RADIOASTRON PROJECT: CALIBRATION OF THE SPACE RADIO TELESCOPE DURING THE FLIGHT IN 2011-2018 IN THE 1.35, 6.2, 18, 92 CM BANDS USING IMPROVED PRIMARY CALIBRATION SCALES
Авторы:
1.
Astro Space Center of P. N. Lebedev Physical Institute
2.
Astro Space Center of P. N. Lebedev Physical Institute
3.
Astro Space Center of P. N. Lebedev Physical Institute
4.
Astro Space Center of P. N. Lebedev Physical Institute
Россия
Россия
5.
Astro Space Center of P. N. Lebedev Physical Institute of the Russian Academy of Sciences
Institute of Physics, Pontifical Catholic University of Valparaiso
Institute of Physics, Pontifical Catholic University of Valparaiso
6.
Astro Space Center of P. N. Lebedev Physical Institute
Россия
Россия
Тип:
Статья конференции
Опубликовано:
27.12.2024
Классификаторы:
УДК 52 Астрономия. Геодезия
УДК 53 Физика
УДК 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
УДК 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
УДК 523 Солнечная система
УДК 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
УДК 52-1 Метод изучения
УДК 52-6 Излучение и связанные с ним процессы
ГРНТИ 41.00 АСТРОНОМИЯ
ГРНТИ 29.35 Радиофизика. Физические основы электроники
ГРНТИ 29.31 Оптика
ГРНТИ 29.33 Лазерная физика
ГРНТИ 29.27 Физика плазмы
ГРНТИ 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
ОКСО 03.06.01 Физика и астрономия
ОКСО 03.05.01 Астрономия
ОКСО 03.04.03 Радиофизика
ББК 2 ЕСТЕСТВЕННЫЕ НАУКИ
ББК 223 Физика
ТБК 614 Астрономия
ТБК 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
УДК 53 Физика
УДК 520 Инструменты, приборы и методы астрономических наблюдений, измерений и анализа
УДК 521 Теоретическая астрономия. Небесная механика. Фундаментальная астрономия. Теория динамической и позиционной астрономии
УДК 523 Солнечная система
УДК 524 Звезды и звездные системы. Вселенная Солнце и Солнечная система
УДК 52-1 Метод изучения
УДК 52-6 Излучение и связанные с ним процессы
ГРНТИ 41.00 АСТРОНОМИЯ
ГРНТИ 29.35 Радиофизика. Физические основы электроники
ГРНТИ 29.31 Оптика
ГРНТИ 29.33 Лазерная физика
ГРНТИ 29.27 Физика плазмы
ГРНТИ 29.05 Физика элементарных частиц. Теория полей. Физика высоких энергий
ОКСО 03.06.01 Физика и астрономия
ОКСО 03.05.01 Астрономия
ОКСО 03.04.03 Радиофизика
ББК 2 ЕСТЕСТВЕННЫЕ НАУКИ
ББК 223 Физика
ТБК 614 Астрономия
ТБК 6135 Оптика
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
Язык материала:
английский
Ключевые слова:
methods: observational
Аннотация (русский):
We summarize the results of processing calibration telemetry sessions for the four known primary calibrators of spectral radio flux density—Cassiopeia A, Crab Nebula, Cygnus A, and Virgo A—in the autonomous observation mode with the space radio telescope (SRT) in flight. A new system of automated data processing was used, previously successfully tested in similar processing of the measurements with the SRT in 2015–2018 in the 6.2, 18, and 92 cm bands. The calibration of the SRT intrinsic noise and the internal artificial generators of the noise signal (NG) was performed for two versions of the primary scale of spectral radio flux density: the generally accepted original scale by Baars et al. suggested in 1977 and its improved version based on the results from newer publications. The main differences between the versions are related to the fact that the actual rate of secular variation in the fluxes of astronomical calibrators differs from the extrapolated values in the previously accepted scale. Preliminary results for the SRT calibration with the improved scale coincide within 10–15 percent with the results published earlier.
We summarize the results of processing calibration telemetry sessions for the four known primary calibrators of spectral radio flux density—Cassiopeia A, Crab Nebula, Cygnus A, and Virgo A—in the autonomous observation mode with the space radio telescope (SRT) in flight. A new system of automated data processing was used, previously successfully tested in similar processing of the measurements with the SRT in 2015–2018 in the 6.2, 18, and 92 cm bands. The calibration of the SRT intrinsic noise and the internal artificial generators of the noise signal (NG) was performed for two versions of the primary scale of spectral radio flux density: the generally accepted original scale by Baars et al. suggested in 1977 and its improved version based on the results from newer publications. The main differences between the versions are related to the fact that the actual rate of secular variation in the fluxes of astronomical calibrators differs from the extrapolated values in the previously accepted scale. Preliminary results for the SRT calibration with the improved scale coincide within 10–15 percent with the results published earlier.
Ключевые слова:
methods: observational
methods: observational
1. Baars J.W.M., Genzel R., Pauliny-Toth I.I.K., et al., 1977, Astronomy & Astrophysics, 61, p. 99
2. Ermakov A.N. and Kovalev Yu.A., 2020, Transactions of IAA RAS, 54, p. 21
3. Kovalev Yu.A., Vasil'kov V.I., Ermakov A.N., et al., 2020, Transactions of IAA RAS, 54, p. 32
4. Kovalev Yu.A., Vasilkov V.I., Ermakov A.N., et al., 2022, Astrophysical Bulletin, 77, p. 360
5. Perley R.A. and Butler B.J., 2017, Astrophysical Journal Supplement Series, 230, 1, id. 7
