1. Measurements of Xmax above 10[sup]17 eV with the fluorescence detector of the Pierre Auger Observatorymarko zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Alessio Porcelli, 2015, published scientific conference contribution Abstract: For the first time the Pierre Auger Collaboration
presents〈Xmax〉and σ(Xmax) measurements covering nearly three decades of energy. In this analysis we include
new Xmax data obtained with the High Elevation Auger
Telescopes (HEAT) enhancement. The HEAT telescopes cover
a field of view ranging from 30◦ to 60◦ of elevation and are
located next to one of the standard fluorescence detector sites
(Coihueco). The combination of the HEAT and Coihueco telescopes
covers a field of view from ∼2◦ up to ∼60◦ of elevation. Thus,
the combination can sample the longitudinal profile of nearby
lower energy showers, allowing us to extend the energy range
down to 10[sup]17 eV.
Found in: ključnih besedah
Summary of found: ...extensive atmospheric showers,
longitudinal shower profile,
depth of the shower maximum,
Pierre...
Keywords: extensive atmospheric showers, longitudinal shower profile, depth of the shower maximum, Pierre Auger Observatory
Published: 03.03.2016; Views: 4459; Downloads: 226
 Fulltext (718,30 KB) |
2. Lightning Detection at the Pierre Auger Observatorymarko zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Julian Rautenberg, 2015, published scientific conference contribution Abstract: The Auger Engineering Radio Array, an extension of the Pierre
Auger Observatory with antennas in the MHz range, requires to
monitor the atmospheric conditions, which have a large influence
on the radio emission of air showers. In particular, amplified
signals up to an order of magnitude have been detected as an
affect of thunderstorms. For a more detailed investigation and
more generally, for detecting thunderstorms, a new lightning
detection system has been installed at the Pierre Auger
Observatory in Argentina. In addition, an electric-field mill
measures the field strength on ground level at the antenna
array. With these measurements, data periods affected
by thunderstorms can be identified. Additionally, a lightning
trigger for the water-Cherenkov detectors was developed to read
out individual stations when a lightning was detected nearby.
With these data, a possible correlation between the formation
of lightning and cosmic rays can be investigated even at low
energies of about 10[sup]15 eV. The structure and functionality
of the lightning detection are described and first data
analyses are shown.
Found in: ključnih besedah
Summary of found: ...the MHz range, requires to
monitor the atmospheric conditions, which have a large influence
on the...
Keywords: Pierre Auger Observatory, Auger Engineering Radio Array, atmospheric monitoring, lightning detectors
Published: 03.03.2016; Views: 3610; Downloads: 189
Fulltext (1,10 MB) |
3. Studies in the atmospheric monitoring at the Pierre Auger Observatory using the upgraded Central Laser Facilitymarko zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Carlos Medina-Hernandez, 2015, published scientific conference contribution Abstract: The Fluorescence Detector (FD) at the Pierre Auger Observatory
measures the intensity of the scattered light from laser tracks
generated by the Central Laser Facility (CLF) and the eXtreme
Laser Facility (XLF) to monitor and estimate the vertical
aerosol optical depth (τ(z,t)). This measurement is needed to
obtain unbiased and reliable FD measurements of the arrival
direction and energy of the primary cosmic ray, and the depth
of the maximum shower development. The CLF was upgraded
substantially in 2013 with the addition of a solid state laser,
new generation GPS, a robotic beam calibration system, better
thermal and dust isolation, and improved software. The upgrade
also included a back-scatter Raman LIDAR to measure τ(z,t).
The new features and applications of the upgraded instrument
are described. These include the laser energy calibration
and the atmospheric monitoring measurements. The first τ(z,t)
results and comparisons after the upgrade are presented using different methods. The first method compares the FD hourly
response to the scattered light from the CLF (or XLF) against
a reference hourly profile measured during a clear night where
zero aerosol contents are assumed. The second method simulates
FD responses with different atmospheric parameters and selects the parameters that provide the best fit to the actual FD
response. A third method uses the new Raman LIDAR receiver
in-situ to measure the back-scatter light from the CLF laser.
The results show a good data agreement for the first and second
methods using FD stations located at the same distance from the
facilities. Preliminary results of τ(z,t) using the Raman LIDAR
are presented as well.
Found in: ključnih besedah
Keywords: Pierre Auger Observatory, extensive air showers, the Fluorescence Detector, atmospheric monitoring, vertical aerosol optical depth, the Central Laser Facility, the eXtreme Laser Facility
Published: 03.03.2016; Views: 3952; Downloads: 174
Fulltext (3,96 MB) |
4. Report of the Working Group on the Composition of Ultra-High Energy Cosmic Raysmarko zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, Michael Unger, 2015, published scientific conference contribution Abstract: The atmospheric depth, Xmax, at which the particle number of
an air shower reaches its maximum is a good indicator for the
mass of the primary particle. We present a comparison of the
energy evolution of the mean of Xmax as measured by the
Telescope Array and c Collaborations. After
accounting for the different resolutions, acceptances and
analysis strategies of the two experiments, the two results are
found to be in good agreement within systematic uncertainties.
Found in: ključnih besedah
Summary of found: ...The atmospheric depth, Xmax, at which the particle number...
Keywords: Pierre Auger Observatory, Telescope Array, Ultra-High Energy Cosmic Rays, elemental composition, extensive air showers, the atmospheric depth of the air shower maximum
Published: 08.03.2016; Views: 3736; Downloads: 227
Fulltext (329,86 KB) |
5. Calibration of the Cherenkov Telescope ArrayMarko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, Markus Gaug, 2015, published scientific conference contribution Found in: ključnih besedah
Summary of found: ...Telescope Array (CTA),
calibration of cameras of CTA telescopes,
atmospheric calibration...
Keywords: Cherenkov Telescope Array (CTA), calibration of cameras of CTA telescopes, atmospheric calibration
Published: 24.01.2017; Views: 2977; Downloads: 224
Fulltext (184,17 KB) |
6. Real-time atmospheric monitoring for the Cherenkov Telescope Array using a wide-field optical telescopeMarko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, Jan Ebr, 2015, published scientific conference contribution Found in: ključnih besedah
Keywords: Cherenkov Telescope Array, atmospheric monitoring, wide-field optical telescope
Published: 15.02.2017; Views: 3190; Downloads: 173
Fulltext (5,49 MB) |
7. The ARCADE Raman Lidar System for the Cherenkov Telescope ArrayMarko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Andrej Filipčič, Laura Valore, 2015, published scientific conference contribution Found in: ključnih besedah
Summary of found: ...Cherenkov Telescope Array,
atmospheric monitoring,
ARCADE Raman Lidar...
Keywords: Cherenkov Telescope Array, atmospheric monitoring, ARCADE Raman Lidar
Published: 16.02.2017; Views: 2872; Downloads: 176
Fulltext (1,24 MB) |
8. Impact of atmospheric effects on the energy reconstruction of air showers observed by the surface detectors of the Pierre Auger ObservatoryMarko Zavrtanik, Danilo Zavrtanik, Lili Yang, Serguei Vorobiov, Darko Veberič, Marta Trini, Samo Stanič, Ahmed Saleh, Gašper Kukec Mezek, Andrej Filipčič, A. Aab, 2017, original scientific article Found in: ključnih besedah
Keywords: Pierre Auger Observatory (PAO), PAO Surface Detector, energy reconstruction, atmospheric effects
Published: 16.02.2017; Views: 3609; Downloads: 0
Fulltext (4,52 MB) |
9. Atmospheric monitoring and array calibration in CTA using the Cherenkov Transparency CoefficientMarko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Christopher Eckner, Stanislav Stefanik, 2017, published scientific conference contribution Found in: ključnih besedah
Keywords: Cherenkov Transparency Coefficient, CTA, Atmospheric monitoring
Published: 16.02.2018; Views: 2234; Downloads: 148
Fulltext (1,65 MB) |
10. Atmospheric calibration of the Cherenkov Telescope ArrayMarko Zavrtanik, Danilo Zavrtanik, Gabrijela Zaharijas, Lili Yang, Serguei Vorobiov, Samo Stanič, Gašper Kukec Mezek, Christopher Eckner, Jan Ebr, 2017, published scientific conference contribution Found in: ključnih besedah
Keywords: atmospheric calibration, Cherenkov Telescope Array, Cherenkov Transparency Coefficient
Published: 16.02.2018; Views: 2431; Downloads: 118
Fulltext (262,60 KB) |
