R. Inasaridze - Academia.edu (original) (raw)

Papers by R. Inasaridze

In frame of an implementation of the cooperative program studying of asteroids between the Kharad... more In frame of an implementation of the cooperative program studying of asteroids between the Kharadze Abastumani Astrophysical Observatory and the Astronomical Institute of V.N. Karazin Kharkiv National University the observations for five main-belt asteroids were performed to obtain their magnitude-phase relations and other physical characteristics. Preliminary results of the photometrical observations for the large dark asteroid (1390) Abastumani are presented.

Despite the explosive growth in the amount of data in astronomy, one of the main cases is the sea... more Despite the explosive growth in the amount of data in astronomy, one of the main cases is the search for new objects (and identification of its parameters) with a limited number of observations. We discuss the possibilities of making a decision in the conditions of a limited amount of information (data set) obtained as a result of a large number of observations and identifying the optimal number of independent parameters that allow exploring and describing the phenomenon. These cases are well known in astrophysics, e.g. when searching for electromagnetic counterparts of gravitational-wave events detected by LIGO/Virgo detectors and searching and classifying supernova associated with Gamma-Ray Bursts (GRB). We describe observations and discovery of the supernova (SN) associated with gamma-ray burst GRB 181201A and present preliminary parameters of the SN. The positive decision about SN was generated based only on five high-precision observations. This is one more discovery of SN amon...

GRB Coordinates Network, 2016

The International Scientific Optical Network (ISON) was established in 2004 to carry out regular ... more The International Scientific Optical Network (ISON) was established in 2004 to carry out regular monitoring of the population of artificial objects at high altitude orbits (mainly GEO). Now the network joins 23 observatories in 10 countries, which are located at different longitudes and latitudes of the globe (Molotov et al., 2009). Since 2006 the photometric observations of asteroids has been started in frame of ISON to increase the network scientific output. The main targets of these observations are near-Earth asteroids (NEAs) as hazardous objects pose a threat for the Earth civilization. The observations are aimed to investigate physical properties of the asteroids and astrometric positions. The network is also involved into projects on searching binary asteroids, support of asteroid radar research and investigation of the YORP effect. In last two years the project was also directed to be involved in follow-up and discovery asteroids and comets, especially NEAs in frame of the Asteroid Hazard problem. Capabilities of our network to obtain astrometry and photometric data can be used in frame of the project GAIA for doing observations of newly discovered asteroids and comets.

GRB Coordinates Network, 2018

Photometric and polarimetric observations of the near-Earth asteroids (3200) Phaethon in 2017 and... more Photometric and polarimetric observations of the near-Earth asteroids (3200) Phaethon in 2017 and 2018 oppositions, and (155140) 2005 UD during its appearance in 2018 are presented. The rotation periods, color lightcurves, phase angle dependences were obtained.

GRB Coordinates Network, 2015

GRB Coordinates Network, 2018

GRB Coordinates Network, 2013

41st COSPAR Scientific Assembly, Jul 1, 2016

GRB Coordinates Network, 2014

We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Tr... more We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Transient Facility (ZTF). Over a period of six months, from 1 April to 30 September 2021, all ZTF triggers were examined in real time by a dedicated science module implemented in the Fink broker, which will be used for the data processing of the Vera C. Rubin Observatory. In this article, we present three selection methods to identify promising kilonova candidates. Out of more than 35 million candidates, a hundred sources have passed our selection criteria. Six were then followed-up by GRANDMA (by both professional and amateur astronomers). The majority were finally classified either as asteroids or as supernovae events. We then demonstrate the added value of a substantial follow-up campaign of optical transients. We mobilized 37 telescopes, bringing together a large sample of images, taken under various conditions and quality. To complement the orphan kilonova candidates (those without as...

In 2015 quantity of telescopes of 37 observatories that collaborate with ISON project in 17 count... more In 2015 quantity of telescopes of 37 observatories that collaborate with ISON project in 17 countries is close to 100 units. These telescopes are combined in 4 main subsystems - for GEO survey, bright and faint objects follow up, and for asteroids (ASPIN). KIAM collected 10.7 million astrometry measurements during 2014 and 9.7 millions to the middle of September 2015. Since 2010, ISON is involving in operations of the Roscosmos Automated system of warning on dangerous situations in space (ASPOS OKP). In this system KIAM is responsible for the daily conjunction analysis at high orbits. To improve the quality of this activity ISON is deploying additional subnetwork for extended GEO surveys from 7 small (18-19.2 cm aperture) automated telescopes with field of view 7x7 degree. Extended surveys of new ISON subnetwork allows to KIAM to determine more precise GEO orbits, to detect maneuvers of active satellites and to help maintain the orbits of GEO objects in clusters. Also it was attempt...

International Scientific Optical Network (ISON) represents one of largest systems specializing in... more International Scientific Optical Network (ISON) represents one of largest systems specializing in observation of space objects. ISON provides permanent monitoring of the whole GEO region, regular surveying of Molniya type orbits, and tracking of objects at GEO, GTO, HEO and LEO. ISON project is continuously developing and is joining now the 37 observation facilities in 16 countries with 86 telescopes of different class (aperture from 12.5 cm to 2.6 m). 15.4 millions measurements in 2.1 millions of tracklets for about 5000 objects are collected by KIAM in 2015. 339 new space objects have been discovered, 307 previously lost objects have been rediscovered. For comparison, 160 new objects have been discovered in 2014, and 250 in 2013. 2014 was devoted to putting into operation of small survey and follow up telescopes (including new subsystem for extended GEO surveys to determine more precise orbits for conjunction analysis). This caused some decreasing of new space debris discovery rat...

