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LBQS - Large Bright Quasar Survey |
HEASARC Archive |
Compared to the discovery papers (references below), 12 quasars that are either fainter than the field magnitude limit or fall outside the final survey area have been deleted, 12 quasars that were discovered subsequent to paper V have been added, 10 redshifts have been corrected, and 13 quasars with either incorrect or degenerate designations (LBQS names) have had their designations corrected.
The information in this version of the LBQS Catalog is the same as in Table 4 of the published paper with the following exceptions: (i) the object 0021-0213 has a redshift of 2.348; this value was listed in Table 5 of the paper but was not incorporated in Table 4 of the paper; (ii) the parameter 'Reference' in Table 4 of the published paper (which specified in which paper in the LBQS series the quasar spectrum could be found) has been omitted; and (iii) the parameter 'Notes' in Table 4 of the published paper had two non-blank values: '+' and 'a'; in the HEASARC representation of this catalog we have replaced the Notes value of '+' by 'C', and dropped the Notes value of 'a' (used to indicate objects that had been listed as AGN in earlier papers).
Paper I: Foltz et al. =1987AJ.....94.1423F Paper II: Foltz et al. =1989AJ.....98.1959F Paper III: Hewett et al. =1991AJ....101.1121H Paper IV: Chaffee et al. =1991AJ....102..461C Paper V: Morris et al. =1991AJ....102.1627M
Name
A source designation that comprises the string 'LBQS ', a nine
character string made up from the Equinox B1950 coordinates, and a suffix A
and B added to resolve degeneracies in the naming convention for some
of the entries.
RA
The right ascension in the specified equinox. The original catalog, as
published in AJ, gave 2 types of positions for each entry, corresponding to
Equinoxes B1950 and J2000, to a precision of 0.01 seconds of time (RA) and
0.1 arcseconds (Dec). For the Browse version of this catalog, the HEASARC used
the B1950 positions to populate RA and Dec and so, to retain the full original
accuracy, the user should select Equinox 1950 in Browse using the command
"cey 1950". For the W3Browse version of this catalog, the HEASARC used the
J2000 positions to populate RA and Dec and so, to retain the full original
accuracy, the user should select Equinox 2000 in W3Browse.
Dec
The declination in the specified equinox. The original catalog, as
published in AJ, gave 2 types of positions for each entry, corresponding to
Equinoxes B1950 and J2000, to a precision of 0.01 seconds of time (RA) and
0.1 arcseconds (Dec). For the Browse version of this catalog, the HEASARC used
the B1950 positions to populate RA and Dec and so, to retain the full original
accuracy, the user should select Equinox 1950 in Browse using the command
"cey 1950". For the W3Browse version of this catalog, the HEASARC used the
J2000 positions to populate RA and Dec and so, to retain the full original
accuracy, the user should select Equinox 2000 in W3Browse.
LII
Galactic longitude of the quasar.
BII
Galactic latitude of the quasar.
Redshift
The redshift of the quasar.
Bjmag
The apparent magnitude of the quasar as measured on the UKST direct
plate in the B_j band. The B_j band is defined by the response function of
the hypersensitized Kodak IIIa-J emulsion combined with a Schott GG395 filter.
Field_Info
The LBQS UKST field in which the quasar resides, as defined in
Table 1 of the published catalog which descibed the direct and objective-prism
plate material for each field as follows:
Field Plate Filter Exp. Date (UT) Grade Seeing Direct / Prism min " F823 00 00 +00 00 J7940 GG395 60 27 Jul 1982 A2 2.5 UJ6543P NONE 45 07 Nov 1980 AE3 2.0 F824 00 20 +00 00 J8202 GG395 60 05 Nov 1982 AI3 2.5 UJ11474P NONE 60 01 Nov 1986 BI4 2.5 SGP 00 53 -28 00 J9766 GG395 70 23 Nov 1984 A 2.5 UJ3682P NONE 70 17 Oct 1977 A 2.0 F826 01 00 +00 00 J7915 GG395 60 20 Jul 1982 BI3 3.0 UJ12187P NONE 85 23 Sep 1987 A1 2.0 F832 03 00 +00 00 J8288 GG395 60 09 Dec 1982 BIE3 3.0 UJ12188P NONE 85 23 Sep 1987 A1 2.0 F854 10 20 +00 00 J10147 GG395 65 11 May 1985 AIE3 2.0 UJ11746P NONE 65 01 Apr 1987 AI3 2.0 F858 11 40 +00 00 J9301 GG395 60 23 May 1984 BI3 3.0 UJ11757P NONE 65 02 Apr 1987 AP2 2.0 VSW 12 16 +15 27 J4884 GG395 60 24 Mar 1979 A 2.5 UJ10742P NONE 44 15 Feb 1986 BI 3.0 VNW 12 16 +11 12 J4889 GG395 60 25 Mar 1979 * 3.0 UJ10732P NONE 55 10 Feb 1986 BID3 3.0 VSE 12 34 +11 12 J4885 GG395 60 24 Mar 1979 * 3.5 UJ10738P NONE 55 11 Feb 1986 AI2 2.5 VNE 12 34 +15 27 J4888 GG395 60 25 Mar 1979 * 2.0 UJ10749P NONE 45 16 Feb 1986 A 2.0 F861 12 40 +00 00 J5023 GG395 65 19 May 1979 AI2 2.5 UJ5853P NONE 45 14 Apr 1980 AR3 2.0 F863 13 20 +00 00 J11048 GG395 27 16 Apr 1986 A 2.5 UJ11759P NONE 65 02 Apr 1987 AP1 2.0 F864 13 40 +00 00 J9108 GG395 60 07 Mar 1984 AI3 3.0 UJ6997P NONE 55 04 May 1981 AI3 2.0 F867 14 40 +00 00 J5773 GG395 72 19 Mar 1980 A0 2.0 UJ11760P NONE 65 02 Apr 1987 AI2 2.0 F287 21 28 -45 00 J6229 GG395 65 09 Aug 1980 A 2.0 UJ4520P NONE 60 30 Sep 1978 AI3 2.5 MTF 22 03 -18 55 J1746 GG395 70 06 Aug 1975 BI4 4.0 UJ6526P NONE 45 30 Oct 1980 A 2.0 F891 22 40 +00 00 J8196 GG395 60 04 Nov 1982 AI2 3.0 UJ11478P NONE 60 02 Nov 1986 A1 2.0
Confusion_Flag
A flag that is set to 'C' (note that the original value was
'+' in the published version) if the magnitude includes a contribution from
a nearby companion object. Due to the presence of the latter, the coordinates
of the QSO in such a case are uncertain by up to 3 arcseconds.
Class
Browse classification: all entries in this database have been
given a class of "QSO" (numerical value = 7200).