Related papers: The 2025 June 01 Forbush Decrease measured over a …

The Implication of Enhanced Cosmic Ray Diurnal Anisotropy on the Global Simultaneity of Forbush Decreases: A Statistical Approach

The short-term rapid CR flux depressions, generally referred to as Forbush decreases (FDs), are the most spectacular time-intensity CR variation. The need for analytical transformation of the observational CR time series data, to account…

Instrumentation and Methods for Astrophysics · Physics 2024-06-11 O. Okike , J. A. Alhassan , I. O. Eya

The scaler mode in the Pierre Auger Observatory to study heliospheric modulation of cosmic rays

The impact of the solar activity on the heliosphere has a strong influence on the modulation of the flux of low energy galactic cosmic rays arriving at Earth. Different instruments, such as neutron monitors or muon detectors, have been…

Solar and Stellar Astrophysics · Physics 2019-08-13 S. Dasso , H. Asorey

Differential Speckle Polarimetry of Betelgeuse in 2019-2020: the rise is different from the fall

Recently published episodic spectral (Levesque and Massey, 2020) and high angular resolution (Montarges et al, 2020) observations of Betelgeuse suggest that the deep minimum of 2019-2020 was caused by an enhanced dust abundance in the…

Solar and Stellar Astrophysics · Physics 2020-05-12 Boris Safonov , Alexandr Dodin , Marina Burlak , Maria Goliguzova , Anna Fedoteva , Sergei Zheltoukhov , Sergei Lamzin , Ivan Strakhov , Olga Voziakova

Measurement of energy differential spectrum of cosmic-ray muons below 400 MeV

Recent applications of cosmic-ray muons require accurate modeling of their flux at low-energy. However, no measurement has been reported below 400 MeV. Therefore, we developed a full-absorption muon energy spectrometer to obtain energy…

Applied Physics · Physics 2022-08-24 Hikaru Sato , Tadahiro Kin , Andrea Giammanco

Atmospheric muon flux suppression at potential new low-radiation underground physics laboratory in Israel

The residual atmospheric muon flux was measured at a candidate site for a new underground, low-radiation physics laboratory beneath the Kokhav HaYarden national park in Israel. Located inside the tunnels of a hydroelectric pumped-storage…

Instrumentation and Detectors · Physics 2025-04-22 Nadav Hargittai , Igor Zolkin , Yiftah Silver , Yan Benhammou , Gilad Mizrachi , Hagar Landsman , Erez Etzion , Ran Budnik

Transient Heliosheath Modulation

Voyager 1 has explored the solar wind-interstellar medium interaction region between the terminal shock and heliopause following the intensity distribution of galactic cosmic ray protons above 200 MeV energy. Before this component reached…

Solar and Stellar Astrophysics · Physics 2015-09-09 J. J. Quenby , W. R. Webber

Measurement of cosmic-ray muon flux at CJPL-II

In China Jinping Underground Laboratory (CJPL), the deepest and largest underground laboratory globally, the cosmic-ray muon flux is significantly reduced due to the substantial shielding provided by the overlying mountain. From 2016 to…

High Energy Astrophysical Phenomena · Physics 2025-11-17 P. Zhang , H. Ma , W. Dai , M. Jing , L. Yang , Q. Yue , Z. Zeng , J. Cheng

High rigidity Forbush decreases: due to CMEs or shocks?

We seek to identify the primary agents causing Forbush decreases (FDs) observed at the Earth in high rigidity cosmic rays. In particular, we ask if such FDs are caused mainly by coronal mass ejections (CMEs) from the Sun that are directed…

Solar and Stellar Astrophysics · Physics 2016-11-03 Arun Babu , H. M. Antia , S. R. Dugad , S. K. Gupta , Y. Hayashi , S. Kawakami , P. K. Mohanty , T. Nonaka , A. Oshima , P. Subramanian

Characteristics and energy dependence of recurrent galactic cosmic-ray flux depressions and of a Forbush decrease with LISA Pathfinder

Galactic cosmic-ray (GCR) energy spectra observed in the inner heliosphere are modulated by the solar activity, the solar polarity and structures of solar and interplanetary origin. A high counting rate particle detector (PD) aboard LISA…

