Institute for Precise Instrumentation

Russia

Institute for Precise Instrumentation

Russia
SEARCH FILTERS
Time filter
Source Type

Beskin G.,Russian Academy of Sciences | Karpov S.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | Guarnieri A.,University of Bologna | And 3 more authors.
Astrophysical Bulletin | Year: 2010

The results of observations of the optical emission that accompanied the gamma-ray burst GRB 080319B are reported. Observations were made using the TORTORA fast wide-field camera mounted on the REM robotic telescope in Chile. The behavior of the light curve before, during, and after the gamma-ray burst is described. The light curve consists of four, possibly periodic, 5-7 s long peaks 8-9 s apart. The behavior of the burst in the gamma and optical energy ranges are compared and the results of the theoretical interpretation of this comparison are reported. © 2010 Pleiades Publishing, Ltd.


Beskin G.,Special Astrophysical Observatory | Bondar S.,Institute for Precise Instrumentation | Karpov S.,Special Astrophysical Observatory | Plokhotnichenko V.,Special Astrophysical Observatory | And 3 more authors.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2010

We present the design of a MegaTORTORA telescope (and its prototype, mini-MegaTORTORA, presently in construction at Special Astrophysical Observatory) - modular, multi-purpose, scalable grid of optical cameras based on commercially available objectives and fast CCDs, able to operate with sub-second temporal resolution in both wide-field monitoring regime with all objectives observing different regions of the sky as well as in narrow-field follow-up mode with co-aligned channels and installed color and polarimetric filters for detailed investigation of selected objects, and to change the regime of operation on a sub-second time scale. © 2010 SPIE.


Karpov S.,Russian Academy of Sciences | Beskin G.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | Perkov A.,Institute for Precise Instrumentation | And 6 more authors.
EAS Publications Series | Year: 2013

Here we briefly summarize our long period 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. General requirements for hardware for such systems are discussed along with algorithms of real-time detection and classification of various kinds of short optical transients. We also give a status report on the next generation, multi-objective and transforming monitoring system, the MegaTORTORA, whose 6-channel (Mini-MegaTORTORA-Spain) and 9-channel prototypes (Mini-MegaTORTORA-Kazan) we are building now at SAO RAS. This system combines a wide field of view with subsecond temporal resolution in monitoring regime, and is able to reconfigure itself, in a fractions of second, to follow-up mode which has better sensitivity and provides us with multi-color and polarimetric information on detected transients simultaneously. © EAS, EDP Sciences 2013.


Beskin G.,Special Astropysical Observatory | Karpov S.,Special Astropysical Observatory | Bondar S.,Institute for Precise Instrumentation | Guarnieri A.,University of Bologna | And 3 more authors.
AIP Conference Proceedings | Year: 2010

Naked-Eye Burst is the only event to date observed in optical and gamma-ray ranges simultaneously with sufficiently high temporal resolution. This opens unprecedented possibilities for testing various models of both emission generation and the central engine behaviour during the burst. The temporal properties of the observed light curve, along with tight optical to gamma relation, suggest the intrinsic periodicity of internal engine, which is supposedly a newborn stellar-mass black hole surrounded by an unstable precessing massive accretion disk. © 2010 American Institute of Physics.


Beskin G.,Special Astropysical Observatory | Bondar S.,Institute for Precise Instrumentation | Karpov S.,Special Astropysical Observatory | Guarnieri A.,University of Bologna | And 3 more authors.
AIP Conference Proceedings | Year: 2010

We discuss the strategy of search for fast optical transients accompanying gamma-ray bursts by means of continuous monitoring of wide sky fields with high temporal resolution. We describe the design, performance and results of our cameras, FAVOR and TORTORA. Also we discuss the perspectives of this strategy and possible design of next-generation equipment for wide-field monitoring which will be able to detect optical transients and to study their color and polarization properties with high time resolution. © 2010 American Institute of Physics.


Greco G.,University of Bologna | Beskin G.,Russian Academy of Sciences | Karpov S.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | And 3 more authors.
Advances in Astronomy | Year: 2010

We present the photometric analysis of the extended sky fields observed by the TORTORA optical monitoring system. The technology involved in the TORTORA camera is based on the use of a fast TV-CCD matrix with an image intensifier. This approach can both significantly reduce the readout noise and shorten the focal length following to monitor relatively large sky regions with high temporal resolution and adequate detection limit. The performance of the system has been tested using the relative magnitudes of standard stars by means of long image sequences collected at different airmasses and at various intensities of the moon illumination. As expected from the previous laboratory measurements, artifact sources are negligible and do not affect the photometric results. The following analysis is based on a large sample of images acquired by the TORTORA instrument since July 2006. Copyright © 2010 G. Greco et al.


Karpov S.,Russian Academy of Sciences | Beskin G.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | Guarnieri A.,University of Bologna | And 3 more authors.
Advances in Astronomy | Year: 2010

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. Copyright © 2010 Sergey Karpov et al.


Beskin G.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | Karpov S.,Russian Academy of Sciences | Plokhotnichenko V.,Russian Academy of Sciences | And 5 more authors.
Advances in Astronomy | Year: 2010

To study short stochastic optical flares of different objects (GRBs, SNs, etc.) of unknown localizations as well as NEOs it is necessary to monitor large regions of sky with high-time resolution. We developed a system consisting of widefield camera with field of view of 400600 sq.deg. which uses TV-CCD with 0.13s temporal resolution to record and classify optical transients, and a fast robotic telescope aimed to perform their spectroscopic and photometric investigation just after detection. Such two-telescope complex, combining wide-field camera TORTORA and robotic telescope REM, operated from May 2006 at La Silla ESO observatory. Some results of its operation, including first high time resolution study of optical transient accompanying GRB and discovery of its fine time structure, are presented. Also, prospects for improving the efficiency of such observations are given, and a project of a next generation wide field monitoring system, the MegaTORTORA, is described. Copyright © 2010 Grigory Beskin et al.


Beskin G.,Special Astrophysical Observatory | Karpov S.,Special Astrophysical Observatory | Bondar S.,Institute for Precise Instrumentation | Greco G.,National institute for astrophysics | And 3 more authors.
Astrophysical Journal Letters | Year: 2010

We imaged the position of the naked-eye burst, GRB080319B, before, during, and after its gamma-ray activity with sub-second temporal resolution using the TORTORA wide-field camera. The burst optical prompt emission, which reached 5.3 mag, has been detected, and its periodic optical variability has been discovered in the form of four equidistant flashes with a duration of several seconds. We also detected a strong correlation (r ≈ 0.82) between optical and gamma-ray light curves with a 2 s delay of the optical emission with respect to the gamma-ray emission. The revealed temporal structure of the optical light curve in comparison with the gamma-ray light curve can be interpreted in the framework of themodel of shell collisions in the ejecta containing a significant neutron component. All observed emission features reflect the non-stationary behavior of the burst internal engine - supposedly, a hyperaccreting solar-mass black hole formed in the collapse of a massive stellar core. © 2010. The American Astronomical Society. All rights reserved.


Karpov S.,Russian Academy of Sciences | Beskin G.,Russian Academy of Sciences | Bondar S.,Institute for Precise Instrumentation | Perkov A.,Institute for Precise Instrumentation | And 6 more authors.
Acta Polytechnica | Year: 2013

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. © Czech Technical University in Prague, 2013.

Loading Institute for Precise Instrumentation collaborators
Loading Institute for Precise Instrumentation collaborators