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We employ an efficient method for identifying gamma-ray sources across the entire sky, leveraging advanced algorithms from Fermi p y, and cleverly utilizing the Galactic diffuse background emission model to partition the entire sky into 72…

High Energy Astrophysical Phenomena · Physics 2024-12-30 Y. C. Xiang , P. Feng , X. F. Lan

We present results from the first two years of our fast-cadence 15 GHz gamma-ray blazar monitoring program, part of the F-GAMMA radio monitoring project. Our sample includes the 1158 blazars north of -20 degrees declination from the…

We describe an image-based method that uses two radio criteria, compactness and spectral index, to identify promising pulsar candidates among Fermi Large Area Telescope (LAT) unassociated sources. These criteria are applied to those radio…

We present a three epoch survey for transient and variables in the extended Chandra Deep Field South at 5.5 GHz with the Australia Telescope Compact Array. A region covering $\sim$0.3 deg$^{2}$ was observed on timescales of 2.5 months and…

Astrophysics of Galaxies · Physics 2015-06-17 M. E. Bell , M. T. Huynh , P. Hancock , Tara Murphy , B. M. Gaensler , D. Burlon , C. Trott , K. Bannister

In our first paper we described three regions of the 9C survey of radio sources with the Ryle telescope at 15.2 GHz, constituting a total area of 520 deg^2 to a completeness limit of approximately 25 mJy. Here we report on a series of…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 E. M. Waldram , G. G. Pooley , M. L. Davies , K. J. B. Grainge , P. F. Scott

We report optical-infrared (IR) properties of faint 1.3 mm sources (S_1.3mm = 0.2-1.0 mJy) detected with the Atacama Large Millimeter/submillimeter Array (ALMA) in the Subaru/XMM-Newton Deep Survey (SXDS) field. We searched for optical/IR…

Astrophysics of Galaxies · Physics 2015-09-16 Bunyo Hatsukade , Kouji Ohta , Kiyoto Yabe , Akifumi Seko , Ryu Makiya , Masayuki Akiyama

The HAWC (High Altitude Water Cherenkov) collaboration recently published their 2HWC catalog, listing 39 very high energy (VHE; >100~GeV) gamma-ray sources based on 507 days of observation. Among these, there are nineteen sources that are…