Space Physics · Physics 2018-04-30 M. Armano , H. Audley , J. Baird , M. Bassan , S. Benella , P. Binetruy , M. Born , D. Bortoluzzi , A. Cavalleri , A. Cesarini , A. M. Cruise , K. Danzmann , M. de Deus Silva , I. Diepholz , G. Dixon , R. Dolesi , M. Fabi , L. Ferraioli , V. Ferroni , N. Finetti , E. D. Fitzsimons , M. Freschi , L. Gesa , F. Gibert , D. Giardini , R. Giusteri , C. Grimani , J. Grzymisch , I. Harrison , G. Heinzel , M. Hewitson , D. Hollington , D. Hoyland , M. Hueller , H. Inchauspé , O. Jennrich , P. Jetzer , N. Karnesis , B. Kaune , N. Korsakova , C. J. Killow , M. Laurenza , J. A. Lobo , I. Lloro , L. Liu , J. P. López-Zaragoza , R. Maarschalkerweerd , D. Mance , V. Martín , L. Martin-Polo , J. Martino , F. Martin-Porqueras , I. Mateos , P. W. McNamara , J. Mendes , L. Mendes , M. Nofrarias , S. Paczkowski , M. Perreur-Lloyd , A. Petiteau , P. Pivato , E. Plagnol , J. Ramos-Castro , J. Reiche , D. I. Robertson , F. Rivas , G. Russano , F. Sabbatini , J. Slutsky , C. F. Sopuerta , T. Sumner , D. Telloni , D. Texier , J. I. Thorpe , D. Vetrugno , S. Vitale , G. Wanner , H. Ward , P. Wass , W. J. Weber , L. Wissel , A. Wittchen , A. Zambotti , C. Zanoni , P. Zweifel

Recovery of 150-250 MeV Cosmic Ray Proton Intensities Between 2004-2010 as Measured Near the Earth, at Voyager 2 and also in the Heliosheath at Voyager 1 - A Two Zone Heliosphere

The recovery of cosmic ray protons of energy ~150-250 MeV/nuc in solar cycle #23 from 2004 to 2010 has been followed at the Earth using IMP, ACE and balloon data and also at V2 between 74-92 AU and at V1 beyond the heliospheric termination…

Geophysics · Physics 2011-11-11 W. R. Webber , F. B. McDonald , P. R. Higbie , B. Heikkila

On the Accuracy of Underground Muon Intensity Calculations

Cosmic ray muons detected by deep underground and underwater detectors have served as an information source on the high-energy cosmic ray spectrum and hadronic interactions in air showers for almost a century. The theoretical interest in…

High Energy Astrophysical Phenomena · Physics 2022-03-30 Anatoli Fedynitch , William Woodley , Marie-Cecile Piro

Analytic modeling of recurrent Forbush decreases caused by corotating interaction regions

On scales of days, the galactic cosmic ray (GCR) flux is affected by coronal mass ejections and corotating interaction regions (CIRs), causing so-called Forbush decreases and recurrent Forbush decreases (RFDs), respectively. We explain the…

Solar and Stellar Astrophysics · Physics 2022-01-25 Bojan Vrsnak , Mateja Dumbovic , Bernd Heber , Anamarija Kirin

A lower bound on intergalactic magnetic fields from time variability of 1ES 0229+200 from MAGIC and Fermi/LAT observations

Extended and delayed emission around distant TeV sources induced by the effects of propagation of gamma rays through the intergalactic medium can be used for the measurement of the intergalactic magnetic field (IGMF). We search for delayed…

