! Proposal 6280, submission 1
! PI: WESTPHAL, JAMES
! Received Sun Apr  9 20:57:48 EDT 1995
! From: spe@hellas.gps.caltech.edu
Proposal_Information

   Title:               PLANETARY NEBULAR STRUCTURE (WC03): CYCLE 5
   Proposal_Category:   GTO/WFC
   Scientific_Category: INTERSTELLAR MEDIUM
   Cycle:               5


Investigators

   PI_name:             WESTPHAL, JAMES
   PI_Institution:      CALTECH
   CoI_Name:            Code, Arthur C.
   CoI_Institution:     Univ Wisconsin Washburn Observatory
   Contact:             Westphal


Questions

   Observing_Description:
   Real_Time_Justification:
   Calibration_Justification:
   Additional_Comments: 


Abstract:               Observations of planetary nebulae utilizing the WF/PC are based upon the high
                        angular resolution achievable. Seeing limited images of NGC 7293 the Helix
                        Nebula resolve structures down to the order of E+15 cm. At 0.1 arcsec
                        resolution, structures as small as E+14 to E+15 cm should be resolvable in a
                        number of planetary nebulae. At these dimensions velocities of a few km/sec
                        correspond to transit times of less than 100 years yet some of these
                        condensations occur as filaments some 10 to 100 times the narrow width. What
                        accounts for these "long lived" condensations? Can they be explained as
                        ionization structures, shock fronts or successive shell ejections? Is there a
                        pattern of mass loss as polar plumes or equatorial disks or magnetic
                        containment? The possibility of addressing these aspects of stellar mass loss
                        are tremendously enhanced by the resolution possible with WF/PC. The other
                        objective of this program is to repeat the measurements on a few  years
                        baseline in order to study the temporal variations of well defined
                        condensation. This may provide distance determinations as well as dynamical
                        information. The targets/filters are: NGC7293, NGC246 and NGC1360 with F656N
                        and F658N which will isolate H-Alpha and [NII] respectively. NGC7293,
                        NGC6853 and NGC 7027 are reobserved with F656N.


Fixed_Targets
!
!   Target_Number:       1
!   Target_Name:         NGC7293
!   Alternate_Names:     HELIX-NEB.
!   Description:         ISM,PLANETARY NEBULA,
!   Position:            RA=22H 29M 36.1S +/- 0.100S,
!                        DEC= -20D 47' 11.0" +/-  1.00"
!   Equinox:             J2000
!   Epoch:               
!   Rv_or_z:             
!   RA_PM:               0.0
!   Dec_PM:              0.0
!   Annual_Parallax:     0.0
!   Flux:                
!   Comments:            PLANETARY NEBULA
!
   Target_Number:       2
   Target_Name:         NGC6853
   Alternate_Names:     
   Description:         ISM,PLANETARY NEBULA,
   Position:            RA=19H 59M 32.5S +/- 0.100S,
                        DEC= 22D 43' 11.0" +/-  1.00"
   Equinox:             J2000
   Epoch:               
   Rv_or_z:             
   RA_PM:               0.0
   Dec_PM:              0.0
   Annual_Parallax:     0.0
   Flux:                
   Comments:            PLANETARY NEBULA
!
!   Target_Number:       3
!   Target_Name:         NGC246
!   Alternate_Names:     
!   Description:         ISM,PLANETARY NEBULA,
!   Position:            RA=0H 47M 0.9S +/- 0.100S,
!                        DEC= -11D 52' 37.0" +/-  1.00"
!   Equinox:             J2000
!   Epoch:               
!   Rv_or_z:             
!   RA_PM:               0.0
!   Dec_PM:              0.0
!   Annual_Parallax:     0.0
!   Flux:                
!   Comments:            PLANETARY NEBULA
!
!   Target_Number:       4
!   Target_Name:         NGC1360
!   Alternate_Names:     
!   Description:         ISM,PLANETARY NEBULA,
!   Position:            RA=3H 33M 13.7S +/- 0.100S,
!                        DEC= -25D 51' 34.0" +/-  1.00"
!   Equinox:             J2000
!   Epoch:               
!   Rv_or_z:             
!   RA_PM:               0.0
!   Dec_PM:              0.0
!   Annual_Parallax:     0.0
!   Flux:                
!   Comments:            PLANETARY NEBULA
!
   Target_Number:       5
   Target_Name:         NGC7027
   Alternate_Names:     
   Description:         ISM,PLANETARY NEBULA,
   Position:            RA=21H 7M 1.7S +/- 0.100S,
                        DEC= 42D 14' 10.0" +/-  1.00"
   Equinox:             J2000
   Epoch:               
   Rv_or_z:             
   RA_PM:               0.0
   Dec_PM:              0.0
   Annual_Parallax:     0.0
   Flux:                
   Comments:            PLANETARY NEBULA


Solar_System_Targets


Generic_Targets


Scan_Data


Visits

Visit_Number:           01
Visit_Requirements:     
On_Hold_Comments:       

   ! From Line 15
   Exposure_number:     10
   Target_Name:         NGC6853
   Config:              WFPC2
   Opmode:              IMAGE
   Aperture:            WFALL
   Sp_Element:          F656N
   Wavelength:          
   Optional_Parameters: CR-TOLERANCE=0.0, CR-SPLIT=0.5
   Number_of_iterations:1
   Time_Per_Exposure:   2000S
   Special_Requirements:
   Comments:            

Visit_Number:           02
Visit_Requirements:     
On_Hold_Comments:       

   ! From Line 16
   Exposure_number:     10
   Target_Name:         NGC7027
   Config:              WFPC2
   Opmode:              IMAGE
   Aperture:            WFALL
   Sp_Element:          F656N
   Wavelength:          
   Optional_Parameters: CR-TOLERANCE=0.0, CR-SPLIT=0.5
   Number_of_iterations:1
   Time_Per_Exposure:   2000S
   Special_Requirements:
   Comments:            


Data_Distribution

   Medium:              8MM
   Blocking_Factor:     10
   Ship_To:             PI_Address
   Ship_Via:            UPS
   Recipient_Email: