J. Aleksić
A5080451941- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Particle Detector Development and Performance
- Genetic diversity and population structure
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Forest Insect Ecology and Management
- Forest ecology and management
- Cosmology and Gravitation Theories
- Astronomical Observations and Instrumentation
- Forest Ecology and Biodiversity Studies
- Particle physics theoretical and experimental studies
- Botany and Plant Ecology Studies
- Pulsars and Gravitational Waves Research
- Stability and Controllability of Differential Equations
- Nonlinear Partial Differential Equations
- CCD and CMOS Imaging Sensors
- Agricultural pest management studies
- Genetic and Environmental Crop Studies
- Neutrino Physics Research
- RNA Research and Splicing
- Nonlinear Differential Equations Analysis
University of Belgrade
2014-2025
Institute of Molecular Genetics and Genetic Engineering
2013-2023
Institute of Molecular Genetics
2014-2020
Clinical Centre of Kragujevac
2020
Institute for High Energy Physics
2009-2019
University of Novi Sad
2004-2019
University of Cambridge
2009-2018
Universitat Autònoma de Barcelona
2011-2016
Croatian Veterinary Institute
2003-2016
Wellcome/MRC Cambridge Stem Cell Institute
2014-2016
We present cosmological results from a combined analysis of galaxy clustering and weak gravitational lensing, using 1321 deg$^2$ $griz$ imaging data the first year Dark Energy Survey (DES Y1). combine three two-point functions: (i) cosmic shear correlation function 26 million source galaxies in four redshift bins, (ii) angular autocorrelation 650,000 luminous red five (iii) galaxy-shear cross-correlation positions shears. To demonstrate robustness these results, we use independent pairs...
Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. huge potential in astrophysics, particle physics and cosmology. CTA is an international initiative to build next generation instrument, factor 5-10 improvement sensitivity 100 GeV 10 TeV range extension energies well below above TeV. will consist two arrays (one north, one south) for full sky coverage be operated as open observatory....
This overview paper describes the legacy prospect and discovery potential of Dark Energy Survey (DES) beyond cosmological studies, illustrating it with examples from DES early data.DES is using a wide-field camera (DECam) on 4 m Blanco Telescope in Chile to image 5000 sq deg sky five filters (grizY).
Very high energy (VHE) γ-ray emission from the flat spectrum radio quasar (FSRQ) PKS 1222+21 (4C 21.35, z = 0.432) was detected with MAGIC Cherenkov telescopes during a short observation (∼0.5 hr) performed on 2010 June 17. The detection coincides high-energy MeV/GeV activity measured by Large Area Telescope (LAT) board Fermi satellite. VHE extends about 70 GeV up to at least 400 and can be well described power-law dN/dE ∝ E−Γ photon index Γ 3.75 ± 0.27stat 0.2syst. averaged integral flux...
Abstract Summary: InterMine is an open-source data warehouse system that facilitates the building of databases with complex integration requirements and a need for fast customizable query facility. Using InterMine, large biological can be created from range heterogeneous sources, extensible model allows easy new types. The analysis tools include flexible builder, genomic region search library ‘widgets’ performing various statistical analyses. results exported in many commonly used formats....
Supermassive black holes with masses of millions to billions solar are commonly found in the centers galaxies. Astronomers seek image jet formation using radio interferometry, but still suffer from insufficient angular resolution. An alternative method resolve small structures is measure time variability their emission. Here, we report on gamma-ray observations galaxy IC 310 obtained MAGIC telescopes revealing doubling scales faster than 4.8 min. Causality constrains size emission region be...
Shear peak statistics has gained a lot of attention recently as practical alternative to the two point for constraining cosmological parameters. We perform shear analysis Dark Energy Survey (DES) Science Verification (SV) data, using weak gravitational lensing measurements from 139 deg$^2$ field. measure abundance peaks identified in aperture mass maps, function their signal-to-noise ratio, range $0<\mathcal S / \mathcal N<4$. To predict counts parameters we use suite $N$-body simulations...
The Perseus galaxy cluster was observed by the MAGIC Cherenkov telescope for a total effective time of 24.4 hr during 2008 November and December. resulting upper limits on gamma-ray emission above 100 GeV are in range 4.6 to 7.5 x 10^{-12} cm^{-2} s^{-1} spectral indices from -1.5 -2.5, thereby constraining produced cosmic rays, dark matter annihilations, central radio NGC1275. Results compatible with cosmological simulations cosmic-ray-induced emission, average ray-to-thermal pressure <4%...