High Energy Astrophysical Phenomena · Physics 2023-02-22 MAGIC Collaboration , V. A. Acciari , I. Agudo , T. Aniello , S. Ansoldi , L. A. Antonelli , A. Arbet Engels , M. Artero , K. Asano , D. Baack , A. Babić , A. Baquero , U. Barres de Almeida , J. A. Barrio , I. Batković , J. Becerra González , W. Bednarek , E. Bernardini , M. Bernardos , A. Berti , J. Besenrieder , W. Bhattacharyya , C. Bigongiari , A. Biland , O. Blanch , H. Bökenkamp , G. Bonnoli , Ž. Bošnjak , I. Burelli , G. Busetto , R. Carosi , G. Ceribella , M. Cerruti , Y. Chai , A. Chilingarian , S. Cikota , E. Colombo , J. L. Contreras , J. Cortina , S. Covino , G. D'Amico , V. D'Elia , P. Da Vela , F. Dazzi , A. De Angelis , B. De Lotto , A. Del Popolo , M. Delfino , J. Delgado , C. Delgado Mendez , D. Depaoli , F. Di Pierro , L. Di Venere , E. Do Souto Espiñeira , D. Dominis Prester , A. Donini , D. Dorner , M. Doro , D. Elsaesser , V. Fallah Ramazani , L. Fariña , A. Fattorini , L. Font , C. Fruck , S. Fukami , Y. Fukazawa , R. J. García López , M. Garczarczyk , S. Gasparyan , M. Gaug , N. Giglietto , F. Giordano , P. Gliwny , N. Godinović , J. G. Green , D. Green , D. Hadasch , A. Hahn , T. Hassan , L. Heckmann , J. Herrera , D. Hrupec , M. Hütten , T. Inada , R. Iotov , K. Ishio , Y. Iwamura , I. Jiménez Martínez , J. Jormanainen , L. Jouvin , D. Kerszberg , Y. Kobayashi , H. Kubo , J. Kushida , A. Lamastra , D. Lelas , F. Leone , E. Lindfors , L. Linhoff , I. Liodakis , S. Lombardi , F. Longo , R. López-Coto , M. López-Moya , A. López-Oramas , S. Loporchio , A. Lorini , B. Machado de Oliveira Fraga , C. Maggio , P. Majumdar , M. Makariev , M. Mallamaci , G. Maneva , M. Manganaro , K. Mannheim , M. Mariotti , M. Martínez , A. Mas Aguilar , D. Mazin , S. Menchiari , S. Mender , S. Mićanović , D. Miceli , T. Miener , J. M. Miranda , R. Mirzoyan , E. Molina , H. A. Mondal , A. Moralejo , D. Morcuende , V. Moreno , E. Moretti , T. Nakamori , C. Nanci , L. Nava , V. Neustroev , M. Nievas Rosillo , C. Nigro , K. Nilsson , K. Nishijima , K. Noda , S. Nozaki , Y. Ohtani , T. Oka , J. Otero-Santos , S. Paiano , M. Palatiello , D. Paneque , R. Paoletti , J. M. Paredes , L. Pavletić , P. Peñil , M. Persic , M. Pihet , P. G. Prada Moroni , E. Prandini , C. Priyadarshi , I. Puljak , W. Rhode , M. Ribó , J. Rico , C. Righi , A. Rugliancich , N. Sahakyan , T. Saito , S. Sakurai , K. Satalecka , F. G. Saturni , B. Schleicher , K. Schmidt , F. Schmuckermaier , J. L. Schubert , T. Schweizer , J. Sitarek , I. Šnidarić , D. Sobczynska , A. Spolon , A. Stamerra , J. Strišković , D. Strom , M. Strzys , Y. Suda , T. Surić , M. Takahashi , R. Takeishi , F. Tavecchio , P. Temnikov , T. Terzić , M. Teshima , L. Tosti , S. Truzzi , A. Tutone , S. Ubach , J. van Scherpenberg , G. Vanzo , M. Vazquez Acosta , S. Ventura , V. Verguilov , I. Viale , C. F. Vigorito , V. Vitale , I. Vovk , M. Will , C. Wunderlich , T. Yamamoto , D. Zarić , A. Neronov , D. Semikoz , A. Korochkin

GRB000301C with peculiar afterglow emission

The CCD magnitudes in Johnson V and Cousins R and I photometric passbands are determined for GRB 000301C afterglow starting ~ 1.5 day after the gamma-ray burst. In fact we provide the earliest optical observations for this burst. Light…

Astrophysics · Physics 2009-09-25 R. Sagar , V. Mohan , S. B. Pandey , A. K. Pandey , C. S. Stalin , A. J. Castro-Tirado

Flux Variations of Cosmic Ray Air Showers Detected by LHAASO-KM2A During a Thunderstorm on 10 June 2021

The Large High Altitude Air Shower Observatory (LHAASO) has three sub-arrays, KM2A, WCDA and WFCTA. The flux variations of cosmic ray air showers were studied by analyzing the KM2A data during the thunderstorm on 10 June 2021. The number of…

