! Proposal 5915, submission 2 ! PI: Evan Skillman ! Received Wed Aug 16 18:26:04 EDT 1995 ! From: hst3840@oldstyle.spa.umn.edu ! Hubble Space Telescope Cycle 5 (1995) Phase II Proposal Template ! $Id: 5915,v 4.1 1995/11/20 18:36:26 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: Marc Bremmer ! Phone: 410 338-4458 , E-mail: bremmer@stsci.edu ! ! This partially completed template was generated from a Phase I proposal. ! Date generated: Sat Dec 17 10:14:22 EST 1994 ! Proposal_Information ! Section 4 Title: Star Formation Histories of Dwarf Irregular Galaxies Proposal_Category: GO Scientific_Category: Stellar Populations Cycle: 5 Investigators PI_name: Evan Skillman PI_Institution: University of Minnesota CoI_Name: Cesare Chiosi CoI_Institution: Padova Contact: ! Y or N (designate at most one contact) CoI_Name: Reginald Dufour CoI_Institution: Rice University Contact: ! Y or N (designate at most one contact) CoI_Name: Jay Gallagher CoI_Institution: University of Wisconsin Contact: ! Y or N (designate at most one contact) CoI_Name: John Hoessel CoI_Institution: University of Wisconsin Contact: ! Y or N (designate at most one contact) CoI_Name: Mario Mateo CoI_Institution: University of Michigan Contact: ! Y or N (designate at most one contact) CoI_Name: Abhi Saha CoI_Institution: STScI Contact: ! Y or N (designate at most one contact) Abstract: ! Free format text (please update) We propose to obtain deep WFPC2 `BVI' color-magnitude diagrams (CMDs) for the dwarf irregular (dI) Local Group galaxies GR 8, Leo A, Pegasus, and Sextans A. In addition to resolved stars, we will use star clusters, and especially any globulars, to probe the history of intense star formation. These data will allow us to map the Pop I and Pop II stellar components, and thereby construct the first detailed star formation histories for non-interacting dI galaxies. Our results will bear on a variety of astrophysical problems, including the evolution of small galaxies, distances in the Local Group, age-metallicity distributions in small galaxies, ages of dIs, and the physics of star formation. The four target galaxies are typical dI systems in terms of luminosity, gas content, and H II region abundance, and represent a range in current star forming activity. They are sufficiently near to allow us to reach to stars at M_V = 0, have 0.1 of the luminosity of the SMC and 0.25 of its oxygen abundance. Unlike the SMC, these dIs are not near giant galaxies. This project will allow the extension of our knowledge of stellar populations in star forming galaxies from the spirals in the Local Group down to its smallest members. We plan to take maximum advantage of the unique data which this project will provide. Our investigator team brings extensive and varied experience in studies of dwarf galaxies, stellar populations, imaging photometry, and stellar evolution to this project. Questions ! Free format text (please update) Observing_Description: Our experience with the GR 8 HST data shows that deep BVI imaging will be adequate to address the scientific issues we wish to study. The B-I color will act as a very good discriminant, but it is important to have V so that very blue or very red stars are detected in at least two bands. Also, the color-color diagram is a useful diagnostic for reddening, foreground star rejection, and luminosity class. Multi-color data are very important for the false-star experiments required to determine completeness corrections (Mateo 1988, Saha & Hoessel 1990). We will take a minimum of six exposures per field to facilitate cosmic ray rejection (non trivial from our experience with the undersampled WFPC2 PSF). We will acquire WFPC2 imaging in B, V, and I of a central field in four Local Group Dwarf Irregular Galaxies. Each field will be imaged as follows, the first orbit is dedicated to acquisition and imaging in B (F439W), with subsequent orbits dedicated to imaging in B, V (F555W), and I (F814W). Assuming 52 usable minutes per orbit, 12 minutes for acquisition, and 5 minutes of overhead per C/R split, then the first orbit will be dedicated to two fifteen minute B integrations (all integrations are C/R split). The 2nd, 3rd, and 4th orbits will be dedicated to three twelve minute integrations in B, V, and I, respectively. This allows a total of 3960 seconds in B and 2160 seconds in V and I and a minimum of six exposures in each band. Following the WFPC2 handbook, we calculate S/N ratios of 7.2 for B = 27, 12.1 for V = 27, and 8.6 for I = 27. (Given the low ecliptic latitudes of Sextans A and Leo A, we conservatively assumed a V sky magnitude of 22.4.) This assumes all of the flux is gathered in a single pixel. Relaxing this final assumption gives larger integrations times as indicated in Table 6.4 of the WFPC2 manual. Given a realistic point spread function (which will be a function of the position on the chip) and the crowding of ``background" stars, we can reasonably expect to reach stars as faint as V=27 with these integration times. Thus we feel confident in our ability to reach below the HB and thus work on even the old Pop II components in these galaxies. Team members have a vast amount of experience with DAOPHOT and DoPHOT, especially with versions optimized for undersampled images. In addition to the actual photometry, a large effort will be required to carry out false star reductions. These are critical in producing the luminosity functions in each color. Analysis of the stellar photometry will consist of forming color-magnitude diagrams and color- color plots of the individual identifiable clusters, associations, and other regions in the galaxies. Comparison with theoretical evolutionary tracks (calculated at the appropriate abundances) will then allow us to assign ages (both differential and absolute) to these different features. Although the absolute ages one obtains in this way are model dependent (and therefore carry systematic uncertainties), the relative ages of features are quite reliable. The WFPC2 Team is planning to work with the Padova group with the goal of placing their models onto the main WFPC2 filter system in order to diminish CMD transformation problems. We will proceed in a similar manner to that reported in Bertelli et al.\ (1992), and try to identify regions of different ages. We can illustrate the sensitivity of this approach by calculating the age resolution we can hope to attain from these data. Consider a population made up of two bursts: burst A contains stars of 80 Myr and burst B has stars of 800 Myr age. The relative numbers of stars in burst B divided by the number in burst A is delta. We will examine three cases, assuming an IMF slope of alpha. Defining the ratio R1 as the number of MS stars brighter than M(V)=1 divided by the number of MS stars brighter than M(V)=0, and the ratio R2, the ratio of the number of evolved (that is red) stars brighter than M(V)=0 and the MS stars brighter than the same limit. We then consider three cases: (1) delta equals 5 (that is the old burst dominates the population by mass but NOT by luminosity); (2) delta = 1 (equal bursts); and (3) delta = 0 (no old component). We derive: Case 1: alpha = 1.8; delta = 5: R1 = 7.8 and R2 = 2.7 Case 2: alpha = 1.8; delta = 1: R1 = 3.2 and R2 = 0.57 Case 3: alpha = 2.3; delta = 0: R1 = 3.3 and R2 = 0.06 The comparison between Cases 1 and 2 shows we are very sensitive to the older component even though it barely contributes to the MS stars we are able to directly measure (primarily observed in the differences in the red stars). Note that we'd be able to tell that an even older old component exists, although R1 would saturate at a value consistent with the IMF and we would be limited to determining the total number of stars older than about 1.5 Gyr. Of course, the deeper the photometry, the older the age we can directly detect in this manner. Note that the comparison of cases 2 and 3 shows that if you mimic R1 with a steeper IMF, you get an R1 similar to that as in Case 2, but R2 is completely different (too few red giants from the young population). Real_Time_Justification: Calibration_Justification: ! Move appropriate text from Real_Time_Justification Additional_Comments: Fixed_Targets ! Section 5.1 Target_Number:1 Target_Name:DDO69 Alternate_Names:Leo_A Description:GALAXY, LSB Position:RA=9H 56M 32.5S +/- 0.2S, DEC = +30D 58' 50.0" +/- 1.0" Equinox: 1950 RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: ! Include at least V and B-V Comments: Target_Number:2 Target_Name:DDO75 Alternate_Names:Sextans_A Description:GALAXY, LSB Position:RA=10H 8M 30.0S +/- 0.2S, DEC = -04D 27' 30.0" +/- 1.0" Equinox: 1950 RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: ! Include at least V and B-V Comments: Target_Number:3 Target_Name:DDO155 Alternate_Names:GR_8 Description:GALAXY, LSB Position:RA=12H 56M 08.8S +/- 0.2S, DEC = +14D 28' 53.0" +/- 1.0" Equinox: 1950 RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: ! Include at least V and B-V Comments: Target_Number:4 Target_Name:DDO216 Alternate_Names:Pegasus_DIG Description:GALAXY, LSB Position:RA=23H 28M 33.0S +/- 0.2S, DEC = +14D 44' 16.0" +/- 1.0" Equinox: 2000 RV_or_Z: RA_PM: ! Units are seconds of time per year Dec_PM: ! Units are seconds of arc per year Epoch: Annual_Parallax: Flux: ! Include at least V and B-V Comments: !Scan_data ! ! Scan_number: 1 ! FGS_scan: ! Cont_or_Dwell: D ! Dwell_Points: 3 ! Dwell_Secs: 600 ! Scan_Width: 0.0 ! Scan_Length: 1.202 ! Sides_Angle: 0.0 ! Number_Lines: 1 ! Scan_Rate: ! First_Line_PA: 45 ! Scan_Frame: S/C ! Length_Offset: ! Width_Offset: ! This is a template for a single visit containing a single exposure ! Repeat exposure and visit blocks as needed Visits ! Section 6 Visit_Number:1 Visit_Requirements: ! Section 7.1 ORIENTation 90D TO 120D On_Hold_Comments: Visit_Comments: Exposure_Number:1 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements: ! Section 7.2 Exposure_Number:2 