J/A+A/411/391 The AMIGA project. Revised positions for CIG galaxies (Leon+ 2003) ================================================================================ Revised positions for CIG galaxies. Leon S., Verdes-Montenegro L. =2003A&A...411..391L ================================================================================ ADC_Keywords: Positional data; Galaxy catalogs Keywords: surveys - astrometry Abstract: We present revised positions for the 1051 galaxies belonging to the Karachentseva Catalog of Isolated Galaxies (CIG, Cat. ). New positions were calculated by applying SExtractor to the Digitized Sky Survey CIG fields with a spatial resolution of 1.2". We visually checked the results and for 118 galaxies had to recompute the assigned positions due to complex morphologies (e.g. distorted isophotes, undefined nuclei, knotty galaxies) or the presence of bright stars. We found differences between older and newer positions of up to 38" with a mean value of 2.96" relative to SIMBAD and up to 38" and 2.42" respectively relative to UZC (Cat. ). Based on star positions from the APM catalog (Cat. ) we determined that the DSS astrometry of five CIG fields has a mean offset in ({alpha},{delta}) of (-0.90", 0.93") with a dispersion of 0.4". These results have been confirmed using the 2MASS All-Sky Catalog of Point Sources (Cat. ). The intrinsic errors of our method combined with the astrometric ones are of the order of 0.5". File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table1.dat 70 1051 Optical positions of galaxies notes.dat 80 32 Individual notes -------------------------------------------------------------------------------- See also: VII/82 : Catalog of Isolated Galaxies (Karachentseva+ 1973) VII/26 : Uppsala General Catalogue of Galaxies (UGC) (Nilson 1973) Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- --- [CIG] 5- 8 I4 --- CIG CIG number (K73 NNNN in Simbad), Cat. 9 A1 --- n_CIG [*] indicates a note in notes.dat file 13- 14 I2 h RA1h Right ascension (B1950) 16- 17 I2 min RA1m Right ascension (B1950) 19- 23 F5.2 s RA1s Right ascension (B1950) 26 A1 --- DE1- Declination sign (B1950) 27- 28 I2 deg DE1d Declination (B1950) 30- 31 I2 arcmin DE1m Declination (B1950) 33- 36 F4.1 arcsec DE1s Declination (B1950) 41- 42 I2 h RAh Right ascension (J2000) 44- 45 I2 min RAm Right ascension (J2000) 47- 51 F5.2 s RAs Right ascension (J2000) 54 A1 --- DE- Declination sign (J2000) 55- 56 I2 deg DEd Declination (J2000) 58- 59 I2 arcmin DEm Declination (J2000) 61- 64 F4.1 arcsec DEs Declination (J2000) 69- 70 A2 --- sig Detection threshold (sigma) if different of 4; see also note (1) -------------------------------------------------------------------------------- Note (1): The {sigma} threshold used in SExtractor for the source detection is indicated when different from the 4{sigma} value chosen by default. "V" indicates a visual estimation, and "E" identifies the three excluded objects (Local Group members) -------------------------------------------------------------------------------- Byte-by-byte Description of file: notes.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 3 A3 --- --- [CIG] 5- 8 I4 --- CIG CIG number 10- 80 A71 --- Note Text of the note -------------------------------------------------------------------------------- Acknowledgements: Lourdes Verdes Montenegro References: Sulentic et al., Paper II 2006A&A...449..937S Cat. J/A+A/449/937 Lisenfeld et al., Paper III 2007A&A...462..507L, Cat. J/A+A/462/507 Verley et al., Paper IV 2007A&A...470..505V, Cat. J/A+A/470/505 Verley et al., Paper V 2007A&A...472..121V, Cat. J/A+A/472/121 Leon et al., Paper VI 2008A&A...485..475L, Cat. J/A+A/485/475 Sabater et al., Paper VII 2008A&A...486...73S, Cat. J/A+A/486/73 Espada et al., Paper VIII 2011A&A...532A.117E, Cat. J/A+A/532/A117 Lisenfeld et al., Paper IX 2011A&A...534A.102L, Cat. J/A+A/534/A102 Fernandez Lorenzo et al., Paper X 2012A&A...540A..47F, Cat. J/A+A/540/A47 ================================================================================ (End) Patricia Bauer [CDS] 14-Nov-2003