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. =1994ApJS...91..347B (SIMBAD/NED BibCode) ================================================================================ 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{deg}, l=350-40{deg}) 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: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2 114 1355 5 GHz and 1.4GHz sources in the inner Galaxy table4a 83 308 IRAS-selected ultracompact H II regions table4b 83 46 IRAS-selected planetary nebulae table4c 83 37 Other High-probability 6cm/IRAS sources table4d 81 41 Low-probability 6cm/IRAS matches -------------------------------------------------------------------------------- See also: II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986) Byte-by-byte Description of file: table2 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 13 A13 --- Name5GHz 5 GHz 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 Diam5GHz ? Source diameter at 5GHz (2) 54- 55 A2 --- n_Diam5GHz [CD ] CD: the 5GHz source was observed in the CnD configuration 57- 69 A13 --- Name1.4GHz 1.4 GHz name (LLL.lll+B.bbb) 70 A1 --- n_Name1.4GHz [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 Diam1.4GHz ? Source diameter at 1.4GHz (2) 87 A1 --- Mult ["] ": Multiple 1.4GHz sources associated with the 5GHz source 88-117 A30 --- Com Comments (3) -------------------------------------------------------------------------------- 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): 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. ) SNR: Associated with a supernova remnant SNR?, PN?: May be either PN or a SNR TX=fff: Texas 0.365 GHz (Cat. ) source, fff = flux in mJy XR: X-ray source in Einstein IPC catalog int=xxx: Large extended source, xxx = integrated flux in mJy -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4a table4b table4c table4d -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 3- 15 A13 --- GPS 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 12{mu}m 50 A1 --- l_S25um Limit flag on S25um 51- 58 F8.2 mJy S25um Flux density at 25{mu}m 59 A1 --- l_S60um Limit flag on S60um 60- 67 F8.2 mJy S60um Flux density at 60{mu}m 68 A1 --- l_S100um Limit flag on S100um 69- 76 F8.2 mJy S100um Flux density at 100{mu}m 78- 81 F4.1 % Prob Probability 83 A1 --- Type [AC] C: Candidate, A: Ambiguous -------------------------------------------------------------------------------- History: Tables 4a and 4b were provided by R.L. White to H. Andernach (heinz@cuevano.ugto.mx) and archived as R106 in his catalogue collection. Tables 4c and 4d were prepared via OCR and proof-read by H. Andernach. ================================================================================ (End) Heinz Andernach, Francois Ochsenbein [CDS] 25-Apr-1997