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We present here our results of the temporal and spectral analysis of a sample of 52 bright and hard gamma-ray bursts (GRBs) observed with the Fermi Gamma-ray Burst Monitor (GBM) during its first year of operation (July 2008-July 2009). Our…

Since late 2007, we have been monitoring a large sample of known and likely gamma-ray-loud blazars at 15 GHz twice per week with the Owens Valley Radio Observatory (OVRO) 40 m Telescope. Our initial sample included the 1158 sources above…

The fourth Fermi Large Area Telescope (LAT) catalog (4FGL) contains 5064 $\gamma$-ray sources detected at high significance, but 26% of them still lack associations at other wavelengths. The SPT-SZ survey, conducted between 2008 and 2011…

The NaI and BGO detectors on the Gamma-ray Burst Monitor (GBM) on Fermi are now being used for long-term monitoring of the hard X-ray/low energy gamma-ray sky. Using the Earth occultation technique as demonstrated previously by the BATSE…

The dramatic increase in the number of known gamma-ray pulsars since the launch of the Fermi Gamma-ray Space Telescope (formerly GLAST) offers the first opportunity to study a population of these high-energy objects. This catalog summarizes…

高能天体物理现象 · 物理学 2019-08-13 A. A. Abdo

The blazar AO 0235+164 (z = 0.94) has been one of the most active objects observed by Fermi Large Area Telescope (LAT) since its launch in Summer 2008. In addition to the continuous coverage by Fermi, contemporaneous observations were…

高能天体物理现象 · 物理学 2012-07-13 M. Ackermann , M. Ajello , J. Ballet , G. Barbiellini , D. Bastieri , R. Bellazzini , R. D. Blandford , E. D. Bloom , E. Bonamente , A. W. Borgland , E. Bottacini , J. Bregeon , M. Brigida , P. Bruel , R. Buehler , S. Buson , G. A. Caliandro , R. A. Cameron , P. A. Caraveo , J. M. Casandjian , E. Cavazzuti , C. Cecchi , E. Charles , A. Chekhtman , J. Chiang , S. Ciprini , R. Claus , J. Cohen-Tanugi , S. Cutini , F. D'Ammando , F. de Palma , C. D. Dermer , E. do Couto e Silva , P. S. Drell , A. Drlica-Wagner , R. Dubois , C. Favuzzi , S. J. Fegan , E. C. Ferrara , W. B. Focke , P. Fortin , L. Fuhrmann , Y. Fukazawa , P. Fusco , F. Gargano , D. Gasparrini , N. Gehrels , S. Germani , N. Giglietto , P. Giommi , F. Giordano , M. Giroletti , T. Glanzman , G. Godfrey , I. A. Grenier , S. Guiriec , D. Hadasch , M. Hayashida , R. E. Hughes , R. Itoh , G. Johannesson , A. S. Johnson , H. Katagiri , J. Kataoka , J. Knodlseder , M. Kuss , J. Lande , S. Larsson , S. -H. Lee , F. Longo , F. Loparco , B. Lott , M. N. Lovellette , P. Lubrano , G. M. Madejski , M. N. Mazziotta , J. E. McEnery , J. Mehault , P. F. Michelson , W. Mitthumsiri , T. Mizuno , C. Monte , M. E. Monzani , A. Morselli , I. V. Moskalenko , S. Murgia , M. Naumann-Godo , S. Nishino , J. P. Norris , E. Nuss , T. Ohsugi , A. Okumura , N. Omodei , E. Orlando , M. Ozaki , D. Paneque , J. H. Panetta , V. Pelassa , M. Pesce-Rollins , M. Pierbattista , F. Piron , G. Pivato , T. A. Porter , S. Raino , R. Rando , D. Rastawicki , M. Razzano , A. Readhead , A. Reimer , O. Reimer , L. C. Reyes , J. L. Richards , C. Sbarra , C. Sgro , E. J. Siskind , G. Spandre , P. Spinelli , A. Szostek , H. Takahashi , T. Tanaka , J. G. Thayer , J. B. Thayer , D. J. Thompson , M. Tinivella , D. F. Torres , G. Tosti , E. Troja , T. L. Usher , J. Vandenbroucke , V. Vasileiou , G. Vianello , V. Vitale , A. P. Waite , B. L. Winer , K. S. Wood , Z. Yang , S. Zimmer , R. Moderski , K. Nalewajko , M. Sikora , M. Villata , C. M. Raiteri , H. D. Aller , M. F. Aller , A. A. Arkharov , E. Benitez , A. Berdyugin , D. A. Blinov , M. Boettcher , O. J. A. Bravo Calle , C. S. Buemi , D. Carosati , W. P. Chen , C. Diltz , A. Di Paola , M. Dolci , N. V. Efimova , E. Forn\' , M. A. Gurwell , J. Heidt , D. Hiriart , B. Jordan , G. Kimeridze , T. S. Konstantinova , E. N. Kopatskaya , E. Koptelova , O. M. Kurtanidze , A. Lahteenmaki , E. G. Larionova , L. V. Larionova , V. M. Larionov , P. Leto , E. Lindfors , H. C. Lin , D. A. Morozova , M. G. Nikolashvili , K. Nilsson , M. Oksman , P. Roustazadeh , A. Sievers , L. A. Sigua , A. Sillanpaa , T. Takahashi , L. O. Takalo , M. Tornikoski , C. Trigilio , I. S. Troitsky , G. Umana , E. Angelakis , T. P. Krichbaum , I. Nestoras , D. Riquelme , M. Krips , S. Trippe , A. Arai , K. S. Kawabata , K. Sakimoto , M. Sasada , S. Sato , M. Uemura , M. Yamanaka , M. Yoshida , T. Belloni , G. Tagliaferri , E. W. Bonning , J. Isler , C. M. Urry , E. Hoversten , A. Falcone , C. Pagani , M. Stroh

