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The COBE satellite has provided the only comprehensive multi-frequency full-sky observations of the microwave sky available today. Assessment of the observations requires a detailed likelihood analysis to extract the maximum amount of…

Astrophysics · Physics 2007-05-23 K. M. Gorski

We present measurements of anisotropy in the Cosmic Microwave Background (CMB) from the first season of observations with the Degree Angular Scale Interferometer (DASI). The instrument was deployed at the South Pole in the austral summer…

Radio interferometers are well suited to studies of both total intensity and polarized intensity fluctuations of the cosmic microwave background radiation, and they have been used successfully in measurements of both the primary and…

Astrophysics · Physics 2007-05-23 A. C. S. Readhead , T. J. Pearson

Angular power spectrum of the cosmic microwave background (CMB) temperature anisotropies is one of the most important on characteristics of the Universe such as its geometry and total density. Using flat sky approximation and Fourier…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Lung-Yih Chiang , Fei-Fan Chen

We present the first targeted measurement of the power spectrum of anisotropies of the radio synchrotron background, at 140 MHz where it is the overwhelmingly dominant photon background. This measurement is important for understanding the…

Cosmology and Nongalactic Astrophysics · Physics 2023-07-06 A. R. Offringa , J. Singal , S. Heston , S. Horiuchi , D. M. Lucero

The cosmic microwave anisotropies in a scenario of large scale structure formation with cold dark matter and texture are discussed and compared with recent observational results of the COBE satellite. A couple of important statistical…

Astrophysics · Physics 2008-11-26 R. Durrer , A. Howard , Z. -H. Zhou

We present the angular power spectrum derived from the first-year Wilkinson Microwave Anisotropy Probe (WMAP) sky maps. We study a variety of power spectrum estimation methods and data combinations and demonstrate that the results are…

The Microwave Anisotropy Probe and Planck missions will provide low noise maps of the temperature of the cosmic microwave background (CMB). These maps will allow measurement of the power spectrum of the CMB with measurement noise below…

During the past two decades, experiments in both the Northern and Southern hemispheres have observed a small but measurable energy-dependent sidereal anisotropy in the arrival direction distribution of galactic cosmic rays. The relative…

High Energy Astrophysical Phenomena · Physics 2015-10-16 The HAWC Collaboration , The IceCube Collaboration

We review the present status of Cosmic Microwave Background (CMB) anisotropy observations and discuss the main related astrophysical issues, instrumental effects and data analysis techniques. We summarise the balloon-borne and ground-based…

Astrophysics · Physics 2007-05-23 M. Bersanelli , D. Maino , A. Mennella

We report cosmic microwave background (CMB) power spectrum measurements from the first 100 sq. deg. field observed by the South Pole Telescope (SPT) at 150 and 220 GHz. On angular scales where the primary CMB anisotropy is dominant, ell ~<…

We report the first measurements of anisotropy in the cosmic microwave background (CMB) radiation with the Arcminute Cosmology Bolometer Array Receiver (ACBAR). The instrument was installed on the 2.1m Viper telescope at the South Pole in…

We present the first three-frequency South Pole Telescope (SPT) cosmic microwave background (CMB) power spectra. The band powers presented here cover angular scales 2000 < ell < 9400 in frequency bands centered at 95, 150, and 220 GHz. At…

We present an internal consistency test of South Pole Telescope (SPT) measurements of the cosmic microwave background (CMB) temperature anisotropy using three-band data from the SPT-SZ survey. These measurements are made from observations…

The spectral variation of the cosmic microwave background (CMB) as observed by WMAP was tested using foreground reduced WMAP5 data, by producing subtraction maps at the 1$^\circ$ angular resolution between the two cosmological bands of V…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 Bi-Zhu Jiang , Richard Lieu , Shuang-Nan Zhang , Bart Wakker

We report on observations of the Cosmic Microwave Background (CMB) obtained during the January 2003 flight of Boomerang . These results are derived from 195 hours of observation with four 145 GHz Polarization Sensitive Bolometer (PSB)…

There have recently been several claims of an asymmetric distribution of large scale fluctuations in the WMAP data. I review some recent results from a test of isotropy of the power spectrum at all scales and show how the power is…

Astrophysics · Physics 2007-05-23 F. K. Hansen

Observations from the first flight of the Medium Scale Anisotropy Measurement (MSAM) are analyzed to place limits on Gaussian fluctuations in the Cosmic Microwave Background Radiation (CMBR). This instrument chops a 30\arcmin\ beam in a 3…

We present measurements of the cosmic microwave background (CMB) power spectrum made by the Atacama Cosmology Telescope at 148 GHz and 218 GHz, as well as the cross-frequency spectrum between the two channels. Our results clearly show the…

We report on the observation of anisotropy in the arrival direction distribution of cosmic rays at PeV energies. The analysis is based on data taken between 2009 and 2012 with the IceTop air shower array at the South Pole. IceTop, an…

