J/AJ/122/1125 BVRI photometry in 3 high-z clusters (Postman+, 2001)
A study of nine high-redshift clusters of galaxies.
IV. Photometry and spectra of clusters 1324+3011 and 1604+4321.
Postman M., Lubin L.M., Oke J.B.
<Astron. J. 122, 1125 (2001)>
=2001AJ....122.1125P 2001AJ....122.1125P
ADC_Keywords: Clusters, galaxy ; Photometry, UBVRI ; Redshifts
Keywords: cosmology: observations - galaxies: clusters: general
Abstract:
New photometric and spectroscopic observations of galaxies in the
directions of three distant clusters are presented as part of our
ongoing high-redshift cluster survey. The clusters are Cl 1324+3011 at
z=0.76, Cl 1604+4304 at z=0.90, and Cl 1604+4321 at z=0.92. We
have spectroscopically confirmed cluster membership for 2040 galaxies
in each system and have also obtained spectra for over 280 field
galaxies spanning the range 0<z<2.5.
Objects:
------------------------------------------------------------------
RA (2000) DE Designation(s)
------------------------------------------------------------------
13 24 20.6 +30 13 02 GHO 132201+302842 = Cl J1324+3011 (z=0.76)
16 04 25.2 +43 04 52 GHO 160244+431254 = Cl J1604+4303 (z=0.90)
16 04 32 +43 21 18 GHO 160253+432924 = Cl J1604+4321 (z=0.92)
------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 132 161 Field Cl J1324+3011 photometric and spectroscopic data
table3.dat 132 116 Field Cl J1604+4304 photometric and spectroscopic data
table4.dat 132 163 Field Cl J1604+4321 photometric and spectroscopic data
--------------------------------------------------------------------------------
See also:
J/AJ/116/560 : Cl J0023+0423 and Cl J1604+4304 spectroscopy (Postman+ 1998)
J/AJ/116/584 : Cl J0023+0423 and Cl J1604+4304 morphology (Lubin+ 1998)
Byte-by-byte Description of file: table2.dat table3.dat table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- [PLO2001] Keck object identification number (1)
6- 7 A2 --- f_[PLO2001] Flag on ID (2)
9- 10 I2 h RAh ? Right Ascension J2000 (hours)
12- 13 I2 min RAm ? Right Ascension J2000 (minutes)
15- 19 F5.2 s RAs ? Right Ascension J2000 (seconds)
21 A1 --- DE- ? Declination J2000 (sign)
22- 23 I2 deg DEd ? Declination J2000 (degrees)
25- 26 I2 arcmin DEm ? Declination J2000 (minutes)
28- 31 F4.1 arcsec DEs ? Declination J2000 (seconds)
33- 37 F5.2 mag Bmag ? The apparent ABB passband magnitude
39- 43 F5.2 mag Vmag ? The apparent ABV passband magnitude
45- 49 F5.2 mag Rmag ? The apparent ABR passband magnitude
51- 55 F5.2 mag Imag ? The apparent ABI passband magnitude
57- 62 F6.4 --- z ?=9.000 The geocentric redshift
64 I1 --- q_z [0/4] Measure of the quality in z (3)
66- 70 F5.2 --- b ? Logarithmic slope of the broadband energy
distribution (in mag/[Hz], units of
ABmag per unit interval of log(nu))
72- 75 F4.1 Gyr tau ? Best fit e-folding timescale for a
constant-age (4.8Gyr at z=0.9) model
77 A1 --- f_tau [l] l: indicates acceptable fit is not
possible for tau<20Gyr
79- 81 A3 --- SpClass [ak+ ] Spectral classification (4)
83- 86 F4.1 Gyr Age ? Age of the best fit tau=0.6 model
88- 93 F6.1 0.1nm EW[OII] ? [OII] (3727Å) rest equivalent width
in Angstroms (5)
95-100 F6.1 0.1nm EWHbeta ? Hβ rest equivalent width
in Angstroms (5)
102-107 F6.1 0.1nm EW[OIII] ? [OIII] (5007Å) rest equivalent width
in Angstroms (5)
109-113 F5.2 mag Jl ? Modified lower jump parameter (6)
115-119 F5.2 mag Ju ? Modified upper jump parameter (7)
121-125 F5.2 solMass/yr SFR ? The estimated star formation rate
127-132 F6.2 mag BMAG ? Absolute rest AB B-band magnitude
--------------------------------------------------------------------------------
Note (1): Identifications:
In table2.dat: [PLO2001] J1324+3011 NNNN, in Simbad
In table3.dat: [PLO2001] J1604+4304 NNNN, in Simbad
In table4.dat: [PLO2001] J1604+4321 NNNN, in Simbad
For table3.dat, two spectroscopically confirmed members of Cl 1604+4304
lie near the edge of our LRIS imager and, hence, only have photometric
information for the R-band. These two galaxies are not included in
Table 3 but their redshifts are 0.9040 and 0.9073.
Note (2): Note on galaxy:
* = Considered to be a member of the cluster;
** = the brightest cluster galaxy.
Note (3): Quality redshift:
0: no redshift
1: redshift possible
2: redshift probably correct
3: redshift almost certainly correct
4: redshift is certain
Note (4): Spectral classification:
a = Objects have spectra that are dominated by Balmer lines, lack any
G-band absorption, and have a Ca II K line strength that is no
more than 25% of the strength of the H + Hε line.
a+k = Objects have strong Balmer lines, a CaII K line that is
approximately 50% of the strength of the H + Hε line,
and a detectable G-band line.
k+a = Objects have a CaII K line that is equal in strength to
H + Hε, and have a G-band feature that is as strong as
Hγ, if Hγ is not filled with emission.
k = Objects have a CaII K line is stronger than H + Hε,
have very strong 3835Å and G-band features, and exhibit
little or no Hγ absorption.
Note (5): Emission line equivalent widths are given as negative values and
positive values are used for absorption features.
Note (6): Defined as the difference of the average flux (expressed in AB
magnitudes) measured from 3400 to 3700Å and the defined continuum
at the central wavelength of this band (i.e. 3550Å).
Note (7): Defined as the difference of the average flux (expressed in AB
magnitudes) measured from 3750 to 3980Å and the defined continuum
at the central wavelength of this band (i.e. 3865Å).
--------------------------------------------------------------------------------
History:
* 14-Jan-2002: From electronic version of the journal
* 30-Aug-2005: Position added (supplied by Marc Postman to Marion Schmitz)
References:
Oke et al., Paper I 1998AJ....116..549O 1998AJ....116..549O
Postman et al., Paper II 1998AJ....116..560P 1998AJ....116..560P, Cat. J/AJ/116/560
Lubin et al., Paper III 1998AJ....116..584L 1998AJ....116..584L, Cat. J/AJ/116/584
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 14-Jan-2002