J/ApJS/117/361 PNe in NRAO VLA Sky Survey (Condon+ 1998)
Planetary nebulae in the NRAO VLA sky survey
Condon J.J., Kaplan D.L.
<Astrophys. J. Suppl. Ser. 117, 361 (1998)>
=1998ApJS..117..361C 1998ApJS..117..361C (SIMBAD/NED BibCode)
ADC_Keywords: Planetary nebulae ; Radio lines
Keywords: catalogs - dust, extinction - planetary nebulae: general -
radio continuum: ISM - surveys
Abstract:
The 1.4GHz NRAO VLA Sky Survey (NVSS) images and source catalog were
used to detect radio emission from the 885 planetary nebulae north of
J2000 declination δ=-40° in the Strasbourg-ESO Catalogue of
Galactic Planetary Nebulae (Cat. V/84). We identified 680 radio
sources brighter than about S=2.5mJy/beam (equivalent to T∼0.8K in the
45" FWHM NVSS beam) with planetary nebulae by coincidence with
accurate optical positions measured from Digitized Sky Survey (DSS)
images. Total extinction coefficients c at λ=4861Å were
calculated for the 429 planetary nebulae with available Hβ fluxes
and low free-free optical depths at 1.4GHz. The variation of c with
Galactic latitude and longitude is consistent with the extinction
being primarily interstellar and not intrinsic.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 122 885 Optical and radio data
notes.dat 80 161 Individual notes
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See also:
V/84 : Strasbourg-ESO Catalogue of Galactic Planetary Nebulae (Acker+, 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- PNG IAU name (PN G)
12- 13 I2 h RAh ? Optical right ascension (B1950)
15- 16 I2 min RAm ? Optical right ascension (B1950)
18- 21 F4.1 s RAs ? Optical right ascension (B1950)
23 A1 --- DE- Optical declination sign (B1950)
24- 25 I2 deg DEd ? Optical declination (B1950)
27- 28 I2 arcmin DEm ? Optical declination (B1950)
30- 31 I2 arcsec DEs ? Optical declination (B1950)
33- 34 I2 h RA2h ? Optical right ascension (J2000)
36- 37 I2 min RA2m ? Optical right ascension (J2000)
39- 42 F4.1 s RA2s ? Optical right ascension (J2000)
44 A1 --- DE2- Optical declination sign (J2000)
45- 46 I2 deg DE2d ? Optical declination (J2000)
48- 49 I2 arcmin DE2m ? Optical declination (J2000)
51- 52 I2 arcsec DE2s ? Optical declination (J2000)
54- 55 I2 arcsec e_Pos ? Optical position uncertainty
57- 58 I2 h RArh ? Radio right ascension (J2000)
60- 61 I2 min RArm ? Radio right ascension (J2000)
63- 67 F5.2 s RArs ? Radio right ascension (J2000)
69- 72 F4.2 arcsec e_RArs ? rms uncertainty on RAr
74 A1 --- DEr- Radio declination sign (J2000)
75- 76 I2 deg DErd ? Radio declination (J2000)
78- 79 I2 arcmin DErm ? Radio declination (J2000)
81- 84 F4.1 arcsec DErs ? Radio declination (J2000)
86- 89 F4.1 arcsec e_DErs ? rms uncertainty on DEr
91 A1 --- l_S [~<>] Limit flag on S
92- 97 F6.1 mJy S ? 1.4GHz flux-density peak
99-103 F5.1 mJy e_S ? rms uncertainty on S
105-109 F5.1 arcsec PhiM ? Deconvolved Gaussian FWHM major axis
111 A1 --- l_Phim Limit flag on Phim
112-115 F4.1 arcsec Phim ? Deconvolved Gaussian FWHM minor axis
117-120 F4.1 --- c ? Total Hβ extinction coefficient (1)
122 A1 --- Note [*BCE] Notes (2)
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Note (1): c = log[Fc(Hbeta)/F(Hbeta)],
where Fc(Hbeta) is the Hbeta flux corrected for extinction
Note (2): B: blanked radio image
C: confused radio source
E: very extended nebula whose flux density could not be measured
*: individual note in notes.dat file
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- PNG IAU name (PN G)
16- 80 A65 --- Note Text of the note
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History: From ApJS electronic version
(End) James Marcout, Patricia Bauer [CDS] 25-Sep-1998