High Energy Astrophysical Phenomena · Physics 2013-02-19 IceCube Collaboration , M. G. Aartsen , R. Abbasi , Y. Abdou , M. Ackermann , J. Adams , J. A. Aguilar , M. Ahlers , D. Altmann , K. Andeen , J. Auffenberg , X. Bai , M. Baker , S. W. Barwick , V. Baum , R. Bay , K. Beattie , J. J. Beatty , S. Bechet , J. Becker Tjus , K. -H. Becker , M. Bell , M. L. Benabderrahmane , S. BenZvi , J. Berdermann , P. Berghaus , D. Berley , E. Bernardini , D. Bertrand , D. Z. Besson , D. Bindig , M. Bissok , E. Blaufuss , J. Blumenthal , D. J. Boersma , S. Bohaichuk , C. Bohm , D. Bose , S. Böser , O. Botner , L. Brayeur , A. M. Brown , R. Bruijn , J. Brunner , M. Carson , J. Casey , M. Casier , D. Chirkin , B. Christy , K. Clark , F. Clevermann , S. Cohen , D. F. Cowen , A. H. Cru. Silva , M. Danninger , J. Daughhetee , J. C. Davis , C. D. Clercq , S. D. Ridder , F. Descamps , P. Desiati , G. d. Vries-Uiterweerd , T. DeYoung , J. C. Díaz-Vélez , J. Dreyer , J. P. Dumm , M. Dunkman , R. Eagan , J. Eisch , R. W. Ellsworth , O. Engdegård , S. Euler , P. A. Evenson , O. Fadiran , A. R. Fazely , A. Fedynitch , J. Feintzeig , T. Feusels , K. Filimonov , C. Finley , T. Fischer-Wasels , S. Flis , A. Franckowiak , R. Franke , K. Frantzen , T. Fuchs , T. K. Gaisser , J. Gallagher , L. Gerhardt , L. Gladstone , T. Glüsenkamp , A. Goldschmidt , G. Golup , J. A. Goodman , D. Góra , D. Grant , A. Groß , S. Grullon , M. Gurtner , C. Ha , A. Ha. Ismail , A. Hallgren , F. Halzen , K. Hanson , D. Heereman , P. Heimann , D. Heinen , K. Helbing , R. Hellauer , S. Hickford , G. C. Hill , K. D. Hoffman , R. Hoffmann , A. Homeier , K. Hoshina , W. Huelsnitz , P. O. Hulth , K. Hultqvist , S. Hussain , A. Ishihara , E. Jacobi , J. Jacobsen , G. S. Japaridze , O. Jlelati , A. Kappes , T. Karg , A. Karle , J. Kiryluk , F. Kislat , J. Kläs , S. R. Klein , J. -H. Köhne , G. Kohnen , H. Kolanoski , L. Köpke , C. Kopper , S. Kopper , D. J. Koskinen , M. Kowalski , M. Krasberg , G. Kroll , J. Kunnen , N. Kurahashi , T. Kuwabara , M. Labare , H. Landsman , M. J. Larson , R. Lauer , M. Lesiak-Bzdak , J. Lünemann , J. Madsen , R. Maruyama , K. Mase , H. S. Matis , F. McNally , K. Meagher , M. Merck , P. Mészáros , T. Meures , S. Miarecki , E. Middell , N. Milke , J. Miller , L. Mohrmann , T. Montaruli , R. Morse , R. Nahnhauer , U. Naumann , S. C. Nowicki , D. R. Nygren , A. Obertacke , S. Odrowski , A. Olivas , M. Olivo , A. O'Murchadha , S. Panknin , L. Paul , J. A. Pepper , C. Pérez de los Heros , D. Pieloth , N. Pirk , J. Posselt , P. B. Price , G. T. Przybylski , L. Rädel , K. Rawlins , P. Redl , E. Resconi , W. Rhode , M. Ribordy , M. Richman , B. Riedel , J. P. Rodrigues , F. Rothmaier , C. Rott , T. Ruhe , B. Ruzybayev , D. Ryckbosch , S. M. Saba , T. Salameh , H. -G. Sander , M. Santander , S. Sarkar , K. Schatto , M. Scheel , F. Scheriau , T. Schmidt , M. Schmitz , S. Schoenen , S. Schöneberg , L. Schönherr , A. Schönwald , A. Schukraft , L. Schulte , O. Schulz , D. Seckel , S. H. Seo , Y. Sestayo , S. Seunarine , C. Sheremata , M. W. E. Smith , M. Soiron , D. Soldin , G. M. Spiczak , C. Spiering , M. Stamatikos , T. Stanev , A. Stasik , T. Stezelberger , R. G. Stokstad , A. Stößl , E. A. Strahler , R. Ström , G. W. Sullivan , H. Taavola , I. Taboada , A. Tamburro , S. Ter-Antonyan , S. Tilav , P. A. Toale , S. Toscano , M. Usner , D. va. de. Drift , N. va. Eijndhoven , A. Va. Overloop , J. va. Santen , M. Vehring , M. Voge , M. Vraeghe , C. Walck , T. Waldenmaier , M. Wallraff , M. Walter , R. Wasserman , Ch. Weaver , C. Wendt , S. Westerhoff , N. Whitehorn , K. Wiebe , C. H. Wiebusch , D. R. Williams , H. Wissing , M. Wolf , T. R. Wood , K. Woschnagg , C. Xu , D. L. Xu , X. W. Xu , J. P. Yanez , G. Yodh , S. Yoshida , P. Zarzhitsky , J. Ziemann , S. Zierke , A. Zilles , M. Zoll