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! /tr/taka/HST/cycle6/rps2/myfile/6838.prop
! Generated by PREPROCESSOR, version 6.0e
! Date: Tue Feb 13 15:39:35 CST 1996
Proposal_Information
Title: Dynamical Properties of Distant Field Galaxies
Proposal_Category: GO
Scientific_Category: COSMOLOGY
Cycle: 6
Investigators
PI_Name: Richard G. Kron
PI_Institution: The University of Chicago
CoI_Name: David Koo
CoI_Institution: Lick Observatory, UCSC
Contact:
CoI_Name: Marianne Takamiya
CoI_Institution: The University of Chicago
Contact: Y
CoI_Name: S.M. Faber
CoI_Institution: Lick Observatory, UCSC
Contact:
CoI_Name: Garth Illingworth
CoI_Institution: Lick Observatory, UCSC
Contact:
Abstract:
A sample of several hundred field galaxies to I = 24 (c.f. to
I=22 z~0.5 from Lilly et al. 1995) is being
observed with the Keck telescope in a major new survey. The
distribution of high redshift galaxies bears directly on
models for cosmology (via the number-redshift relation) and
galaxy evolution. The unique aspect of the new survey is the
inclusion of useful line widths from the spectra, providing,
for the first time, a sample of high-redshift galaxies with
kinematical information. With the addition of an image size
scale provided by WFPC2, dynamical parameters can be
determined. WFPC2 imaging, the existing faint photometric and
spectroscopic database in the Koo-Kron redshift survey fields
(Munn et al. 1995), and new Keck spectroscopy combine to form
a powerful new database that will advance our studies of
cosmology and galaxy evolution at high redshift.
We propose to obtain WFPC2 images (F606W and F814W) in one region of the
sky, adjacent to existing deep WFPC2 images. This
combined region is designed to match the field-of-view of the
Keck multiple-object spectrograph. This strategy enables a
factor-of-three higher rate of acquisition of spectra for
galaxies with measured HST image parameters. Keck
spectroscopy in this field has already been
successfully initiated, and further Keck observations will
proceed in parallel with the new WFPC2 exposures.
Questions
Observing_Description:
To describe the selection of the HST target fields, we first
need to review the capabilities of LRIS, Keck's low
resolution imaging spectrograph. LRIS has a field-of-view of
6' x 8'. Typically 20 - 30 objects can be observed
simultaneously and with multiple masks constructed for the
same field, eventually all of the galaxies meeting a flux or
surface brightness limit can be targeted. The density of
field galaxies for I<=22 is about 5 square-arcmin and about 20
square-arcmin to I~24. Thus each WFPC2 field will yield
roughly 80 galaxies to the fainter limit. The large majority
of these will yield redshifts with Keck, and a substantial
fraction will yield line-width measures because of the
prevalence of faint galaxies with strong emission lines. A
row of 3 adjacent WFPC2 pointings gives an area that fits
nicely inside a single LRIS pointing. The common area
contains over 200 galaxies with I<24 and will thus support
about 8 LRIS masks or about 3 clear nights of Keck
observations.
We have conducted an extensive search for suitable
fields already in the HST archives. The general criteria are:
1) moderately deep exposure (few orbits) in at
least one standard broad band (F814W and F606W); 2) high
Galactic latitude; 3) no large or bright object contained in
the field; 4) far from the Groth strip which we are already
targeting (to be certain there is no correlation); 5)
adjacent WFPC2 fields to approximate the 6' x 8' field-of-
view of LRIS. No fields satisfied all of these criteria, but
of course many fields satisfied some of the criteria.
We propose to obtain additional HST imaging to establish new
fields that will be probed exhaustively with Keck to obtain
spectra with high S/N of faint galaxies. To minimize the
amount of required HST time, we have worked to take best
advantage of the archival exposures that were revealed in our
search described above. Our assessment of the best candidates
are three pointings in SA68 between FIELD-001702+154814 (GTO 5706,
F814W) and FIELD-001719+154814 (GTO 5706, F814W), and two
adjacent pointings on both sides of 53W002 (GO 5308, F814W
and F606W), to produce two tile-shaped LRIS field. We will
spend one to two orbits per pointing, one orbit in each filter,
in SA68 to obtain sufficient S/N to measure high-quality image
parameters at I=22 (Phillips et al. 1995).