In frame of an implementation of the cooperative program studying of asteroids between the Kharad... more In frame of an implementation of the cooperative program studying of asteroids between the Kharadze Abastumani Astrophysical Observatory and the Astronomical Institute of V.N. Karazin Kharkiv National University the observations for five main-belt asteroids were performed to obtain their magnitude-phase relations and other physical characteristics. Preliminary results of the photometrical observations for the large dark asteroid (1390) Abastumani are presented.

Despite the explosive growth in the amount of data in astronomy, one of the main cases is the sea... more Despite the explosive growth in the amount of data in astronomy, one of the main cases is the search for new objects (and identification of its parameters) with a limited number of observations. We discuss the possibilities of making a decision in the conditions of a limited amount of information (data set) obtained as a result of a large number of observations and identifying the optimal number of independent parameters that allow exploring and describing the phenomenon. These cases are well known in astrophysics, e.g. when searching for electromagnetic counterparts of gravitational-wave events detected by LIGO/Virgo detectors and searching and classifying supernova associated with Gamma-Ray Bursts (GRB). We describe observations and discovery of the supernova (SN) associated with gamma-ray burst GRB 181201A and present preliminary parameters of the SN. The positive decision about SN was generated based only on five high-precision observations. This is one more discovery of SN amon...

GRB Coordinates Network, 2016

The International Scientific Optical Network (ISON) was established in 2004 to carry out regular ... more The International Scientific Optical Network (ISON) was established in 2004 to carry out regular monitoring of the population of artificial objects at high altitude orbits (mainly GEO). Now the network joins 23 observatories in 10 countries, which are located at different longitudes and latitudes of the globe (Molotov et al., 2009). Since 2006 the photometric observations of asteroids has been started in frame of ISON to increase the network scientific output. The main targets of these observations are near-Earth asteroids (NEAs) as hazardous objects pose a threat for the Earth civilization. The observations are aimed to investigate physical properties of the asteroids and astrometric positions. The network is also involved into projects on searching binary asteroids, support of asteroid radar research and investigation of the YORP effect. In last two years the project was also directed to be involved in follow-up and discovery asteroids and comets, especially NEAs in frame of the Asteroid Hazard problem. Capabilities of our network to obtain astrometry and photometric data can be used in frame of the project GAIA for doing observations of newly discovered asteroids and comets.

GRB Coordinates Network, 2018

Photometric and polarimetric observations of the near-Earth asteroids (3200) Phaethon in 2017 and... more Photometric and polarimetric observations of the near-Earth asteroids (3200) Phaethon in 2017 and 2018 oppositions, and (155140) 2005 UD during its appearance in 2018 are presented. The rotation periods, color lightcurves, phase angle dependences were obtained.

GRB Coordinates Network, 2015

GRB Coordinates Network, 2018

GRB Coordinates Network, 2013

41st COSPAR Scientific Assembly, Jul 1, 2016

GRB Coordinates Network, 2014

We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Tr... more We present our follow-up observations with GRANDMA of transient sources revealed by the Zwicky Transient Facility (ZTF). Over a period of six months, from 1 April to 30 September 2021, all ZTF triggers were examined in real time by a dedicated science module implemented in the Fink broker, which will be used for the data processing of the Vera C. Rubin Observatory. In this article, we present three selection methods to identify promising kilonova candidates. Out of more than 35 million candidates, a hundred sources have passed our selection criteria. Six were then followed-up by GRANDMA (by both professional and amateur astronomers). The majority were finally classified either as asteroids or as supernovae events. We then demonstrate the added value of a substantial follow-up campaign of optical transients. We mobilized 37 telescopes, bringing together a large sample of images, taken under various conditions and quality. To complement the orphan kilonova candidates (those without as...

In 2015 quantity of telescopes of 37 observatories that collaborate with ISON project in 17 count... more In 2015 quantity of telescopes of 37 observatories that collaborate with ISON project in 17 countries is close to 100 units. These telescopes are combined in 4 main subsystems - for GEO survey, bright and faint objects follow up, and for asteroids (ASPIN). KIAM collected 10.7 million astrometry measurements during 2014 and 9.7 millions to the middle of September 2015. Since 2010, ISON is involving in operations of the Roscosmos Automated system of warning on dangerous situations in space (ASPOS OKP). In this system KIAM is responsible for the daily conjunction analysis at high orbits. To improve the quality of this activity ISON is deploying additional subnetwork for extended GEO surveys from 7 small (18-19.2 cm aperture) automated telescopes with field of view 7x7 degree. Extended surveys of new ISON subnetwork allows to KIAM to determine more precise GEO orbits, to detect maneuvers of active satellites and to help maintain the orbits of GEO objects in clusters. Also it was attempt...

International Scientific Optical Network (ISON) represents one of largest systems specializing in... more International Scientific Optical Network (ISON) represents one of largest systems specializing in observation of space objects. ISON provides permanent monitoring of the whole GEO region, regular surveying of Molniya type orbits, and tracking of objects at GEO, GTO, HEO and LEO. ISON project is continuously developing and is joining now the 37 observation facilities in 16 countries with 86 telescopes of different class (aperture from 12.5 cm to 2.6 m). 15.4 millions measurements in 2.1 millions of tracklets for about 5000 objects are collected by KIAM in 2015. 339 new space objects have been discovered, 307 previously lost objects have been rediscovered. For comparison, 160 new objects have been discovered in 2014, and 250 in 2013. 2014 was devoted to putting into operation of small survey and follow up telescopes (including new subsystem for extended GEO surveys to determine more precise orbits for conjunction analysis). This caused some decreasing of new space debris discovery rat...