Articles by Michał Siwak

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Michał Siwak

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Gaia20bdk -- a new FUor in Sh 2-301 Star Forming Region

10 December 2024 by Michał Siwak and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

PENELLOPE\,VI. -- Searching the PENELLOPE/UVES sample with spectro-astrometry: Two new microjets of Sz 103 and XX Cha

18 May 2024 by Tilo Sperling and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Brightness and mass accretion rate evolution during the 2022 burst of EX~Lupi

5 August 2023 by F. Cruz-Sáenz De Miera and others

Solar and Stellar Astrophysics

Gaia21bty: An EXor lightcurve exhibiting an FUor spectrum

17 July 2023 by Michał Siwak and others

Solar and Stellar Astrophysics, Earth and Planetary Astrophysics

The Gaia alerted fading of the FUor-type star Gaia21elv

4 July 2023 by Zsófia Nagy and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

PENELLOPE IV. A comparison between optical forbidden lines and \rm H_2 UV lines in the Orion OB1b and σ-Ori associations

30 May 2023 by Manuele Gangi and others

Solar and Stellar Astrophysics, Earth and Planetary Astrophysics

Photometric and spectroscopic study of the EXor-like eruptive young star Gaia19fct

3 November 2022 by Sunkyung Park and others

Solar and Stellar Astrophysics

Optical variability of eight FRII-type quasars with 13-yr photometric light curves

8 October 2022 by Agnieszka Kuźmicz and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

Photometric and spectroscopic study of the burst-like brightening of two Gaia-alerted young stellar objects

5 July 2022 by Zsófia Nagy and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

A multi-epoch, multi-wavelength study of the classical FUor V1515 Cyg approaching quiescence

24 June 2022 by Zs. Szabó and others

Solar and Stellar Astrophysics

Host galaxy magnitude of OJ 287 from its colours at minimum light

31 May 2022 by Mauri Valtonen and others

Astrophysics of Galaxies, High Energy Astrophysical Phenomena

The disk of FU Orionis viewed with MATISSE/VLTI: first interferometric observations in L and M bands

20 May 2022 by F. Lykou and others

Solar and Stellar Astrophysics, Astrophysics of Galaxies

Recurrent strong outbursts of an EXor-like young eruptive star Gaia20eae

8 December 2021 by Fernando Cruz-Sáenz De Miera and others

Solar and Stellar Astrophysics

V899 Mon: a peculiar eruptive young star close to the end of its outburst

23 September 2021 by Sunkyung Park and others

Solar and Stellar Astrophysics

PENELLOPE II. CVSO 104: a pre-main sequence close binary with an optical companion in Ori OB1

13 September 2021 by Antonio Frasca and others

Solar and Stellar Astrophysics

A study of the photometric and spectroscopic variations of the prototypical FU Orionis-type star V1057 Cyg

21 May 2021 by Zs. Szabó and others

Solar and Stellar Astrophysics

PENELLOPE: the ESO data legacy program to complement the Hubble UV Legacy Library of Young Stars (ULLYSES) I. Survey presentation and accretion properties of Orion OB1 and σ-Orionis

6 April 2021 by Carlo Felice Manara and others

Solar and Stellar Astrophysics, Earth and Planetary Astrophysics

Physical parameters of close binary systems: VIII

26 January 2021 by Kosmas Gazeas and others

Solar and Stellar Astrophysics

Mount Suhora high cadence photometric survey of T Tauri-type stars

31 October 2020 by Michał Siwak and others

Solar and Stellar Astrophysics

Disc light variability in the FUor star V646 Puppis as observed by TESS and from the ground

31 October 2020 by Michał Siwak and others

Solar and Stellar Astrophysics

The quest for planets around subdwarfs and white dwarfs from Kepler space telescope fields: Part I. Techniques and tests of the methods

6 September 2020 by Jerzy Krzesiński and others

Solar and Stellar Astrophysics, Earth and Planetary Astrophysics

International observational campaign of the 2014 eclipse of EE Cep

16 January 2020 by D. Pieńkowski and others

Solar and Stellar Astrophysics

Signatures of the disk-jet coupling in the Broad-line Radio Quasar 4C+74.26

2 September 2018 by Gopal Bhatta and others

High Energy Astrophysical Phenomena

Stochastic modeling of multiwavelength variability of the classical BL Lac object OJ 287 on timescales ranging from decades to hours

10 July 2018 by Aanchal Goyal and others

High Energy Astrophysical Phenomena

Photometric variability of TW~Hya from seconds to years as seen from space and the ground in 2013-2017

11 May 2018 by Michał Siwak and others

Solar and Stellar Astrophysics

UVSat: a concept of an ultraviolet/optical photometric satellite

28 November 2017 by Andrzej Pigulski and others

Instrumentation and Methods for Astrophysics, Solar and Stellar Astrophysics

Photometric survey, modelling, and scaling of long-period and low-amplitude asteroids

6 November 2017 by Anna Marciniak and others

Earth and Planetary Astrophysics

Radio and optical intra-day variability observations of five blazars

29 April 2017 by Xueping Liu and others

Astrophysics of Galaxies

Detection of Possible Quasi-periodic Oscillations in the Long-term Optical Light Curve of the BL Lac Object OJ 287

8 September 2016 by Gopal Bhatta and others

High Energy Astrophysical Phenomena

Primary black hole spin in OJ287 as determined by the General Relativity centenary flare

14 March 2016 by M. Valtonen and others

High Energy Astrophysical Phenomena

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Solar and Stellar Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics