VII/149 Positions of high-redshift luminous quasars (Schneider+ 1992) ================================================================================ Accurate positions of 528 High-Redshift, Luminous Quasars from the HST Snap-Shot Survey Schneider D.P., Bahcall J.N., Saxe D.H., Bahcall N.A., Doxsey R., Golombek D., Krist J., McMaster M., Meakes M., Lahav O. ================================================================================ ADC_Keywords: Positional data ; QSOs ; Redshifts ; Surveys Keywords: quasars: positions - quasars: finding charts - quasars Description: The non-proprietary HST Snapshot Survey produced Planetary Camera images of high-redshift, luminous quasars. The aim of the program is to determine the frequency of multiple imaged QSOs down to angular scales of 0.15". Detailed descriptions of the program are given in Bachall et al. (1992ApJ...387...56B) and Maoz et al. (1992ApJ...394...51M). The sample was taken from the 3rd and 4th editions of the catalog of Veron-Cetty and Veron (1987ESOSR...5....1V, 1989ESOSR...7....1V). The target positions taken from these catalogs were fed to GASP, the STSci Guide Star Astrometric Support Program, to generate revised positions from regions extracted from the STSci's digitized sky survey. The printed version of the catalog does not contain the Veron 1950 coordinates nor the difference between these and the GASP derived 1950 coordinates that are contained in this version. Abstract: We present finding charts and J2000 positions accurate to ~1" for the 528 high-redshift (z>1), luminous (M_v_<-25.5) quasars investigated in the Hubble Space Telescope Snapshot Survey. The information was produced with the Space Telescope Science Institute's Astrometric Support Program. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file catalog.dat 124 528 *Positions of luminous and high-z quasars -------------------------------------------------------------------------------- Note on catalog.dat: the columns of the file are different from those of the printed Table 1 of the paper. The file here archived contains position data of the source catalogue (Veron-Cetty and Veron, 3rd and 4th ed.) and their differences from the B1950 positions in this catalog. -------------------------------------------------------------------------------- Byte-per-byte Description of file: catalog.dat -------------------------------------------------------------------------------- Bytes Format Unit Label Explanation -------------------------------------------------------------------------------- 4- 6 I3 --- Frame [0,528]+ frame number for the finding chart 10- 27 A18 --- Name Quasar name 29- 30 I2 h RAh [0,23]+= right ascension (hours) (J2000) 32- 33 I2 min RAm [0,59] right ascension (minutes) 35- 38 F4.1 s RAs [0,60] right ascension (seconds) 41 A1 --- DE- Declination sign (J2000) 42- 43 I2 deg DEd [0,90] declination (degrees) (J2000) 45- 46 I2 arcmin DEm [0,59] declination (minutes) 48- 49 I2 arcsec DEs [0,60] declination (seconds) 50 A1 --- FC [*] '*'= quasar lacking independent finding- chart identification (see paper) 53- 56 F4.1 mag Vmag V magnitude from source catalog (see paper) 59- 63 F5.3 --- z Redshift from source catalog (see paper p678) 67- 68 I2 h RA1950h [0,23] right ascension (hours) (B1950) 70- 71 I2 min RA1950m [0,59] right ascension (minutes) 73- 76 F4.1 s RA1950s [0,60] right ascension (seconds) 79 A1 --- DE1950- [+-]! declination sign 80- 81 I2 deg DE1950d [0,90] declination (degrees) (B1950) 83- 84 I2 arcmin DE1950m [0,59] declination (minutes) 86- 87 I2 arcsec DE1950s [0,60] declination (seconds) 91- 92 I2 h RACATh [0,23] right ascension (hours) of source catalogue (see paper p678) 94- 95 I2 min RACATm [0,59] right ascension (minutes) 97-100 F4.1 s RACATs [0,60] right ascension (seconds) 103 A1 --- DECAT- [+-]! declination sign 104-105 I2 deg DECATd [0,90] declination (degrees) of source catalogue (see paper p678) 107-108 I2 arcmin DECATm [0,59] declination (minutes) 110-111 I2 arcsec DECATs [0,60] declination (seconds) 112 A1 --- OR [*] '*'= a Veron catalogue position accurate to 1 arcsec 115-118 I4 arcsec DRA measured RA - catalogue RA in arcsec, i.e., (RA1950(s)-RACAT(s))*15*cos(DE) 121-124 I4 arcsec DDE measured DE - catalogue DE in arcsec, i.e., DE1950(arcsec) - DECAT(arcsec) -------------------------------------------------------------------------------- History: The catalogue was provided by courtesy of D.P.Schneider to H. Andernach; it was numbered A154 in H. Andernach's "List of Astronomical Catalogues and Documents kindly provided on request by various authors" * 14-Mar-1994: First archived. (The date of the latest archiving, see the date of each file.) ================================================================================ (End) Koichi Nakajima [CDS] 16-Feb-1994