Dr
Martin Will
(Max-Planck-Institut für Physik)
24/09/2018, 09:30
The MAGIC telescopes in La Palma, Canary Islands, measure Cherenkov light emitted by gamma-ray induced air showers in the atmosphere. For the correct and safe operations of the telescopes, but most importantly for the subsequent data analysis, the knowledge of the atmospheric parameters is important. Corrections to the measured data can be applied after analyzing the atmospheric monitoring...
Mr
George Vasileiadis
(LUPM)
24/09/2018, 10:00
The H.E.S.S. experiment in Namibia, Africa, is a high energy gamma ray telescope sensitive in the energy range from 100 Gev to a few tens of TeV, that uses the atmospheric Cherenkov technique to detect showers developed within the atmosphere. To minimize the systematic errors on the derived fluxes and energy dependencies of the measured sources, using a Lidar one can calculate the impact of...
Dr
Sasa Micanovic
(University of Rijeka, Department of Physics, Croatia)
24/09/2018, 10:30
The Northern hemisphere site of the Cherenkov Telescope Array (CTA-N) will be placed at the Observatorio del Roque de Los Muchachos (La Palma, Canary Islands, Spain) at the altitude of 2200m above the sea level. In order to obtain a global understanding of the performance of the telescopes under different atmospheric conditions above the observatory, a preliminary study has been performed....
Dr
Simon Mackovjak
(Department of Space Physics, Institute of Experimental Physics, Slovak Academy of Sciences)
24/09/2018, 11:30
The JEM-EUSO (Joint Experiment Missions for Extreme Universe Space Observatory) program has the ambition to observe Extensive Air Showers (EAS) induced by Ultra High Energy Cosmic Rays (UHECR) from the Space. For this purpose, the study of the night Earth's atmosphere with respect to the EAS detection is obligatory. A such study needs to address the estimation of the future main instrument...
Ms
PRAGATI MITRA
(Vrije Universiteit Brussel)
24/09/2018, 12:00
The LOFAR radio telescope measures the radio emission from extensive air showers with unprecedented precision. Estimating the depth of shower
maximum Xmax with higher precision is of great interest for the study of primary particle composition. One of the major systematic uncertainties in reconstructing X_max is due to limited knowledge of the refractive index of air and its dependence on...
Dr
Pere Munar-Adrover
(INAF-IAPS)
24/09/2018, 12:30
Cherenkov Telescope Array (CTA) will bring a whole new insight to the gamma-ray Universe. In order to fulfill its performance requirements we need to understand and correct the atmospheric effects that influence the acquired instrument data. For this reason we have studied atmospheric molecular profiles above both CTA sites, La Palma and Cerro Armazones, using publicly available historical...
Prof.
Tareq AbuZayyad
(University of Utah)
24/09/2018, 14:30
Located in the western desert of the state of Utah, the Telescope Array (TA) experiment measures the properties of ultra high energy cosmic ray (UHECR) induced extensive air showers. TA employs a hybrid detector comprised of a large surface array of scintillator detectors overlooked by three fluorescence telescopes stations. The TA Low Energy extension (TALE) detector has operated as a...
Prof.
Bruce Dawson
(University of Adelaide)
24/09/2018, 15:00
The Pierre Auger Observatory's Fluorescence Detector (FD) consists of 27 optical telescopes arranged in four sites around the perimeter of the 3000 square kilometre Surface Detector (SD). Cosmic ray extensive air showers are viewed via the nitrogen fluorescence light they induce in the atmosphere. Careful treatment of light attenuation processes must be made, especially given that some...
Dr
Bianca Keilhauer
(Karlsruhe Institute of Technology KIT)
25/09/2018, 10:00
The Pierre Auger Observatory for detecting ultra-high energy cosmic rays has been founded in 1999. After a main planning and construction phase of about five years, the regular data taking started in 2004, but it took another four years until the full surface detector array was deployed. In parallel to the main detectors of the Observatory, a comprehensive set of instruments for monitoring the...
Dr
Dusan Mandat
(Institute of Physics Academy of Sciences of the Czech Republic)
25/09/2018, 10:30
The Fluorescence detector Array of Single-pixel Telescopes (FAST) is a proposed low-cost, large-area, next-generation experiment for the detection of ultrahigh-energy cosmic rays (UHECRs) via the atmospheric fluorescence technique. Two FAST telescopes are installed and operating at the Black Rock Mesa site of the Telescope Array Experiment in Utah, USA. Knowledge of the properties of the...
Dr
Markus Gaug
(Universitat Autònoma de Barcelona and IEEC-CERES)
25/09/2018, 12:30
The IFAE/UAB Raman LIDAR project aims to develop a Raman LIDAR suitable for the online atmospheric calibration along the line-of-sight of the Northern array of the CTA.
Requirements for such a solution include the ability to characterize aerosol extinction to distances of 30 m with an accuracy better than 5%, within time scales of less than 1 minute.
The Raman LIDAR consists therefore of a...
