J/ApJS/80/137 J/ApJS/80/137 Southern Extragalactic Radio Sources P A Jones W B McAdam Astrophys. J. Suppl. Ser. 80 137 1992 1992ApJS...80..137J Galaxies, radio Radio sources Surveys galaxies: distances and redshifts galaxies: photometry radio continuum: galaxies surveys techniques: interferometric This catalog contains a list of 384 extragalactic radio sources south of declination -30{deg} which have been imaged with the Molonglo Observatory Synthesis Telescope (MOST) at 843 MHz with a HPBW of 44" x 44" cosec(dec). The sample includes those sources noted in the Molonglo Reference Catalog (MRC) (Cat.<VIII/16>) as extended (larger than 1'), as well as those noted as multiple (within 8' of another ssource and possibly related). The sample is representative of the strong extended extragalactic radio sources of the southern sky, but is not statistically complete. Positions, flux densities, and sizes are given for all sources, and those sources which have been confirmed as extended MRC sources are flagged. In addition, optical positions, magnitudes, redshifts, and identifications are given for 201 of the sources. These data were originally published in two tables which have been merged in this version.

Cflag Confirmation Flag for MRC Extended Source Sample number=1 This column is marked with a 'C' if the source is a member of the Confirmed MRC Extended Sample. Sources in this study were selected from the MRC if they were extended, slightly extended, complex, or multiple sources. Those sources which have angular size larger than 0.5' and flux density greater than 0.4 Jy at 843 MHz are considered confirmed as extended radio sources. The confirmed sample is not complete to the limits of these criteria, however, because the flagging procedures in the MRC (Large et al. 1981MNRAS.194..693L) were conservative. --- Name Name of source, followed by source flags number=2 This column gives the name of the source, comprised of the hours and minutes of right ascension, the sign of the declination, the degrees, to the nearest tenth of a degree. In addition, a capital letter is appended to the name to distinguish components. The following source flags may also be appended to the source name: * Single source which has multiple listings in the MRC. c Two or three sources that are combined in one MRC listing. N Nearby source, listed in MRC but not flagged. n Nearby source, not listed in MRC. --- f_Name Source flag number=2 This column gives the name of the source, comprised of the hours and minutes of right ascension, the sign of the declination, the degrees, to the nearest tenth of a degree. In addition, a capital letter is appended to the name to distinguish components. The following source flags may also be appended to the source name: * Single source which has multiple listings in the MRC. c Two or three sources that are combined in one MRC listing. N Nearby source, listed in MRC but not flagged. n Nearby source, not listed in MRC. --- S843 Integrated flux density at 843 MHz, in Jy number=3 This column gives the integrated flux density of the source at 843 MHz, in Jy. The integrated flux densities have an rms uncertainty of +/- 9%, of which 6% arises from the calibration of the observations and 7% from the integration. The results were checked against previously published data, and systematic errors were estimated to be less than 5% in flux density (including uncertainty in the absolute flux density scale). Jy RAh Right Ascension (B1950) (hour) number=4 These columns give the B1950 right ascension and declination of the centroid position. These positions have an accuracy of 1.6" in right ascension and 2.2" cosec(dec) in declination. h RAm Right Ascension (B1950) (min) min RAs Right Ascension (B1950) (sec) s DE- Declination sign (B1950) number=4 These columns give the B1950 right ascension and declination of the centroid position. These positions have an accuracy of 1.6" in right ascension and 2.2" cosec(dec) in declination. --- DEd Declination (B1950) (deg) deg DEm Declination (B1950) (arcmin) arcmin DEs Declination (B1950) (arcsec) arcsec f_Size Size flag for the source number=5 These columns give the size flag, angular size (in arcmin) and position angle (in degrees) of the source. The angular size is to be understood according to the size flag as follows: d Separation of peaks in a double source. e Largest separation of peaks in a complex source. l Largest size of low-brightness emission in a complex sources. m Deconvolved extent along axis of source. s Largest separation of centroids of nearby sources. In this case, the size is the distance between components which may be matched by examination of the source names. The position angle (north through east) of the peak separation or deconvolved major axis is given except for a few curved sources where the quoted position angle refers to the axis of the central region. --- Size Angular size of the source number=5 These columns give the size flag, angular size (in arcmin) and position angle (in degrees) of the source. The angular size is to be understood according to the size flag as follows: d Separation of peaks in a double source. e Largest separation of peaks in a complex source. l Largest size of low-brightness emission in a complex sources. m Deconvolved extent along axis of source. s Largest separation of centroids of nearby sources. In this case, the size is the distance between components which may be matched by examination of the source names. The position angle (north through east) of the peak separation or deconvolved major axis is given except for a few curved sources where the quoted position angle refers to the axis of the central region. arcmin PA Position angle of source number=5 These columns give the size flag, angular size (in arcmin) and position angle (in degrees) of the source. The angular size is to be understood according to the size flag as follows: d Separation of peaks in a double source. e Largest separation of peaks in a complex source. l Largest size of low-brightness emission