High Energy Astrophysical Phenomena · Physics 2022-12-07 LHAASO Collaboration , F. Aharonian , Q. An , Axikegu , L. X. Bai , Y. X. Bai , Y. W. Bao , D. Bastieri , X. J. Bi , Y. J. Bi , J. T. Cai , Zhe Cao , Zhen Cao , J. Chang , J. F. Chang , E. S. Chen , Liang Chen , Liang Chen , Long Chen , M. J. Chen , M. L. Chen , S. H. Chen , S. Z. Chen , T. L. Chen , X. J. Chen , Y. Chen , H. L. Cheng , N. Cheng , Y. D. Cheng , S. W. Cui , X. H. Cui , Y. D. Cui , B. Z. Dai , H. L. Dai , Z. G. Dai , Danzengluobu , D. della Volpe , K. K. Duan , J. H. Fan , Y. Z. Fan , Z. X. Fan , J. Fang , K. Fang , C. F. Feng , L. Feng , S. H. Feng , X. T. Feng , Y. L. Feng , B. Gao , C. D. Gao , L. Q. Gao , Q. Gao , W. Gao , W. K. Gao , M. M. Ge , L. S. Geng , G. H. Gong , Q. B. Gou , M. H. Gu , F. L. Gu , J. G. Guo , X. L. Guo , Y. Q. Guo , Y. Y. Guo , Y. A. Han , H. H. He , H. N. He , S. L. He , X. B. He , Y. He , M. Heller , Y. K. Hor , C. Hou , X. Hou , H. B. Hu , Q. Hu , S. Hu , S. C. Hu , X. J. Hu , D. H. Huang , W. H. Huang , X. T. Huang , X. Y. Huang , Y. Huang , Z. C. Huang , X. L. Ji , H. Y. Jia , K. Jia , K. Jiang , Z. J. Jiang , M. Jin , M. M. Kang , T. Ke , D. Kuleshov , B. B. Li , Cheng Li , Cong Li , F. Li , H. B. Li , H. C. Li , H. Y. Li , J. Li , Jian Li , Jie Li , K. Li , W. L. Li , X. R. Li , Xin Li , Xin Li , Y. Z. Li , Zhe Li , Zhuo Li , E. W. Liang , Y. F. Liang , S. J. Lin , B. Liu , C. Liu , D. Liu , H. Liu , H. D. Liu , J. Liu , J. L. Liu , J. S. Liu , J. Y. Liu , M. Y. Liu , R. Y. Liu , S. M. Liu , W. Liu , Y. Liu , Y. N. Liu , W. J. Long , R. Lu , Q. Luo , H. K. Lv , B. Q. Ma , L. L. Ma , X. H. Ma , J. R. Mao , A. Masood , Z. Min , W. Mitthumsiri , Y. C. Nan , Z. W. Ou , B. Y. Pang , P. Pattarakijwanich , Z. Y. Pei , M. Y. Qi , Y. Q. Qi , B. Q. Qiao , J. J. Qin , D. Ruffolo , A. Sáiz , C. Y. Shao , L. Shao , O. Shchegolev , X. D. Sheng , J. Y. Shi , H. C. Song , Yu. V. Stenkin , V. Stepanov , Y. Su , Q. N. Sun , X. N. Sun , Z. B. Sun , P. H. T. Tam , Z. B. Tang , W. W. Tian , B. D. Wang , C. Wang , H. Wang , H. G. Wang , J. C. Wang , J. S. Wang , L. P. Wang , L. Y. Wang , R. Wang , R. N. Wang , W. Wang , X. G. Wang , X. Y. Wang , Y. Wang , Y. D. Wang , Y. J. Wang , Y. P. Wang , Z. H. Wang. Z. X. Wang , Zhen Wang , Zheng Wang , D. M. Wei , J. J. Wei , Y. J. Wei , T. Wen , C. Y. Wu , H. R. Wu , S. Wu , X. F. Wu , Y. S. W , S. Q. Xi , J. Xia , J. J. Xia , G. M. Xiang , D. X. Xiao , G. Xiao , G. G. Xin , Y. L. Xin , Y. Xing , Z. Xiong , D. L. Xu , R. X. Xu , L. Xue , D. H. Yan , J. Z. Yan , C. W. Yang , F. F. Yang , H. W. Yang , J. Y. Yang , L. L. Yang , M. J. Yang , R. Z. Yang , S. B. Yang , Y. H. Yao , Z. G. Yao , Y. M. Ye , L. Q. Yin , N. Yin , X. H. You , Z. Y. You , Y. H. Yu , Q. Yuan , H. Yue , H. D. Zeng , T. X. Zeng , W. Zeng , Z. K. Zeng , M. Zha , X. X. Zhai , B. B. Zhang , F. Zhang , H. M. Zhang , H. Y. Zhang , J. L. Zhang , L. X. Zhang , Li Zhang , Lu Zhang , P. F. Zhang , P. P. Zhang , R. Zhang , S. B. Zhang , S. R. Zhang , S. S. Zhang , X. Zhang , X. P. Zhang , Y. F. Zhang , Y. L. Zhang , Yi Zhang , Yong Zhang , B. Zhao , J. Zhao , L. Zhao , L. Z. Zhao , S. P. Zhao , F. Zheng , Y. Zheng , B. Zhou , H. Zhou , J. N. Zhou , P. Zhou , R. Zhou , X. X. Zhou , C. G. Zhu , F. R. Zhu , H. Zhu , K. J. Zhu , X. Zuo

