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After proposing a new method of deriving the atmospheric time constant from the speed of focus variations (Kellerer & Tokovinin 2007), we now implement it with the new instrument, FADE. FADE uses a 36-cm Celestron telescope that is modified…

Astrophysics · Physics 2009-11-13 A. Tokovinin , A. Kellerer , V. Coude Du Foresto

We analyse the implications of future observations of the CMB absolute temperature at centimeter and decimeter wavelengths, necessary to complement the accurate COBE/FIRAS data. Our analysis shows that forthcoming ground and balloon…

Astrophysics · Physics 2009-11-07 C. Burigana , R. Salvaterra

We characterize the optical coherence and energy-level properties of the 795 nm $^3$H$_6$ to $^3$H$_4$ transition of Tm$^{3+}$ in a Ti$^{4+}$:LiNbO$_{3}$ waveguide at temperatures as low as 0.65 K. Coherence properties are measured with…

The Kondo and Periodic Anderson Model (PAM) are known to provide a microscopic picture of many of the fundamental properties of heavy fermion materials and, more generally, a variety of strong correlation phenomena in $4f$ and $5f$ systems.…

Strongly Correlated Electrons · Physics 2019-05-10 N. C. Costa , T. Mendes-Santos , T. Paiva , N. J. Curro , R. R. dos Santos , R. T. Scalettar

We have analyzed 44.3M single muons collected by MACRO from 1991 through 2000 in 2,145 live days of operation. We have searched for the solar diurnal, apparent sidereal, and pseudo-sidereal modulation of the underground muon rate by…

Astrophysics · Physics 2008-11-26 The MACRO Collaboration , M. Ambrosio

The redshifted 21-cm signal from the dark ages offers a powerful probe of cosmological models and the underlying dark matter (DM) microphysics. We investigate deviations from the standard $\Lambda$CDM prediction, an absorption trough of…

Cosmology and Nongalactic Astrophysics · Physics 2026-04-15 Debarun Paul , Sourav Pal , Deepthi Moorkanat , Antara Dey , Amit Dutta Banik , Rajesh Mondal

Various dark matter models predict annual and diurnal modulations of dark matter interaction rates in Earth-based experiments as a result of the Earth's motion in the halo. Observation of such features can provide generic evidence for…

We present the temperature and polarization angular power spectra measured by the Atacama Cosmology Telescope Polarimeter (ACTPol). We analyze night-time data collected during 2013-14 using two detector arrays at 149 GHz, from 548 deg$^2$…

Site measurements were collected at Mount John University Observatory in 2005 and 2007 using a purpose-built scintillation detection and ranging system. $C_n^2(h)$ profiling indicates a weak layer located at 12 - 14 km above sea level and…

Instrumentation and Methods for Astrophysics · Physics 2010-09-17 J. L. Mohr , R. A. Johnston , P. L. Cottrell

Submillimetre/TeraHertz (e.g. 200, 350, 450 microns) astronomy is the prime technique to unveil the birth and early evolution of a broad range of astrophysical objects. A major obstacle to carry out submm observations from ground is the…

Planck's Cosmic Microwave Background temperature and polarization observations are the premier dataset for constraining cosmological models. Cosmic variance limited temperature at large and intermediate scales today dominates the…

Cosmology and Nongalactic Astrophysics · Physics 2023-01-18 Adrien La Posta , Umberto Natale , Erminia Calabrese , Xavier Garrido , Thibaut Louis

The High-Altitude Water Cherenkov (HAWC) observatory was designed to study gamma-ray sources in the energy range between a few hundred GeV up to few hundred TeV. It is composed of 300 Water Cherenkov Detectors (WCDs) that cover a surface of…

High Energy Astrophysical Phenomena · Physics 2025-07-31 Cindy Castellón , Hermes León Vargas

We present a model where an unstable MeV Majorana tau \neu can naturally reconcile the cold dark matter model (CDM) with cosmological observations of large and small scale density fluctuations and, simultaneously, with data on solar and…

High Energy Physics - Phenomenology · Physics 2009-09-25 Anjan S. Joshipura , Jose W. F. Valle

We measured the height of the chromospheric network in the 1700, 1600, and 304 A wavelength bands of the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) from the shift of features on the disk with respect to…

Solar and Stellar Astrophysics · Physics 2020-01-08 C. E. Alissandrakis

We propose a new method to measure the system noise temperature, $T_{\rm sys}$, using a 2-bit analog-to-digital converter (ADC). The statistics of the digitized signal in a four-level quantization brings us information about the bias…