in a complex sources. m Deconvolved extent along axis of source. s Largest separation of centroids of nearby sources. In this case, the size is the distance between components which may be matched by examination of the source names. The position angle (north through east) of the peak separation or deconvolved major axis is given except for a few curved sources where the quoted position angle refers to the axis of the central region. deg nearflg '*' if nearby source and flux is combined number=6 This column is flagged with an asterisk ('*') if there is a nearby source to which the angular size refers. In these cases, the size was often listed for multiple components in the published version, grouped together with brackets. Pairs of sources were also sometimes given angular sizes for both the separation of centroids and the separation of peaks in a double. Components may be matched by examination of the source names. --- newflg 'n' if optical info is new identification number=7 This column is flagged with an 'n' if the optical identification is new in this survey. --- RAoh Right Ascension (B1950) (hour) number=8 These columns give the B1950 optical right ascension and declination of the source. Film copies of the UK Schmidt IIIaJ survey were searched for optical identifications. Optical positions were measured with a two-coordinate measuring machine, using nearby reference stars from the SAO and Cape star catalogs (Hunstead 1971MNRAS.152..277H). The plate parameters were determined by a least-squares six-parameter fit to the reference stars to give optical positions with an estimated accuracy of 0.5" in each coordinate. h RAom Right Ascension (B1950) (min) min RAos Right Ascension (B1950) (sec) s DEo- Declination sign (B1950) number=8 These columns give the B1950 optical right ascension and declination of the source. Film copies of the UK Schmidt IIIaJ survey were searched for optical identifications. Optical positions were measured with a two-coordinate measuring machine, using nearby reference stars from the SAO and Cape star catalogs (Hunstead 1971MNRAS.152..277H). The plate parameters were determined by a least-squares six-parameter fit to the reference stars to give optical positions with an estimated accuracy of 0.5" in each coordinate. --- DEod Declination (B1950) (deg) deg DEom Declination (B1950) (arcmin) arcmin DEos Declination (B1950) (arcsec) arcsec Bmag Magnitude of source number=9 The mag column gives the magnitude (b_J_) of the possible optical identifications, estimated to the nearest 0.5 magnitude by comparison of Polaroid enlargements of the Schmidt prints with reference images of galaxies and stars of known magnitude. The reference galaxies were from the lists of Carter (1980MNRAS.190..307C) and Dickens, Currie, and Lucey (1986MNRAS.220..679D), while the stars were from Hawkins (1979, 1981MNRAS.194.1013H). The reference magnitudes were corrected to the survey color using the equation b_J_ = B - 0.23(B - V) (Shanks et al., 1984MNRAS.206..767S). For unresolved radio sources, the search radius for galaxies and stellar objects was 5.6", which is approximately twice the combined radio and optical position errors. mag ID Optical identification of source number=10 Optical identifications are given in the 'ID' column. Galaxies were accepted as identifications of the extended radio sources if the projected optical-radio centroid offsets were less than 50 kpc. The distance was estimated by assuming an absolute magnitude M of -21.0 and making corrections to the apparent magnitude for absorption and redshift. If more than one galaxy satisfied the 50 kpc criterion, the brightest galaxy was chosen. A few identifications were accepted for sources having offsets greater than 50 kpc when there was other evidence supporting the identification (for example, a radio core coincident with the optical object). The following symbols are used: st Stellar image, probably a QSO Q Confirmed QSO BL Confirmed BL Lac object. db Double galaxy (see mult_flg below) --- z Redshift of source number=11 The redshift is given in the z column. Fourteen new redshifts were measured using the Anglo-Australian Telescope. These redshifts are flagged with an 'n' in the f_z column. All known redshifts are listed, for completeness. Redshifts have been obtained from the literature, largely from the compilations of Veron-Cetty and Veron (1983A&AS...53..219V) and Palumbo, Tanzella-Nitti, and Vettolani (1983). The original references are quoted except for three objects with many redshift measurements where the weighted average from Palumbo et al. (1983) was used. ** The redshifts have not been corrected for Galactic rotation. --- f_z 'n' if redshift is new number=11 The redshift is given in the z column. Fourteen new redshifts were measured using the Anglo-Australian Telescope. These redshifts are flagged with an 'n' in the f_z column. All known redshifts are listed, for completeness. Redshifts have been obtained from the literature, largely from the compilations of Veron-Cetty and Veron (1983A&AS...53..219V) and Palumbo, Tanzella-Nitti, and Vettolani (1983). The original references are quoted except for three objects with many redshift measurements where the weighted average from Palumbo et al. (1983) was used. ** The redshifts have not been corrected for Galactic rotation. --- mult_flg '*' if position of another companion is listed below number=12 This column is flagged with an asterisk '*' if the optical identification is a double galaxy and both positions were listed in the published paper. The following second components were given in the published paper: 0618-371 06 18 17.87 -37 10 18.7 0651-603 06 51 16.09 -60 18 28.9 1302-325 13 02 13.07 -32 33 13.4 2130-538 21 30 49.18 -53 51 33.6 2243-529 22 43 13.16 -52 59 17.0 --- Patricio Ortiz CDS 1999Apr06 UNKNOWN UNKNOWN "The catalogue was originally archived as A041 by H. Andernach (heinz@astro.ugto.mx) and the ADS documentation prepared in collaboration with Carolyn Stern Grant (stern@cfa.harvard.edu)." J_ApJS_80_137.xml