888 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- D. Buckley6 profiles32 · h 39
- P. Meintjes2 profiles28 · h 36
- B. van Soelen2 profiles15 · h 13
- K. K. Singh3 profiles11 · h 14
- M. Gromadzki8 · h 33
- S. Scaringi8 · h 24
- A. Odendaal7 · h 6
- J. Beirlant7 · h 39
- S. Potter2 profiles7 · h 25
- A. Udalski6 · h 72
- C. Knigge3 profiles6 · h 47
- F. Ramamonjisoa2 profiles6 · h 4
- University of WarsawPL118 papers
- Centre National de la Recherche ScientifiqueFR117 papers
- Heidelberg UniversityDE103 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR95 papers
- Nicolaus Copernicus Astronomical CenterPL94 papers
- North-West UniversityZA92 papers
- University of PotsdamDE90 papers
- Dublin Institute For Advanced StudiesIE88 papers
- University of TübingenDE88 papers
- University of LeicesterGB87 papers
- Friedrich-Alexander-Universität Erlangen-NürnbergDE86 papers
- Universität HamburgDE86 papers
21 papers · 1 filter
Polarimetric evidence of a white dwarf pulsar in the binary system AR Scorpii
D. A. H. Buckley, P. J. Meintjes, S. B. Potter +2
The variable star AR Sco was recently discovered to pulse in brightness every 1.97 min from ultraviolet wavelengths into the radio regime. The system is composed of a cool, low-mas…
Gamma-ray blazar spectra with H.E.S.S. II mono analysis: the case of PKS 2155-304 and PG 1553+113
H. E. S. S. Collaboration, :, H. Abdalla +332
The addition of a 28 m Cherenkov telescope (CT5) to the H.E.S.S. array extended the experiment's sensitivity to lower energies. The lowest energy threshold is obtained using monosc…
First limits on the very-high energy gamma-ray afterglow emission of a fast radio burst: H.E.S.S. observations of FRB 150418
H. E. S. S. Collaboration, :, H. Abdalla +265
Aims: Following the detection of the fast radio burst FRB150418 by the SUPERB project at the Parkes radio telescope, we aim to search for very-high energy gamma-ray afterglow emiss…
Deeper H.E.S.S. observations of Vela Junior (RX J0852.04622): Morphology studies and resolved spectroscopy
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +260
Aims. We study gamma-ray emission from the shell-type supernova remnant (SNR) RX J0852.04622 to better characterize its spectral properties and its distribution over the SNR. Me…
More generalized groundwater model with space-time Caputo Fabrizio fractional differentiation
J-D Djida, A. Atangana
We prove existence and uniqueness of the flow of water within a confined aquifer with fractional diffusion in space and fractional time derivative in the sense of Caputo-Fabrizio.…
Characterizing the gamma-ray long-term variability of PKS 2155-304 with H.E.S.S. and Fermi-LAT
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +244
Studying the temporal variability of BL Lac objects at the highest energies provides unique insights into the extreme physical processes occurring in relativistic jets and in the v…
Orbital and Superorbital Monitoring of the Be/X-ray binary A0538-66: constraints on the system parameters
A. F. Rajoelimanana, P. A. Charles, P. J. Meintjes +3
We combine the decade long photometry of the Be/X-ray binary system A0538-66 provided by the MACHO and OGLE IV projects with high resolution SALT spectroscopy to provide detailed c…
H.E.S.S. limits on line-like dark matter signatures in the 100 GeV to 2 TeV energy range close to the Galactic Centre
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +246
A search for dark matter line-like signals was performed in the vicinity of the Galactic Centre by the H.E.S.S. experiment on observational data taken in 2014. An unbinned likeliho…
The supernova remnant W49B as seen with H.E.S.S. and Fermi-LAT
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +253
The supernova remnant (SNR) W49B originated from a core-collapse supernova that occurred between one and four thousand years ago, and subsequently evolved into a mixed-morphology r…
H.E.S.S. observations of RX J1713.7-3946 with improved angular and spectral resolution; evidence for gamma-ray emission extending beyond the X-ray emitting shell
H. E. S. S. Collaboration, :, H. Abdalla +252
Supernova remnants exhibit shock fronts (shells) that can accelerate charged particles up to very high energies. In the past decade, measurements of a handful of shell-type superno…
Modelling Censored Losses Using Splicing: a Global Fit Strategy With Mixed Erlang and Extreme Value Distributions
Tom Reynkens, Roel Verbelen, Jan Beirlant +1
In risk analysis, a global fit that appropriately captures the body and the tail of the distribution of losses is essential. Modelling the whole range of the losses using a standar…
Search for dark matter annihilations towards the inner Galactic halo from 10 years of observations with H.E.S.S
H. E. S. S. Collaboration, :, H. Abdallah +245
The inner region of the Milky Way halo harbors a large amount of dark matter (DM). Given its proximity, it is one of the most promising targets to look for DM. We report on a searc…
A search for very high-energy flares from the microquasars GRS 1915+105, Circinus X-1, and V4641 Sgr using contemporaneous H.E.S.S. and RXTE observations
H. E. S. S. Collaboration, H. Abdalla, A. Abramowski +244
Microquasars are potential -ray emitters. Indications of transient episodes of -ray emission were recently reported in at least two systems: Cyg X-1 and Cyg X-3. The identifi…
Extended VHE gamma-ray emission towards SGR1806-20, LBV1806-20, and stellar cluster Cl*1806-20
H. Abdalla, A. Abramowski, F. Aharonian +241
Using the High Energy Spectroscopic System (H.E.S.S.) telescopes we have discovered a steady and extended very high-energy (VHE) gamma-ray source towards the luminous blue variable…
Reducing MSE in estimation of heavy tails: a Bayesian approach
Gaonyalelwe Maribe, Andréhette Verster, Jan Beirlant
Bias reduction in tail estimation has received considerable interest in extreme value analysis. Estimation methods that minimize the bias while keeping the mean squared error (MSE)…
Fitting tails affected by truncation
Jan Beirlant, Isabel Fraga Alves, Tom Reynkens
In several applications, ultimately at the largest data, truncation effects can be observed when analysing tail characteristics of statistical distributions. In some cases truncati…
Derivative with two fractional orders: New door of investigation toward revolution in fractional calculus
Abdon Atangana
In order to describe more complex problem using the concept of fractional derivatives, we introduce in this paper the concept of fractional derivatives with orders. The new definit…
Long-term study of Mkn 421 with the HAGAR Array of Telescopes
Atreyee Sinha, Amit Shukla, Lab Saha +8
Context:The HAGAR Telescope Array at Hanle, Ladakh has been regularly monitoring the nearby blazar Mkn 421 for the past 7yrs. Aims: Blazars show flux variability in all timescales…
Large Cayley digraphs and bipartite Cayley digraphs of odd diameters
Marcel Abas, Tomas Vetrik
Let be the largest number of vertices in a Cayley digraph of degree and diameter , and let be the largest order of a bipartite Cayley digraph for given…
Some Reliability Properties of Transformed-Transformer Family of Distributions
Nil Kamal Hazra, Pradip Kundu, Asok K. Nanda
The Transformed-Transformer family of distributions are the resulting family of distributions as transformed from a random variable through another transformer random variable…
Detailed spectral and morphological analysis of the shell type SNR RCW 86
H. E. S. S. Collaboration, A. Abramowski, F. Aharonian +232
Aims: We aim for an understanding of the morphological and spectral properties of the supernova remnant RCW~86 and for insights into the production mechanism leading to the RCW~86…