Dr
Alessia Sannino
(CNISM - Università FedericoII di Napoli)
25/09/2018, 13:00
A lidar for aerosol monitoring with conventional optical design can provide good quality signals from several hundred meters up to tens of kilometres above the ground, but the aerosol load is mainly contained (up to 80%) in the planetary boundary layer that can have a height of the order of hundreds of meters. Therefore, the measurement of the complete aerosol extinction profile is generally a...
Dr
Simon Mackovjak
(Department of Space Physics, Institute of Experimental Physics, Slovak Academy of Sciences)
25/09/2018, 15:00
The night time UV radiation composed of airglow, starlight, and zodiacal light act as a background for detection of the Extensive Air Shower (EAS) fluorescence induced by Ultra-High Energy Cosmic Rays (UHECR). To monitor this background, we have developed the one-pixel instrument that provides the absolute intensities within the spectral range 300 - 480 nm in the one second temporal...
Dr
Jan Ebr
(Institue of Physics, Prague)
25/09/2018, 15:30
The idea of using stellar photometry for atmospheric monitoring for optical experiments in high-energy astrophysics is seemingly straightforward, but reaching high precision of the order of 0.01 in the determination of the vertical aerosol optical depth (VAOD) has proven consistently difficult. Wide-field photometry in a large span of altitudes allows fast determination of VAOD independently...
Dr
Petr Janecek
(Institute of Physics AS CR)
25/09/2018, 16:00
A FRAM telescope is a system consisting of a robotic mount, a large-format CCD camera and a fast telephoto lens that can be used for atmospheric monitoring at any site whenever information about the atmospheric transparency is required with high spatial or temporal resolution and where continuous use of laser-based methods for this purpose would interfere with other bservations. The original...
28.
Development of a High Spectral Resolution Lidar for day-time measurements of aerosol extinction.
Dr
Alessia Sannino
(CNISM - Università FedericoII di Napoli)
25/09/2018, 17:00
Lidar technique is the most performing way to obtain the atmosphere vertical profile of aerosol optical properties with high space-time resolution. With conventional lidars, the retrieval of aerosol optical properties (as the extinction profile) is realizable only with assumptions on aerosol extinction-to-backscatter ratio or with Raman measurement achievable in night-time.
In order to...
Mr
Stanislav Stefanik
(Charles University, Prague)
25/09/2018, 17:30
The Cherenkov Telescope Array (CTA), the future ground-based gamma-ray observatory, will require reliable monitoring of the atmosphere which is an inherent part of the detector. We discuss here the implementation of the extended method of the Cherenkov Transparency Coefficient for the atmospheric calibration for the CTA. The method estimates the atmospheric transmission of Cherenkov light,...
Dr
Nataliia Borodai
(Institute of Nuclear Physics PAN, Krakow)
25/09/2018, 18:00
Aerosol optical depth can be retrieved from measurements performed by Moderate Resolution Imaging Spectroradiometer (MODIS) satellite instrument. The MODIS satellite system includes two polar satellites, Terra and Aqua. Each of them flies over the Pierre Auger Observatory once a day, providing two measurements of aerosols per day and covering the whole area of the Observatory. MODIS aerosol...
Prof.
Ashot Chilingaryan
(Yerevan Physics Institute)
26/09/2018, 09:30
The problem of thundercloud electrification is of the most difficult ones in the atmospheric physics. The structure of electric fields in the cloud escapes from the detailed in situ measurements; few balloon flights revealed rather complicated structure that is much more sophisticated than a simple dipole or tripole models. To get insight into the problem of charge structure of thundercloud we...
Prof.
Rasha Abbasi
(University of Utah)
26/09/2018, 10:00
Terrestrial gamma-ray flashes (TGFs) are bursts of gamma-rays initiated in the Earth's atmosphere. TGFs were serendipitously first observed over twenty years ago by the BATSE gamma ray satellite experiment. Since then, several satellite experiments have shown that TGFs are produced in the upward negative breakdown stage at the start of intracloud lightning discharges. In this talk, we present...
Dr
Brian Hare
(University of Groningen)
26/09/2018, 12:00
LOFAR (LOw Frequency ARray) is a radio telescope that consists of a large number of dual-polarized antennas spread over the northern Netherlands and beyond. The LOFAR for Lightning Imaging project (LOFAR-LIM) has successfully used LOFAR to map out lightning in the Netherlands. Since LOFAR covers a large frequency range (10-90 MHz), has antennas spread over a large area, and saves the raw trace...
Dr
Arsen Ghalumyan
(A. Alikhanian National Laboratory (Yerevan Physics Institute), Armenia, 0036, Alikhanian Br. Str. 2)
26/09/2018, 12:30
The upcoming Cherenkov Telescope Array (CTA) project is expected to
provide unprecedented sensitivity in the low-energy (<~100 GeV) range
for Cherenkov telescopes. In order to fully exploit the potential of
the telescope systems it is meaningful to look for ways to further
improve the available analysis methods and include possible biasness
of the Cherenkov images due to the...
