4d.dat 81 41 Low-probability 6cm/IRAS matches
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
J/ApJS/74/181 : Small-diameter radiosources catalogue (Zoonematkermani+, 1990)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- GPS5 5GHz name (LLL.lll+B.bbb)
15- 16 I2 h RAh Right ascension (1950) at 5GHz
17- 18 I2 min RAm Right ascension (1950) at 5GHz
19- 23 F5.2 s RAs Right ascension (1950 at 5GHz
24 A1 --- DE- Declination sign
25- 26 I2 deg DEd Declination (1950) at 5GHz
27- 28 I2 arcmin DEm Declination (1950) at 5GHz
29- 32 F4.1 arcsec DEs Declination (1950) at 5GHz
34 A1 --- l_Sp5GHz Limit flag on Sp5GHz
35- 40 F6.1 mJy Sp5GHz Peak flux density at 5GHz (1)
42 A1 --- l_Si5GHz Limit flag on Si5GHz
43- 48 F6.1 mJy Si5GHz ? Integrated flux density at 5GHz (1)
50- 53 F4.1 arcsec D5GHz ? Source diameter at 5GHz (2)
54- 55 A2 --- n_D5GHz [CD ] CD: the 5GHz source was observed in
the CnD configuration
57- 69 A13 --- GPS1.4 1.4GHz name (LLL.lll+B.bbb)A, from
Zoonematkermani et al. 1990, J/ApJS/74/181
70 A1 --- n_GPS1.4 [N] N: new source (Not in 1.4GHz catalog)
72- 74 I3 mJy Sp1.4GHz Peak flux density at 1.4GHz (1)
76- 79 I4 mJy Si1.4GHz ? Integrated flux density at 1.4GHz (1)
80 A1 --- n_Si1.4GHz [+] +: the flux was measured using IMEAN
82- 85 F4.1 arcsec D1.4GHz ? Source diameter at 1.4GHz (2)
87 A1 --- Mult ": Multiple 1.4GHz sources associated
with the 5GHz source
88-117 A30 --- Com Comments (3)
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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.
Note (3): the abbreviations used are:
I = Has a likely counterpart in the IRAS PSC
i = Has a low probability IRAS PSC match
* = Source is part of a group, integrated flux includes another
nearby source (also marked with *)
MLNSO(name) = Master List of Non-Stellar Objects
PN l+b = Strasbourg Catalog of Planetary Nebulae (Cat. V/84)
SNR = Associated with a supernova remnant
SNR?, PN? = May be either PN or a SNR
TX=fff = Texas 0.365 GHz (Cat. VIII/42) source, fff = flux in mJy
XR = X-ray source in Einstein IPC catalog
int=xxx = Large extended source, xxx = integrated flux in mJy
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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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3- 15 A13 --- GPS5 GPS name
17- 22 F6.1 mJy S6cm Flux density at 6 cm (5GHz)
24- 27 F4.1 arcmin Diam Source diameter
29- 38 A10 --- IRAS IRAS name
39- 40 A2 --- m_IRAS Multiplicity index on IRAS
41 A1 --- l_S12um Limit flag on S12um
42- 49 F8.2 mJy S12um Flux density at 12µm
50 A1 --- l_S25um Limit flag on S25um
51- 58 F8.2 mJy S25um Flux density at 25µm
59 A1 --- l_S60um Limit flag on S60um
60- 67 F8.2 mJy S60um Flux density at 60µm
68 A1 --- l_S100um Limit flag on S100um
69- 76 F8.2 mJy S100um Flux density at 100µm
78- 81 F4.1 % Prob Probability of association being real
83 A1 --- Type [AC] C: Candidate, A: Ambiguous
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History:
Tables 4a and 4b were provided by R.L. White to H. Andernach
() and archived as R106 in his catalogue
collection. Tables 4c and 4d were prepared via OCR and proof-read
by H. Andernach.
* 29-Jul-2003: the units or the source diameter in tables 4 were
corrected (indicated erroneously as arcmin instead of arcsec)
* 01-Jun-2005: the Name (at 5GHz) in table2 was transformed to comply
to IAU standards on designation (leading blanks replaced by zeroes)
* 03-Sep-2009: in table2, the 1.4GHz name (20cm) was also transformed
to comply to IAU standards on designation (leading zeroes)
(End) Heinz Andernach, Francois Ochsenbein [CDS] 25-Apr-1997