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J/AJ/133/2097 FIRST "Winged" and X-shaped radio source candidates (Cheung, 2007)

FIRST "Winged" and X-shaped radio source candidates. Cheung C.C. <Astron. J., 133, 2097-2121 (2007)> =2007AJ....133.2097C
ADC_Keywords: Galaxies, radio ; Photometry, SDSS Keywords: galaxies: active - galaxies: jets - quasars: general - radio continuum: galaxies Abstract: A small number of double-lobed radio galaxies (17 from our own census of the literature) show an additional pair of low surface brightness "wings," thus forming an overall X-shaped appearance. Using the VLA FIRST survey database, we are compiling a large sample of winged and X-shaped radio sources for such studies. As a first step toward this goal, an initial sample of 100 new candidate objects of this type are presented in this paper. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 127 100 Candidate X-shaped Radio Sources from FIRST refs.dat 83 23 References
See also: J/ApJS/181/548 : X-shaped radio sources. II. New redshifts (Cheung+, 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Catalog Number ([C2007] NNN in Simbad) 5- 14 A10 --- [C2007] Source name (JHHMM+DDMM) (1) 16- 17 I2 h RAh Hour of Right Ascension (J2000) 19- 20 I2 min RAm Minute of Right Ascension (J2000) 22- 26 F5.2 s RAs Second of Right Ascension (J2000) 28 A1 --- DE- Sign of the Declination (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 38 F4.1 arcsec DEs Arcsecond of Declination (J2000) 40- 43 F4.1 mag rmag ? The r band magnitude (2) 44 A1 --- f_rmag [*] USNO magnitude (3) 46- 49 F4.1 mag g-r ? SDSS (g-r) color index when available 50 A1 --- f_g-r [*] anomalously large g-r value (4) 52- 56 A5 --- r_rmag Reference of the rmag data, in refs.dat file 58 A1 --- ID [QG] Spectroscopic identification as Q = quasar, G = radio galaxy 61- 66 F6.4 --- z ? Spectroscopic redshift 68- 75 A8 --- r_z Spectroscopic references, in refs.dat file 77- 82 F6.1 mJy S.365 ? Integrated 365MHz TXS survey flux density 84- 87 I4 mJy S1.4 Integrated 1.4GHz NVSS flux density 89- 94 F6.1 mJy S4.9 ? Integrated 4.9GHz flux density 96- 98 A3 --- r_S4.9 Reference for S4.9, in refs.dat file 100-104 F5.2 --- alpha1 ? Spectral index between 365MHz and 1.4GHz 106-109 F4.2 --- alpha2 ? Spectral index between 1.4 and 4.9GHz 111-127 A17 --- OCat Other source and catalogs identifications
Note (1): Based on J2000.0 equinox positions in right ascension and declination. Positions are of the optical counterparts when identified in the SDSS (most widely adopted), USNO, and APM catalogs, or other published works (see r_rmag). When the optical counterparts were not catalogued, less precise positions were estimated directly from the DSS or FIRST images (Figure 4). Note (2): SDSS model magnitudes were preferred whenever available. Note (3): the asterisk (*) indicates a USNO magnitude for this point source obviously extended in the DSS images. Note (4): the asterisk (*) indicates an anomalously large g-r value. Inspection of SDSS data at the five-bands show inconsistent g-band magnitudes in these cases, and more reliable colors are u-r=1.7 (J1247+4646) and 2.2 (J1411+0907).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Ref Reference code 9- 27 A19 --- BibCode BibCode 29- 55 A27 --- Aut Author's name 57- 83 A27 --- Com Comments
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 22-Mar-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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