Direct Measurement of the Cosmic-Ray Helium Spectrum from 40 GeV to 250 TeV with the Calorimetric Electron Telescope on the International Space Station

We present the results of a direct measurement of the cosmic-ray helium spectrum with the CALET instrument in operation on the International Space Station since 2015. The observation period covered by this analysis spans from October 13,…

High Energy Astrophysical Phenomena · Physics 2023-05-04 O. Adriani , Y. Akaike , K. Asano , Y. Asaoka , E. Berti , G. Bigongiari , W. R. Binns , M. Bongi , P. Brogi , A. Bruno , J. H. Buckley , N. Cannady , G. Castellini , C. Checchia , M. L. Cherry , G. Collazuol , G. A. de Nolfo , K. Ebisawa , A. W. Ficklin , H. Fuke , S. Gonzi , T. G. Guzik , T. Hams , K. Hibino , M. Ichimura , K. Ioka , W. Ishizaki , M. H. Israel , K. Kasahara , J. Kataoka , R. Kataoka , Y. Katayose , C. Kato , N. Kawanaka , Y. Kawakubo , K. Kobayashi , K. Kohri , H. S. Krawczynski , J. F. Krizmanic , P. Maestro , P. S. Marrocchesi , A. M. Messineo , J. W. Mitchell , S. Miyake , A. A. Moiseev , M. Mori , N. Mori , H. M. Motz , K. Munakata , S. Nakahira , J. Nishimura , S. Okuno , J. F. Ormes , S. Ozawa , L. Pacini , P. Papini , B. F. Rauch , S. B. Ricciarini , K. Sakai , T. Sakamoto , M. Sasaki , Y. Shimizu , A. Shiomi , P. Spillantini , F. Stolzi , S. Sugita , A. Sulaj , M. Takita , T. Tamura , T. Terasawa , S. Torii , Y. Tsunesada , Y. Uchihori , E. Vannuccini , J. P. Wefel , K. Yamaoka , S. Yanagita , A. Yoshida , K. Yoshida , W. V. Zober

Measurements of Proton, Helium and Muon Spectra at Small Atmospheric Depths with the BESS Spectrometer

The cosmic-ray proton, helium, and muon spectra at small atmospheric depths of 4.5 -- 28 g/cm^2 were precisely measured during the slow descending period of the BESS-2001 balloon flight. The variation of atmospheric secondary particle…

Astrophysics · Physics 2009-11-07 K. Abe , T. Sanuki , K. Anraku , Y. Asaoka , H. Fuke , S. Haino , N. Ikeda , M. Imori , K. Izumi , T. Maeno , Y. Makida , S. Matsuda , N. Matsui , T. Matsukawa , H. Matsumoto , J. W. Mitchell , A. A. Moiseev , J. Nishimura , M. Nozaki , S. Orito , J. F. Ormes , M. Sasaki , E. S. Seo , Y. Shikaze , T. Sonoda , R. E. Streitmatter , J. Suzuki , K. Tanaka , K. Tanizaki , T. Yamagami , A. Yamamoto , Y. Yamamoto , K. Yamato , T. Yoshida , K. Yoshimura

Disappearance of a narrow Mg II absorption system with a measured velocity up to $\rm 166,000 km s^{-1}$

Quasar J152645.61+193006.7 ($z_{\rm e}=2.5771$) was observed by the Sloan Digital Sky Survey (SDSS) on 2006 May 31, and again on 2011 April 9. The time interval of the SDSS two observations is 497.4 days at the quasar rest frame. From the…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Zhi-Fu Chen , Yi-Ping Qin

New constraints on the origin of medium-energy neutrinos observed by IceCube

The recent IceCube publication claims the observation of cosmic neutrinos with energies down to $\sim 10$ TeV, reinforcing the growing evidence that the neutrino flux in the 10-100 TeV range is unexpectedly large. Any conceivable source of…

High Energy Physics - Phenomenology · Physics 2020-05-20 Antonio Capanema , Arman Esmaili , Kohta Murase

Galactic Cosmic-Ray Anisotropies: Voyager 1 in the Local Interstellar Medium

Since crossing the heliopause on August 25, 2012, Voyager 1 observed reductions in galactic cosmic ray count rates caused by a time-varying depletion of particles with pitch angles near 90-deg, while intensities of particles with other…

Space Physics · Physics 2019-05-30 J. S. Rankin , E. C. Stone , A. C. Cummings , D. J. McComas , N. Lal , B. C. Heikkila