High Energy Astrophysical Phenomena · Physics 2018-11-02 VERITAS Collaboration , A. U. Abeysekara , A. Archer , W. Benbow , R. Bird , R. Brose , M. Buchovecky , J. H. Buckley , V. Bugaev , A. J. Chromey , M. P. Connolly , W. Cui , M. K. Daniel , A. Falcone , Q. Feng , J. P. Finley , L. Fortson , A. Furniss , M. Hutten , D. Hanna , O. Hervet , J. Holder , G. Hughes , T. B. Humensky , C. A. Johnson , P. Kaaret , P. Kar , M. Kertzman , D. Kieda , M. Krause , F. Krennrich , S. Kumar , M. J. Lang , T. T. Y. Lin , S. McArthur , P. Moriarty , R. Mukherjee , S. O'Brien , R. A. Ong , A. N. Otte , N. Park , A. Petrashyk , M. Pohl , E. Pueschel , J. Quinn , K. Ragan , P. T. Reynolds , G. T. Richards , E. Roache , C. Rulten , I. Sadeh , M. Santander , G. H. Sembroski , K. Shahinyan , I. Sushch , J. Tyler , S. P. Wakely , A. Weinstein , R. M. Wells , P. Wilcox , A. Wilhelm , D. A. Williams , T. J. Williamson , B. Zitzer , Fermi-LAT Collaboration , : , S. Abdollahi , M. Ajello , L. Baldini , G. Barbiellini , D. Bastieri , R. Bellazzini , B. Berenji , E. Bissaldi , R. D. Blandford , R. Bonino , E. Bottacini , T. J. Brandt , P. Bruel , R. Buehler , R. A. Cameron , R. Caputo , P. A. Caraveo , D. Castro , E. Cavazzuti , E. Charles , G. Chiaro , S. Ciprini , J. Cohen-Tanugi , D. Costantin , S. Cutini , F. D'Ammando , F. de Palma , N. Di Lalla , M. Di Mauro , L. Di Venere , A. Dominguez , C. Favuzzi , S. J. Fegan , A. Franckowiak , Y. Fukazawa , S. Funk , P. Fusco , F. Gargano , D. Gasparrini , N. Giglietto , F. Giordano , M. Giroletti , D. Green , I. A. Grenier , L. Guillemot , S. Guiriec , E. Hays , J. W. Hewitt , D. Horan , G. Johannesson , S. Kensei , M. Kuss , S. Larsson , L. Latronico , M. Lemoine-Goumard , J. Li , F. Longo , F. Loparco , M. N. Lovellette , P. Lubrano , J. D. Magill , S. Maldera , M. N. Mazziotta , J. E. McEnery , P. F. Michelson , W. Mitthumsiri , T. Mizuno , M. E. Monzani , A. Morselli , I. V. Moskalenko , M. Negro , E. Nuss , R. Ojha , N. Omodei , M. Orienti , E. Orlando , M. Palatiello , V. S. Paliya , D. Paneque , J. S. Perkins , M. Persic , M. Pesce-Rollins , V. Petrosian , F. Piron , T. A. Porter , G. Principe , S. Raino , R. Rando , B. Rani , M. Razzano , S. Razzaque , A. Reimer , O. Reimer , T. Reposeur , C. Sgro , E. J. Siskind , G. Spandre , P. Spinelli , D. J. Suson , H. Tajima , J. B. Thayer , D. J. Thompson , D. F. Torres , G. Tosti , E. Troja , J. Valverde , G. Vianello , M. Vogel , K. Wood , M. Yassine , HAWC Collaboration , : , R. Alfaro , C. Alvarez , J. D. Alvarez , R. Arceo , J. C. Arteaga-Velazquez , D. Avila Rojas , H. A. Ayala Solares , A. Becerril , E. Belmont-Moreno , S. Y. BenZvi , A. Bernal , J. Braun , C. Brisbois , K. S. Caballero-Mora , T. Capistran , A. Carraminana , S. Casanova , M. Castillo , U. Cotti , J. Cotzomi , S. Coutino de Leon , C. De Leon , E. De la Fuente , S. Dichiara , B. L. Dingus , M. A. DuVernois , J. C. Diaz-Velez , K. Engel , O. Enriquez-Rivera , D. W. Fiorino , H. Fleischhack , N. Fraija , J. A. Garcia-Gonzalez , F. Garfias , A. Gonzalez Munoz , M. M. Gonzalez , J. A. Goodman , Z. Hampel-Arias , J. P. Harding , S. Hernandez , A. Hernandez-Almada , B. Hona , F. Hueyotl-Zahuantitla , C. M. Hui , P. Huntemeyer , A. Iriarte , A. Jardin-Blicq , V. Joshi , S. Kaufmann , A. Lara , R. J. Lauer , W. H. Lee , D. Lennarz , H. Leon Vargas , J. T. Linnemann , A. L. Longinotti , G. Luis-Raya , R. Luna-Garcia , R. Lopez-Coto , K. Malone , S. S. Marinelli , O. Martinez , I. Martinez-Castellanos , J. Martinez-Castro , H. Martinez-Huerta , J. A. Matthews , P. Miranda-Romagnoli , E. Moreno , M. Mostafa , A. Nayerhoda , L. Nellen , M. Newbold , M. U. Nisa , R. Noriega-Papaqui , R. Pelayo , J. Pretz , E. G. Perez-Perez , Z. Ren , C. D. Rho , C. Riviere , D. Rosa-Gonzalez , M. Rosenberg , E. Ruiz-Velasco , H. Salazar , F. Salesa Greus , A. Sandoval , M. Schneider , M. Seglar Arroyo , G. Sinnis , A. J. Smith , R. W. Springer , P. Surajbali , I. Taboada , O. Tibolla , K. Tollefson , I. Torres , T. N. Ukwatta , L. Villasenor , T. Weisgarber , S. Westerhoff , I. G. Wisher , J. Wood , T. Yapici , G. Yodh , A. Zepeda , H. Zhou

We report on the detection of a gamma-ray source at the position of the nearby star-forming galaxy (SFG) M83, which is found from our analysis of 14 years of the data obtained with the Large Area Telescope (LAT) on-board {\it Fermi…

High Energy Astrophysical Phenomena · Physics 2023-08-02 Yi Xing , Zhongxiang Wang