The ANTARES telescope is well suited to detect neutrinos produced in astrophysical transient sources as it can observe a full hemisphere of the sky at all times with a high duty cycle. The background and point source sensitivity can be…

高能天体物理现象 · 物理学 2019-08-13 D. Dornic

We report the detection of pulsed gamma-rays for PSRs J0631+1036, J0659+1414, J0742-2822, J1420-6048, J1509-5850 and J1718-3825 using the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope (formerly known as GLAST).…

太阳与恒星天体物理 · 物理学 2010-01-06 The Fermi LAT collaboration , the Fermi Pulsar Timing Consortium

We present cross-correlation studies of gamma-ray (0.1-300 GeV), X-ray (0.2-10 keV) and optical (R-band) variability of a sample of 26 blazars during 2008-2016. The light curves are from Fermi-LAT, Swift-XRT, and the Yale-SMARTS blazar…

高能天体物理现象 · 物理学 2020-04-08 Anwesh Majumder , Kaustav Mitra , Ritaban Chatterjee , C. M. Urry , C. D. Bailyn , Prantik Nandi

A direct search of $\gamma$-ray emission centered on multi-frequency selected candidates is a valuable complementary approach to the standard search adopted in current $\gamma$-ray Fermi-LAT catalogs. Our candidates are part of the 2WHSP…

高能天体物理现象 · 物理学 2017-02-15 Bruno Arsioli , Yu-Ling Chang

We used the data from the Fermi Gamma-ray Space Telescope to characterise the {\gamma}-ray flux variability of blazars on month-like time scales. Our sample consists of 1120 blazars of which 481 are flat spectrum radio quasars (FSRQs) and…

高能天体物理现象 · 物理学 2020-02-12 Bhoomika Rajput , C. S. Stalin , Suvendu Rakshit

The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed contemporaneously by the Very Long Baseline Array (VLBA). In total, 232 sources were observed with…

The Large Area Telescope, the primary instrument on the Fermi Gamma-ray Space Telescope, is an imaging, wide field-of-view gamma-ray telescope. After many improvements to the data acquisition and event analysis procedures, it now covers the…

天体物理仪器与方法 · 物理学 2023-05-24 R. Rando

The Large Area Telescope (LAT) on board the \emph{Fermi} Gamma-ray Space Telescope has been continuously providing good quality survey data of the entire sky in the high energy range from 30 MeV to 500 GeV and above since August 2008. A…

高能天体物理现象 · 物理学 2025-10-13 A. Pathania , K. K. Singh , S. K. Singh , A. Tolamatti , B. B. Singh , K. K. Yadav

We present multi-epoch observations from the Submillimeter Array (SMA) for a sample of 171 bright blazars, 43 of which were detected by Fermi during the first three months of observations. We explore the correlation between their gamma-ray…

高能天体物理现象 · 物理学 2010-01-07 Allison L. Strom , Aneta Siemiginowska , Mark A. Gurwell , Brandon C. Kelly

Millimeter-band polarimetry offers a powerful probe of AGN jets, accessing regions less affected by opacity and Faraday rotation than at longer radio wavelengths. As part of the POLAMI program, we have conducted 14 years of 1 mm and 3 mm…

We describe an ongoing optical spectrophotometric monitoring program of a sample of Fermi/LAT bright sources showing prominent and variable {\gamma}-ray emission, with the 2.1m telescope at Observatorio Astrof\'isico Guillermo Haro (OAGH)…

高能天体物理现象 · 物理学 2013-04-19 V. Patiño-Álvarez , V. Chavushyan , J. León-Tavares , J. R. Valdés , A. Carramiñana , L. Carrasco , J. Torrealba

In this paper we present the Fermi All-sky Variability Analysis (FAVA), a tool to systematically study the variability of the gamma-ray sky measured by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope. For each…

高能天体物理现象 · 物理学 2013-07-15 LAT Collaboration

The Fermi Gamma-ray Burst Monitor (GBM) detects gamma-rays in the energy range 8 keV - 40 MeV. We developed a new background fitting process of these data, based on the motion of the satellite. Here we summarize this method, called…

高能天体物理现象 · 物理学 2013-03-14 Dorottya Szécsi , Zsolt Bagoly , József Kóbori , Lajos G. Balázs , István Horváth

Fast radio bursts (FRBs) are one of the most exciting new mysteries of astrophysics. Their origin is still unknown, but recent observations seem to link them to soft gamma repeaters and, in particular, to magnetar giant flares (MGFs). The…

高能天体物理现象 · 物理学 2023-01-18 Giacomo Principe , Niccolò Di Lalla , Leonardo Di Venere , Michela Negro , Francesco Longo