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Peculiarities of Maser Data Correlation / Postcorrelation in Radioastron Mission

Published online by Cambridge University Press:  16 July 2018

I. D. Litovchenko ,
S. F. Likhachev ,
V. I. Kostenko ,
I. A. Girin ,
V. A. Ladygin ,
M. A. Shurov ,
V. Yu. Avdeev  and
A. V. Alakoz
I. D. Litovchenko
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
S. F. Likhachev
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
V. I. Kostenko
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
I. A. Girin
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
V. A. Ladygin
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
M. A. Shurov
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
V. Yu. Avdeev
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
A. V. Alakoz
Affiliation:
Astro Space Center, Lebedev Physical Institute 119991, 53, Leninskiy Prospekt, Moscow, Russia email: grosh@asc.rssi.ru
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Abstract

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We discuss specific aspects of space-ground VLBI (SVLBI) data processing of spectral line experiments (H2O & OH masers) in Radioastron project. In order to meet all technical requirements of the Radioastron mission a new software FX correlator (ASCFX) and the unique data archive which stores raw data from all VLBI stations for all experiments of the project were developed in Astro Space Center. Currently all maser observations conducted in Radioastron project were correlated using the ASCFX correlator. Positive detections on the space-ground baselines were found in 38 sessions out of 144 (detection rate of about 27%). Finally, we presented upper limits on the angular size of the most compact spots observed in two galactic H2O masers, W3OH(H2O) and OH043.8-0.1.

Keywords

Space vehiclesradio lines: ISMinstrumentation: high angular resolution.
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 443 - 444
Copyright
Copyright © International Astronomical Union 2018 

References

Kardashev, N. S., Khartov, V. V., Abramov, V. V. et al., 2013, Astron. Rep., 57, 153Google Scholar
Likhachev, S., Kostenko, V., Girin, I. et al., 2017, J. Astron. Instrum., 6, 3Google Scholar