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Article
New blazar candidates from the 9Y-MST catalogue detected at energies higher than 10 GeV
We present a list of 24 new blazar candidates selected in a search for possible counterparts of spatial clusters of ...
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Article
Minimum Spanning Tree cluster analysis of the LMC region above 10 GeV: detection of the SNRs N 49B and N 63A
We present the results of a cluster search in the γ ...
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Article
Application of the MST clustering to the high energy \(\gamma \) -ray sky. IV—Blazar candidates found as possible counterparts of photon clusters
We present the results of a cluster search in the Fermi-LAT Pass 8 γ ...
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Article
Application of the MST clustering to the high energy \(\gamma\) -ray sky. III—New detections of \(\gamma\) -ray emission from blazars
We present the results of a photon cluster search in the γ ...
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Article
Application of the MST clustering to the high energy \(\gamma\) -ray sky. II—Possible detection of \(\gamma\) -ray emission from blazar candidates in the 1WHSP sample
We present the results of a photon cluster search in the 7-years Fermi-Large Area Telescope extragalactic Pass 8
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Article
Application of the MST clustering to the high energy \(\gamma\) -ray sky. I—New possible detection of high-energy \(\gamma\) -ray emission associated with BL Lac objects
In this paper we show an application of the Minimum Spanning Tree (MST) clustering method to the high-energy ...
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Article
The 5th edition of the Roma-BZCAT. A short presentation
The 5th edition of the Roma-BZCAT Multifrequency Catalogue of Blazars is available in a printed version and online at the ASDC website (http://www.asdc.asi.it/bzcat
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Article
Non-linear oscillator models for the X-ray bursting of the microquasar GRS 1915+105
The microquasar GRS 1915+105, exhibits a large variety of characteristic states, according to its luminosity, spectral state, and variability. The most interesting one is the so-called ρ-state, whose light curve ...
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Article
Minimal spanning tree algorithm for γ-ray source detection in sparse photon images: cluster parameters and selection strategies
The minimal spanning tree (MST) algorithm is a graph-theoretical cluster-finding method. We previously applied it to γ-ray bidimensional images, showing that it is quite sensitive in finding faint sources. Possib...
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Chapter and Conference Paper
Bepposax Observations of GRS 1915+105
The galactic superluminal source GRS 1915+105 was observed by BeppoSAX at several occasions from October 1996 to April 2000. In April 1999 the 2–10 keV light curve showed a long series of quasi regular pulses ...
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Article
BeppoSAX observations of GRS 1915+105
The galactic superluminal source GRS 1915+105 was observed byBeppoSAX at several occasions from October 1996 to April 2000. In April 1999 the 2–10 keV light curve showed a long series of quasi regular pulses w...
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Chapter and Conference Paper
Microvariability of S5 0716+714, a γ-Ray Blazar
Like many radio-selected blazars, 0716+714 shows a high level of variability on different time scales, as short as a few days (e.g. Wagner et al 1996, Ghisellini et al. 1997). The mechanism of the emission in ...
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Chapter and Conference Paper
Optical Monitoring of the Gamma-Ray Loud BL Lac Object S5 0716+714
We monitored the γ-ray loud BL Lac object S5 0716+714 between November 1994 and April 1995 (J.D. 2449671–2449838), from the Observatories of Torino, Perugia and Roma. The source was always active in the R and B b...
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Chapter and Conference Paper
Imaging Performance of FIGARO-IV, A Large Area γ-Ray Telescope Above 100 MeV.
We are develo** a new telescope, named FIGARO-IV, for γ-ray astronomy above 100 MeV, in which the electron-positron pairs, produced by photons in lead converters, are tracked in several independent planes of...
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Article
Towards a new maximum of OJ 287?
The results of a photometric campaign in theB, V, R andI bands of the BL Lac object OJ 287 are presented. The source is found at the same level and spectral slope as in 1991, without any sign forecasting the pred...
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Chapter
A Very Large Area Telescope for γ-Ray Astronomy Above 100 MeV Employing Limited Streamer Tubes
A new detector for γ-ray astronomy above 100 MeV is described in which the electron-positron pairs are tracked by means of a set of plane arrays of Limited Streamer Tubes. This technique allows to build up ver...
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Article
Status of the development of the imaging proportional counters for the Stellar X-Ray Polarimeter
The Stellar X-Ray Polarimeter SXRP will be flown at the focus of the SODART X-ray telescope aboard the Russian satellite SPECTRUM-X-Gamma by the end of 1995. Four imaging proportional counters will detect phot...
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Article
FIGARO IV: Large-area balloon-borne telescope to study rapid time variabilities in the gamma-ray sources at energies above 50 MeV
We present a new γ-ray telescope based on the Limited Streamer Tube technology, used as tracking chambers to detect photons above 100 MeV. This technique allows to obtain very large sensitive areas (16 m2 in our ...
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Article
SXRP: an X-ray polarimeter for the SPECTRUM-X-Gamma Mission
TheStellar X-ray Polarimeter (SXRP) is a focal plane instrument which will be flown on the SPECTRUM-X-Gamma mission in 1993. The polarimeter is composed of two separate instruments: the first exploits the depende...
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Article
The SUGAR experiment, technical description and performances
An experiment to verify the performances of BGO/CsI phoswich detectors, in the domain of gamma-ray astronomy, was converted into a small-size experiment to detect X-gamma emission from the SN1987A. We shortly ...
