ǂThe ǂCherenkov transparency coefficient for the atmospheric monitoring and array calibration at the Cherenkov Telescope Array South
Abstract
Reconstruction of energies of very-high-energy γ–rays observed by imaging atmospheric Cherenkov telescopes is affected by changes in the atmospheric conditions and the performance of telescope components. Reliable calibration schemes aimed at these effects are necessary for the forthcoming Cherenkov Telescope Array (CTA) to achieve its goals on the maximally allowed systematic uncertainty of the global energy scale. A possible means of estimating the atmospheric attenuation of Cherenkov light is the method of the Cherenkov transparency coefficient (CTC). The CTC is calculated using the telescope detection rates, dominated by the steady cosmic ray background, while properly correcting for the hardware and observational conditions.
The coefficient can also be used to relatively calibrate the optical throughput of telescopes on the assumption of homogeneous atmospheric transparency above the array. Using Monte Carlo simulations, we investigate here the potential of the CTC method for the atmospheric monitoring and telescope cross-calibration at the CTA array in the southern hemisphere. We focus on the feasibility of the method for the array of telescopes of three sizes in different observation configurations and under various levels of atmospheric attenuation.
Keywords
very-high-energy gamma-ray astronomy;Cherenkov Telescope Array (CTA) Observatory;imaging atmospheric Cherenkov telescopes (IACTs);atmospheric monitoring;IACT calibration;
Data
| Language: | English |
|---|---|
| Year of publishing: | 2019 |
| Typology: | 1.08 - Published Scientific Conference Contribution |
| Organization: | UNG - University of Nova Gorica |
| UDC: | 539.1 |
| COBISS: |
215045635
|
| ISSN: | 1824-8039 |
| Views: | 194 |
| Downloads: | 4 |
| Average score: | 0 (0 votes) |
| Metadata: |
|
Other data
| Pages: | 8 str. |
|---|---|
| Chronology: | 2019 |
| DOI: | 10.22323/1.358.0800 |
| ID: | 25394225 |
Recommended works:
ǂThe ǂCherenkov transparency coefficient for the atmospheric monitoring and array calibration at the Cherenkov Telescope Array South
2019,
no subtitle data available
Status and performance results from NectarCAM
2019,
ǂa ǂcamera for CTA medium sized telescopes
Using muon rings for the optical throughput calibration of the Cherenkov Telescope Array
2019,
no subtitle data available
Cherenkov Telescope Array Science
2019,
ǂa ǂmulti-wavelength and multi-messenger perspective
POSyTIVE
2019,
ǂa ǂGRB population study for the Cherenkov Telescope Array