In an attempt to constrain and understand the emission mechanism of gamma rays, we perform a cross-correlation analysis of 15 blazars using light curves in millimetre, optical and gamma rays. We use discrete correlation function and…

High Energy Astrophysical Phenomena · Physics 2015-12-15 V. Ramakrishnan , T. Hovatta , M. Tornikoski , K. Nilsson , E. Lindfors , M. Baloković , A. Lähteenmäki , R. Reinthal , L. Takalo

We have conducted an HI 21 cm emission-line survey of six loose groups of galaxies chosen to be analogs to the Local Group. The survey was conducted using the Parkes Multibeam instrument and the Australia Telescope Compact Array (ATCA) over…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 D. J. Pisano , D. G. Barnes , L. Staveley-Smith , B. K. Gibson , V. A. Kilborn , K. C. Freeman

We present a systematic search for spatial association between a high confidence sample of 3,166 morphologically selected galaxy mergers drawn from the initial convolutional neural network (CNN) catalog of 328,151 candidate mergers and…

High Energy Astrophysical Phenomena · Physics 2025-09-15 Siddhant Manna , Shantanu Desai

We present a catalogue of ALMA flux density measurements of 754 calibrators observed between August 2012 and September 2017, for a total of 16,263 observations in different bands and epochs. The flux densities were measured reprocessing the…

We present radio observations for 29 southern Seyfert galaxies selected from a volume limited sample with cz<3600 km s^-1, and declination delta<0degr. Objects with declination -30degr<delta<0degr were observed with the Very Large Array…

Astrophysics · Physics 2009-10-31 R. Morganti , Z. I. Tsvetanov , J. Gallimore , M. G. Allen

We present deep optical and X-ray follow-up observations of the bright unassociated Fermi-LAT gammaray source 1FGL J1311.7-3429. The source was already known as an unidentified EGRET source (3EG J1314-3431, EGR J1314-3417), hence its nature…

High Energy Astrophysical Phenomena · Physics 2015-06-11 J. Kataoka , Y. Yatsu , N. Kawai , Y. Urata , C. C. Cheung , Y. Takahashi , K. Maeda , T. Totani , R. Makiya , H. Hanayama , T. Miyaji , A. Tsai

We present the third Fermi Large Area Telescope source catalog (3FGL) of sources in the 100 MeV-300 GeV range. Based on the first four years of science data from the Fermi Gamma-ray Space Telescope mission, it is the deepest yet in this…

High Energy Astrophysical Phenomena · Physics 2015-06-10 LAT Collaboration

We describe a sample of thirteen bright (18.5<Bj<20.1) compact galaxies at low redshift (0.05<z<0.21) behind the Fornax Cluster. These galaxies are unresolved on UK Schmidt sky survey plates, so would be missing from most galaxy catalogs…

In the latest data release from the Fermi $\gamma$-ray Space Telescope (the 4th Fermi LAT 14 yr Catalog, or 4FGL), more than 50% of the Galactic sources are yet to be identified. We observed 13 unidentified Fermi LAT sources with the…

High Energy Astrophysical Phenomena · Physics 2024-08-30 Blagoy Rangelov , Hui Yang , Brice Williams , Oleg Kargaltsev , Jeremy Hare , Kean Martinic

We present preliminary results from a VLBI survey at $\lambda=6 $cm of a sample of 35 sources with flux densities of 2 - 100 mJy. These sources were selected from the VLA FIRST survey at $\lambda = 20 $cm, in a 3 degree field around the…

Astrophysics · Physics 2009-10-31 S. T. Garrington , M. A. Garrett , A. Polatidis

We have selected a sample of 80 candidates for obscured radio-loud active galactic nuclei and presented their basic optical/near-infrared (NIR) properties in Paper 1. In this paper, we present both high-resolution radio continuum images for…

Astrophysics of Galaxies · Physics 2016-03-16 Ting Yan , John T. Stocke , Jeremy Darling , Emmanuel Momjian , Soniya Sharma , Nissim Kanekar

We report the serendipitous discovery of transient, point-like high energy gamma-ray emission coincident with the position of the suspected BL Lac object 5C 3.178. The source was detected using the Fermi Large Area Telescope (LAT) at a…

High Energy Astrophysical Phenomena · Physics 2013-04-18 Hugh Dickinson , Christian Farnier