J/ApJS/155/89 325MHz radio survey in M31 (Gelfand+, 2004)
A wide-field, low-frequency radio survey of the field of M31.
I. Construction and statistical analysis of the source catalog.
Gelfand J.D., Lazio T.J.W., Gaensler B.M.
<Astrophys. J. Suppl. Ser., 155, 89-100 (2004)>
=2004ApJS..155...89G 2004ApJS..155...89G
ADC_Keywords: Surveys ; Radio continuum ; Radio sources
Keywords: catalogs - galaxies: individual (M31) - radio continuum: galaxies -
radio continuum: general
Abstract:
We present here the results of a 325MHz radio survey of M31, conducted
with the A configuration of the Very Large Array. The survey covered
an area of 7.6°2, and a total of 405 radio sources between ≲6"
and 170" in extent were mapped with a resolution of 6" and a 1σ
sensitivity of ∼0.6mJy/beam. For each source, its morphological class,
major axis θM, minor axis θm, position angle
θPA, peak flux I, integrated flux density S, spectral index
α, and spectral curvature parameter φ were calculated.
Description:
This paper is the result of a 5hr (4hr on-source) observation of M31
conducted on 2000 December 15 with the VLA A configuration.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 148 405 GLG source list
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See also:
J/A+AS/61/451 : The 37W catalogue of radio sources in M31 (Walterbos+ 1985)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [GLG]
4- 6 I3 --- GLG Source name (1)
8- 10 A3 --- Type Morphological category (2)
12- 13 I2 h RAh Hour of Right Ascension (J2000)
15- 16 I2 min RAm Minute of Right Ascension (J2000)
18- 22 F5.2 s RAs Second of Right Ascension (J2000)
24- 27 F4.2 arcsec e_RAs Error in RAs
29 A1 --- DE- Sign of the Declination (J2000)
30- 31 I2 deg DEd Degree of Declination (J2000)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000)
36- 40 F5.2 arcsec DEs Arcsecond of Declination (J2000)
42- 45 F4.2 arcsec e_DEs Error in DEs
47- 50 F4.1 arcmin Theta Angular distance from the center of M31
52- 55 F4.1 kpc Rad Projected radius of source in M31 (3)
57- 60 F4.1 arcsec MajAxis Source major axis
62- 65 F4.1 arcsec e_MajAxis Error in MajAxis
67- 70 F4.1 arcsec MinAxis Source minor axis
72- 75 F4.1 arcsec e_MinAxis Error in MinAxis
77- 79 I3 deg PA [-90,90] Position Angle (4)
81- 84 I4 deg e_PA Error in PA
86- 92 F7.2 mJy I325MHz Peak brightness at 325MHz in units of mJy/beam
94- 99 F6.2 mJy e_I325MHz Error in I325MHz
101-107 F7.2 mJy S325MHz Integrated flux density at 325MHz
109-114 F6.2 mJy e_S325MHz Error in S325MHz
116-120 F5.2 mJy RMS RMS of the flux density around the source
122-125 A4 --- l_Sp+Index [≤] Limit flag on Sp+Index
126-130 F5.2 --- Sp+Index ? Radio spectral index (5)
132-135 F4.2 --- e_Sp+Index ? Error in Sp+Index
137-141 F5.2 --- phi ? Spectral curvature parameter (5)
143-146 F4.2 --- e_phi ? Error in phi
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Note (1): In increasing distance from the center of the FOV.
Note (2): Morphological category, defined as follows:
U = unresolved;
El = elongated;
C = complex;
Ex = extended;
ExG = Extended source with a counterpart in one or more other radio
surveys of M31.
Note (3): Projected radius of source in M31 defined in Section 4.1.
Note (4): Position angle North through East of the source.
Note (5): As calculated in Section 4.3.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 09-May-2005