A Decade of Linear and Circular Polarimetry with the POLISH2 Polarimeter
| Autor: | Wiktorowicz, Sloane J., Słowikowska, Agnieszka, Nofi, Larissa A., Rider, Nicole, Wolfgang, Angie, Hermis, Ninos, Jontof-Hutter, Daniel, Bayless, Amanda J., Cole, Gary M., Crawford, Kirk B., Tsarev, Valeri V., Owens, Michael C., Jaramillo, Ernest G., Maul, Geoffrey A., Graham, James R., Millar-Blanchaer, Maxwell A., Bott, Kimberly, Mauerhan, Jon C. |
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| Rok vydání: | 2022 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/1538-4365/aca407 |
| Popis: | The POLISH2 optical polarimeter has been in operation at the Lick Observatory 3-m Shane telescope since 2011, and it was commissioned at the Gemini North 8-m in 2016. This instrument primarily targets exoplanets, asteroids, and the Crab pulsar, but it has also been used for a wide variety of planetary, galactic, and supernova science. POLISH2's photoelastic modulators, employed instead of rotating waveplates or ferro-electric liquid crystal modulators, offer the unprecedented ability to achieve sensitivity and accuracy of order 1 ppm (0.0001%), which are difficult to obtain with conventional polarimeters. Additionally, POLISH2 simultaneously measures intensity (Stokes I), linear polarization (Stokes Q and U), and circular polarization (Stokes V), which fully describe the polarization state of incident light. We document our laboratory and on-sky calibration methodology, our archival on-sky database, and we demonstrate conclusive detection of circular polarization of certain objects. Comment: 38 pages, 16 figures, accepted by ApJS |
| Databáze: | arXiv |
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