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Hubble Space Telescope
Phase II Example: NICMOS Polarimetry

Phase II Polarimetry Example

The following Phase II example for Camera 2 includes a four position dither pattern. A dither stepping of N + 1/2 pixel offsets, where N = 10-50 pixels, is recommended. An image is obtained in each quadrant of the detector. In addition, a pattern orient of 0.11 deg is specified to achieve a 1/4 shift over 128.5 pixels. The Camera 2 scale is ~0.076"/pixel.

Pattern_Data


Pattern_Number: 1 Primary_Pattern: Pattern_Type: NIC-SPIRAL-DITH Pattern_Purpose: DITHER Number_Of_Points: 4 Point_Spacing: 9.766 Coordinate_Frame: POS-TARG Pattern_Orient: 0.11 Center_Pattern:
Exposure_Number: 10 Target_Name: R-Mon Config: NIC2 Opmode: MULTIACCUM Aperture: NIC2-FIX Sp_Element: POL0L Wavelength: Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12 Number_of_Iterations: 2 Time_Per_Exposure: DEF Special_Requirements: POS TARG -4.902,-4.902 PATTERN 1 10-30 Comments: exp=95.945 sec
Exposure_Number: 20 Target_Name: R-Mon Config: NIC2 Opmode: MULTIACCUM Aperture: NIC2-FIX Sp_Element: POL120L Wavelength: Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12 Number_of_Iterations: 2 Time_Per_Exposure: DEF Special_Requirements: POS TARG -4.902,-4.902 Comments: exp=95.945 sec
Exposure_Number: 30 Target_Name: R-Mon Config: NIC2 Opmode: MULTIACCUM Aperture: NIC2-FIX Sp_Element: POL240L Wavelength: Optional_Parameters: SAMP-SEQ=STEP16,NSAMP=12 Number_of_Iterations: 2 Time_Per_Exposure: DEF Special_Requirements: POS TARG -4.902,-4.902 Comments: exp=95.945 sec