| Instrument |
| Instrument Name: | PolKa |
| Telescope: | APEX |
| Telescope Aperture: | 12m |
| Telescope Port: | Cassegrain |
| Status: | Operational |
| Commissioning Date: | |
| Polarimetry: | |
| Polarimetry Type: | submillimeter continuum polarimetry |
| Stokes Parameters: | I
Q
U |
| Wavelength Range: | 870 micron |
| Modulator Type: | Other |
| Modulator Type Other: |
rotating modulator (reflecting, tunable waveplate) |
| Modulation Frequency: |
6.24 Hz |
| Analyzer Type: | Wiregrid Beam-Splitter |
| Analyzer Type Other: |
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| Sensitivity: | ~ 100 mJy |
| Accuracy Zero Point: |
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| Accuracy Scaling: |
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| Imaging: | Yes |
| Wavelength Range: | 870 micron |
| Field of View: | 0.2 degree |
| Resolution: | 20 arcsec |
| Pixel Scale: | |
| Pixel Dimensions: | |
| Sensor Type: | semiconductor bolometer array |
| Limiting Magnitude: | |
| Coronograph: | No |
| Coronograph Type: | |
| Coronograph IWA: | |
| Adaptive Optics: | No |
| DM, Number of Actuators: | |
| DM Type: | |
| WFS Type: | |
| WFS Update frequency: | |
| Strehl: | |
| Limiting Magnitude: | |
| Spectroscopy: | No |
| Sampling: | |
| Wavelength Range: | |
| Spectral Resolution: | |
| Limiting Magnitude: | |
| Instrument Image: | |
| Instrument Image Caption: | |
| Instrument Reference Paper: | Wiesemeyer, H., Hezareh, T., Kreysa, E., et al., 2014, submitted to PASP, arXiv:1408.5100 |
| Known Issues: | Position angle encoder needs repair work, therefore PolKa is temporarily out of operation. |
| Instrument Contact: | H. Wiesemeyer, MPIfR Bonn |
| Instrument Website: | |
| Planned Upgrades: | |
| Science |
| Science Description: | |
| Target Types: | |
| Sample Image/Result: | |
| Sample image Caption: | |
| Sample Science Papers: | Alves, F., et al. 2014, A&A in press, arXiv:1408.5133 |
| Remarks: | |