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements:POS TARG 0.2, 0.2 ! Section 7.2 Exposure_Number:3 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.15, 0.05 ! Section 7.2 Exposure_Number:4 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.35, 0.25 ! Section 7.2 Exposure_Number:5 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:6 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:7 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 ! Exposure_Number:8 ! Section 6.5 ! Target_Name:DDO69 ! Config:WFPC2 ! Opmode:IMAGE ! Aperture:WFALL-FIX ! Sp_Element:F814W ! Wavelength: ! Optional_Parameters: CR-SPLIT = NO, ! ATD-GAIN = 15, ! SCAN-READ = ALL !Number_of_Iterations:1 ! Time_Per_Exposure:600S !Special_Requirements:SPATIAL SCAN 1 ! Section 7.2 Exposure_Number:8 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:9 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:10 ! Section 6.5 Target_Name:DDO69 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Visit_Number:2 Visit_Requirements: ! Section 7.1 ORIENTation 270D TO 290D On_Hold_Comments: Visit_Comments: Orientation angle was chosen to avoid the bright star in the field. When this is scheduled, check the orientation to be sure that the bright star is outside of the field of view. Exposure_Number:1 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements: ! Section 7.2 Exposure_Number:2 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements:POS TARG 0.2, 0.2 ! Section 7.2 Exposure_Number:3 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.15, 0.05 ! Section 7.2 Exposure_Number:4 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.35, 0.25 ! Section 7.2 Exposure_Number:5 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:6 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:7 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Exposure_Number:8 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:9 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:10 ! Section 6.5 Target_Name:DDO75 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Visit_Number:3 Visit_Requirements: ! Section 7.1 ORIENTation 55D TO 95D On_Hold_Comments: Visit_Comments: This galaxy is aligned across two WF chips. If there are scheduling problems, other orientations are possible, but the target position and aperture choise would need to be changed. Exposure_Number:1 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements: ! Section 7.2 Exposure_Number:2 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements:POS TARG 0.2, 0.2 ! Section 7.2 Exposure_Number:3 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.15, 0.05 ! Section 7.2 Exposure_Number:4 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.35, 0.25 ! Section 7.2 Exposure_Number:5 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:6 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:7 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Exposure_Number:8 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:9 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:10 ! Section 6.5 Target_Name:DDO155 Config:WFPC2 Opmode:IMAGE Aperture:WF3-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Visit_Number:4 Visit_Requirements: ! Section 7.1 ORIENTation 45D TO 70D On_Hold_Comments: Visit_Comments: Exposure_Number:1 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements: ! Section 7.2 Exposure_Number:2 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:900S Special_Requirements:POS TARG 0.2, 0.2 ! Section 7.2 Exposure_Number:3 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.15, 0.05 ! Section 7.2 Exposure_Number:4 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F439W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:1100S Special_Requirements:POS TARG 0.35, 0.25 ! Section 7.2 Exposure_Number:5 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:6 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:7 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F555W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Exposure_Number:8 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements: ! Section 7.2 Exposure_Number:9 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.233, 0.067 ! Section 7.2 Exposure_Number:10 ! Section 6.5 Target_Name:DDO216 Config:WFPC2 Opmode:IMAGE Aperture:WFALL-FIX Sp_Element:F814W Wavelength: Optional_Parameters:CR-SPLIT=NO Number_of_Iterations:1 Time_Per_Exposure:600S Special_Requirements:POS TARG 0.067, 0.233 ! Section 7.2 Data_Distribution ! Defaults indicated; change if desired Medium: 8MM ! 8MM or 6250BPI or 1600BPI Blocking_Factor: 10 ! 10 or 1 ! Only astronomers with very old 9- ! track tape drives should consider ! a blocking factor of 1 Ship_To: PI_Address ! STSCI or PI_Address or ! PI Address from Phase I is: ! ! ! Ship_Via: UPS ! UPS (2-day) or OVERNIGHT ! Overnight shipping done at PI expense Recipient_Email: ! Needed if Ship_To: is not PI_Address ! ! 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