C. C. Thöne
A5078667245- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Galaxies: Formation, Evolution, Phenomena
- SAS software applications and methods
- Astrophysics and Star Formation Studies
- Adaptive optics and wavefront sensing
- Solar and Space Plasma Dynamics
- Methane Hydrates and Related Phenomena
- Geomagnetism and Paleomagnetism Studies
- CCD and CMOS Imaging Sensors
- Planetary Science and Exploration
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Advanced X-ray and CT Imaging
- Spectroscopy Techniques in Biomedical and Chemical Research
- Statistical Mechanics and Entropy
- Radioactive Decay and Measurement Techniques
Czech Academy of Sciences, Astronomical Institute
2020-2025
Instituto de Astrofísica de Andalucía
2014-2023
University of Copenhagen
2005-2014
Consejo Superior de Investigaciones Científicas
2011-2014
Trinity House
2014
Unidades Centrales Científico-Técnicas
2014
Brera Astronomical Observatory
2009-2013
Yunnan Observatories
2010-2011
Chinese Academy of Sciences
2010-2011
National Institute for Astrophysics
2009-2010
Abstract We report the discovery and monitoring of near-infrared counterpart (AT2017gfo) a binary neutron-star merger event detected as gravitational wave source by Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo (GW170817) short gamma-ray burst Fermi Gamma-ray Burst Monitor (GBM) Integral SPI-ACS (GRB 170817A). The evolution transient light is consistent with predictions for behavior “kilonova/macronova” powered radioactive decay massive neutron-rich nuclides...
Variable X-ray and gamma-ray emission is characteristic of the most extreme physical processes in Universe, studying sources these energetic photons has been a major driver astronomy for past 50 years. Here we present multiwavelength observations unique selected transient, discovered by Swift, which was accompanied bright across electromagnetic spectrum, whose properties are unlike any previously observed source. We pinpoint event to center small, star-forming galaxy at redshift z=0.3534....
We describe the construction of GROND, a 7-channel imager, primarily designed for rapid observations gamma-ray burst afterglows. It allows simultaneous imaging in Sloan g' r' i' z' and near-infrared JHK bands. GROND was commissioned at MPI/ESO 2.2 m telescope La Silla (Chile) April 2007, first results its performance calibration are presented.
(Abridged). We present a sample of 77 optical afterglows (OAs) Swift detected GRBs for which spectroscopic follow-up observations have been secured. provide linelists and equivalent widths all lines redward Ly-alpha. discuss to what extent the current bursts with OA spectroscopy is biased subsample GRBs. For that purpose we define an X-ray selected optimal conditions ground-based follow up from period March 2005 September 2008; 146 fulfill our criteria. derive redshift distribution this...
We present comprehensive multiwavelength observations of three gamma-ray bursts (GRBs) with durations several thousand seconds. demonstrate that these events are extragalactic transients; in particular we resolve the long-standing conundrum distance GRB 101225A (the "Christmas-day burst"), finding it to have a redshift z=0.847, and showing two apparently similar (GRB 111209A 121027A) lie at z=0.677 z=1.773 respectively. The systems show extremely unusual X-ray optical lightcurves, very...
Superluminous supernovae (SLSNe) are very bright explosions that were only discovered recently and show a preference for occurring in faint dwarf galaxies. Understanding why stellar evolution yields different types of these environments is fundamental order to both uncover the elusive progenitors SLSNe study star formation In this paper, we present first results our project SUperluminous Supernova Host galaxIES, focusing on sample which have obtained spectroscopy. We SLSNe-I SLSNe-R...
The mergers of binary compact objects such as neutron stars and black holes are central interest to several areas astrophysics, including the progenitors gamma-ray bursts (GRBs), sources high-frequency gravitational waves likely production sites for heavy element nucleosynthesis via rapid capture (the r-process). These elements include some great geophysical, biological cultural importance, thorium, iodine gold. Here we present observations exceptionally bright burst GRB 230307A. We show...
We present high-precision photometry of two transit events the extrasolar planetary system WASP-5, obtained with Danish 1.54m telescope at ESO La Silla. In order to minimise both random and flat-fielding errors, we defocussed so its point spread function approximated an annulus diameter 40 pixels (16 arcsec). Data reduction was undertaken using standard aperture plus algorithm for optimally combining ensemble comparison stars. The resulting light curves have point-to-point scatters 0.50 mmag...
