Vilppu Piirola
 
| 
 piirola@utu.fi Väisäläntie 20 Kaarina ORCID identifier: https://orcid.org/0000-0003-0186-206X | 
 Publications  
  
            - A Two-week IXPE Monitoring Campaign on Mrk 421  (2025)  - Astrophysical Journal
 
 (A1 Refereed original research article in a scientific journal)
- High Optical-to-X-Ray Polarization Ratio Reveals Compton Scattering in BL Lacertae’s Jet  (2025)  - Astrophysical Journal Letters
 
 (A1 Refereed original research article in a scientific journal)
- High-precision broadband linear polarimetry of early-type binaries V. The binary system HD 165052 in the open cluster NGC 6530  (2025)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- IXPE observation of the low-synchrotron peaked blazar S4 0954+65 during an optical-X-ray flare  (2025)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Characterization of High-polarization Stars and Blazars with DIPOL-1 at Sierra Nevada Observatory  (2024)  - The Astronomical Journal
 
 (A1 Refereed original research article in a scientific journal)
- IOP4, the Interactive Optical Photo-Polarimetric Python Pipeline  (2024)  - The Astronomical Journal
 
 (A1 Refereed original research article in a scientific journal)
- Searching for magnetic fields in featureless white dwarfs with the DIPOL-UF polarimeter at the Nordic Optical Telescope  (2024)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Studying geometry of the ultraluminous X-ray pulsar Swift J0243.6+6124 using X-ray and optical polarimetry  (2024)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- X-Ray and Multiwavelength Polarization of Mrk 501 from 2022 to 2023  (2024)  - Astrophysical Journal
 
 (A1 Refereed original research article in a scientific journal)
- Discovery of magnetic fields in five DC white dwarfs  (2023)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- High-precision broadband linear polarimetry of early-type binaries : III. AO Cassiopeiae revisited  (2023)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- High-precision broadband linear polarimetry of early-type binaries: IV. The DH Cephei binary system in the open cluster of NGC 7380  (2023)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Limiting the accretion disc light in two mass transferring hot subdwarf binaries  (2023)  - Monthly Notices of the Royal Astronomical Society
 
 (A1 Refereed original research article in a scientific journal)
- Optical polarization monitoring of the black-hole candidate Swift J1727.8-1613 #16245  (2023)  Astronomer’s Telegram Kravtsov V., Nitindala A. P., Veledina A., Berdyugin A., Poutanen J., Piirola V.
 (D2 Article in a professional compilation book)
- Peering into the tilted heart of Cyg X-1 with high-precision optical polarimetry  (2023)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Black hole spin-orbit misalignment in the x-ray binary MAXI J1820+070  (2022)  - Science
 
 (A1 Refereed original research article in a scientific journal)
- Highly sensitive search for magnetic fields in white dwarfs using broad-band circular polarimetry  (2022)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Optical polarization signatures of black hole X-ray binaries  (2022)  - Monthly Notices of the Royal Astronomical Society
 
 (A1 Refereed original research article in a scientific journal)
- Polarimetry of M-type asteroids in the context of their surface composition  (2022)  - Astronomy and Astrophysics
 
 (A1 Refereed original research article in a scientific journal)
- Whence the Interstellar Magnetic Field Shaping the Heliosphere?  (2022)  - Astrophysical Journal Supplement
 
 (A1 Refereed original research article in a scientific journal)




