! Proposal 5990, submission 2 ! PI: Carl Grillmair ! Received Thu Jun 29 20:08:06 EDT 1995 ! From: carl@ucolick.org ! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 5990,v 7.1 1996/01/15 13:51:09 pepsa Exp $ ! ! Refer to the HST Phase II Proposal Instructions to fill this out ! ! Anything after a "!" is ignored, and may be deleted ! ! All keywords with multiple entries are comma delimited except the ! Visit_Requirements and Special_Requirements keywords which can be ! delimited with carriage returns or semi-colons, but not commas ! ! For help call your Program Coordinator: Giselle Sleiman ! Phone: 410 338-4753 , E-mail: sleiman@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sun Dec 18 10:19:26 EST 1994 ! Proposal_Information ! Section 4 Title: Globular Clusters in Fornax Galaxies Proposal_Category: GO Scientific_Category: Galaxies & Clusters Cycle: 5 Investigators PI_name: Carl Grillmair PI_Institution: University of California Observatories/Lick Observatory CoI_Name: Duncan Forbes CoI_Institution: University of California Observatories/Lick Observatory Contact: N ! Y or N (designate at most one contact) CoI_Name: Jean Brodie CoI_Institution: University of California Observatories/Lick Observatory Contact: N ! Y or N (designate at most one contact) CoI_Name: Kenneth Freeman CoI_Institution: Mount Stromlo and Siding Springs Observatories Contact: N ! Y or N (designate at most one contact) CoI_Name: Rebecca Elson CoI_Institution: University of Cambridge Contact: N ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) Outside the Local Group, the nearest concentration of large globular cluster systems is in the Fornax cluster. Based on differences in host galaxy morphologies, we expect that these globular cluster systems should show differences which would bear on our understanding of the role of mergers, tidal encounters, cooling flows, and initial collapse in the formation and evolution of globular clusters and cluster galaxies. We propose to obtain WFPC2 images of the cores of the cD galaxy NGC 1399, the merger candidate NGC 1316, and two more normal ellipticals. The superior resolution of WFPC2 will permit detection and photometry of globular clusters in the bright and crowded centers of our sample galaxies as well as enable improved discrimination between globular clusters and background galaxies. We will measure colors, surface densities, and structural parameters of these globulars and, by comparing with control fields and ground-based imaging, measure system core radii, look for radial color gradients, and search for young, blue clusters of the type discovered in NGC 1275. We will also determine globular cluster luminosity functions to about 3 magnitudes past the expected luminosity peak, enabling us to i) test the ``universality'' of globular cluster luminosity functions, ii) look for environmental influences, and iii) improve estimates for the distance to the Fornax cluster. Followup spectroscopy of young or otherwise interesting objects will be carried out using the Keck telescope. Questions ! Free format text (please update) Observing_Description: We propose to obtain WFPC2 images in two colors of the central regions of 4 elliptical galaxies in the Fornax cluster with known globular cluster systems. We will also observe 2 control fields in an identical manner for comparison and calibration purposes. We would require integration times sufficient to give us reasonable photometry (+/- .1 mag) down to I ~ 26. Based on work in progress on WFPC2 images of globular clusters in M31 (Grillmair et al. 1995, in preparation), we would require 30 minutes of integration time in F814W to reach this level. Using the filter/telescope efficiencies given in the WFPC2 Handbook and assuming a G0 spectrum for globular clusters, we calulate that we can achieve a similar S/N using F450W in ~ 90 minutes. For NGC 1399 we propose 3*10 minute exposures in F814W during the first orbit, and 4*22 minute exposures in F450W during the subsequent two orbits. The two background fields will be observed in exactly the same manner. Examination of deconvolved WFPC1 images of NGC 1316 reveal that the core of the galaxy would be saturated in F814W at the exposure levels used above. We would consequently split our F814W observations of this galaxy into one 4 minute exposure followed by 2*13 minute exposures to permit recovery of information in the central few pixels. As the central surface brightnesses of NGC 1379 and NGC 1404 are poorly known, we will observe these galaxies using the same strategy used for NGC 1316. This yields a total of 45 exposures over 18 primary orbits. Real_Time_Justification: None. Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets Target_Number: 1 Target_Name: NGC1316 Alternate_Names: FornaxA Description: GALAXY, Radio Galaxy, Interacting Galaxy Position: RA = 3H 22M 41.8S +/- 0.2S, DEC = -37D 12' 29.8" +/- 2.0" Equinox: 2000 RV_or_Z: V = +1793 Flux: SURF(V)=13.4 +/- 0.2, B-V=0.93, U-B=0.47 Comments: Colors from RC3, surface brightness from WFPC1. Target_Number: 2 Target_Name: NGC1399 Description: GALAXY, Elliptical Position: RA = 3H 38M 29.0S +/- 0.2S, DEC = -35D 27' 0.5" +/- 2.0" Equinox: 2000 RV_or_Z: V = +1447 Flux: SURF(V)=15.9 +/- 0.2, B-V=0.98, U-B=0.56 Comments: Surface brightness from WFPC1. Target_Number: 3 Target_Name: NGC1379 Description: GALAXY, Elliptical Position: RA = 3H 36M 3.89S +/- 0.2S, DEC = -35D 26' 26" +/- 2.0" Equinox: 2000 RV_or_Z: V = +1376 Flux: SURF(V)=13 +/- 1.0, B-V=0.91, U-B=0.41 Comments: Surface brightness extrapolated from Schombert's profile. Target_Number: 4 Target_Name: NGC1404 Description: GALAXY, Elliptical Position: RA = 3H 38M 51.7S +/- 0.2S, DEC = -35D 35' 36" +/- 2.0" Equinox: 2000 RV_or_Z: V = +1929 Flux: SURF(V)=11.0 +/- 1.0, B-V=0.99, U-B=0.57 Comments: Surface brightness extrapolated from Schombert's profile. Target_Number: 5 Target_Name: FIELD-0338-3523 Description: CLUSTER OF GALAXIES, Blank Sky Position: RA = 3H 37M 57.08S +/- 0.01S, DEC = -35D 21' 54.5" +/- 0.01" Equinox: 2000 Comments: Target_Number: 6 Target_Name: FIELD-0336-3645 Description: CLUSTER OF GALAXIES, Blank Sky Position: RA = 3H 36M 2.75S +/- 0.01S, DEC = -36D 45' 54.0" +/- 0.01" Equinox: 2000 Comments: ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits Visit_Number: 1 Visit_Requirements: Exposure_Number: 1 Target_Name: NGC1316 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 260S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 2 Target_Name: NGC1316 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1600S Exposure_Number: 3 Target_Name: NGC1316 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Exposure_Number: 4 Target_Name: NGC1316 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=.5454545 Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 5 Target_Name: NGC1316 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 1400S Special_Requirements: POS TARG +0.5005,+0.5005 Visit_Number: 2 Visit_Requirements: Exposure_Number: 1 Target_Name: NGC1399 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1200S Comments: Exposure_Number: 2 Target_Name: NGC1399 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 3 Target_Name: NGC1399 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 4 Target_Name: NGC1399 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Visit_Number: 3 Visit_Requirements: Exposure_Number: 1 Target_Name: NGC1379 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 260S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 2 Target_Name: NGC1379 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1600S Exposure_Number: 3 Target_Name: NGC1379 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Exposure_Number: 4 Target_Name: NGC1379 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=.5454545 Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 5 Target_Name: NGC1379 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 1400S Special_Requirements: POS TARG +0.5005,+0.5005 Visit_Number: 4 Visit_Requirements: Exposure_Number: 1 Target_Name: NGC1404 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 260S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 2 Target_Name: NGC1404 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1600S Exposure_Number: 3 Target_Name: NGC1404 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Exposure_Number: 4 Target_Name: NGC1404 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=.5454545 Number_of_Iterations: 1 Time_Per_Exposure: 1100S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 5 Target_Name: NGC1404 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 1400S Special_Requirements: POS TARG +0.5005,+0.5005 Visit_Number: 5 Visit_Requirements: Exposure_Number: 1 Target_Name: FIELD-0338-3523 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1200S Comments: Exposure_Number: 2 Target_Name: FIELD-0338-3523 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 3 Target_Name: FIELD-0338-3523 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 4 Target_Name: FIELD-0338-3523 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Visit_Number: 6 Visit_Requirements: Exposure_Number: 1 Target_Name: FIELD-0336-3645 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Number_of_Iterations: 1 Time_Per_Exposure: 1200S Comments: Exposure_Number: 2 Target_Name: FIELD-0336-3645 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Optional_Parameters: CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 3 Target_Name: FIELD-0336-3645 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Special_Requirements: POS TARG +0.5005,+0.5005 Exposure_Number: 4 Target_Name: FIELD-0336-3645 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F450W Number_of_Iterations: 1 Time_Per_Exposure: 2600S Data_Distribution ! 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