! Proposal 6406, submission 1
! PI: Dr. Deidre Hunter
! Received Wed Feb  7 14:30:42 EST 1996
! From: dah@lowell.edu
! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template
! $Id: 6406,v 4.1 1997/05/02 17:38:33 pepsa Exp $
! Hubble Space Telescope Cycle 6 (1996) Phase II Proposal Template
! $Id: 6406,v 4.1 1997/05/02 17:38:33 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: Lucas
!             Phone: 410-338-4716    , E-mail: lucas@stsci.edu
!
! This partially completed template was generated from a Phase I proposal.
! Name of Phase I Proposal: archive-0011.hunter.prop
! Date generated: Fri Dec 22 16:25:32 EST 1995
!

Proposal_Information                           ! Section 4
              Title:  Intermediate Mass Stars and Unusual
                      Stellar Mass Limits in a Starburst Galaxy
  Proposal_Category:  GO
Scientific_Category:  GALAXIES & CLUSTERS
             Cycle:    6

Investigators
     PI_name:         Dr. Deidre Hunter
     PI_Institution:  Lowell Observatory


Abstract:                                ! Free format text (please update)
    The dwarf irregular galaxy IC10 is the nearest
    example of the global starburst phenomenum. As such, it offers
    a unique opportunity to test ideas about the star formation
    process in such an environment. In particular it has been
    suggested that starburst galaxies, have unusually high lower
    stellar mass limits (up to 10 Msolar) and/or unusual IMF's.
    We propose to determine the IMF of intermediate mass stars and
    determine or constrain the lower stellar mass limit in IC10
    through star counts. This will be the first direct examination
    of the intermediate stellar mass population in a starburst
    galaxy. H-alpha images obtained to subtract the gaseous
    contamination of the broad-band filters will also be used to
    examine the gaseous destruction caused by the concentrations
    of massive stars in the heart of the galaxy.

Questions                       ! Free format text (please update)

     Observing_Description:
         IC10 has a reddening of E(B-V)=0.75 and a distance modulus of
         24.9 (Massey & Armandroff 1995). Thus, a 5 Msolar star (M_V=
         -0.4) will have an apparent V magnitude of 27 in IC10. We
         have determined the exposure times necessary to reach this
         magnitude by scaling from images of IZw18 obtained by a
         previous program (Hunter & Thronson 1995). Taking reddening
         into account, we find that we will need 10*1400 s each in
         F555W and F814W. Experience with IZw18 showed that coincident
         cosmic rays were a sufficient problem that 3 long exposures
         was not adequate to remove cosmic rays. However, 10 will be
         fine. The F336W filter is used as a check on the reddening,
         and, because of the red leak, is only useful for the bluer,
         and hence brighter, stars. Therefore, the exposure in F336W
         is shorter: 3*800 s. An orbit for IC10 is approximately 58
         minutes. With overheads, these exposures will fill 11 orbits.
         A 12th orbit is used for the H-alpha image, taken through
         F656N, with an exposure time of 3*800 s. The H-alpha image
         will be used to subtract gaseous emission contaminating the
         broad-band images.

   Real_Time_Justification:

!         Observations of the intermediate stellar mass population and
!         their initial mass functions have been made of the young
!         regions R136, NGC604, and NGC206. These will be useful as
!         comparisons to the IC10 results.


Calibration_Justification:              ! Move appropriate text from Real_Time_Justification

      Additional_Comments:


Fixed_Targets                           ! Section 5.1
  Target_Number: 1
    Target_Name: IC10
Alternate_Names:
    Description: GALAXY,STARBURST
       Position: 
                 RA=00H 20M 24.40S +/- 0.1S,
                 DEC=+59D 17' 57.9" +/- 1",
                 PLATE-ID=01MT
        Equinox: 2000
        RV_or_Z: V=-345
          RA_PM:                        ! Units are seconds of time per year
         Dec_PM:                        ! Units are seconds of arc per year
          Epoch:
Annual_Parallax:
           Flux: V=27,E(B-V)=0.75,U-V=-0.7
       Comments:

! 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 264D TO 301D

! Uncomment or copy visit level special requirements needed
! Most of these requirements (including ORIENT) will limit scheduling

        ! GROUP <visit-list> WITHIN <time>
        ! SEQ <visit-list> WITHIN <time>

  On_Hold_Comments:
    Visit_Comments: TAC: "Should use the CVZ (hence 6 orbits allocated instead
                    of 12). STScI should restore this to 12 orbits if CVZ or
                    near-CVZ orbits cannot be scheduled." This file is for 12 
                    orbits since the CVZ restriction severely restricts the
                    scheduling and since it requires 6.5 CVZ orbits.
                    To calculate ORIENT: Assumed rotation was around center of
                    PC (PC1-FIX). Took position angle of
                    +X PC axis and added 45. The position and orientation are
                    chosen to avoid a 13.3 mag star, avoid the brightest Milky
                    Way stars in and around the galaxy, and allow part of 
                    the FOV to extend to the edge of the galaxy.
                    The 13.3 mag star will add background to
                    part of the PC through stray light since it is inside the 
                    missing L, but there is no way to put it outside the L and
                    prediction is for less than 1 DN/pixel. These requirements
                    restrict the ORIENT which in turn severely restricts
                    scheduling, but they are essential. Even so, there
                    will also be some stars as bright as 16 in the WF chips
                    which will saturate heavily. 

