Texas ivo://nasa.heasarc/texas NASA/GSFC HEASARC Douglas et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This catalog is from the Texas Survey of discrete radio sources between -35.5 degrees and +71.5 degrees declination (B1950), which was carried out at a frequency of 365 MHz (82 cm wavelength) with the Texas Interferometer during the period from 1974 to 1983. The Survey lists accurate positions with internal errors of about an arcsecond, flux densities (which for strong point sources have internal errors of about 1% and total errors of about 5%), simple structure models and indications of spectrum and variability for 66841 sources. Results of comparisons with other data show that the Survey is 90% complete at 0.4 Jy and 80% complete at 0.25 Jy, is nearly free from spurious sources, and has a lobeshift incidence which is reasonably described by quality flags associated with each source. The University of Texas Radio Astronomy Observatory (UTRAO) carried out, with the Texas Interferometer, this 365 MHz survey of the sky, which was intended to be complete to a flux density level of 0.25 Jy, to provide positions with an accuracy of about 1 arcsec in both coordinates, to give accurate flux densities and indication of source variability, and to give rough structure models for each source. The observations began in 1974 and were completed in 1983. A preliminary version of one declination strip was published (Douglas et al., Publ. Dept. Astron. Univ. Texas, No. 17, Oct. 1980), and a number of intermediate versions of the survey were privately circulated for various purposes, pending completion of the final analysis and adjustment of the data. This database was created by the HEASARC in February 2001, based on CDS/ADC catalog VIII/42. This is a service provided by NASA HEASARC . 1996AJ....111.1945D https://heasarc.gsfc.nasa.gov/W3Browse/all/texas.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=texas& GET text/xml 180 99999 true 254.54098311 -35.71249533 0.0833333333333333 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=texas GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_texas&Action=More+Options&Action=Parameter+Search&ConeAdd=1 RADIO CATALOG 0.0833333333333333 Radio public texas Texas Survey of Radio Sources at 365 MHz name Catalog Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable flux_82_cm 365-MHz Flux Density mJy int nullable flux_82_cm_error Internal RMS Error in Flux Density mJy short nullable model_type Structure Model Type [PAD ] char nullable asymmetry Asymmetry Parameter for AD Model (%) percent short nullable lii Galactic Longitude degree pos.galactic.lon double nullable flux_chi2_res Chi^2 Flux Residual, 2 dof float nullable spectral_index_error Error in Spectral Index stat.error;spect.index float nullable low_flux_flag Flag if Flux < 0.15 Jy [X] char nullable ra_overlap_zone Right Ascension Overlap Zone [ABCDE] char nullable dec_overlap_zone Declination Overlap Zone [ABCDEFGHIJK] char nullable source_strip Observation strip from which source line was taken char nullable snr_flag Signal-to-Noise Flag [XYZ] char nullable dec_error Declination Error (1950) arcsec stat.error;pos.eq.dec;meta.main float nullable lobe2_offset_dec Second Most Likely Dec. Lobe short nullable ra_error Right Ascension Error (1950) arcsec stat.error;pos.eq.ra;meta.main float nullable comp_separation_error Error in Component Separation (arcsec) arcsec short nullable strip Main Strip [A-J] char nullable comp_separation Component Separation in Double Model (arcsec) arcsec short nullable lobe2_offset_ra Second Most Likely R.A. Lobe short nullable dec_overlap_flag Declination Overlap Zone Flag char nullable low_vis_flag Number of Low-Visibility Subbeams short nullable ra_overlap_flag Right Ascension Overlap Zone Flag char nullable position_angle_error Error in Position Angle (degrees) degree stat.error;pos.posAng short nullable lobe_flag Lobeshift Probability Flag [+CW] char nullable environ_flag Influence of Environment Flag [+CWX] char nullable flux_chi2_res_susp Flag means value of Chi^2 is suspect [X] char nullable position_angle Position Angle of Double (degrees) degree pos.posAng short nullable model_flag Goodness of Model Fit Flag [+CWN] char nullable spectral_index Spectral Index spect.index float nullable var_flag Source Variability Flag char nullable simple_flag Simpler Model(s) Exist Flag char nullable asymmetry_error 100 x Error in Asymmetry Parameter (%) percent short nullable bii Galactic Latitude degree pos.galactic.lat double nullable xpvr_flag Number of Subbeams Outside the PVR short nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable