scholarly journals Wide and Fast: Monitoring the Sky in Subsecond Domain with the FAVOR and TORTORA Cameras

2010 ◽  
Vol 2010 ◽  
pp. 1-8 ◽  
Author(s):  
Sergey Karpov ◽  
Grigory Beskin ◽  
Sergey Bondar ◽  
Adriano Guarnieri ◽  
Corrado Bartolini ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Time Data ◽  
Basic Principles ◽  
Astrophysical Objects ◽  
Flare Stars ◽  
Real Time Data Processing ◽  
X Ray Binaries ◽  
Near Earth Objects

In order to detect and investigate short stochastic optical flares from a number of variable astrophysical objects (GRBs, SNe, flare stars, CVs, X-Ray binaries) of unknown localizations as well as near-earth objects (NEOs), both natural and artificial, it is necessary to perform the systematic monitoring of large regions of the sky with high temporal resolution. Here we discuss the criteria for a system that is able to perform such a task and describe two cameras we created for wide-field monitoring with high temporal resolution—FAVOR and TORTORA. Also, we describe basic principles of real-time data processing for the high frame rates needed to achieve subsecond temporal resolution on a typical hardware.

Wide-field optical monitoring with Mini-MegaTORTORA (MMT-9) multichannel high temporal resolution telescope

2017 ◽  
Vol 72 (1) ◽  
pp. 81-92 ◽  
Author(s):  
G. M. Beskin ◽  
S. V. Karpov ◽  
A. V. Biryukov ◽  
S. F. Bondar ◽  
E. A. Ivanov ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Optical Monitoring

scholarly journals Status and perspectives of Mini-MegaTORTORA wide-field monitoring system with high temporal resolution

2013 ◽  
Vol 61 ◽  
pp. 465-469 ◽  
Author(s):  
S. Karpov ◽  
G. Beskin ◽  
S. Bondar ◽  
A. Perkov ◽  
E. Ivanov ◽  
...  
Keyword(s):  
Monitoring System ◽  
Temporal Resolution ◽  
Field Monitoring ◽  
High Temporal Resolution ◽  
Wide Field

scholarly journals Ultrasound functional neuroimaging reveals propagation of task-related brain activity in behaving primates

2018 ◽  
Author(s):  
Alexandre Dizeux ◽  
Marc Gesnik ◽  
Harry Ahnine ◽  
Kevin Blaize ◽  
Fabrice Arcizet ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
Large Scale ◽  
Functional Neuroimaging ◽  
Anterior Cingulate ◽  
Global Network ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Spatiotemporal Resolution ◽  
Macro Scale ◽  
The Brain

ABSTRACTIn recent decades, neuroimaging has played an invaluable role in improving the fundamental understanding of the brain. At the macro scale, neuroimaging modalities such as MRI, EEG, and MEG, exploit a wide field of view to explore the brain as a global network of interacting regions. However, this comes at the price of either limited spatiotemporal resolution or limited sensitivity. At the micro scale, electrophysiology is used to explore the dynamic aspects of neuronal activity with a very high temporal resolution. However, this modality requires a statistical averaging of several tens of single task responses. A large-scale neuroimaging modality of sufficient spatial and temporal resolution and sensitivity to study brain region activation dynamically would open new territories of possibility in neuroscienceWe show that neurofunctional ultrasound imaging (fUS) is both able to assess brain activation during single cognitive tasks within superficial and deeper areas of the frontal cortex areas, and image the directional propagation of information within and between these regions. Equipped with an fUS device, two macaque rhesus monkeys were instructed before a stimulus appeared to rest (fixation) or to look towards (saccade) or away (antisaccade) from a stimulus. Our results identified an abrupt transient change in activity for all acquisitions in the supplementary eye field (SEF) when the animals were required to change a rule regarding the task cued by a stimulus. Simultaneous imaging in the anterior cingulate cortex and SEF revealed a time delay in the directional functional connectivity of 0.27 ± 0.07 s and 0.9 ± 0.2 s for animals S and Y, respectively. These results provide initial evidence that recording cerebral hemodynamics over large brain areas at a high spatiotemporal resolution and sensitivity with neurofunctional ultrasound can reveal instantaneous monitoring of endogenous brain signals and behavior.

Multi-objective transforming telescope for wide-field optical monitoring of the sky with high-temporal resolution

2010 ◽  
Author(s):  
Grigory Beskin ◽  
Sergey Bondar ◽  
Sergey Karpov ◽  
Vladimir Plokhotnichenko ◽  
Adriano Guarnieri ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Optical Monitoring ◽  
Multi Objective

scholarly journals Optical camera with high temporal resolution to search for transients in the wide field

2004 ◽  
Vol 325 (6-8) ◽  
pp. 675-675 ◽  
Author(s):  
I. Zolotukhin ◽  
G. Beskin ◽  
A. Biryukov ◽  
S. Bondar ◽  
K. Hurley ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Wide Field

scholarly journals Status and Perspectives of the Mini-MegaTORTORA Wide-field Monitoring System with High Temporal Resolution

10.14311/1710 ◽  
2013 ◽  
Vol 53 (1) ◽  
Author(s):  
Sergey Karpov ◽  
Grigory Beskin ◽  
Sergey Bondar ◽  
Alexey Perkov ◽  
Evgeny Ivanov ◽  
...  
Keyword(s):  
Monitoring System ◽  
Temporal Resolution ◽  
Field Monitoring ◽  
Status Report ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Optical Components

Here we briefly summarize our long-term experience of constructing and operating wide-field monitoring cameras with sub-second temporal resolution to look for optical components of GRBs, fast-moving satellites and meteors. The general hardware requirements for these systems are discussed, along with algorithms for real-time detection and classification of various kinds of short optical transients. We also give a status report on the next generation, the MegaTORTORA multi-objective and transforming monitoring system, whose 6-channel (Mini-MegaTORTORA-Spain) and 9-channel prototypes (Mini-MegaTORTORA-Kazan) we have been building at SAO RAS. This system combines a wide field of view with subsecond temporal resolution in monitoring regime, and is able, within fractions of a second, to reconfigure itself to follow-up mode, which has better sensitivity and simultaneously provides multi-color and polarimetric information on detected transients.

Monitoring with high temporal resolution to search for optical transients in the wide field

2008 ◽  
Author(s):  
Grigory Beskin ◽  
Sergey Bondar ◽  
Evgeny Ivanov ◽  
Sergey Karpov ◽  
Elena Katkova ◽  
...  
Keyword(s):  
Temporal Resolution ◽  
High Temporal Resolution ◽  
Wide Field ◽  
Optical Transients
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