Using the IBIS Compton mode, the INTEGRAL satellite is able to detect and localize bright and hard GRBs, which happen outside of the nominal INTEGRAL field of view. We have developed a method of analyzing such INTEGRAL data to obtain the burst location and spectra. We present the results for the case of GRB 030406. The burst is localized with the Compton events, and the location is consistent w...

This paper proposes an optical burst switched network architecture with distributed fairness control. Burst dropping at intermediate nodes is the weakness of the Optical Burst Switched network (OBS-n). To rectify this, the proposed architecture combines three technologies: ring structure, upstream prioritized switching (UPS), and distributed fairness control. By performing UPS on the ring, burs...

The Gamma-ray instruments on-board INTEGRAL offer an unique opportunity to perform time resolved analysis on GRBs. The imager IBIS allows accurate positioning of GRBs and broad band spectral analysis, while SPI provides high resolution spectroscopy. GRB 030501 was discovered by the INTEGRAL Burst Alert System in the ISGRI field of view. Although the burst was fairly weak (fluence F20−200 keV ≃ ...

We address the issue of how to provide basic Quality of Service (QoS) in optical burst-switched WDM networks with limited fiber delay lines (FDLs). Unlike existing buffer-based QoS schemes, the novel offsettime-based QoS scheme we study in this paper does not mandate any buffer for traffic isolation, but nevertheless can take advantage of FDLs to improve QoS. This makes the proposed QoS scheme ...

ABSTRACT We present a search for radio afterglows from long gamma-ray bursts using the Australian Square Kilometre Array Pathfinder (ASKAP). Our used Rapid ASKAP Continuum Survey, covering entire celestial sphere south of declination +41○, and three epochs Variables Slow Transients Pilot Survey (Phase 1), ∼5000 square degrees per epoch. The observations we these surveys spanned nine-month perio...

In September 2021 the magnetar SGR J1935+2154 entered a stage of burst/flaring activity in hard X-ray band. On 10, we observed with fiber-fed fast optical photon counter IFI+Iqueye, mounted at 1.22 m Galileo telescope Asiago. During one IFI+Iqueye observing windows burst was detected Fermi Gamma-ray Burst Monitor. We performed search for any significant increase count rate on 1-s, 10-ms and 1-m...

The prompt emission of most gamma-ray bursts (GRBs) typically exhibits a non-thermal Band component. synchrotron radiation in the popular internal shock model is generally put forward to explain such However, low-energy photon index α∼−1.5 predicted by inconsistent with observed value α∼−1. Here, we investigate evolution magnetic field during propagation shocks within an ultrarelativistic outfl...

Abstract A double-peak X-ray burst from the Galactic magnetar SGR J1935+2154 was discovered to be associated with two radio pulses of FRB 200428 separated by 28.97 ± 0.02 ms. Precise measurements timing and spectral properties bursts are helpful for understanding physical origin fast bursts. In this paper, we have reconstructed some information about hard events, which were lost because High En...