! +====================+ ! | PED OUTPUT PRODUCT | ! +====================+ ! ! /data/frodo1/aroman/work/6640.prop ! Generated by PREPROCESSOR, version 7.0.1e ! Date: Wed Mar 05 14:48:24 EST 1997 Proposal_Information Title: A Stellar Population Survey of the Nuclear Region of M33 Proposal_Category: GO Scientific_Category: STELLAR POPULATIONS Cycle: 6 Investigators PI_Name: Kenneth Mighell PI_Institution: Columbia University CoI_Name: R. Michael Rich CoI_Institution: Columbia University Contact: N Abstract: Our analysis of archival HST images of the nuclear region of M33 reveal that the old, red stars are more centrally concentrated to the nucleus than the young star forming disk. We will extend our investigation of the stellar populations near the nucleus of M33 out to a radial distance of 10 arcmin by doing a WFPC2 strip survey of all M33 stars brighter than I~23.0 mag from the nucleus to the nearby globular cluster H38. The detection limit of the survey is about 2.3 mag below the tip of the red giant branch of the Population II stars in M33. This survey will allow us to separate the bulge population from the disk on the basis of their spatial distributions and we will also cover a large enough radial distance from the nucleus to measure directly the effective radius of the spheroid population. Our discovery of a large abundance spread of at least 1.5 dex found in the population II red giants near the nucleus of M33 suggests that the the chemical evolution of the nuclear region was considerably different than that of the M33 halo. This survey should provide valuable information about the formation and chemical evolution of the nuclear region of M33. These images will show whether M33 has a bulge that is much younger than its halo, how its oldest populations are related to the disk, and how the spheroid is related to the nucleus. This kind of detailed study is possible only in M33 because of its proximity, face-on inclination, low surface brightness, and well defined population II. Questions Observing_Description: We will do a strip survey of the stellar populations of the nuclear region of M33 from the nucleus out to a radial distance of 10 arcmin. We will spend 2 orbits per target field using the WFPC2 instrument with the F555W filter (1 orbit/field) and the F814W filter (1 orbit/field). We have seven targets and will use a total of 14 primary orbits in 7 visits (2 orbits/visit). The first orbit of each visit will have 6 exposures in F814W : 2x800s, 3x160s and 1x40s. The second orbit of each visit will have 6 exposures in F555W : 2x800s and 4x160s. The asymptotic giant branch stars above the tip of the population II red giant branch (I=20.7 mag) will be at least 2.3 magnitudes above our detection limit (I~23.0 mag) for these observations. Real_Time_Justification: None. None. Calibration_Justification: Additional_Comments: Fixed_Targets Target_Number: 1 Target_Name: NGC598-SRV1 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 39' 36.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 2 Target_Name: NGC598-SRV2 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 38' 6.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 3 Target_Name: NGC598-SRV3 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 36' 36.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 4 Target_Name: NGC598-SRV4 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 35' 6.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 5 Target_Name: NGC598-SRV5 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 33' 36.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 6 Target_Name: NGC598-SRV6 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 32' 6.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Target_Number: 7 Target_Name: NGC598-SRV7 Alternate_Names: Description: GALAXY Position: RA=01H 33M 51.00S +/- 0.01S,DEC=30D 30' 36.0" +/- 0.1" Equinox: J2000.0 RV_or_Z: RA_PM: 0.0 Dec_PM: 0.0 Epoch: Annual_Parallax: Flux: V = 20 B-V = 0.7 Comments: Solar_System_Targets Generic_Targets Scan_Data Visits Visit_Number: 01 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 1st visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV1 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV1 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV1 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV1 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV1 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 02 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 2nd visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV2 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV2 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV2 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV2 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV2 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 03 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 3rd visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV3 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV3 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV3 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV3 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV3 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 04 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 4th visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV4 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV4 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV4 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV4 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV4 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 05 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 5th visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV5 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV5 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV5 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV5 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV5 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 06 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 6th visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV6 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV6 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV6 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV6 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV6 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Visit_Number: 07 Visit_Requirements: On_Hold_Comments: Visit_Comments: Please schedule this as the 7th visit of this program Exposure_Number: 11 Target_Name: NGC598-SRV7 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 13 Target_Name: NGC598-SRV7 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 3 Time_Per_Exposure: 160 S Special_Requirements: Comments: Exposure_Number: 16 Target_Name: NGC598-SRV7 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F814W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 1 Time_Per_Exposure: 40 S Special_Requirements: Comments: Exposure_Number: 21 Target_Name: NGC598-SRV7 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 2 Time_Per_Exposure: 800 S Special_Requirements: Comments: Exposure_Number: 23 Target_Name: NGC598-SRV7 Config: WFPC2 Opmode: IMAGE Aperture: PC1-FIX Sp_Element: F555W Wavelength: Optional_Parameters: CLOCKS=NO,ATD-GAIN=7,CR-SPLIT=NO Number_of_Iterations: 4 Time_Per_Exposure: 160 S Special_Requirements: Comments: Data_Distribution ! 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