Robotic telescopes for high energy astrophysics in Ondřejov

Nekola, Martin; Hudec, R.; Jelínek, M.; Kocka, M.; Kubánek, P.; Münz, F.; Polasek, C.; Šimon, V.; Štrobl, J.

doi:10.1007/s10686-010-9190-5

Cited by 11 publications

(9 citation statements)

References 3 publications

(3 reference statements)

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“…Our research reflects the needs for effective data processing from systems with complicated PSF or important role of noise like wide-field cameras or precise astronomical telescopes (e.g. MAIA [1], BART, D50 [2] and BOOTES [3]). A large amount of data is displaced because of big errors during data reduction (e.g.…”

Section: Introductionmentioning

confidence: 90%

Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems

Błażek¹,

Anisimova²,

Páta³

2011

Acta Polytech

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We report on our efforts to formulate algorithms for image signal processing with the spatially and time variant Point-Spread Function (PSF) and inhomogeneous noise of real imaging systems. In this paper we focus on application of the wavelet transform for denoising of the astronomical images with complicated conditions. They influence above all accuracy of the measurements and the new source detection ability. Our aim is to test the usefulness ofWavelet transform (as the standard image processing technique) for astronomical purposes.

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Section: Introductionmentioning

confidence: 90%

Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems

Błażek¹,

Anisimova²,

Páta³

2011

Acta Polytech

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“…Gor Oganesyan 1,2 , Sergey Karpov 4,5,6 , Martin Jelínek 7 , Gregory Beskin 5,6 , Samuele Ronchini 1,2 , Biswajit Banerjee 1,2 , Marica Branchesi 1,2,3 , Jan Štrobl 7 , Cyril Polášek 7 , René Hudec 7 , Eugeny Ivanov 8 , Elena Katkova 8 , Alexey Perkov 8 , Anton Biryukov 9,6 , Nadezhda Lyapshina 5 Vyacheslav Sasyuk 6 , Martin Mašek 4 , Petr Janeček 4 , Jan Ebr 4 , Jakub Juryšek 4 , Ronan Cunniffe 4 , Michael Prouza 4…”

Section: Exceptionally Bright Optical Emission From a Rare And Distant γ−Ray Burstmentioning

confidence: 99%

Exceptionally bright optical emission from a rare and distant gamma-ray burst

Oganesyan¹,

Karpov²,

Jelínek³

et al. 2021

Preprint

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Long gamma-ray bursts (GRBs) are produced by the dissipation of ultra-relativistic jets launched by newly-born black holes after the collapse of massive stars. Right after the luminous and highly variable gamma-ray emission, the multi-wavelength afterglow is released by the external dissipation of the jet in circumburst medium. We report the discovery of a very bright (10 mag) optical emission 28 s after the explosion of the extremely luminous and energetic GRB 210619B located at redshift 1.937. Early multi-filter observations allowed us to witness the end of the shock wave propagation into the GRB ejecta. We observed the spectral transition from a bright reverse to the forward shock emission, demonstrating that the early and late GRB multi-wavelength emission is originated from a very narrow jet propagating into an unusually rarefied interstellar medium. We also find evidence of an additional component of radiation, coming from the jet wings which is able explain the uncorrelated optical/X-ray emission.

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“…We observed the field of FRB121102 for three nights in September 2017 with a D50 telescope (Nekola et al ) of Astronomical Institute of Czech Academy of Sciences, located in Ondřejov observatory, Czech Republic. The telescope is a 500 mm f/4.5 Newtonian, equipped with standard B, V, R, I, and N (clear) filters, installed on a robotic mount and driven by RTS2 robotic observatory control software (Kubánek et al ).…”

Section: Observations and Data Reductionmentioning

confidence: 99%

Looking for fast optical bursts from FRB121102: Case study for a small telescopes with sub‐second temporal resolution

2019

Self Cite

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To assess the potential of small telescopes for high temporal resolution astrophysics, we observed the field of FRB 121102 repeating source of fast radio bursts (FRBs) on a 50-cm D50 telescope of Ondřejov observatory, equipped with a fast frame rate electron-multiplying charge coupling device (EMCCD) detector. In three nights of observations, we did not detect any optical flares from the source, which allows us to place an upper limit of 10 mJy for brightness of possible fast optical events on a time scale of 10 ms. We also characterize the apparent brightness stability of field stars on the same time scale in order to investigate the potential of such telescopes for detecting faint optical variability on a subsecond time scale.

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Robotic telescopes for high energy astrophysics in Ondřejov

Cited by 11 publications

References 3 publications

Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems

Application of Wavelet Transform for Image Denoising of Spatially and Time Variable Astronomical Imaging Systems

Exceptionally bright optical emission from a rare and distant gamma-ray burst

Looking for fast optical bursts from FRB121102: Case study for a small telescopes with sub‐second temporal resolution

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