J/other/BSAO/50.115 IRAS-TEXAS cross-identifications (Verkhodanov+, 2000)
Searching out and studying sources of low-frequency radio emission
near infrared objects.
Verkhodanov O.V., Trushkin S.A.
<Bull. Special Astrophys. Obs., 50, 115 (2000)>
=2000BSAO...50..115V 2000BSAO...50..115V
ADC_Keywords: Radio sources ; Infrared sources ; Cross identifications
Keywords: radio sources: general - infrared emission
Abstract:
A procedure of sampling objects by way of cross-identification of the
low-frequency radio catalogue of objects obtained with the aid of the
Texas interferometer at the frequency 365MHz and of the IRAS (Cat.
II/125) catalogue is discussed. Statistical properties of different
subsamples of sources are investigated. From the results of
cross-identification with the radio catalogues of the database CATS
(Verkhodanov et al., 1997BaltA...6..275V 1997BaltA...6..275V), continuous radio spectra of
objects are plotted, identification with optical and X-ray catalogues
is carried out. From the steep spectrum objects sources are selected
for further studies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 232 495 The list of IRAS-TEXAS Association (ITA)
radio identified sources
table2.dat 99 31 ITA objects having inverse spectrum
table3.dat 106 130 ITA objects having ultra steep spectrum
table4.dat 119 165 Result of search for optical counterparts with
in a radius of 10" in CATS optical catalogs
table5.dat 53 80 Result of search for X-ray counterparts with
in a radius of 60" in CATS optical catalogs
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC, 1986)
II/126 : IRAS Serendipitous Survey Catalog (IPAC, 1986)
II/156 : IRAS Faint Source Catalog, |b|>10, Version 2.0 (Moshir+, 1989)
VIII/42 : Texas Survey of radio sources at 365MHz (Douglas+, 1996)
J/ApJS/82/1 : Optical identification of Texas radio sources (Bozyan, 1992)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- TXS Name of the source in TEXAS catalog
11- 25 A15 --- IRAS Name of the source in IRAS catalog
27- 28 I2 h RAh TXS and IRAS right ascension (B1950)
29- 30 I2 min RAm TXS and IRAS right ascension (B1950)
31- 36 F6.3 s RAs TXS right ascension (B1950)
37 A1 --- DE- TXS declination sign (B1950)
38- 39 I2 deg DEd TXS and IRAS declination (B1950)
40- 41 I2 arcmin DEm TXS declination (B1950)
42- 46 F5.2 arcsec DEs TXS declination (B1950)
48- 49 I2 h RA2h IRAS right ascension (B1950)
50- 51 I2 min RA2m IRAS right ascension (B1950)
52- 55 F4.1 s RA2s IRAS right ascension (B1950)
56 A1 --- DE2- IRAS declination sign (B1950)
57- 58 I2 deg DE2d IRAS declination (B1950)
59- 60 I2 arcmin DE2m IRAS declination (B1950)
61- 62 I2 arcsec DE2s IRAS declination (B1950)
65- 68 F4.1 arcsec Dist Distance between TXS and IR coordinates
70- 75 F6.2 deg GLON Galactic latitude
77- 82 F6.2 deg GLAT Galactic longitude
83 A1 --- l_S365MHz Limit flag on S365MHz
84- 88 I5 mJy S365MHz Flux density at 365MHz
90 A1 --- l_S12um Limit flag on S12um
91-100 F10.5 Jy S12um Flux density at 12µm
102 A1 --- l_S25um Limit flag on S25um
103-112 F10.5 Jy S25um Flux density at 25µm
114 A1 --- l_S60um Limit flag on S60um
115-125 F11.5 Jy S60um Flux density at 60µm
127 A1 --- l_S100um Limit flag on S100um
128-139 F12.4 Jy S100um Flux density at 100µm
141-145 F5.2 --- SI.1 ? Spectral index at 365MHz (G1)
147-151 F5.2 --- SI.2 ? Spectral index at 1400MHz (G1)
152-158 F7.3 [Jy] A ? Coefficient of spectrum approximation (1)
160-166 F7.3 --- B ? Coefficient of spectrum approximation (1)
167 A1 --- --- [x]
169-175 F7.3 --- C ? Coefficient of spectrum approximation (1)
176-180 A5 --- f(x) [x2e-^ ] Formula of spectrum approximation (1)
182-232 A51 --- XID Possible cross-identifications
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Note (1): The formula of approximation of the spectrum is
y = A + Bx + Cf(x)
where x=logν ν is the frequency in MHz,
y = logS, S is the flux density in Jy,
and f(x) can represent x2, ex (=exp(x)) or e-x (=exp(-x))
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Byte-by-byte Description of file: table2.dat table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- TXS TXS name
12- 15 I4 mJy S365MHz Flux density at 365MHz
17- 21 F5.2 --- SI.1 ? Spectral index at 365MHz (G1)
23- 27 F5.2 --- SI.2 ? Spectral index at 1400MHz (G1)
30- 31 I2 h RAh TXS right ascension (B1950)
33- 34 I2 min RAm TXS right ascension (B1950)
36- 41 F6.3 s RAs TXS right ascension (B1950)
43 A1 --- DE- TXS declination sign (B1950)
44- 45 I2 deg DEd TXS declination (B1950)
47- 48 I2 arcmin DEm TXS declination (B1950)
50- 54 F5.2 arcsec DEs TXS declination (B1950)
56- 69 A14 --- IRAS IRAS name
71- 78 F8.4 deg Glat Galactic latitude
80-106 A27 --- XID Identification
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- TXS TXS name
12-119 A108 --- Opt Optical counterparts
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Global notes:
Note (G1): Spectral index calculated as the inclination of the tangent
to the radio spectrum at the given point, in the sense
S(ν)∝ν-SI
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 27-Jun-2003