Instrumentation and Methods for Astrophysics · Physics 2015-05-19 Aki Nakatake , Seiji Kameno , Koji Takeda

We have measured the flux of cosmic muons in the Laboratori Nazionali del Gran Sasso at 3800\,m\,w.e. to be $(3.432 \pm 0.003)\cdot 10^{-4}\,\mathrm{{m^{-2}s^{-1}}}$ based on ten years of Borexino data acquired between May 2007 and May…

High Energy Physics - Experiment · Physics 2019-03-06 The Borexino Collaboration , M. Agostini , K. Altenmüller , S. Appel , V. Atroshchenko , Z. Bagdasarian , D. Basilico , G. Bellini , J. Benziger , D. Bick , I. Bolognino , G. Bonfini , D. Bravo , B. Caccianiga , F. Calaprice , A. Caminata , S. Caprioli , M. Carlini , P. Cavalcante , F. Cavanna , A. Chepurnov , K. Choi , L. Collica , D. D'Angelo , S. Davini , A. Derbin , X. F. Ding , A. Di Ludovico , L. Di Noto , I. Drachnev , K. Fomenko , A. Formozov , D. Franco , F. Gabriele , C. Galbiati , M. Gschwender , C. Ghiano , M. Giammarchi , A. Goretti , M. Gromov , D. Guffanti , C. Hagner , T. Houdy , E. Hungerford , Aldo Ianni , Andrea Ianni , A. Jany , D. Jeschke , V. Kobychev , D. Korablev , G. Korga , V. A. Kudryavtsev , S. Kumaran , T. Lachenmaier , M. Laubenstein , E. Litvinovich , F. Lombardi , P. Lombardi , L. Ludhova , G. Lukyanchenko , L. Lukyanchenko , I. Machulin , G. Manuzio , S. Marcocci , J. Maricic , J. Martyn , S. Meighen-Berger , E. Meroni , M. Meyer , L. Miramonti , M. Misiaszek , V. Muratova , B. Neumair , M. Nieslony , L. Oberauer , B. Opitz , V. Orekhov , F. Ortica , M. Pallavicini , L. Papp , Ö. Penek , L. Pietrofaccia , N. Pilipenko , A. Pocar , A. Porcelli , G. Raikov , G. Ranucci , A. Razeto , A. Re , M. Redchuk , A. Romani , N. Rossi , S. Rottenanger , S. Schönert , D. Semenov , M. Skorokhvatov , O. Smirnov , A. Sotnikov , L. F. F. Stokes , Y. Suvorov , R. Tartaglia , G. Testera , J. Thurn , M. Toropova , E. Unzhakov , A. Vishneva , R. B. Vogelaar , F. von Feilitzsch , S. Weinz , M. Wojcik , M. Wurm , Z. Yokley , O. Zaimidoroga , S. Zavatarelli , K. Zuber , G. Zuzel

The Observatorio del Roque de los Muchachos will host the northern site of the Cherenkov Telescope Array Observatory (CTAO), in an area about 200 m below the mountain rim, where the optical telescopes are located. The site currently hosts…

Results of a multi-color study of the variability of the magnetic cataclysmic variable BY Cam are presented. The observations were obtained at the Korean 1.8m and Ukrainian 2.6m, 1.2m and 38-cm telescopes in 2003-2005, 56 observational runs…

The terahertz and far-infrared (FIR) band, from approximately 0.3 THz to 15 THz (1 mm to 20 micron), is important for astrophysics as the thermal radiation of much of the universe peaks at these wavelengths and many spectral lines that…

Instrumentation and Methods for Astrophysics · Physics 2016-09-21 Sheng-Cai Shi , Scott Paine , Qi-Jun Yao , Zhen-Hui Lin , Xin-Xing Li , Wen-Ying Duan , Hiroshi Matsuo , Qizhou Zhang , Ji Yang , M. C. B. Ashley , Zhaohui Shang , Zhong-Wen Hu

We analyze the recently released CoGeNT data with a focus on their time-dependent properties. Using various statistical techniques, we confirm the presence of modulation in the data, and find a significant component at high (E_{ee} > 1.5$…

High Energy Physics - Phenomenology · Physics 2013-05-30 Patrick J. Fox , Joachim Kopp , Mariangela Lisanti , Neal Weiner