We present the results of stereoscopic observations satellite galaxy Segue 1 with MAGIC Telescopes, carried out between 2011 and 2013. With almost 160 hours good-quality data, this is deepest observational campaign on any dwarf performed so far in very high energy range electromagnetic spectrum. search large data sample for signals dark matter particles mass 100 GeV 20 TeV. For we use full likelihood analysis method, which provides optimal sensitivity to characteristic gamma-ray spectral...
We performed a 4.5-month multi-instrument campaign (from radio to VHE gamma rays) on Mrk421 between January 2009 and June 2009, which included VLBA, F-GAMMA, GASP-WEBT, Swift, RXTE, Fermi-LAT, MAGIC, Whipple, among other instruments collaborations. was found in its typical (non-flaring) activity state, with flux of about half that the Crab Nebula, yet light curves show significant variability at all wavelengths, highest being X-rays. determined power spectral densities (PSD) most wavelengths...
We report the results of observation nearby satellite galaxy Segue 1 performed by MAGIC-I ground-based gamma-ray telescope between November 2008 and March 2009 for a total 43.2 hours. No significant emission was found above background. Differential upper limits on flux are derived assuming various power-law slopes possible spectrum. Integral also calculated several spectra different energy thresholds. The values order 10^{-11} ph cm^{-2}$ s^{-1} 100 GeV 10^{-12} cm^{-2} 200 GeV. is currently...
We report on the detection of very-high energy (VHE, E > 100 GeV) γ-ray emission from NGC 1275, central radio galaxy Perseus cluster galaxies. The source has been detected by MAGIC telescopes with a statistical significance 6.6σ above GeV in 46 h stereo observations carried out between August 2010 and February 2011. measured differential spectrum 70 500 can be described power law steep spectral index Γ = −4.1 ± 0.7stat 0.3syst, average flux is Fγ (1.3 0.2stat 0.3syst) × 10-11 cm-2 s-1. These...
The very high energy (VHE; E > 100 GeV) blazar Markarian 501 has a well-studied history of extreme spectral variability and is an excellent laboratory for studying the physical processes within jets active galactic nuclei. However, there are few detailed multiwavelength studies during its quiescent state, due to low luminosity. A short-term study was coordinated in March 2009, focusing around multi-day observation with Suzaku X-ray satellite including {\gamma}-ray data from VERITAS, MAGIC,...
Among more than fifty blazars detected in very high energy (VHE, E>100GeV) gamma-rays, only three belong to the subclass of Flat Spectrum Radio Quasars (FSRQs). MAGIC observed FSRQ PKS 1510-089 February-April 2012 during a activity state (HE, E>100 MeV) gamma-ray band by AGILE and Fermi. observations result detection source with significance 6.0 sigma. In agreement previous VHE source, we find no statistically significant variability daily, weekly or monthly time scales. The other two...
We report on the observation of $\gamma$-rays above 25\,GeV from Crab pulsar (PSR B0532+21) using MAGIC I telescope. Two data sets observations during winter period 2007/2008 and 2008/2009 are used. In order to discuss spectral shape 100\,MeV 100\,GeV, one year public {\it Fermi} Large Area Telescope ({\it Fermi}-LAT) also analyzed complement data. The extrapolation exponential cutoff spectrum determined with Fermi-LAT is inconsistent measurements, which requires a modification standard...
Accurate statistical measurement with large imaging surveys has traditionally required throwing away a sizable fraction of the data. This is because most measurements have relied on selecting nearly complete samples, where variations in composition galaxy population seeing, depth, or other survey characteristics are small. We introduce new method that aims to minimize this wastage, allowing precision for any class stars galaxies detectable an survey. implemented our proposal Balrog, software...
We use 73 h of stereoscopic data taken with the MAGIC telescopes to investigate very high-energy (VHE) gamma-ray emission Crab pulsar. Our show a highly significant pulsed signal in energy range from 50 400 GeV both main pulse (P1) and interpulse (P2) phase regions. provide widest spectra date VHE components peaks, these extend satellite-borne observatories. The good resolution background rejection system allows us cross-check correctness each spectral point pulsar by comparison...