The inner region of the MilkyÂ 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 search for theâ€¦ (More)

A. Abramowski, F. Acero, F. Aharonian, 4, 5 F. Ait Benkhali, A.G. Akhperjanian, 5 E. AngÃ¼ner, G. Anton, S. Balenderan, A. Balzer, 11 A. Barnacka, Y. Becherini, 14, 15 J. Becker Tjus, K. BernlÃ¶hr, 7â€¦ (More)

We establish the existence of one or more than one positive periodic solutions of singular systems of first order difference equations âˆ†x(k) =âˆ’a(k)x(k)+Î»b(k)f(x(k)). The proof of our results is basedâ€¦ (More)

We study the discrete approximation to solutions of first-order system arising from applying the trapezoidal rule to a second-order scalar ordinary differential equation. In the trapezoidal rule theâ€¦ (More)

This paper is concerned with the existence of one or more positive solutions for a second order discrete system yi(k âˆ’ 1) + Î»ai(k)fi(y1(k), y2(k), Â· Â· Â· , yn(k)) + Î»ei(k) = 0, k âˆˆ N1,T , i = 1, 2, Â·â€¦ (More)

H. E. S. S. Collaboration, Attila Abramowski, +205 authorsH.-S. Zechlin

2013

Aims. We present very high energy (VHE; E > 100 GeV) data from the Î³-ray binary system PSR B1259-63/LS 2883 taken around its periastron passage on 15th of December 2010 with the High Energyâ€¦ (More)

Composite supernova remnants (SNRs) constitute a small subclass of the remnants of massive stellar explosions where non-thermal radiation is observed from both the expanding shell-like shock frontâ€¦ (More)

Abstract We study difference equations which arise as discrete approximations to three-point boundary value problems for systems of first-order ordinary differential equations. We obtain new resultsâ€¦ (More)