Comparative analysis of the positional accuracy of CCD measurements of small bodies in the solar system software CoLiTec and Astrometrica

Savanevych, Vadym; Briukhovetskyi, Oleksandr; Ivashchenko, Yu. N.; Vavilova, I. B.; Bezkrovniy, M.; Dikov, E. N.; Vlasenko, V. P.; Соковикова, Н. С.; Мовсесян, Я. С.; Dikhtyar, N. Yu.; Elenin, L.; Pohorelov, A. V.; Khlamov, Sergii

doi:10.3103/s0884591315060045

Cited by 21 publications

(9 citation statements)

References 8 publications

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“…The proposed method for detection of the objects with 3σ-velocity apparent motion using Fisher f -criterion was verified by authors and implemented in the embedded plugin developed in the CoLiTec software for automated discovery of asteroids and comets (Savanevych et al 2015b).…”

Section: Discussionmentioning

confidence: 99%

“…There are many of objects with near-zero apparent motion that were detected by the CoLiTec software for automated asteroids and comets discoveries (Savanevych et al 2015b). The plugin implements the method of detection using the Fisher f -criterion (5).…”

Section: Indicators Of Quality Of the Near-zero Apparent Motion Detecmentioning

confidence: 99%

“…C/2012 S1 (ISON) comet (Fig. 8) was detected using the CoLiTec software for automated asteroids and comets discoveries (Savanevych et al 2015b) with the implemented method of detection using Fisher f -criterion (5). C/2012 S1 (ISON) comet was disintegrated at an extremely small perihelion distance of about 1 million km on the day of perihelion passage, on November 28, 2013.…”

Section: Indicators Of Quality Of the Near-zero Apparent Motion Detecmentioning

confidence: 99%

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A method of immediate detection of objects with a near-zero apparent motion in series of CCD-frames

Savanevych

Khlamov

Vavilova

et al. 2018

A&A

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The paper deals with a computational method for detection of the solar system minor bodies (SSOs), whose inter-frame shifts in series of CCD-frames during the observation are commensurate with the errors in measuring their positions. These objects have velocities of apparent motion between CCD-frames not exceeding three rms errors (3σ) of measurements of their positions. About 15% of objects have a near-zero apparent motion in CCD-frames, including the objects beyond the Jupiter's orbit as well as the asteroids heading straight to the Earth. The proposed method for detection of the object's near-zero apparent motion in series of CCD-frames is based on the Fisher f -criterion instead of using the traditional decision rules that are based on the maximum likelihood criterion. We analyzed the quality indicators of detection of the object's near-zero apparent motion applying statistical and in situ modeling techniques in terms of the conditional probability of the true detection of objects with a near-zero apparent motion. The efficiency of method being implemented as a plugin for the Collection Light Technology (CoLiTec) software for automated asteroids and comets detection has been demonstrated. Among the objects discovered with this plugin, there was the sungrazing comet C/2012 S1 (ISON). Within 26 min of the observation, the comet's image has been moved by three pixels in a series of four CCD-frames (the velocity of its apparent motion at the moment of discovery was equal to 0.8 pixels per CCD-frame; the image size on the frame was about five pixels). Next verification in observations of asteroids with a near-zero apparent motion conducted with small telescopes has confirmed an efficiency of the method even in bad conditions (strong backlight from the full Moon). So, we recommend applying the proposed method for series of observations with four or more frames.

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Section: Discussionmentioning

confidence: 99%

Section: Indicators Of Quality Of the Near-zero Apparent Motion Detecmentioning

confidence: 99%

Section: Indicators Of Quality Of the Near-zero Apparent Motion Detecmentioning

confidence: 99%

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A method of immediate detection of objects with a near-zero apparent motion in series of CCD-frames

Savanevych

Khlamov

Vavilova

et al. 2018

A&A

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“…The comparative analysis of the processing of the same frames using CoLiTec and Astrometrica software says that in the case of low signal to noise ratios, the standard deviation of positional CCD-measurements using the Astrometrica software is 30-50 % greater than that of the CoLiTec software (Savanevych et al 2015b). Since 2010, CoLiTec software has been installed at several observatories of the world with the aim of automatic discoveries of asteroids and comets on a set of CCD-frames.…”

Section: Ukrvo Softwarementioning

confidence: 99%

UkrVO Astroinformatics Software and Web-services

et al. 2016

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The aim of this paper is to introduce the software and astronomical web-services developed in frame of the Ukraine Virtual Observatory (UkrVO) and VIrtual Roentgen and Gamma Observatory (VIRGO) to the broad astronomical community. We report briefly on such web-services as the public databases "Sky Maps" of X-ray observations by XMM-Newton, the Earth Orbital Parameters for International Earth Rotation System, and the UkrVO Joint Digitized Archive of astroplates. We refer to such software as the "Multi-Column View", "Variable Stars Calculator", "FrameSmooth" for variable star's research and "Collection Light Technology" (CoLiTec) software for search and discovery of new Solar System bodies.

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“…Table 2 shows telescope technical specifications. Using the computational method described in [26] and its implementation in CoLiTec software [27][28][29], the dependences of assessments of residuals by frame axes were obtained ( Fig. 1-6).…”

Section: Building Residuals Fieldmentioning

confidence: 99%

An investigation of the reduction model power influence on the accuracy of the object’s position assessment using relative method

Pohorelov

Savanevych

Udovenko

2016

EEJET

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Висока точність астрономічних спо-стережень забезпечується виміром поло-ження об'єктів щодо обраних опорних об'єктів. Аналіз показав наявність сину-соїдальної залежності відхилень поло-жень об'єктів при кубічній моделі редук-ції і її повне усунення при використанні моделі п'ятого ступеня. Введено і проана-лізовані показники точності вимірюван-ня положень об'єктів та критерії значи-мості коефіцієнтів редукційної моделі Ключові слова: астроредукція, цифро-вий кадр, небесний об'єкт, модель редук-ції, оцінка показників точності Высокая точность астрономических наблюдений обеспечивается измерени-ем положения объектов относитель-но выбранных опорных объектов. Анализ показал наличие синусоидальной зависи-мости отклонений положений объектов при кубической модели редукции и её пол-ное устранение при использовании моде-ли пятой степени. Введены и проанализи-рованы показатели точности измерения положений объектов и критерии значимо-сти коэффициентов редукционной модели Ключевые слова: астроредукция, циф-ровой кадр, небесный объект, модель редукции, оценка показателей точности UDC 519.23: 004.932.72'1

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Comparative analysis of the positional accuracy of CCD measurements of small bodies in the solar system software CoLiTec and Astrometrica

Cited by 21 publications

References 8 publications

A method of immediate detection of objects with a near-zero apparent motion in series of CCD-frames

A method of immediate detection of objects with a near-zero apparent motion in series of CCD-frames

UkrVO Astroinformatics Software and Web-services

An investigation of the reduction model power influence on the accuracy of the object’s position assessment using relative method

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