A5010749167- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Gamma-ray bursts and supernovae
- Ionosphere and magnetosphere dynamics
- Pulsars and Gravitational Waves Research
- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Geomagnetism and Paleomagnetism Studies
- Particle Detector Development and Performance
- Astro and Planetary Science
- Earthquake Detection and Analysis
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
Rikkyo University
2009-2018
Universidade Federal Fluminense
2013
Waseda University
2008
On 2017 September 10 Neutron Monitors (NMs) apparatus located at ground level and high latitudes detected an increase in the counting rate associated to solar energetic particles (SEPs) emission from X8.2-class flare its CME. This was second-highest of current cycle. The origin active region AR 12673 when it edge west disk, magnetically poorly connected with Earth. However, there a peculiar condition: protons accelerated by CME shocks were injected within heliospheric sheet (HCS) Earth...
An unusual Centauro phenomenon in which cosmic rays enter the atmosphere producing tens of charged hadrons, but virtually no neutral pions, has been a mystery for more than 30 years. Since discovery I 1972 by Brazil-Japan Collaboration operating x-ray emulsion chambers at 5200 m on Mt. Chacaltaya Bolivian Andes, variety models have proposed (including new types interaction or creation matter). Here we show that solution to long-standing scientific puzzle lies with details detector. The...
We present results of a search for possible signal from small scale solar transient events (such as flares and interplanetary shocks) well counterparts to gamma-ray burst (GRB) observed simultaneously by the Tupi muon telescope (Niteroi, Brazil, $22.9\ifmmode^\circ\else\textdegree\fi{}\text{ }\text{ }\mathrm{S}$, $43.2\ifmmode^\circ\else\textdegree\fi{}\text{ }\mathrm{W}$, 3 m above sea level) Pierre Auger Observatory surface detectors (Malargue, Argentina,...
We search for a consistent view on the RUNJOB experiment and present an alternative analysis based explicitly reported published numerical data. Here we show that there is more than one interpretation to observational It demonstrated that, contrary wide-spread opinion, data are not inconsistent with increase of average mass near knee region cosmic ray spectrum. Considering very low statistics systematic uncertainties, especially in high energy region, suggest peculiarities methodical origin...
In this paper we examine the possibility of ground observation gigaelectronvolt counterparts associated with Monitor All-sky X-ray Image transient event (trigger 58072727) and Swift GRB140512A event. both cases, there was a muon excess statistical significance above 4σ. The coordinates events were located in field view (FOV) Tupi telescopes at time occurrence. Since 2013 August, experiment has been operating new extended array five telescopes, level (, 3 m sea level). This location coincides...
On May 17, 2012 an M5.1-class flare exploded from the sun. An O-type coronal mass ejection (CME) was also associated with this flare. There instant increase in proton flux peak at $\geq 100$ MeV, leading to S2 solar radiation storm level. In about 20 minutes after X-ray emission, particles reached Earth.It source of first (since December 2006) ground level enhancement (GLE) current cycle 24. The GLE detected by neutron monitors (NM) and other based detectors. Here we present observation Tupi...
On April 24, 2012, at 16:47:14 UT, the Gas Slit Camera (GSC) of Japanese Monitor All-sky X-ray Image (MAXI) instrument on International Space Station detected a short x-ray transient lasting about 34 seconds. The MAXI/GSC was most likely gamma-ray burst (GRB), because high Galactic latitude, spectral hardness ratio, and absence known bright sources position. In addition, GRB 120424A coordinates were in field view inclined Tupi muon telescope located ground level (3 m above sea level)...
A Comment on the article by Anchordoqui et al. ``Hunting long-lived gluinos at Pierre Auger Observatory'' [L. A. Anchordoqui, Delgado, C. Garc\'{\i}a Canal, and S. J. Sciutto, Phys. Rev. D 77, 023009 (2008)].
From June 2014 to February 2017, the Fermi LAT detected 46 gamma-ray bursts (GRBs) with photon energies above 20 MeV, and trigger coordinates of seven them were within FoV New-Tupi detector located in central region South Atlantic Anomaly (SAA).We show this paper that two these GRBs have a probable GeV counterpart observed at ground level by detector. The first is GRB 160609A, short duration bright emission photons over broad energy range extending up energies. second 160625B, very long GRB,...