Characterization of High-polarization Stars and Blazars with DIPOL-1 at Sierra Nevada Observatory

Autor: J. Otero-Santos, V. Piirola, J. Escudero Pedrosa, I. Agudo, D. Morcuende, A. Sota, V. Casanova, F. J. Aceituno, P. Santos-Sanz

Publikováno v: The Astronomical Journal, Vol 167, Iss 3, p 137 (2024)

We report here the performance and first results of the new multiband optical polarimeter DIPOL-1, installed at the Sierra Nevada Observatory 90 cm T90 telescope (SNO, Granada, Spain). DIPOL-1 is equipped with a plane parallel calcite plate and λ /2

Externí odkaz: https://doaj.org/article/1076f8b1114641249fd850de3bc1e37c

A Search for QPOs in the Blazar OJ287: Preliminary Results from the 2015/2016 Observing Campaign

Autor: S. Zola, M. Valtonen, G. Bhatta, A. Goyal, B. Debski, A. Baran, J. Krzesinski, M. Siwak, S. Ciprini, A. Gopakumar, H. Jermak, K. Nilsson, D. Reichart, K. Matsumoto, K. Sadakane, K. Gazeas, M. Kidger, V. Piirola, F. Alicavus, K. S. Baliyan, A. Berdyugin, D. Boyd, M. Campas Torrent, F. Campos, J. Carrillo Gómez, D. B. Caton, V. Chavushyan, J. Dalessio, D. Dimitrov, M. Drozdz, H. Er, A. Erdem, A. Escartin Pérez, V. Fallah Ramazani, A. V. Filippenko, F. Garcia, F. Gómez Pinilla, M. Gopinathan, J. B. Haislip, J. Harmanen, R. Hudec, G. Hurst, K. M. Ivarsen, M. Jelinek, A. Joshi, M. Kagitani, N. Kaur, W. C. Keel, A. P. LaCluyze, B. C. Lee, E. Lindfors, J. Lozano de Haro, J. P. Moore, M. Mugrauer, R. Naves Nogues, A. W. Neely, R. H. Nelson, W. Ogloza, S. Okano, J. C. Pandey, M. Perri, P. Pihajoki, G. Poyner, J. Provencal, T. Pursimo, A. Raj, R. Reinthal, S. Sadegi, T. Sakanoi, Sameer, J.-L. Salto González, T. Schweyer, F. C. Soldán Alfaro, N. Karaman, E. Sonbas, I. Steele, J. T. Stocke, J. Strobl, L. O. Takalo, T. Tomov, L. Tremosa Espasa, J. R. Valdes, J. Valero Pérez, F. Verrecchia, J. R. Webb, M. Yoneda, M. Zejmo, W. Zheng, J. Telting, J. Saario, T. Reynolds, A. Kvammen, E. Gafton, R. Karjalainen, P. Blay

Publikováno v: Galaxies, Vol 4, Iss 4, p 41 (2016)

We analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. No statistically significant p

Externí odkaz: https://doaj.org/article/aa4f4b4b35674be9ac64b06137047ad2

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Polarimetry of M-type asteroids in the context of their surface composition

Autor: I. Belskaya, A. Berdyugin, Yu. Krugly, Z. Donchev, A. Sergeyev, R. Gil-Hutton, S. Mykhailova, T. Bonev, V. Piirola, S. Berdyugina, M. Kagitani, T. Sakanoi

Aims. We aim to investigate how polarimetric observations can improve our understanding of the nature and diversity of M/X-type asteroids. Methods. Polarimetric observations of the selected M/X-type asteroids were carried out at the Tohoku 0.6-m tele

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0197b541740428434ab7af139d74c24

Whence the Interstellar Magnetic Field Shaping the Heliosphere?

Autor: P. C. Frisch, V. Piirola, A. B. Berdyugin, C. Heiles, A. Cole, K. Hill, A. M. Magalhães, S. J. Wiktorowicz, J. Bailey, D. V. Cotton, L. Kedziora-Chudczer, N. A. Schwadron, M. Bzowski, D. J. McComas, E. J. Zirnstein, H. O. Funsten, C. Harlingten, Seth Redfield

Publikováno v: The Astrophysical Journal Supplement Series. 259:48

Measurements of starlight polarized by aligned interstellar dust grains are used to probe the relation between the orientation of the ambient interstellar magnetic field (ISMF) and the ISMF traced by the ribbons of energetic neutral atoms discovered

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::77d539b278708d3305d0c88bc81d761d
https://doi.org/10.3847/1538-4365/ac5750