A5063676926- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Galaxies: Formation, Evolution, Phenomena
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- CCD and CMOS Imaging Sensors
- Atmospheric Ozone and Climate
- Advanced X-ray Imaging Techniques
- Photocathodes and Microchannel Plates
- Radio Astronomy Observations and Technology
- History and Developments in Astronomy
- Spectroscopy and Laser Applications
- Superconducting Materials and Applications
- Solar Radiation and Photovoltaics
University of Leicester
2015-2024
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2024
CEA Paris-Saclay - Etablissement de Saclay
2024
CEA Paris-Saclay
2024
University of Vienna
2024
University College London
2024
Instituto Nacional de Técnica Aeroespacial
2024
Centrum Badań Kosmicznych
2016-2023
Queensland University of Technology
2023
University of Michigan
2022
Aims. Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes creation and characteristics 2XMM catalogue.
During its close approach to Earth, comet C/Hyakutake 1996 B2 was observed at extreme ultraviolet and x-ray wavelengths with the Röntgen X-ray Satellite Rossi Timing Explorer. The emission morphology symmetric respect a vector from comet's nucleus toward sun, but not around direction of motion interplanetary dust. A slowly varying large impulsive event that varied on time scales 1 2 hours were observed. An interaction between solar wind/solar magnetic field seems be most likely mechanism for...
Thanks to the large collecting area (3 x ~1500 cm$^2$ at 1.5 keV) and wide field of view (30' across in full mode) X-ray cameras on board European Space Agency observatory XMM-Newton, each individual pointing can result detection hundreds sources, most which are newly discovered. Recently, many improvements XMM-Newton data reduction algorithms have been made. These include enhanced source characterisation reduced spurious detections, refined astrometric precision, greater net sensitivity...
Abstract We present the ultraviolet luminosity function and an estimate of cosmic star formation rate density at 8 < z 13 derived from deep NIRCam observations taken in parallel with MIRI Deep Survey Hubble Ultra Field (HUDF), covering field 2. Our (40 hr) reach F277W magnitude 30.8 (5 σ ), more than 2 mag deeper JWST public data sets already analyzed to find high-redshift galaxies. select a sample 44 > galaxy candidates based on their dropout nature F115W and/or F150W filters, high...
The first all-sky survey for cosmic sources of extreme-ultraviolet radiation has been carried out with the UK Wide Field Camera on ROSAT. A reduction data yielded a catalogue 383 relatively bright EUV sources, forming WFC Bright Source Catalogue. This represents 30-fold increase in number astrophysical objects detected ~ 60–200 eV energy band and covers flux range, each two bands, more than 2000. search (typically 1-arcmin) error circles using variety catalogues SIMBAD base, identified...
view Abstract Citations (215) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-rays from Eta Carinae and the surrounding nebula. Seward, F. D. ; Forman, W. R. Giacconi, Griffiths, E. Harnden, R., Jr. Jones, C. Pye, J. P. Two X-ray pictures have been obtained of Car nebula using imaging detectors Einstein Observatory. One covers a field 1-deg square with resolution 1 arcmin; second 25 arcmin in diameter few arcsec. These show region diffuse...
The Mid-InfraRed Instrument (MIRI) on the James Webb Space Telescope (JWST) provides measurements over wavelength range 5 to 28.5 μm. MIRI has, within a single "package," four key scientific functions: photometric imaging, coronagraphy, single-source low-spectral resolving power (R ∼ 100) spectroscopy, and medium-resolving 1500 3500) integral field spectroscopy. An associated cooler system maintains at its operating temperature of < 6.7 K. This paper describes driving principles behind...
view Abstract Citations (231) References (14) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS A high-sensitivity X-ray survey using the Einstein Observatory and discrete source contribution to extragalactic background. Giacconi, R. ; Bechtold, J. Branduardi, G. Forman, W. Henry, P. Jones, C. Kellogg, E. van der Laan, H. Liller, Marshall, Murray, S. Pye, Schreier, Sargent, L. Seward, F. Tananbaum, Surveys of two fields have been carried out utilizing imaging...
Abstract We make use of JWST medium-band and broadband NIRCam imaging, along with ultradeep MIRI 5.6 μ m in the Hubble eXtreme Deep Field to identify prominent line emitters at z ≃ 7–8. Out a total 58 galaxies 7–8, we find 18 robust candidates (≃31%) for (H β + [O iii ]) emitters, based on their enhanced fluxes F430M F444W filters, EW 0 +[O ≃87–2100 Å. Among these 16 lie coverage area 12 exhibit clear flux excess m, indicating simultaneous presence H α emission ) ≃200–3000 This is first time...
Using MIRI on-board JWST we present mid-infrared sub-arcsec imaging (MIRIM) and spectroscopy (MRS) of the hyperluminous infrared system SPT0311-58 at z=6.9. observations are compared with existing ALMA far-infrared continuum [CII]158$\mu$m imaging. Even though suggests very high star formation rates (SFR) in eastern (E) western (W) galaxies system, H$\alpha$ line is not detected. This, together detection Pa$\alpha$ line, implies optical nebular extinction lower limits 4.2 3.9 mag (W), even...
We present MIRI/JWST medium-resolution spectroscopy (MRS) and imaging (MIRIM) of the lensed galaxy MACS1149-JD1 at a redshift z = 9.1092 ± 0.0002, when Universe was about 530 Myr old. detect, for first time, spatially resolved H α emission in above nine. The structure emitting gas consists two clumps, S N, carrying 60% 40% total flux, respectively. luminosity implies an instantaneous star-formation rate range 3.2 0.3 5.3 0.4 M ⊙ yr −1 sub-solar solar metallicities. ionizing photon production...
Context . The MIRI instrument on board JWST is now offering high-contrast imaging capacity at mid-IR wavelengths, thereby opening a completely new field of investigation for characterizing young exoplanetary systems. Aims multiplanet system HR 8799 the first target observed with MIRI’s coronagraph as part MIRI-EC Guaranteed Time Observations (GTO) exoplanet program, launched in November 2022. We obtained deep observations three coronagraphic filters, from ∼10 to 15 µm (F1065C, F1140C,...
Abstract By using an ultradeep JWST/MIRI image at 5.6 μ m in the Hubble eXtreme Deep Field, we constrain role of strong H α emitters (HAEs) during “cosmic reionization” z ≃ 7–8. Our sample HAEs is comprised young (<35 Myr) galaxies, except for one single galaxy (≈300 Myr), with low stellar masses (≲10 9 M ⊙ ). These show a wide range rest-frame UV continuum slopes ( β ), median value = −2.15 ± 0.21, which broadly correlates mass. We estimate ionizing photon production efficiency ξ ion,0 )...
Abstract We present deep James Webb Space Telescope (JWST)/Mid-Infrared Instrument (MIRI) F560W observations of a flux-limited, Atacama Large Millimeter/submillimeter Array (ALMA)-selected sample 28 galaxies at z = 0.5–3.7 in the Hubble Ultra Deep Field (HUDF). The data from MIRI Imaging Survey (MIDIS) reveal stellar structure HUDF rest-frame wavelengths λ > 1 μ m for first time. revise mass estimates using new JWST photometry and find good agreement with pre-JWST analyses; few...
The 2A catalogue is the result of 10 000 orbits observation by Leicester University Sky Survey Instrument on Ariel V satellite and it contains 105 X-ray sources with |b| > 10°. procedures criteria used in establishing these measuring their intensities positions are described. As a consequence comparatively small error boxes (0.1 to 0.5 square degree) sensitivity limit survey (90 per cent sky better than 1.2 count/s ≈ 3.2 Uhuru count/s), new optical identifications suggested.
Dusty star-forming galaxies emit most of their light at far-infrared to millimeter wavelengths as star formation is highly obscured. Far-infrared and observations have revealed dust, neutral molecular gas properties. The sensitivity JWST rest-frame optical near-infrared now allows the study stellar ionized content. We investigate spatially resolved distribution kinematics in GN20, a dusty galaxy z = 4.0548. present deep MIRI/MRS integral field spectroscopy emission GN20. detect Pa α , out...
Abstract We study the stellar population properties of 182 spectroscopically confirmed (MUSE/VLT) Ly α emitters (LAEs) and 450 photometrically selected Lyman-break galaxies (LBGs) at z = 2.8–6.7 in Hubble Extreme Deep Field. Leveraging combined power Space Telescope JWST NIRCam MIRI observations, we analyze their rest-frame UV-through-near-IR spectral energy distributions, with playing a crucial role robustly assessing LAEs’ masses ages. Our LAEs are low-mass objects <mml:math...
This paper describes the performance of XMM-Newton for serendipitous surveys and summarises scope potential Serendipitous Survey. The role Survey Science Centre (SSC) in project is outlined. SSC's follow-up identification programme survey described together with presentation some first results.
We report results of deep X-ray observations AB Doradus obtained with the XMM-Newton observatory during its Performance Verification phase. The main objective analysis is a study spectral variability coronal plasma in very active star, including investigations variable thermal structure, abundance variations, and possible density changes flares. Dor revealed both quiescent flaring emission. RGS spectra show flux lines highly ionized Fe flares, an increase continuum. Elemental abundances...