     Exposure_Number: 1
         Target_Name: IC10
              Config: WFPC2
              Opmode: IMAGE
            Aperture: PC1-FIX
          Sp_Element: F656N
          Wavelength:
 Optional_Parameters: CR-SPLIT=NO,ATD-GAIN=7
Number_of_Iterations: 3
   Time_Per_Exposure: 800S
Special_Requirements:                   ! Section 7.2

     Exposure_Number: 2
         Target_Name: IC10
              Config: WFPC2
              Opmode: IMAGE
            Aperture: PC1-FIX
          Sp_Element: F555W
          Wavelength:
 Optional_Parameters: CR-SPLIT=NO,ATD-GAIN=7
Number_of_Iterations: 10
   Time_Per_Exposure: 1400S
Special_Requirements:                   ! Section 7.2

      Visit_Number: 2
Visit_Requirements:                     ! Section 7.1
                    SAME ORIENTation AS 1
                    
        ! GROUP <visit-list> WITHIN <time>
        ! PERIOD <time> AND ZERO-PHASE <date>
        ! SEQ <visit-list> WITHIN <time>
        ! ON HOLD [FOR <visit-list>]

  On_Hold_Comments:
    Visit_Comments: I have broken these 12 orbits into 2 visits because
                    of the SAA interruption after 8 orbits. However, I am 
                    after color information on stars, will be stacking all
                    the images from each filter, and will be subtracting the
                    Halpha image from the other filters. So, I need all of 
                    the images to be at the same orientation and position.
                    THEREFORE, *PLEASE* USE THE EXACT SAME GUIDE STARS AND
                    SET UP FOR VISIT 2 THAT WERE USED FOR VISIT 1. Thank
                    you.

     Exposure_Number: 3
         Target_Name: IC10
              Config: WFPC2
              Opmode: IMAGE
            Aperture: PC1-FIX
          Sp_Element: F336W
          Wavelength:
 Optional_Parameters: CR-SPLIT=NO,ATD-GAIN=7
Number_of_Iterations: 3
   Time_Per_Exposure: 800S
Special_Requirements:                   ! Section 7.2

     Exposure_Number: 4
         Target_Name: IC10
              Config: WFPC2
              Opmode: IMAGE
            Aperture: PC1-FIX
          Sp_Element: F814W
          Wavelength:
 Optional_Parameters: CR-SPLIT=NO,ATD-GAIN=7
Number_of_Iterations: 10
   Time_Per_Exposure: 1400S
Special_Requirements:                   ! Section 7.2

! Uncomment or copy exposure level special requirements needed

        ! INTeractive ACQuisition FOR <exp-list>
        ! ONBOARD ACQuisition FOR <exp-list>
        ! SAVE OFFSET <id>
        ! USE OFFSET <id>
        ! POSition TARGet <x-value>,<y-value>
        ! SAME POSition AS <exp>
        ! DO FOR TARGets <targ-list>    ! FGS only
        ! PARallel WITH <exp>
        ! GROUP-FGS <exp-list> WITHIN <time>
        ! SPATIAL SCAN <#> [<exp-list> | SINGLE-EXP ]
        ! RT ANALYSIS [FOR <exp-list>]
        ! REQuires UPLINK
        ! REQuires EPHEMeris CORRection <id>
        ! END ORBIT
        ! EXPAND
        ! LOW-SKY
        ! MAXimum DURation [<time> | <%>]
        ! MINimum DURation [<time> | <%>]
        ! NO SPLIT
        ! PHASE <number1[0,1]> TO <number2[0,1]>
        ! SEQuence <exp-list> NON-INTerruptible
        ! SHADOW

            Comments:

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 <free-text>
                                        ! PI Address from Phase I is:
                                        !
                                                 !  1400 West Mars Hill Road
                                                 !  Flagstaff
                                                 !  86001
                                        !
                                        !
       Ship_Via:        UPS             ! UPS (2-day) or OVERNIGHT
                                        ! Overnight shipping done at PI expense

Recipient_Email:                        ! Needed if Ship_To: is not PI_Address
                                        ! <free-text>

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! Please send a list of your likes and dislikes to your Program Coordinator