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.
<Publ. Astron. Soc. Pac. 104, 678 (1992)>
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 1992ApJ...387...56B) and Maoz et al.
(1992ApJ...394...51M 1992ApJ...394...51M). The sample was taken from the 3rd and 4th
editions of the catalog of Veron-Cetty and Veron (1987ESOSR...5....1V 1987ESOSR...5....1V,
1989ESOSR...7....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 (Mv←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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
catalog.dat 124 528 *Positions of luminous and high-z quasars
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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.
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Byte-per-byte Description of file: catalog.dat
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Bytes Format Unit Label Explanation
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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)
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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