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3 results on '"Ariel Majcher"'

1. 'PI OF THE SKY' OFF-LINE EXPERIMENT WITH GLORIA

Author

Ariel Majcher, Arkadiusz Cwiek, Mikołaj Cwiok, Lech Mankiewicz, Marcin Zaremba, and Aleksander F. Zarnecki

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

GLORIA is the first free and open-access network of robotic telescopes in the world. Based on the Web 2.0 environment, amateur and professional users can do research in astronomy by observing with robotic telescope, and/or analyzing data acquired with GLORIA, or from other free access databases. The GLORIA project develops free standards, protocols and tools for controlling Robotic Telescopes and related instrumentation, for scheduling observations in the telescope network, and for conducting so-called off-line experiments based on the analysis of astronomical data. This contribution summarizes the implementation and results from the first research level off-line demonstrator experiment implemented in GLORIA, which was based on data collected with the “Pi of the Sky” telescope in Chile.

Published
2014
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2. 'Pi of the Sky' Detector

Author

Katarzyna Małek, Tadeusz Batsch, Henryk Czyrkowski, Mikołaj Ćwiok, Ryszard Dąbrowski, Wojciech Dominik, Grzegorz Kasprowicz, Ariel Majcher, Agnieszka Majczyna, Lech Mankiewicz, Krzysztof Nawrocki, Robert Pietrzak, Lech W. Piotrowski, Maria Ptasińska, Małgorzata Siudek, Marcin Sokołowski, Janusz Użycki, Piotr Wawer, Roman Wawrzaszek, Grzegorz Wrochna, Marcin Zaremba, and Aleksander F. Żarnecki

Subjects
Astronomy, QB1-991
Abstract

“Pi of the Sky” experiment has been designed for continuous observations of a large part of the sky, in search for astrophysical phenomena characterized by short timescales, especially for prompt optical counterparts of Gamma Ray Bursts (GRBs). Other scientific goals include searching for novae and supernovae stars and monitoring of blasars and AGNs activity. “Pi of the Sky” is a fully autonomous, robotic detector, which can operate for long periods of time without a human supervision. A crucial element of the detector is an advanced software for real-time data analysis and identification of short optical transients. The most important result so far has been an independent detection and observation of the prompt optical emission of the “naked-eye” GRB080319B.

Published
2010
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3. PSF modelling for very wide-field CCD astronomy

Author

Małgorzata Siudek, A. Majczyna, M. Zaremba, Ariel Majcher, Lech Wiktor Piotrowski, R. Dabrowski, T. Batsch, Marcin Sokolowski, Lech Mankiewicz, R. Opiela, Katarzyna Małek, Krzysztof Nawrocki, Grzegorz Kasprowicz, R. Wawrzaszek, M. Cwiok, Henryk Czyrkowski, Grzegorz Wrochna, and Aleksander Filip Zarnecki

Subjects
Point spread function, J.2, Physics - Instrumentation and Detectors, Pixel, Aperture, Computer science, media_common.quotation_subject, Astrophysics::Instrumentation and Methods for Astrophysics, Astronomy, FOS: Physical sciences, Astronomy and Astrophysics, Field of view, Instrumentation and Detectors (physics.ins-det), Astrophysics::Cosmology and Extragalactic Astrophysics, law.invention, Lens (optics), Photometry (optics), Stars, Space and Planetary Science, law, Sky, Gamma-ray burst, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), media_common
Abstract

One of the possible approaches to detecting optical counterparts of GRBs requires monitoring large parts of the sky. This idea has gained some instrumental support in recent years, such as with the "Pi of the Sky" project. The broad sky coverage of the "Pi of the Sky" apparatus results from using cameras with wide-angle lenses (20x20 deg field of view). Optics of this kind introduce significant deformations of the point spread function (PSF), increasing with the distance from the frame centre. A deformed PSF results in additional uncertainties in data analysis. Our aim was to create a model describing highly deformed PSF in optical astronomy, allowing uncertainties caused by image deformations to be reduced. Detailed laboratory measurements of PSF, pixel sensitivity, and pixel response functions were performed. These data were used to create an effective high quality polynomial model of the PSF. Finally, tuning the model and tests in applications to the real sky data were performed. We have developed a PSF model that accurately describes even very deformed stars in our wide-field experiment. The model is suitable for use in any other experiment with similar image deformation, with a simple tuning of its parameters. Applying this model to astrometric procedures results in a significant improvement over standard methods, while basic photometry precision performed with the model is comparable to the results of an optimised aperture algorithm. Additionally, the model was used to search for a weak signal -- namely a possible gamma ray burst optical precursor -- showing very promising results. Precise modelling of the PSF function significantly improves the astrometric precision and enhances the discovery potential of a wide-field system with lens optics., Accepted for publication in Astronomy and Astrophysics on 13 December 2012

Published
2013

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