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Open Universe for Blazars: A new generation of astronomical products based on 14 years of Swift -XRT data
(EDP Sciences, 2019-11)
Aims. Open Universe for Blazars is a set of high-transparency multi-frequency data products for blazar science, and the tools designed to generate them. Blazars are drawing growing interest following the consolidation of ...
Open Universe survey of Swift -XRT GRB fields: Flux-limited sample of HBL blazars
(EDP Sciences, 2020-10)
Aims. The sample of serendipitous sources detected in all Swift-XRT images pointing at gamma ray bursts (GRBs) constitutes the largest existing medium-deep survey of the X-ray sky. To build such dataset we analysed all ...
The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?
(OXFORD UNIV PRESS, 2015)
We present a wide data set of gamma-ray, X-ray, UV/Opt/IR (UVOIR), and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and ...
Multiwavelength Observations of the AGN 1ES 0414+009 with VERITAS, Fermi-LAT, Swift-XRT, and MDM
(IOP Publishing, 2012-08)
We present observations of the BL Lac object 1ES 0414+009 in the E > 200 GeV gamma-ray band by the VERITAS array of Cherenkov telescopes. 1ES 0414+009 was observed by VERITAS between 2008 January and 2011 February, resulting ...
Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis
(EDP Sciences, 2018-11)
A sudden increase in the rate at which material reaches the most internal part of an accretion disk, i.e., the boundary layer, can change its structure dramatically. We have witnessed such a change for the first time in ...
Accurate classification of 29 objects detected in the 39 month Palermo Swift/BAT hard X-ray catalogue ⋆, ⋆ ⋆
(Astronomy & Astrophysics, 2012)
Characterization of extragalactic fast X-ray transients from X-ray archival searches
(2023)
Extragalactic fast X-ray transients (FXTs) are non-Galactic short flashes of X-ray photons (in the narrow range of ≈0.3–10 keV) of unclear origin that last a few minutes to hours. A variety of astronomical objects and ...
The gamma-ray sky seen at X-ray energies. I. Searching for the connection between X-ray and gamma-rays in Fermi BL Lac objects
(EDP Sciences, 2019-10)
Context. BL Lac objects are an extreme type of active galactic nuclei (AGNs) that belong to the largest population of γ-ray sources: blazars. This class of AGNs shows a double-bumped spectral energy distribution that is ...
Discovery of TeV γ-ray emission from PKS 0447-439 and derivation of an upper limit on its redshift
(Edp Sciences S A, 2013-04)
Very high-energy γ-ray emission from PKS 0447−439 was detected with the H.E.S.S. Cherenkov telescope array in December 2009. This blazar is one of the brightest extragalactic objects in the Fermi bright source list and has ...