The RoboPol sample of optical polarimetric standards
Artikel i vetenskaplig tidskrift, 2023
Context. Optical polarimeters are typically calibrated using measurements of stars with known and stable polarization parameters. However, there is a lack of such stars available across the sky. Many of the currently available standards are not suitable for medium and large telescopes due to their high brightness. Moreover, as we find, some of the polarimetric standards used are in fact variable or have polarization parameters that differ from their cataloged values. Aims. Our goal is to establish a sample of stable standards suitable for calibrating linear optical polarimeters with an accuracy down to 10-3 in fractional polarization. Methods. For 4 yr, we have been running a monitoring campaign of a sample of standard candidates comprised of 107 stars distributed across the northern sky. We analyzed the variability of the linear polarization of these stars, taking into account the non-Gaussian nature of fractional polarization measurements. For a subsample of nine stars, we also performed multiband polarization measurements. Results. We created a new catalog of 65 stars (see Table 2) that are stable, have small uncertainties of measured polarimetric parameters, and can be used as calibrators of polarimeters at medium and large telescopes.
Techniques: polarimetric
Polarization
Standards
Författare
D. Blinov
Idryma Technologias kai Erevnas (FORTH)
Panepistimio Kritis
S. Maharana
Inter-University Centre for Astronomy and Astrophysics
South African Astronomical Observatory
Idryma Technologias kai Erevnas (FORTH)
F. Bouzelou
Panepistimio Kritis
C. Casadio
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
E. Gjerløw
Universitetet i Oslo
J. Jormanainen
Turun Yliopisto
S. Kiehlmann
Idryma Technologias kai Erevnas (FORTH)
Panepistimio Kritis
J. A. Kypriotakis
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
I. Liodakis
Turun Yliopisto
N. Mandarakas
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
L. Markopoulioti
Panepistimio Kritis
Georgia Panopoulou
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
V. Pelgrims
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
A. Pouliasi
University of California
S. Romanopoulos
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
R. Skalidis
Idryma Technologias kai Erevnas (FORTH)
California Institute of Technology (Caltech)
R. M. Anche
University of Arizona
South African Astronomical Observatory
E. Angelakis
University of Athens
J. Antoniadis
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
B. J. Medhi
Gauhati University
T. Hovatta
Turun Yliopisto
Andrzej J. Kus
Uniwersytet Mikolaja Kopernika
N. Kylafis
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
A. Mahabal
California Institute of Technology (Caltech)
I. Myserlis
Max-Planck-Gesellschaft
Institut de Radioastronomie Millimétrique (IRAM)
E. Paleologou
Idryma Technologias kai Erevnas (FORTH)
Panepistimio Kritis
I. Papadakis
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
V. Pavlidou
Idryma Technologias kai Erevnas (FORTH)
Panepistimio Kritis
I. Papamastorakis
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
T. J. Pearson
California Institute of Technology (Caltech)
S. B. Potter
University of Johannesburg
South African Astronomical Observatory
A. N. Ramaprakash
Idryma Technologias kai Erevnas (FORTH)
California Institute of Technology (Caltech)
Inter-University Centre for Astronomy and Astrophysics
A. C.S. Readhead
California Institute of Technology (Caltech)
P. Reig
Panepistimio Kritis
Idryma Technologias kai Erevnas (FORTH)
A. Słowikowska
Uniwersytet Mikolaja Kopernika
JOINT INSTITUTE FOR V.L.B.I. IN EUROPE (J.I.V.E.)
Konstantinos Tassis
Idryma Technologias kai Erevnas (FORTH)
Panepistimio Kritis
A.J. Zensus
Max-Planck-Gesellschaft
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 677 A144Ämneskategorier
Fjärranalysteknik
Astronomi, astrofysik och kosmologi
Atom- och molekylfysik och optik
DOI
10.1051/0004-6361/202346778