! Proposal 6917, submission 1 ! PI: KORATKAR, ANURADHA ! Received Tue Mar 26 11:59:39 EST 1996 ! From: workman@stsci.edu Proposal_Information Title: CYCLE 6 - FOS POLARIMETRY CALIBRATION Proposal_Category: CAL/FOS Scientific_Category: Cycle: 6 Investigators PI_name: ANURADHA KORATKAR PI_Institution: SPACE TELESCOPE SCIENCE INSTITUTE CoI_Name: Keyes, Charles CoI_Institution: STScI Baltimore CoI_Name: Hayes, Jeffrey CoI_Institution: STScI Baltimore CoI_Name: Dahlem, Michael CoI_Institution: STScI Baltimore CoI_Name: Christensen, Jennifer CoI_Institution: STScI Baltimore CoI_Name: Martin, Stephan CoI_Institution: STScI Baltimore CoI_Name: Storrs, Alex CoI_Institution: STScI Baltimore Contact: Abstract: We will determine the most useful spectropolarimetric modes of the FOS. To acheive this goal we will determine the locations of the polarization spectra, the transmission of the polarizer, the angles of the Wollaston prisms and waveplates in celestial coordinates, and the instrumental polarization. The G190H, G270H, G400H gratings in combination with the FOS Blue detector and 1.0 aperture will be calibrated. Questions Observing_Description: Part 1. Measurements of the internal Pt-Ne lamps will be used to locate the two oppositely polarized spectra that occur with the polarimeter. The positions of the split spectra will be compared to those of spectra taken without the polarimeter. The data will be used to determine a wavelength scale for the most commonly used modes of the polarimeter. (VISIT 1) Part 2. The wavelength scale with the new Y-balance values will be checked. (VISIT 2) Part 3. The instrumental polarization, flat-field corrections, and throughput of the polarimeter will be measured by observing the polarimetric and photometric standard BD+28D4211. (VISIT 3) Part 3. The angles of the Wollastons and waveplates will be measured in celestial coordinates by observing a polarized standard (BD+64D106) with the FOS/BL y-axis at north position angle about 86.4 deg. (VISIT 4) Note: Observations in Parts 1 and 2 can be done in parallel with another instrument prime or in occultation. The observations in Part 1 must precede those in Parts 2, 3 and 4. At least two weeks should be allowed after the data from Part 1 are in hand before scheduling Parts 2, 3 and 4. It is preferable for Part 3 to occur before Part 4, but it is not essential. All observations are minimum plan. Pointing stability of 10% of the smallest aperture used (i.e. 0.1") is required. Note that for the y-base maps with the polarizer (Part 1), the map is normally centered on the y-base for the lower of the two polarization spectra. We have therefore broken the maps into two segments, one to be centered on the lower spectrum, and one to be centered on the upper. The lower will use the default Y value, while the upper should be +750 Y-units from the lower. Polarimetric observations need to be taken as a single sequence of observations. Changes in background, position angle of the spacecraft, and other variables can all adversely affect the results. This test is stray light sensitive. Real_Time_Justification: Calibration_Justification: Additional_Comments: Fixed_Targets Target_Number: 1 Target_Name: BD+64D106 Alternate_Names: GSC4025-1481 Description: CALIBRATION,POLARIMETRY, Position: RA=0H 57M 36.705S +/- 0.250S, DEC= 64D 51' 35.05" +/- 0.25", PLATE-ID=00MB Equinox: J2000 Epoch: 1983.95 Rv_or_z: RA_PM: 0.0 Dec_PM: 0.0 Annual_Parallax: 0.0 Flux: V = 10.3 +/- 0.5 Comments: Target_Number: 2 Target_Name: BD+28D4211 Alternate_Names: GSC 2214-1198 Description: CALIBRATION,PHOTOMETRIC, Position: RA=21H 51M 11.1S +/- 0.010S, DEC= 28D 51' 51.8" +/- 0.20", PLATE-ID=01LR Equinox: J2000 Epoch: Rv_or_z: RA_PM: 0.0 Dec_PM: 0.0 Annual_Parallax: 0.0 Flux: V = 10.53 +/- 0.05, B = 10.19 +/- 0.05 Comments: Solar_System_Targets Generic_Targets Scan_Data Visits Visit_Number: 01 Visit_Requirements: On_Hold_Comments: CAN BE SCHEDULED DURING OCCULTATION Exposure_number: 10 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G270H Wavelength: Optional_Parameters: Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 24S Special_Requirements: Comments: Exposure_number: 20 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G270H,POL0-B Wavelength: Optional_Parameters: Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 2M Special_Requirements: Comments: FOR LOWER SPECTRUM OF POLARIZATION PAIR. Exposure_number: 30 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G270H,POL0-B Wavelength: Optional_Parameters: Y-OFFSET=750, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 2M Special_Requirements: Comments: FOR UPPER SPECTRUM OF POLARIZATION PAIR. Exposure_number: 40 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G190H Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 56S Special_Requirements: Comments: Exposure_number: 50 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G190H,POL0-B Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 280S Special_Requirements: Comments: FOR LOWER SPECTRUM OF POLARIZATION PAIR. Exposure_number: 60 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G190H,POL0-B Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-OFFSET=750, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 280S Special_Requirements: Comments: FOR UPPER SPECTRUM OF POLARIZATION PAIR. Exposure_number: 70 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G400H Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 56S Special_Requirements: Comments: Exposure_number: 80 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G400H,POL0-A Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 280S Special_Requirements: Comments: FOR LOWER SPECTRUM OF POLARIZATION PAIR. Exposure_number: 90 Target_Name: WAVE Config: FOS/BL Opmode: IMAGE Aperture: 0.3 Sp_Element: G400H,POL0-A Wavelength: Optional_Parameters: STEP-TIME=2.33, Y-OFFSET=750, Y-SPACE=24, Y-SIZE=24, SUB-STEP=1 Number_of_iterations:1 Time_Per_Exposure: 281S Special_Requirements: Comments: FOR UPPER SPECTRUM OF POLARIZATION PAIR. ! Visit_Number: 02 Visit_Requirements: AFTER 1 BY 14D TO 120D Visit_Comments: NEEDS Instrument Scientist INPUT FROM VISIT 1 Exposure_number: 10 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G270H Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Exposure_number: 20 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G270H,POL0-B Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Exposure_number: 30 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G190H Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Exposure_number: 40 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G190H,POL0-B Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Exposure_number: 50 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G400H Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Exposure_number: 60 Target_Name: WAVE Config: FOS/BL Opmode: ACCUM Aperture: 0.3 Sp_Element: G400H,POL0-A Wavelength: Optional_Parameters: Number_of_iterations:1 Time_Per_Exposure: DEF Special_Requirements: Comments: Visit_Number: 03 Visit_Requirements: AFTER 1 BY 14D TO 30D Visit_Comments: NEEDS Instrument Scientist INPUT FROM VISIT 1 Exposure_number: 10 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-X=1.204 SCAN-STEP-Y=1.204 SEARCH-SIZE-X=1 SEARCH-SIZE-Y=3 Number_of_iterations:1 Time_Per_Exposure: 1S Special_Requirements:ONBOARD ACQ FOR 20 Comments: ACQ SEQUENCE ADAPTED FROM 5579 Exposure_number: 20 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 