REFERENCES
Connolly, A. J., Csabai, I., Szalay, A. S., Koo, D. C., Kron,
R. G., and Munn, J. A. 1995, AJ, in press
Connolly, A. J. 1995, private communication
Driver, S. P., Windhorst, R. A., and Griffiths, R. E., 1995,
ApJ, in press
Guzman, R., Koo, D. C., Faber, S. M., Illingworth, Takamiya, M.,
Kron, R. G., and Bershady, M. A. 1996, ApJ (Letters), in press
Koo, D.C. & Kron, R.G. 1992, ARAA, 30, 613
Koo, D. C., Guzman, R., Faber, S. M., Illingworth, G. D., Bershady,
M. A., Kron, R. G., and Takamiya, M. 1995, 440, L49
Kron, R.G. 1987, in Nearly Normal Galaxies, ed. S.M. Faber
(Springer-Verlag:New York), p. 300
Lilly, S. J., Tresse, L., Hammer, F., Crampton, D., and Le Fevre
O. 1995, ApJ, in press
Munn, J. A., Koo, D. C., Kron, R. G., Majewski, S. R., Bershady, M.
A., and Smetanka, J. J., 1995, ApJS, submitted
Phillips, A. C. et al., 1995, AJ, submitted
Real_Time_Justification:
None.
An observing run with Keck/LRIS in August 1995 has yielded
about 105 redshifts in the SA68 field (00h+15), half of
which are fainter than B=25 and I=22. The slit masks
were prepared based on image detection of a surrounding 15' x
15' field performed by collaborators R. Brunner, A. Connolly,
and A. Szalay of new deep ground-based CCD exposures in B and
I. A set of 30 of the new spectra fall within existing WFPC2
fields; the combined Keck+HST data are under study. Another
25 of the existing spectra fall within the currently proposed
WFPC2 fields in SA68, and these galaxies will be analyzed
for image structure parameters once the WFPC2 data are
obtained. By targeting SA68 again with a similar investment
of Keck observing time, but focused in the proposed WFPC2
field, we expect to obtain another 100 to 150 new redshifts
in the overlapping area of sky. In total, we expect
to have about 150 redshifts in this field by end of
1996 with another 150 or so a year later. Half of these will
be fainter than I=22, and two thirds of these should
overlap with deep WFPC2 fields. These WFPC2 exposures are a
combination of exposures already obtained in other programs,
and the new pointings that we are proposing here. (We have
also targeted the Groth strip which will yield an even higher
number of redshifts.)
Calibration_Justification:
Additional_Comments:
We have chosen the WFPC2 fields to contain as many galaxies with
measured redshifts as possible. This results in a tight constraint in
orientation angle of the telescope.
Fixed_Targets
Target_Number: 1
Target_Name: FIELD-001728+154634
Alternate_Names:
Description: CLUSTER OF GALAXIES,BLANK SKY,GALAXY,HIGH Z GAL
Position: RA=0H 17M 28.39S +/- 0.1S,DEC=15D 46' 34.1" +/- 1.0"
Equinox: J2000.0
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
V = 22.0+/-1.0
Comments: Targets in all WFC's. Bright star (V~15) west of WFC3 avoided with chosen ORIENT angles; ORIENT=117D is preferred.
Field with 3 Tully-Fisher galaxies, 2 Faber-Jackson galaxies, and 1 of other interest. PC-FIX centered 4.4 arcsec E and 23.27 arcsec S of galaxy 5498 (Koo & Kron's cat.) with I~20.
Target_Number: 2
Target_Name: FIELD-001712+154913
Alternate_Names:
Description: CLUSTER OF GALAXIES,BLANK SKY,GALAXY,HIGH Z GAL
Position: RA=0H 17M 12.68S +/- 0.1S,DEC=15D 49' 13.5" +/- 1.0"
Equinox: J2000.0
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
V = 22.0+/-1.0
Comments: Targets in all WFC's. Target in WFC3 nears edge of fov. 2 stars in WFC2 of I~17. Good ORIENT's are 32D-58D; ORIENT=49D is preferred.
Field with 3 Tully-Fisher galaxies, 0 Faber-Jackson galaxies, and 1 of other interest. PC-FIX centered between star 7060 and galaxy 6882 (in Koo & Kron's cat.).
Target_Number: 3
Target_Name: FIELD-001719+154530
Alternate_Names:
Description: CLUSTER OF GALAXIES,BLANK SKY,GALAXY,HIGH Z GAL
Position: RA=00H 17M 19.55S +/- 0.1S,DEC=15D 45' 30.3" +/- 1.0"
Equinox: J2000.0
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
V = 22.0+/-1.0
Comments: Targets placed in all WFC's. Bright star (I~15) west of WFC4 avoided. Good ORIENT 92D-100D; ORIENT=92D is preferred.
Field with 3 Tully-Fisher galaxies, 0 Faber-Jackson galaxies, and 0 of other interest. PC-FIX centered on galaxy 4607 (in Koo & Kron's cat.).
Target_Number: 4
Target_Name: FIELD-001706+154548
Alternate_Names:
Description: CLUSTER OF GALAXIES,BLANK SKY,GALAXY,HIGH Z GAL
Position: RA=00H 17M 06.43S +/- 0.1S,DEC=15D 45' 48.8" +/- 1.0"
Equinox: J2000.0
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
V = 22.0+/-1.0
Comments: Targets placed in all WFC's. I~16.5 star close to apex of WFPC2. Acceptable ORIENT 73D-100D; ORIENT=85D is preferred.
Field with 2 Tully-Fisher galaxies, 0 Faber-Jackson galaxies, and 0 of other interest. PC-FIX centered on galaxy 4790 (in Koo & Kron's cat.).
Target_Number: 5
Target_Name: FIELD-001719+154914
Alternate_Names:
Description: CLUSTER OF GALAXIES,BLANK SKY,GALAXY,HIGH Z GAL
Position: RA=00H 17M 20.97S +/- 0.1S,DEC=15D 49' 30.4" +/- 1.0"
Equinox: J2000.0
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
V = 22.0+/-1.0
Comments: Field position and ORIENT (240D) chosen to overlap FIELD-001719+154914 (GTO 5706) in F814W. Targets placed in all WFC and PC. Field with 6 Tully-Fisher galaxies, 1 Faber-Jackson galaxies, and 1 of other interest. PC-FIX centered between galaxies 6913 and 7051 (in Koo & Kron's cat.).
Solar_System_Targets
Generic_Targets
Scan_Data
Visits
Visit_Number: 01
Visit_Requirements:
ORIENT 115D TO 134D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 10
Target_Name: FIELD-001728+154634
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F606W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2500S
Special_Requirements:
Comments:
Exposure_Number: 20
Target_Name: FIELD-001728+154634
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F814W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2600S
Special_Requirements:
Comments:
Visit_Number: 02
Visit_Requirements:
ORIENT 32D TO 58D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 10
Target_Name: FIELD-001712+154913
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F606W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2500S
Special_Requirements:
Comments:
Exposure_Number: 20
Target_Name: FIELD-001712+154913
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F814W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2600S
Special_Requirements:
Comments:
Visit_Number: 03
Visit_Requirements:
ORIENT 92D TO 100D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 10
Target_Name: FIELD-001719+154530
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F606W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2500S
Special_Requirements:
Comments:
Exposure_Number: 20
Target_Name: FIELD-001719+154530
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F814W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2600S
Special_Requirements:
Comments:
Visit_Number: 04
Visit_Requirements:
ORIENT 73D TO 100D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 10
Target_Name: FIELD-001706+154548
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F814W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2500S
Special_Requirements:
Comments:
Visit_Number: 05
Visit_Requirements:
ORIENT 240D TO 240D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 10
Target_Name: FIELD-001719+154914
Config: WFPC2
Opmode: IMAGE
Aperture: PC1-FIX
Sp_Element: F606W
Wavelength:
Optional_Parameters:
Number_of_Iterations: 1
Time_Per_Exposure: 2500S
Special_Requirements:
Comments:
Data_Distribution ! Defaults indicated; change if desired
Medium: 8MM
Blocking_Factor: 10
Ship_To: PI_Address
Ship_Via: OVERNIGHT
Recipient_Email:
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