Aims.We present early optical spectroscopy of the afterglow gamma-ray burst GRB 060206 with aim determining metallicity absorber and physical conditions in circumburst medium. We also discuss how GRBs may be important complementary probes cosmic chemical evolution.
We report the Swift discovery of nearby long, soft gamma-ray burst GRB 100316D, and subsequent unveiling its low redshift host galaxy associated supernova. derive event to be z = 0.0591 +/- 0.0001 provide accurate astrometry for GRB-SN. study extremely unusual prompt emission with time-resolved X-ray spectroscopy, find that spectrum is best modelled a thermal component in addition synchrotron peak energy. The light curve has remarkably shallow decay out at least 800 s. bright, blue highly...
The SUperluminous Supernova Host galaxIES (SUSHIES) survey aims to provide strong new constraints on the progenitors of superluminous supernovae (SLSNe) by understanding relationship their host galaxies. We present photometric properties 53 H-poor and 16 H-rich SLSN galaxies out $z\sim4$. model spectral energy distributions derive physical properties, which we compare with other galaxy populations. At low redshift, SLSNe are preferentially found in very blue, low-mass high average specific...
Abstract We present Hubble Space Telescope ( HST ) and Chandra imaging, combined with Very Large MUSE integral field spectroscopy of the counterpart host galaxy first binary neutron star merger detected via gravitational-wave emission by LIGO Virgo, GW170817. The galaxy, NGC 4993, is an S0 at z = 0.009783. There evidence for large, face-on spiral shells in continuum edge-on features visible nebular lines. This suggests that 4993 has undergone a relatively recent <mml:math...
Abstract We report our identification of the optical afterglow and host galaxy short-duration gamma-ray burst sGRB 160821B. The spectroscopic redshift is z = 0.162, making it one lowest bursts (sGRBs) identified by Swift . Our intensive follow-up campaign using a range ground-based facilities as well Hubble Space Telescope , XMM-Newton shows evidence for late-time excess near-infrared emission in addition to complex afterglow. light curve at X-ray frequencies reveals narrow jet, <?CDATA...
ABSTRACT We introduce the Swift Gamma-Ray Burst Host Galaxy Legacy Survey (“SHOALS”), a multi-observatory high-redshift galaxy survey targeting largest unbiased sample of long-duration gamma-ray burst (GRB) hosts yet assembled (119 in total). describe motivations and development our selection criteria, including an assessment impact various observability metrics on success rate afterglow-based redshift measurement. briefly outline host observational program, consisting deep Spitzer /IRAC...
ABSTRACT GRANDMA (Global Rapid Advanced Network Devoted to the Multi-messenger Addicts) is a network of 25 telescopes different sizes, including both photometric and spectroscopic facilities. The aims coordinate follow-up observations gravitational-wave (GW) candidate alerts, especially those with large localization uncertainties, reduce delay between initial detection optical confirmation. In this paper, we detail GRANDMA’s observational performance during LIGO/Advanced Virgo Observing Run...
Abstract We present James Webb Space Telescope (JWST) and Hubble (HST) observations of the afterglow GRB 221009A, brightest gamma-ray burst (GRB) ever observed. This includes first mid-IR spectra any GRB, obtained with JWST/Near Infrared Spectrograph (0.6–5.5 micron) Mid-Infrared Instrument (5–12 micron), 12 days after burst. Assuming that intrinsic spectral slope is a single power law, F ν ∝ − β , we obtain ≈ 0.35, modified by substantial dust extinction A V = 4.9. suggests above notional...
Abstract This is the first in a collection of three papers introducing science with an ultra-violet (UV) space telescope on approximately 130 kg small satellite moderately fast re-pointing capability and real-time alert communication system approved for Czech national mission. The mission, called Quick Ultra-Violet Kilonova surveyor—QUVIK , will provide key follow-up capabilities to increase discovery potential gravitational wave observatories future wide-field multi-wavelength surveys....
Context.Before the launch of Swift satellite, majority gamma-ray burst (GRB) afterglows for which Lyα was redshifted into observable spectrum showed evidence a damped absorber. This small sample indicated that GRBs explode either in galaxies, or regions within them, having high neutral hydrogen column densities.