1.0 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.602 SCAN-STEP-X=0.602 SEARCH-SIZE-Y=2 SEARCH-SIZE-X=6 Number_of_iterations:1 Time_Per_Exposure: 1S Special_Requirements:ONBOARD ACQ FOR 30 Comments: Exposure_number: 30 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.172 SCAN-STEP-X=0.172 SEARCH-SIZE-Y=5 SEARCH-SIZE-X=5 Number_of_iterations:1 Time_Per_Exposure: 2S Special_Requirements:ONBOARD ACQ FOR 40 Comments: Exposure_number: 40 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.052 SCAN-STEP-X=0.052 SEARCH-SIZE-Y=5 SEARCH-SIZE-X=5 Number_of_iterations:1 Time_Per_Exposure: 2S Special_Requirements:ONBOARD ACQ FOR 50-70 Comments: Exposure_number: 50 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G400H Wavelength: Optional_Parameters: POLSCAN=16A Number_of_iterations:1 Time_Per_Exposure: 740S Special_Requirements:MAX DUR Comments: Exposure_number: 55 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G400H Wavelength: Optional_Parameters: POLSCAN=16A Number_of_iterations:1 Time_Per_Exposure: 1580S Special_Requirements:MAX DUR Comments: Exposure_number: 60 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G190H Wavelength: Optional_Parameters: POLSCAN=16B Number_of_iterations:2 Time_Per_Exposure: 1540S Special_Requirements:MAX DUR Comments: Exposure_number: 70 Target_Name: BD+28D4211 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G270H Wavelength: Optional_Parameters: POLSCAN=16B Number_of_iterations:2 Time_Per_Exposure: 1540S Special_Requirements:MAX DUR Comments: ! Visit_Number: 04 Visit_Requirements: AFTER 1 BY 14D TO 30D ORIENT 92D TO 97D Visit_Comments: NEEDS Instrument Scientist input from Visit 1 Exposure_number: 10 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 4.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=1.204 SEARCH-SIZE-X=1 SEARCH-SIZE-Y=3 Number_of_iterations:1 Time_Per_Exposure: 1S Special_Requirements:ONBOARD ACQ FOR 20 Comments: ACQ SEQUENCE ADAPTED FROM 5579 Exposure_number: 20 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 1.0 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.602 SCAN-STEP-X=0.602 SEARCH-SIZE-Y=2 SEARCH-SIZE-X=6 Number_of_iterations:1 Time_Per_Exposure: 1S Special_Requirements:ONBOARD ACQ FOR 30 Comments: Exposure_number: 30 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.172 SCAN-STEP-X=0.172 SEARCH-SIZE-Y=5 SEARCH-SIZE-X=5 Number_of_iterations:1 Time_Per_Exposure: 2S Special_Requirements:ONBOARD ACQ FOR 40 Comments: Exposure_number: 40 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACQ/PEAK Aperture: 0.3 Sp_Element: G570H Wavelength: Optional_Parameters: SCAN-STEP-Y=0.05 SCAN-STEP-X=0.05 SEARCH-SIZE-Y=5 SEARCH-SIZE-X=5 Number_of_iterations:1 Time_Per_Exposure: 2S Special_Requirements:ONBOARD ACQ FOR 50-70 Comments: Exposure_number: 50 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G400H Wavelength: Optional_Parameters: POLSCAN=16A Number_of_iterations:1 Time_Per_Exposure: 900S Special_Requirements:MAX DUR Comments: Exposure_number: 55 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G400H Wavelength: Optional_Parameters: POLSCAN=16A Number_of_iterations:1 Time_Per_Exposure: 1640S Special_Requirements:MAX DUR Comments: Exposure_number: 60 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G190H Wavelength: Optional_Parameters: POLSCAN=16B Number_of_iterations:2 Time_Per_Exposure: 1600S Special_Requirements:MAX DUR Comments: Exposure_number: 70 Target_Name: BD+64D106 Config: FOS/BL Opmode: ACCUM Aperture: 1.0 Sp_Element: G270H Wavelength: Optional_Parameters: POLSCAN=16B Number_of_iterations:2 Time_Per_Exposure: 1600S Special_Requirements:MAX DUR Comments: Data_Distribution Medium: 8MM Blocking_Factor: 10 Ship_To: PI_Address Ship_Via: UPS Recipient_Email: