J/MNRAS/309/48 QSOs redshifts and spectra in ESO/SERC field 927 (Clowes+ 1999)
Further observations of quasars in ESO/SERC field 927
Clowes R.G., Campusano L.E., Graham M.J.
<Mon. Not. R. Astron. Soc. 309, 48 (1999)>
=1999MNRAS.309...48C 1999MNRAS.309...48C
ADC_Keywords: QSOs ; Redshifts ; Magnitudes ; Equivalent widths
Keywords: surveys - quasars: general - large-scale structure of Universe
Abstract:
We present the spectra and redshifts of 62 quasars, from observations
made with the Cerro Tololo Inter-American Observatory (CTIO) 4-m
Blanco Telescope. These quasars form part of a total sample of 118
(with 56 having been published previously), which is being used for
analysis of structure in the early universe. Quasars of particular
interest are noted, including eight broad absorption line (BAL)
quasars and two quasars with unusual emission spectra. Finally, we
include a short summary of the present status of the large quasar
group (LQG) that was discovered by Clowes & Campusano (1991, Cat.
J/MNRAS/249/218 and 1994, Cat. J/MNRAS/266/317) from the earlier
observations. The quasars are from an area ∼25.3deg2 of ESO/SERC
field 927, which is centred at (B1950) 10h 40m 00s, 05° 00'00".
Description:
Spectroscopic observations of the 86 quasar candidates where obtained
from the CTIO 4m Blanco telescope and its Ritchey-Chretien spectrograph,
on nights of 1992-03305/05, 1993-02-23/26 ans 1994-02-07/11.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 115 63 Observations of the confirmed QSO candidates
--------------------------------------------------------------------------------
See also:
J/MNRAS/249/218 : Group of quasars (Clowes+, 1991)
J/MNRAS/266/317 : Quasars in ESO/SERC field 927 (Clowes+, 1994)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RA50h Right ascension (B1950.0)
4- 5 I2 min RA50m Right ascension (B1950.0)
7- 10 F4.1 s RA50s Right ascension (B1950.0)
12 A1 --- DE50- Declination sign (B1950.0)
13- 14 I2 deg DE50d Declination (B1950.0)
16- 17 I2 arcmin DE50m Declination (B1950.0)
19- 20 I2 arcsec DE50s Declination (B1950.0)
23- 24 I2 h RAh Right ascension (J2000.0)
26- 27 I2 min RAm Right ascension (J2000.0)
29- 32 F4.1 s RAs Right ascension (J2000.0)
34 A1 --- DE- Declination sign (J2000.0)
35- 36 I2 deg DEd Declination (J2000.0)
38- 39 I2 arcmin DEm Declination (J2000.0)
41- 42 I2 arcsec DEs Declination (J2000.0)
44- 51 A8 "YY/MM/DD" Obs1 Observation date
52 A1 --- --- [-]
53- 54 I2 d Obs2 Last day of observation
56- 59 I4 s Tint Integration time
61- 66 F6.4 --- LSP ? Automated Quasar Detection (AQD)
Line-Strength Parameter value
67 A1 --- n_LSP [SW] 'S' for strong-lined (high LSP)
'W' for weak-lined (low LSP)
69- 73 F5.2 mag Bmag ? BJ magnitude
75- 79 F5.3 --- z ? Redshift
80 A1 --- u_z [?] Uncertainty flag on z
81 A1 --- l_EW Limit flag in EW
82- 84 I3 0.1nm EW ? Equivalent width
86 I1 --- Line ? Identity of the strongest emission line (1)
89-118 A30 --- Com Comment (Keable 1987 refers to Keable-s PhD
thesis, Univ. Edinburgh)
--------------------------------------------------------------------------------
Note (1): Identification of strongest emission lines as follows:
1 = Lyα λ1216 + N V λ1240
2 = C IV λ1549
3 = C III] λ1909
4 = Mg II λ2798
5 = Hβ λ4861
--------------------------------------------------------------------------------
History: Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 22-Feb-2000